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 | ||
27 | gossip_debug(GOSSIP_NAME_DEBUG, "%s: called\n", __func__); | |
28 | ||
8bb8aefd | 29 | new_op = op_alloc(ORANGEFS_VFS_OP_CREATE); |
274dcf55 MM |
30 | if (!new_op) |
31 | return -ENOMEM; | |
32 | ||
33 | new_op->upcall.req.create.parent_refn = parent->refn; | |
34 | ||
35 | fill_default_sys_attrs(new_op->upcall.req.create.attributes, | |
8bb8aefd | 36 | ORANGEFS_TYPE_METAFILE, mode); |
274dcf55 MM |
37 | |
38 | strncpy(new_op->upcall.req.create.d_name, | |
8bb8aefd | 39 | dentry->d_name.name, ORANGEFS_NAME_LEN); |
274dcf55 MM |
40 | |
41 | ret = service_operation(new_op, __func__, get_interruptible_flag(dir)); | |
42 | ||
43 | gossip_debug(GOSSIP_NAME_DEBUG, | |
8bb8aefd | 44 | "Create Got ORANGEFS handle %pU on fsid %d (ret=%d)\n", |
274dcf55 MM |
45 | &new_op->downcall.resp.create.refn.khandle, |
46 | new_op->downcall.resp.create.refn.fs_id, ret); | |
47 | ||
48 | if (ret < 0) { | |
49 | gossip_debug(GOSSIP_NAME_DEBUG, | |
50 | "%s: failed with error code %d\n", | |
51 | __func__, ret); | |
52 | goto out; | |
53 | } | |
54 | ||
8bb8aefd | 55 | inode = orangefs_new_inode(dir->i_sb, dir, S_IFREG | mode, 0, |
274dcf55 MM |
56 | &new_op->downcall.resp.create.refn); |
57 | if (IS_ERR(inode)) { | |
8bb8aefd | 58 | gossip_err("*** Failed to allocate orangefs file inode\n"); |
274dcf55 MM |
59 | ret = PTR_ERR(inode); |
60 | goto out; | |
61 | } | |
62 | ||
63 | gossip_debug(GOSSIP_NAME_DEBUG, | |
64 | "Assigned file inode new number of %pU\n", | |
65 | get_khandle_from_ino(inode)); | |
66 | ||
67 | d_instantiate(dentry, inode); | |
68 | unlock_new_inode(inode); | |
69 | ||
70 | gossip_debug(GOSSIP_NAME_DEBUG, | |
71 | "Inode (Regular File) %pU -> %s\n", | |
72 | get_khandle_from_ino(inode), | |
73 | dentry->d_name.name); | |
74 | ||
75 | SetMtimeFlag(parent); | |
76 | dir->i_mtime = dir->i_ctime = current_fs_time(dir->i_sb); | |
77 | mark_inode_dirty_sync(dir); | |
78 | ret = 0; | |
79 | out: | |
80 | op_release(new_op); | |
81 | gossip_debug(GOSSIP_NAME_DEBUG, "%s: returning %d\n", __func__, ret); | |
82 | return ret; | |
83 | } | |
84 | ||
85 | /* | |
86 | * Attempt to resolve an object name (dentry->d_name), parent handle, and | |
87 | * fsid into a handle for the object. | |
88 | */ | |
8bb8aefd | 89 | static struct dentry *orangefs_lookup(struct inode *dir, struct dentry *dentry, |
274dcf55 MM |
90 | unsigned int flags) |
91 | { | |
8bb8aefd YL |
92 | struct orangefs_inode_s *parent = ORANGEFS_I(dir); |
93 | struct orangefs_kernel_op_s *new_op; | |
274dcf55 MM |
94 | struct inode *inode; |
95 | struct dentry *res; | |
96 | int ret = -EINVAL; | |
97 | ||
98 | /* | |
99 | * in theory we could skip a lookup here (if the intent is to | |
100 | * create) in order to avoid a potentially failed lookup, but | |
101 | * leaving it in can skip a valid lookup and try to create a file | |
102 | * that already exists (e.g. the vfs already handles checking for | |
103 | * -EEXIST on O_EXCL opens, which is broken if we skip this lookup | |
104 | * in the create path) | |
105 | */ | |
106 | gossip_debug(GOSSIP_NAME_DEBUG, "%s called on %s\n", | |
107 | __func__, dentry->d_name.name); | |
108 | ||
8bb8aefd | 109 | if (dentry->d_name.len > (ORANGEFS_NAME_LEN - 1)) |
274dcf55 MM |
110 | return ERR_PTR(-ENAMETOOLONG); |
111 | ||
8bb8aefd | 112 | new_op = op_alloc(ORANGEFS_VFS_OP_LOOKUP); |
274dcf55 MM |
113 | if (!new_op) |
114 | return ERR_PTR(-ENOMEM); | |
115 | ||
116 | new_op->upcall.req.lookup.sym_follow = flags & LOOKUP_FOLLOW; | |
117 | ||
118 | gossip_debug(GOSSIP_NAME_DEBUG, "%s:%s:%d using parent %pU\n", | |
119 | __FILE__, | |
120 | __func__, | |
121 | __LINE__, | |
122 | &parent->refn.khandle); | |
123 | new_op->upcall.req.lookup.parent_refn = parent->refn; | |
124 | ||
125 | strncpy(new_op->upcall.req.lookup.d_name, dentry->d_name.name, | |
8bb8aefd | 126 | ORANGEFS_NAME_LEN); |
274dcf55 MM |
127 | |
128 | gossip_debug(GOSSIP_NAME_DEBUG, | |
129 | "%s: doing lookup on %s under %pU,%d (follow=%s)\n", | |
130 | __func__, | |
131 | new_op->upcall.req.lookup.d_name, | |
132 | &new_op->upcall.req.lookup.parent_refn.khandle, | |
133 | new_op->upcall.req.lookup.parent_refn.fs_id, | |
134 | ((new_op->upcall.req.lookup.sym_follow == | |
8bb8aefd | 135 | ORANGEFS_LOOKUP_LINK_FOLLOW) ? "yes" : "no")); |
274dcf55 MM |
136 | |
137 | ret = service_operation(new_op, __func__, get_interruptible_flag(dir)); | |
138 | ||
139 | gossip_debug(GOSSIP_NAME_DEBUG, | |
140 | "Lookup Got %pU, fsid %d (ret=%d)\n", | |
141 | &new_op->downcall.resp.lookup.refn.khandle, | |
142 | new_op->downcall.resp.lookup.refn.fs_id, | |
143 | ret); | |
144 | ||
145 | if (ret < 0) { | |
146 | if (ret == -ENOENT) { | |
147 | /* | |
148 | * if no inode was found, add a negative dentry to | |
149 | * dcache anyway; if we don't, we don't hold expected | |
150 | * lookup semantics and we most noticeably break | |
151 | * during directory renames. | |
152 | * | |
153 | * however, if the operation failed or exited, do not | |
154 | * add the dentry (e.g. in the case that a touch is | |
155 | * issued on a file that already exists that was | |
156 | * interrupted during this lookup -- no need to add | |
157 | * another negative dentry for an existing file) | |
158 | */ | |
159 | ||
160 | gossip_debug(GOSSIP_NAME_DEBUG, | |
8bb8aefd | 161 | "orangefs_lookup: Adding *negative* dentry " |
274dcf55 MM |
162 | "%p for %s\n", |
163 | dentry, | |
164 | dentry->d_name.name); | |
165 | ||
166 | d_add(dentry, NULL); | |
167 | res = NULL; | |
168 | goto out; | |
169 | } | |
170 | ||
171 | /* must be a non-recoverable error */ | |
172 | res = ERR_PTR(ret); | |
173 | goto out; | |
174 | } | |
175 | ||
8bb8aefd | 176 | inode = orangefs_iget(dir->i_sb, &new_op->downcall.resp.lookup.refn); |
274dcf55 MM |
177 | if (IS_ERR(inode)) { |
178 | gossip_debug(GOSSIP_NAME_DEBUG, | |
179 | "error %ld from iget\n", PTR_ERR(inode)); | |
180 | res = ERR_CAST(inode); | |
181 | goto out; | |
182 | } | |
183 | ||
184 | gossip_debug(GOSSIP_NAME_DEBUG, | |
185 | "%s:%s:%d " | |
186 | "Found good inode [%lu] with count [%d]\n", | |
187 | __FILE__, | |
188 | __func__, | |
189 | __LINE__, | |
190 | inode->i_ino, | |
