2 * (C) 2001 Clemson University and The University of Chicago
4 * See COPYING in top-level directory.
8 * Linux VFS namei operations.
12 #include "orangefs-kernel.h"
15 * Get a newly allocated inode to go with a negative dentry.
17 static int orangefs_create(struct inode *dir,
18 struct dentry *dentry,
22 struct orangefs_inode_s *parent = ORANGEFS_I(dir);
23 struct orangefs_kernel_op_s *new_op;
27 gossip_debug(GOSSIP_NAME_DEBUG, "%s: %s\n",
31 new_op = op_alloc(ORANGEFS_VFS_OP_CREATE);
35 new_op->upcall.req.create.parent_refn = parent->refn;
37 fill_default_sys_attrs(new_op->upcall.req.create.attributes,
38 ORANGEFS_TYPE_METAFILE, mode);
40 strncpy(new_op->upcall.req.create.d_name,
41 dentry->d_name.name, ORANGEFS_NAME_MAX);
43 ret = service_operation(new_op, __func__, get_interruptible_flag(dir));
45 gossip_debug(GOSSIP_NAME_DEBUG,
46 "%s: %s: handle:%pU: fsid:%d: new_op:%p: ret:%d:\n",
49 &new_op->downcall.resp.create.refn.khandle,
50 new_op->downcall.resp.create.refn.fs_id,
57 inode = orangefs_new_inode(dir->i_sb, dir, S_IFREG | mode, 0,
58 &new_op->downcall.resp.create.refn);
60 gossip_err("%s: Failed to allocate inode for file :%s:\n",
67 gossip_debug(GOSSIP_NAME_DEBUG,
68 "%s: Assigned inode :%pU: for file :%s:\n",
70 get_khandle_from_ino(inode),
73 d_instantiate(dentry, inode);
74 unlock_new_inode(inode);
76 gossip_debug(GOSSIP_NAME_DEBUG,
77 "%s: dentry instantiated for %s\n",
82 dir->i_mtime = dir->i_ctime = current_fs_time(dir->i_sb);
83 mark_inode_dirty_sync(dir);
87 gossip_debug(GOSSIP_NAME_DEBUG,
88 "%s: %s: returning %d\n",
96 * Attempt to resolve an object name (dentry->d_name), parent handle, and
97 * fsid into a handle for the object.
99 static struct dentry *orangefs_lookup(struct inode *dir, struct dentry *dentry,
102 struct orangefs_inode_s *parent = ORANGEFS_I(dir);
103 struct orangefs_kernel_op_s *new_op;
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)
116 gossip_debug(GOSSIP_NAME_DEBUG, "%s called on %s\n",
117 __func__, dentry->d_name.name);
119 if (dentry->d_name.len > (ORANGEFS_NAME_MAX - 1))
120 return ERR_PTR(-ENAMETOOLONG);
122 new_op = op_alloc(ORANGEFS_VFS_OP_LOOKUP);
124 return ERR_PTR(-ENOMEM);
126 new_op->upcall.req.lookup.sym_follow = ORANGEFS_LOOKUP_LINK_NO_FOLLOW;
128 gossip_debug(GOSSIP_NAME_DEBUG, "%s:%s:%d using parent %pU\n",
132 &parent->refn.khandle);
133 new_op->upcall.req.lookup.parent_refn = parent->refn;
135 strncpy(new_op->upcall.req.lookup.d_name, dentry->d_name.name,
138 gossip_debug(GOSSIP_NAME_DEBUG,
139 "%s: doing lookup on %s under %pU,%d\n",
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);
145 ret = service_operation(new_op, __func__, get_interruptible_flag(dir));
147 gossip_debug(GOSSIP_NAME_DEBUG,
148 "Lookup Got %pU, fsid %d (ret=%d)\n",
149 &new_op->downcall.resp.lookup.refn.khandle,
150 new_op->downcall.resp.lookup.refn.fs_id,
154 if (ret == -ENOENT) {
156 * if no inode was found, add a negative dentry to
157 * dcache anyway; if we don't, we don't hold expected
158 * lookup semantics and we most noticeably break
159 * during directory renames.
