1 // SPDX-License-Identifier: GPL-2.0
3 * (C) 2001 Clemson University and The University of Chicago
5 * See COPYING in top-level directory.
9 * Linux VFS namei operations.
13 #include "orangefs-kernel.h"
16 * Get a newly allocated inode to go with a negative dentry.
18 static int orangefs_create(struct inode *dir,
19 struct dentry *dentry,
23 struct orangefs_inode_s *parent = ORANGEFS_I(dir);
24 struct orangefs_kernel_op_s *new_op;
28 gossip_debug(GOSSIP_NAME_DEBUG, "%s: %pd\n",
32 new_op = op_alloc(ORANGEFS_VFS_OP_CREATE);
36 new_op->upcall.req.create.parent_refn = parent->refn;
38 fill_default_sys_attrs(new_op->upcall.req.create.attributes,
39 ORANGEFS_TYPE_METAFILE, mode);
41 strncpy(new_op->upcall.req.create.d_name,
42 dentry->d_name.name, ORANGEFS_NAME_MAX);
44 ret = service_operation(new_op, __func__, get_interruptible_flag(dir));
46 gossip_debug(GOSSIP_NAME_DEBUG,
47 "%s: %pd: handle:%pU: fsid:%d: new_op:%p: ret:%d:\n",
50 &new_op->downcall.resp.create.refn.khandle,
51 new_op->downcall.resp.create.refn.fs_id,
58 inode = orangefs_new_inode(dir->i_sb, dir, S_IFREG | mode, 0,
59 &new_op->downcall.resp.create.refn);
61 gossip_err("%s: Failed to allocate inode for file :%pd:\n",
68 gossip_debug(GOSSIP_NAME_DEBUG,
69 "%s: Assigned inode :%pU: for file :%pd:\n",
71 get_khandle_from_ino(inode),
74 d_instantiate_new(dentry, inode);
75 orangefs_set_timeout(dentry);
76 ORANGEFS_I(inode)->getattr_time = jiffies - 1;
77 ORANGEFS_I(inode)->getattr_mask = STATX_BASIC_STATS;
79 gossip_debug(GOSSIP_NAME_DEBUG,
80 "%s: dentry instantiated for %pd\n",
85 dir->i_mtime = dir->i_ctime = current_time(dir);
86 mark_inode_dirty_sync(dir);
90 gossip_debug(GOSSIP_NAME_DEBUG,
91 "%s: %pd: returning %d\n",
99 * Attempt to resolve an object name (dentry->d_name), parent handle, and
100 * fsid into a handle for the object.
102 static struct dentry *orangefs_lookup(struct inode *dir, struct dentry *dentry,
105 struct orangefs_inode_s *parent = ORANGEFS_I(dir);
106 struct orangefs_kernel_op_s *new_op;
112 * in theory we could skip a lookup here (if the intent is to
113 * create) in order to avoid a potentially failed lookup, but
114 * leaving it in can skip a valid lookup and try to create a file
115 * that already exists (e.g. the vfs already handles checking for
116 * -EEXIST on O_EXCL opens, which is broken if we skip this lookup
117 * in the create path)
119 gossip_debug(GOSSIP_NAME_DEBUG, "%s called on %pd\n",
122 if (dentry->d_name.len > (ORANGEFS_NAME_MAX - 1))
123 return ERR_PTR(-ENAMETOOLONG);
125 new_op = op_alloc(ORANGEFS_VFS_OP_LOOKUP);
127 return ERR_PTR(-ENOMEM);
129 new_op->upcall.req.lookup.sym_follow = ORANGEFS_LOOKUP_LINK_NO_FOLLOW;
131 gossip_debug(GOSSIP_NAME_DEBUG, "%s:%s:%d using parent %pU\n",
135 &parent->refn.khandle);
136 new_op->upcall.req.lookup.parent_refn = parent->refn;
138 strncpy(new_op->upcall.req.lookup.d_name, dentry->d_name.name,
141 gossip_debug(GOSSIP_NAME_DEBUG,
142 "%s: doing lookup on %s under %pU,%d\n",
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);
148 ret = service_operation(new_op, __func__, get_interruptible_flag(dir));
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,
157 if (ret == -ENOENT) {
159 * if no inode was found, add a negative dentry to
160 * dcache anyway; if we don't, we don't hold expected
161 * lookup semantics and we most noticeably break
162 * during directory renames.