191 | (int)atomic_read(&inode->i_count)); | |
192 | ||
193 | /* update dentry/inode pair into dcache */ | |
194 | res = d_splice_alias(inode, dentry); | |
195 | ||
196 | gossip_debug(GOSSIP_NAME_DEBUG, | |
197 | "Lookup success (inode ct = %d)\n", | |
198 | (int)atomic_read(&inode->i_count)); | |
199 | out: | |
200 | op_release(new_op); | |
201 | return res; | |
202 | } | |
203 | ||
204 | /* return 0 on success; non-zero otherwise */ | |
8bb8aefd | 205 | static int orangefs_unlink(struct inode *dir, struct dentry *dentry) |
274dcf55 MM |
206 | { |
207 | struct inode *inode = dentry->d_inode; | |
8bb8aefd YL |
208 | struct orangefs_inode_s *parent = ORANGEFS_I(dir); |
209 | struct orangefs_kernel_op_s *new_op; | |
274dcf55 MM |
210 | int ret; |
211 | ||
212 | gossip_debug(GOSSIP_NAME_DEBUG, | |
213 | "%s: called on %s\n" | |
214 | " (inode %pU): Parent is %pU | fs_id %d\n", | |
215 | __func__, | |
216 | dentry->d_name.name, | |
217 | get_khandle_from_ino(inode), | |
218 | &parent->refn.khandle, | |
219 | parent->refn.fs_id); | |
220 | ||
8bb8aefd | 221 | new_op = op_alloc(ORANGEFS_VFS_OP_REMOVE); |
274dcf55 MM |
222 | if (!new_op) |
223 | return -ENOMEM; | |
224 | ||
225 | new_op->upcall.req.remove.parent_refn = parent->refn; | |
226 | strncpy(new_op->upcall.req.remove.d_name, dentry->d_name.name, | |
8bb8aefd | 227 | ORANGEFS_NAME_LEN); |
274dcf55 | 228 | |
8bb8aefd | 229 | ret = service_operation(new_op, "orangefs_unlink", |
274dcf55 MM |
230 | get_interruptible_flag(inode)); |
231 | ||
232 | /* when request is serviced properly, free req op struct */ | |
233 | op_release(new_op); | |
234 | ||
235 | if (!ret) { | |
236 | drop_nlink(inode); | |
237 | ||
238 | SetMtimeFlag(parent); | |
239 | dir->i_mtime = dir->i_ctime = current_fs_time(dir->i_sb); | |
240 | mark_inode_dirty_sync(dir); | |
241 | } | |
242 | return ret; | |
243 | } | |
244 | ||
8bb8aefd | 245 | static int orangefs_symlink(struct inode *dir, |
274dcf55 MM |
246 | struct dentry *dentry, |
247 | const char *symname) | |
248 | { | |
8bb8aefd YL |
249 | struct orangefs_inode_s *parent = ORANGEFS_I(dir); |
250 | struct orangefs_kernel_op_s *new_op; | |
274dcf55 MM |
251 | struct inode *inode; |
252 | int mode = 755; | |
253 | int ret; | |
254 | ||
255 | gossip_debug(GOSSIP_NAME_DEBUG, "%s: called\n", __func__); | |
256 | ||
257 | if (!symname) | |
258 | return -EINVAL; | |
259 | ||
8bb8aefd | 260 | new_op = op_alloc(ORANGEFS_VFS_OP_SYMLINK); |
274dcf55 MM |
261 | if (!new_op) |
262 | return -ENOMEM; | |
263 | ||
264 | new_op->upcall.req.sym.parent_refn = parent->refn; | |
265 | ||
266 | fill_default_sys_attrs(new_op->upcall.req.sym.attributes, | |
8bb8aefd | 267 | ORANGEFS_TYPE_SYMLINK, |
274dcf55 MM |
268 | mode); |
269 | ||
270 | strncpy(new_op->upcall.req.sym.entry_name, | |
271 | dentry->d_name.name, | |
8bb8aefd YL |
272 | ORANGEFS_NAME_LEN); |
273 | strncpy(new_op->upcall.req.sym.target, symname, ORANGEFS_NAME_LEN); | |
274dcf55 MM |
274 | |
275 | ret = service_operation(new_op, __func__, get_interruptible_flag(dir)); | |
276 | ||
277 | gossip_debug(GOSSIP_NAME_DEBUG, | |
