linux/fs/anon_inodes.c

13 #include <linux/file.h>
33  * User space expects anonymous inodes to have no file type in st_mode.
134 static struct file *__anon_inode_getfile(const char *name,
141 	struct file *file;
150 			file = ERR_CAST(inode);
156 			file = ERR_PTR(-ENODEV);
166 	file = alloc_file_pseudo(inode, anon_inode_mnt, name,
168 	if (IS_ERR(file))
171 	file->f_mapping = inode->i_mapping;
173 	file->private_data = priv;
175 	return file;
181 	return file;
185  * anon_inode_getfile - creates a new file instance by hooking it up to an
187  *                      of the file
189  * @name:    [in]    name of the "class" of the new file
190  * @fops:    [in]    file operations for the new file
191  * @priv:    [in]    private data for the new file (will be file's private_data)
194  * