fs/ext2/namei.c

40 static inline int ext2_add_nondir(struct dentry *dentry, struct inode *inode)
42 	int err = ext2_add_link(dentry, inode);
44 		d_instantiate_new(dentry, inode);
47 	inode_dec_link_count(inode);
48 	discard_new_inode(inode);
56 static struct dentry *ext2_lookup(struct inode * dir, struct dentry *dentry, unsigned int flags)
58 	struct inode * inode;
69 		inode = NULL;
71 		inode = ext2_iget(dir->i_sb, ino);
72 		if (inode == ERR_PTR(-ESTALE)) {
74 					"deleted inode referenced: %lu",
79 	return d_splice_alias(inode, dentry);
97  * is so far negative - it has no inode.
99  * If the create succeeds, we fill in the inode information
103 			struct inode * dir, struct dentry * dentry,
106 	struct inode *inode;
113 	inode = ext2_new_inode(dir, mode, &dentry->d_name);
114 	if (IS_ERR(inode))
115 		return PTR_ERR(inode);
117 	ext2_set_file_ops(inode);
118 	mark_inode_dirty(inode);
119 	return ext2_add_nondir(dentry, inode);
122 static int ext2_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
125 	struct inode *inode = ext2_new_inode(dir, mode, NULL);
126 	if (IS_ERR(inode))
127 		return PTR_ERR(inode);
129 	ext2_set_file_ops(inode);
130 	mark_inode_dirty(inode);
131 	d_tmpfile(file, inode);
132 	unlock_new_inode(inode);
136 static int ext2_mknod (struct mnt_idmap * idmap, struct inode * dir,
139 	struct inode * inode;
146 	inode = ext2_new_inode (dir, mode, &dentry->d_name);
147 	err = PTR_ERR(inode);
148 	if (!IS_ERR(inode)) {
149 		init_special_inode(inode, inode->i_mode, rdev);
150 		inode->i_op = &ext2_special_inode_operations;
151 		mark_inode_dirty(inode);
152 		err = ext2_add_nondir(dentry, inode);
157 static int ext2_symlink (struct mnt_idmap * idmap, struct inode * dir,
163 	struct inode * inode;
172 	inode = ext2_new_inode (dir, S_IFLNK | S_IRWXUGO, &dentry->d_name);
173 	err = PTR_ERR(inode);
174 	if (IS_ERR(inode))
177 	if (l > sizeof (EXT2_I(inode)->i_data)) {
179 		inode->i_op = &ext2_symlink_inode_operations;
180 		inode_nohighmem(inode);
181 		inode->i_mapping->a_ops = &ext2_aops;
182 		err = page_symlink(inode, symname, l);
187 		inode->i_op = &ext2_fast_symlink_inode_operations;
188 		inode->i_link = (char*)EXT2_I(inode)->i_data;
189 		memcpy(inode->i_link, symname, l);
190 		inode->i_size = l-1;
192 	mark_inode_dirty(inode);
194 	err = ext2_add_nondir(dentry, inode);
199 	inode_dec_link_count(inode);
200 	discard_new_inode(inode);
204 static int ext2_link (struct dentry * old_dentry, struct inode * dir,
207 	struct inode *inode = d_inode(old_dentry);
214 	inode_set_ctime_current(inode);
215 	inode_inc_link_count(inode);
216 	ihold(inode);
218 	err = ext2_add_link(dentry, inode);
220 		d_instantiate(dentry, inode);
223 	inode_dec_link_count(inode);
224 	iput(inode);
229 	struct inode * dir, struct dentry * dentry, umode_t mode)
231 	struct inode * inode;
240 	inode = ext2_new_inode(dir, S_IFDIR | mode, &dentry->d_name);
241 	err = PTR_ERR(inode);
242 	if (IS_ERR(inode))
245 	inode->i_op = &ext2_dir_inode_operations;
246 	inode->i_fop = &ext2_dir_operations;
247 	inode->i_mapping->a_ops = &ext2_aops;
249 	inode_inc_link_count(inode);
251 	err = ext2_make_empty(inode, dir);
255 	err = ext2_add_link(dentry, inode);
259 	d_instantiate_new(dentry, inode);
264 	inode_dec_link_count(inode);
265 	inode_dec_link_count(inode);
266 	discard_new_inode(inode);
272 static int ext2_unlink(struct inode *dir, struct dentry *dentry)
274 	struct inode *inode = d_inode(dentry);
294 	inode_set_ctime_to_ts(inode, inode_get_ctime(dir));
295 	inode_dec_link_count(inode);
301 static int ext2_rmdir (struct inode * dir, struct dentry *dentry)
303 	struct inode * inode = d_inode(dentry);
306 	if (ext2_empty_dir(inode)) {
309 			inode->i_size = 0;
310 			inode_dec_link_count(inode);
318 			struct inode * old_dir, struct dentry * old_dentry,
319 			struct inode * new_dir, struct dentry * new_dentry,
322 	struct inode * old_inode = d_inode(old_dentry);
323 	struct inode * new_inode = d_inode(new_dentry);