8bb8aefd | 278 | "Symlink Got ORANGEFS handle %pU on fsid %d (ret=%d)\n", |
274dcf55 MM |
279 | &new_op->downcall.resp.sym.refn.khandle, |
280 | new_op->downcall.resp.sym.refn.fs_id, ret); | |
281 | ||
282 | if (ret < 0) { | |
283 | gossip_debug(GOSSIP_NAME_DEBUG, | |
284 | "%s: failed with error code %d\n", | |
285 | __func__, ret); | |
286 | goto out; | |
287 | } | |
288 | ||
8bb8aefd | 289 | inode = orangefs_new_inode(dir->i_sb, dir, S_IFLNK | mode, 0, |
274dcf55 MM |
290 | &new_op->downcall.resp.sym.refn); |
291 | if (IS_ERR(inode)) { | |
292 | gossip_err | |
8bb8aefd | 293 | ("*** Failed to allocate orangefs symlink inode\n"); |
274dcf55 MM |
294 | ret = PTR_ERR(inode); |
295 | goto out; | |
296 | } | |
297 | ||
298 | gossip_debug(GOSSIP_NAME_DEBUG, | |
299 | "Assigned symlink inode new number of %pU\n", | |
300 | get_khandle_from_ino(inode)); | |
301 | ||
302 | d_instantiate(dentry, inode); | |
303 | unlock_new_inode(inode); | |
304 | ||
305 | gossip_debug(GOSSIP_NAME_DEBUG, | |
306 | "Inode (Symlink) %pU -> %s\n", | |
307 | get_khandle_from_ino(inode), | |
308 | dentry->d_name.name); | |
309 | ||
310 | SetMtimeFlag(parent); | |
311 | dir->i_mtime = dir->i_ctime = current_fs_time(dir->i_sb); | |
312 | mark_inode_dirty_sync(dir); | |
313 | ret = 0; | |
314 | out: | |
315 | op_release(new_op); | |
316 | return ret; | |
317 | } | |
318 | ||
8bb8aefd | 319 | static int orangefs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) |
274dcf55 | 320 | { |
8bb8aefd YL |
321 | struct orangefs_inode_s *parent = ORANGEFS_I(dir); |
322 | struct orangefs_kernel_op_s *new_op; | |
274dcf55 MM |
323 | struct inode *inode; |
324 | int ret; | |
325 | ||
8bb8aefd | 326 | new_op = op_alloc(ORANGEFS_VFS_OP_MKDIR); |
274dcf55 MM |
327 | if (!new_op) |
328 | return -ENOMEM; | |
329 | ||
330 | new_op->upcall.req.mkdir.parent_refn = parent->refn; | |
331 | ||
332 | fill_default_sys_attrs(new_op->upcall.req.mkdir.attributes, | |
8bb8aefd | 333 | ORANGEFS_TYPE_DIRECTORY, mode); |
274dcf55 MM |
334 | |
335 | strncpy(new_op->upcall.req.mkdir.d_name, | |
8bb8aefd | 336 | dentry->d_name.name, ORANGEFS_NAME_LEN); |
274dcf55 MM |
337 | |
338 | ret = service_operation(new_op, __func__, get_interruptible_flag(dir)); | |
339 | ||
340 | gossip_debug(GOSSIP_NAME_DEBUG, | |
8bb8aefd | 341 | "Mkdir Got ORANGEFS handle %pU on fsid %d\n", |
274dcf55 MM |
342 | &new_op->downcall.resp.mkdir.refn.khandle, |
343 | new_op->downcall.resp.mkdir.refn.fs_id); | |
344 | ||
345 | if (ret < 0) { | |
346 | gossip_debug(GOSSIP_NAME_DEBUG, | |
347 | "%s: failed with error code %d\n", | |
348 | __func__, ret); | |
349 | goto out; | |
350 | } | |
351 | ||
8bb8aefd | 352 | inode = orangefs_new_inode(dir->i_sb, dir, S_IFDIR | mode, 0, |
274dcf55 MM |
353 | &new_op->downcall.resp.mkdir.refn); |
354 | if (IS_ERR(inode)) { | |
8bb8aefd | 355 | gossip_err("*** Failed to allocate orangefs dir inode\n"); |
274dcf55 MM |
356 | ret = PTR_ERR(inode); |
357 | goto out; | |
358 | } | |
359 | ||
360 | gossip_debug(GOSSIP_NAME_DEBUG, | |
361 | "Assigned dir inode new number of %pU\n", | |
362 | get_khandle_from_ino(inode)); | |
363 | ||