164 * however, if the operation failed or exited, do not
165 * add the dentry (e.g. in the case that a touch is
166 * issued on a file that already exists that was
167 * interrupted during this lookup -- no need to add
168 * another negative dentry for an existing file)
171 gossip_debug(GOSSIP_NAME_DEBUG,
172 "orangefs_lookup: Adding *negative* dentry "
182 /* must be a non-recoverable error */
187 orangefs_set_timeout(dentry);
189 inode = orangefs_iget(dir->i_sb, &new_op->downcall.resp.lookup.refn);
191 gossip_debug(GOSSIP_NAME_DEBUG,
192 "error %ld from iget\n", PTR_ERR(inode));
193 res = ERR_CAST(inode);
197 gossip_debug(GOSSIP_NAME_DEBUG,
199 "Found good inode [%lu] with count [%d]\n",
204 (int)atomic_read(&inode->i_count));
206 /* update dentry/inode pair into dcache */
207 res = d_splice_alias(inode, dentry);
209 gossip_debug(GOSSIP_NAME_DEBUG,
210 "Lookup success (inode ct = %d)\n",
211 (int)atomic_read(&inode->i_count));
217 /* return 0 on success; non-zero otherwise */
218 static int orangefs_unlink(struct inode *dir, struct dentry *dentry)
220 struct inode *inode = dentry->d_inode;
221 struct orangefs_inode_s *parent = ORANGEFS_I(dir);
222 struct orangefs_kernel_op_s *new_op;
225 gossip_debug(GOSSIP_NAME_DEBUG,
226 "%s: called on %pd\n"
227 " (inode %pU): Parent is %pU | fs_id %d\n",
230 get_khandle_from_ino(inode),
231 &parent->refn.khandle,
234 new_op = op_alloc(ORANGEFS_VFS_OP_REMOVE);
238 new_op->upcall.req.remove.parent_refn = parent->refn;
239 strncpy(new_op->upcall.req.remove.d_name, dentry->d_name.name,
242 ret = service_operation(new_op, "orangefs_unlink",
243 get_interruptible_flag(inode));
245 gossip_debug(GOSSIP_NAME_DEBUG,
246 "%s: service_operation returned:%d:\n",
255 SetMtimeFlag(parent);
256 dir->i_mtime = dir->i_ctime = current_time(dir);
257 mark_inode_dirty_sync(dir);
262 static int orangefs_symlink(struct inode *dir,
263 struct dentry *dentry,
266 struct orangefs_inode_s *parent = ORANGEFS_I(dir);
267 struct orangefs_kernel_op_s *new_op;
272 gossip_debug(GOSSIP_NAME_DEBUG, "%s: called\n", __func__);
277 if (strlen(symname)+1 > ORANGEFS_NAME_MAX)
278 return -ENAMETOOLONG;
280 new_op = op_alloc(ORANGEFS_VFS_OP_SYMLINK);
284 new_op->upcall.req.sym.parent_refn = parent->refn;
286 fill_default_sys_attrs(new_op->upcall.req.sym.attributes,
287 ORANGEFS_TYPE_SYMLINK,
290 strncpy(new_op->upcall.req.sym.entry_name,
293 strncpy(new_op->upcall.req.sym.target, symname, ORANGEFS_NAME_MAX);
295 ret = service_operation(new_op, __func__, get_interruptible_flag(dir));
297 gossip_debug(GOSSIP_NAME_DEBUG,
298 "Symlink Got ORANGEFS handle %pU on fsid %d (ret=%d)\n",
299 &new_op->downcall.resp.sym.refn.khandle,
300 new_op->downcall.resp.sym.refn.fs_id, ret);
303 gossip_debug(GOSSIP_NAME_DEBUG,
304 "%s: failed with error code %d\n",
309 inode = orangefs_new_inode(dir->i_sb, dir, S_IFLNK | mode, 0,
310 &new_op->downcall.resp.sym.refn);
313 ("*** Failed to allocate orangefs symlink inode\n");
314 ret = PTR_ERR(inode);
318 * This is necessary because orangefs_inode_getattr will not
319 * re-read symlink size as it is impossible for it to change.
320 * Invalidating the cache does not help. orangefs_new_inode
321 * does not set the correct size (it does not know symname).