161 * however, if the operation failed or exited, do not
162 * add the dentry (e.g. in the case that a touch is
163 * issued on a file that already exists that was
164 * interrupted during this lookup -- no need to add
165 * another negative dentry for an existing file)
168 gossip_debug(GOSSIP_NAME_DEBUG,
169 "orangefs_lookup: Adding *negative* dentry "
172 dentry->d_name.name);
179 /* must be a non-recoverable error */
184 inode = orangefs_iget(dir->i_sb, &new_op->downcall.resp.lookup.refn);
186 gossip_debug(GOSSIP_NAME_DEBUG,
187 "error %ld from iget\n", PTR_ERR(inode));
188 res = ERR_CAST(inode);
192 gossip_debug(GOSSIP_NAME_DEBUG,
194 "Found good inode [%lu] with count [%d]\n",
199 (int)atomic_read(&inode->i_count));
201 /* update dentry/inode pair into dcache */
202 res = d_splice_alias(inode, dentry);
204 gossip_debug(GOSSIP_NAME_DEBUG,
205 "Lookup success (inode ct = %d)\n",
206 (int)atomic_read(&inode->i_count));
212 /* return 0 on success; non-zero otherwise */
213 static int orangefs_unlink(struct inode *dir, struct dentry *dentry)
215 struct inode *inode = dentry->d_inode;
216 struct orangefs_inode_s *parent = ORANGEFS_I(dir);
217 struct orangefs_kernel_op_s *new_op;
220 gossip_debug(GOSSIP_NAME_DEBUG,
222 " (inode %pU): Parent is %pU | fs_id %d\n",
225 get_khandle_from_ino(inode),
226 &parent->refn.khandle,
229 new_op = op_alloc(ORANGEFS_VFS_OP_REMOVE);
233 new_op->upcall.req.remove.parent_refn = parent->refn;
234 strncpy(new_op->upcall.req.remove.d_name, dentry->d_name.name,
237 ret = service_operation(new_op, "orangefs_unlink",
238 get_interruptible_flag(inode));
240 gossip_debug(GOSSIP_NAME_DEBUG,
241 "%s: service_operation returned:%d:\n",
250 SetMtimeFlag(parent);
251 dir->i_mtime = dir->i_ctime = current_fs_time(dir->i_sb);
252 mark_inode_dirty_sync(dir);
257 static int orangefs_symlink(struct inode *dir,
258 struct dentry *dentry,
261 struct orangefs_inode_s *parent = ORANGEFS_I(dir);
262 struct orangefs_kernel_op_s *new_op;
267 gossip_debug(GOSSIP_NAME_DEBUG, "%s: called\n", __func__);
272 if (strlen(symname)+1 > ORANGEFS_NAME_MAX)
273 return -ENAMETOOLONG;
275 new_op = op_alloc(ORANGEFS_VFS_OP_SYMLINK);
279 new_op->upcall.req.sym.parent_refn = parent->refn;
281 fill_default_sys_attrs(new_op->upcall.req.sym.attributes,
282 ORANGEFS_TYPE_SYMLINK,
285 strncpy(new_op->upcall.req.sym.entry_name,
288 strncpy(new_op->upcall.req.sym.target, symname, ORANGEFS_NAME_MAX);
290 ret = service_operation(new_op, __func__, get_interruptible_flag(dir));
292 gossip_debug(GOSSIP_NAME_DEBUG,
293 "Symlink Got ORANGEFS handle %pU on fsid %d (ret=%d)\n",
294 &new_op->downcall.resp.sym.refn.khandle,
295 new_op->downcall.resp.sym.refn.fs_id, ret);
298 gossip_debug(GOSSIP_NAME_DEBUG,
299 "%s: failed with error code %d\n",
304 inode = orangefs_new_inode(dir->i_sb, dir, S_IFLNK | mode, 0,
305 &new_op->downcall.resp.sym.refn);
308 ("*** Failed to allocate orangefs symlink inode\n");
309 ret = PTR_ERR(inode);
313 gossip_debug(GOSSIP_NAME_DEBUG,
314 "Assigned symlink inode new number of %pU\n",
315 get_khandle_from_ino(inode));
317 d_instantiate(dentry, inode);
318 unlock_new_inode(inode);
320 gossip_debug(GOSSIP_NAME_DEBUG,
321 "Inode (Symlink) %pU -> %s\n",
322 get_khandle_from_ino(inode),
323 dentry->d_name.name);
325 SetMtimeFlag(parent);