364 | d_instantiate(dentry, inode); | |
365 | unlock_new_inode(inode); | |
366 | ||
367 | gossip_debug(GOSSIP_NAME_DEBUG, | |
368 | "Inode (Directory) %pU -> %s\n", | |
369 | get_khandle_from_ino(inode), | |
370 | dentry->d_name.name); | |
371 | ||
372 | /* | |
373 | * NOTE: we have no good way to keep nlink consistent for directories | |
374 | * across clients; keep constant at 1. | |
375 | */ | |
376 | SetMtimeFlag(parent); | |
377 | dir->i_mtime = dir->i_ctime = current_fs_time(dir->i_sb); | |
378 | mark_inode_dirty_sync(dir); | |
379 | out: | |
380 | op_release(new_op); | |
381 | return ret; | |
382 | } | |
383 | ||
8bb8aefd | 384 | static int orangefs_rename(struct inode *old_dir, |
274dcf55 MM |
385 | struct dentry *old_dentry, |
386 | struct inode *new_dir, | |
387 | struct dentry *new_dentry) | |
388 | { | |
8bb8aefd | 389 | struct orangefs_kernel_op_s *new_op; |
274dcf55 MM |
390 | int ret; |
391 | ||
392 | gossip_debug(GOSSIP_NAME_DEBUG, | |
8bb8aefd | 393 | "orangefs_rename: called (%s/%s => %s/%s) ct=%d\n", |
274dcf55 MM |
394 | old_dentry->d_parent->d_name.name, |
395 | old_dentry->d_name.name, | |
396 | new_dentry->d_parent->d_name.name, | |
397 | new_dentry->d_name.name, | |
398 | d_count(new_dentry)); | |
399 | ||
8bb8aefd | 400 | new_op = op_alloc(ORANGEFS_VFS_OP_RENAME); |
274dcf55 MM |
401 | if (!new_op) |
402 | return -EINVAL; | |
403 | ||
8bb8aefd YL |
404 | new_op->upcall.req.rename.old_parent_refn = ORANGEFS_I(old_dir)->refn; |
405 | new_op->upcall.req.rename.new_parent_refn = ORANGEFS_I(new_dir)->refn; | |
274dcf55 MM |
406 | |
407 | strncpy(new_op->upcall.req.rename.d_old_name, | |
408 | old_dentry->d_name.name, | |
8bb8aefd | 409 | ORANGEFS_NAME_LEN); |
274dcf55 MM |
410 | strncpy(new_op->upcall.req.rename.d_new_name, |
411 | new_dentry->d_name.name, | |
8bb8aefd | 412 | ORANGEFS_NAME_LEN); |
274dcf55 MM |
413 | |
414 | ret = service_operation(new_op, | |
8bb8aefd | 415 | "orangefs_rename", |
274dcf55 MM |
416 | get_interruptible_flag(old_dentry->d_inode)); |
417 | ||
418 | gossip_debug(GOSSIP_NAME_DEBUG, | |
8bb8aefd | 419 | "orangefs_rename: got downcall status %d\n", |
274dcf55 MM |
420 | ret); |
421 | ||
422 | if (new_dentry->d_inode) | |
423 | new_dentry->d_inode->i_ctime = CURRENT_TIME; | |
424 | ||
425 | op_release(new_op); | |
426 | return ret; | |
427 | } | |
428 | ||
8bb8aefd YL |
429 | /* ORANGEFS implementation of VFS inode operations for directories */ |
430 | struct inode_operations orangefs_dir_inode_operations = { | |
431 | .lookup = orangefs_lookup, | |
432 | .get_acl = orangefs_get_acl, | |
433 | .set_acl = orangefs_set_acl, | |
434 | .create = orangefs_create, | |
435 | .unlink = orangefs_unlink, | |
436 | .symlink = orangefs_symlink, | |
437 | .mkdir = orangefs_mkdir, | |
438 | .rmdir = orangefs_unlink, | |
439 | .rename = orangefs_rename, | |
440 | .setattr = orangefs_setattr, | |
441 | .getattr = orangefs_getattr, | |
274dcf55 MM |
442 | .setxattr = generic_setxattr, |
443 | .getxattr = generic_getxattr, | |
444 | .removexattr = generic_removexattr, | |
8bb8aefd | 445 | .listxattr = orangefs_listxattr, |
274dcf55 | 446 | }; |