323 inode->i_size = strlen(symname);
325 gossip_debug(GOSSIP_NAME_DEBUG,
326 "Assigned symlink inode new number of %pU\n",
327 get_khandle_from_ino(inode));
329 d_instantiate_new(dentry, inode);
330 orangefs_set_timeout(dentry);
331 ORANGEFS_I(inode)->getattr_time = jiffies - 1;
332 ORANGEFS_I(inode)->getattr_mask = STATX_BASIC_STATS;
334 gossip_debug(GOSSIP_NAME_DEBUG,
335 "Inode (Symlink) %pU -> %pd\n",
336 get_khandle_from_ino(inode),
339 SetMtimeFlag(parent);
340 dir->i_mtime = dir->i_ctime = current_time(dir);
341 mark_inode_dirty_sync(dir);
348 static int orangefs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
350 struct orangefs_inode_s *parent = ORANGEFS_I(dir);
351 struct orangefs_kernel_op_s *new_op;
355 new_op = op_alloc(ORANGEFS_VFS_OP_MKDIR);
359 new_op->upcall.req.mkdir.parent_refn = parent->refn;
361 fill_default_sys_attrs(new_op->upcall.req.mkdir.attributes,
362 ORANGEFS_TYPE_DIRECTORY, mode);
364 strncpy(new_op->upcall.req.mkdir.d_name,
365 dentry->d_name.name, ORANGEFS_NAME_MAX);
367 ret = service_operation(new_op, __func__, get_interruptible_flag(dir));
369 gossip_debug(GOSSIP_NAME_DEBUG,
370 "Mkdir Got ORANGEFS handle %pU on fsid %d\n",
371 &new_op->downcall.resp.mkdir.refn.khandle,
372 new_op->downcall.resp.mkdir.refn.fs_id);
375 gossip_debug(GOSSIP_NAME_DEBUG,
376 "%s: failed with error code %d\n",
381 inode = orangefs_new_inode(dir->i_sb, dir, S_IFDIR | mode, 0,
382 &new_op->downcall.resp.mkdir.refn);
384 gossip_err("*** Failed to allocate orangefs dir inode\n");
385 ret = PTR_ERR(inode);
389 gossip_debug(GOSSIP_NAME_DEBUG,
390 "Assigned dir inode new number of %pU\n",
391 get_khandle_from_ino(inode));
393 d_instantiate_new(dentry, inode);
394 orangefs_set_timeout(dentry);
395 ORANGEFS_I(inode)->getattr_time = jiffies - 1;
396 ORANGEFS_I(inode)->getattr_mask = STATX_BASIC_STATS;
398 gossip_debug(GOSSIP_NAME_DEBUG,
399 "Inode (Directory) %pU -> %pd\n",
400 get_khandle_from_ino(inode),
404 * NOTE: we have no good way to keep nlink consistent for directories
405 * across clients; keep constant at 1.
407 SetMtimeFlag(parent);
408 dir->i_mtime = dir->i_ctime = current_time(dir);
409 mark_inode_dirty_sync(dir);
415 static int orangefs_rename(struct inode *old_dir,
416 struct dentry *old_dentry,
417 struct inode *new_dir,
418 struct dentry *new_dentry,
421 struct orangefs_kernel_op_s *new_op;
427 gossip_debug(GOSSIP_NAME_DEBUG,
428 "orangefs_rename: called (%pd2 => %pd2) ct=%d\n",
429 old_dentry, new_dentry, d_count(new_dentry));
431 ORANGEFS_I(new_dentry->d_parent->d_inode)->getattr_time = jiffies - 1;
433 new_op = op_alloc(ORANGEFS_VFS_OP_RENAME);
437 new_op->upcall.req.rename.old_parent_refn = ORANGEFS_I(old_dir)->refn;
438 new_op->upcall.req.rename.new_parent_refn = ORANGEFS_I(new_dir)->refn;
440 strncpy(new_op->upcall.req.rename.d_old_name,
441 old_dentry->d_name.name,
443 strncpy(new_op->upcall.req.rename.d_new_name,
444 new_dentry->d_name.name,
447 ret = service_operation(new_op,
449 get_interruptible_flag(old_dentry->d_inode));
451 gossip_debug(GOSSIP_NAME_DEBUG,
452 "orangefs_rename: got downcall status %d\n",
455 if (new_dentry->d_inode)
456 new_dentry->d_inode->i_ctime = current_time(new_dentry->d_inode);
462 /* ORANGEFS implementation of VFS inode operations for directories */
463 const struct inode_operations orangefs_dir_inode_operations = {
464 .lookup = orangefs_lookup,
465 .get_acl = orangefs_get_acl,
466 .set_acl = orangefs_set_acl,
467 .create = orangefs_create,
468 .unlink = orangefs_unlink,
469 .symlink = orangefs_symlink,
470 .mkdir = orangefs_mkdir,
471 .rmdir = orangefs_unlink,
472 .rename = orangefs_rename,
473 .setattr = orangefs_setattr,
474 .getattr = orangefs_getattr,
475 .listxattr = orangefs_listxattr,
476 .permission = orangefs_permission,