326 dir->i_mtime = dir->i_ctime = current_fs_time(dir->i_sb);
327 mark_inode_dirty_sync(dir);
334 static int orangefs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
336 struct orangefs_inode_s *parent = ORANGEFS_I(dir);
337 struct orangefs_kernel_op_s *new_op;
341 new_op = op_alloc(ORANGEFS_VFS_OP_MKDIR);
345 new_op->upcall.req.mkdir.parent_refn = parent->refn;
347 fill_default_sys_attrs(new_op->upcall.req.mkdir.attributes,
348 ORANGEFS_TYPE_DIRECTORY, mode);
350 strncpy(new_op->upcall.req.mkdir.d_name,
351 dentry->d_name.name, ORANGEFS_NAME_MAX);
353 ret = service_operation(new_op, __func__, get_interruptible_flag(dir));
355 gossip_debug(GOSSIP_NAME_DEBUG,
356 "Mkdir Got ORANGEFS handle %pU on fsid %d\n",
357 &new_op->downcall.resp.mkdir.refn.khandle,
358 new_op->downcall.resp.mkdir.refn.fs_id);
361 gossip_debug(GOSSIP_NAME_DEBUG,
362 "%s: failed with error code %d\n",
367 inode = orangefs_new_inode(dir->i_sb, dir, S_IFDIR | mode, 0,
368 &new_op->downcall.resp.mkdir.refn);
370 gossip_err("*** Failed to allocate orangefs dir inode\n");
371 ret = PTR_ERR(inode);
375 gossip_debug(GOSSIP_NAME_DEBUG,
376 "Assigned dir inode new number of %pU\n",
377 get_khandle_from_ino(inode));
379 d_instantiate(dentry, inode);
380 unlock_new_inode(inode);
382 gossip_debug(GOSSIP_NAME_DEBUG,
383 "Inode (Directory) %pU -> %s\n",
384 get_khandle_from_ino(inode),
385 dentry->d_name.name);
388 * NOTE: we have no good way to keep nlink consistent for directories
389 * across clients; keep constant at 1.
391 SetMtimeFlag(parent);
392 dir->i_mtime = dir->i_ctime = current_fs_time(dir->i_sb);
393 mark_inode_dirty_sync(dir);
399 static int orangefs_rename(struct inode *old_dir,
400 struct dentry *old_dentry,
401 struct inode *new_dir,
402 struct dentry *new_dentry)
404 struct orangefs_kernel_op_s *new_op;
407 gossip_debug(GOSSIP_NAME_DEBUG,
408 "orangefs_rename: called (%s/%s => %s/%s) ct=%d\n",
409 old_dentry->d_parent->d_name.name,
410 old_dentry->d_name.name,
411 new_dentry->d_parent->d_name.name,
412 new_dentry->d_name.name,
413 d_count(new_dentry));
415 new_op = op_alloc(ORANGEFS_VFS_OP_RENAME);
419 new_op->upcall.req.rename.old_parent_refn = ORANGEFS_I(old_dir)->refn;
420 new_op->upcall.req.rename.new_parent_refn = ORANGEFS_I(new_dir)->refn;
422 strncpy(new_op->upcall.req.rename.d_old_name,
423 old_dentry->d_name.name,
425 strncpy(new_op->upcall.req.rename.d_new_name,
426 new_dentry->d_name.name,
429 ret = service_operation(new_op,
431 get_interruptible_flag(old_dentry->d_inode));
433 gossip_debug(GOSSIP_NAME_DEBUG,
434 "orangefs_rename: got downcall status %d\n",
437 if (new_dentry->d_inode)
438 new_dentry->d_inode->i_ctime = CURRENT_TIME;
444 /* ORANGEFS implementation of VFS inode operations for directories */
445 struct inode_operations orangefs_dir_inode_operations = {
446 .lookup = orangefs_lookup,
447 .get_acl = orangefs_get_acl,
448 .set_acl = orangefs_set_acl,
449 .create = orangefs_create,
450 .unlink = orangefs_unlink,
451 .symlink = orangefs_symlink,
452 .mkdir = orangefs_mkdir,
453 .rmdir = orangefs_unlink,
454 .rename = orangefs_rename,
455 .setattr = orangefs_setattr,
456 .getattr = orangefs_getattr,
457 .setxattr = generic_setxattr,
458 .getxattr = generic_getxattr,
459 .removexattr = generic_removexattr,
460 .listxattr = orangefs_listxattr,
461 .permission = orangefs_permission,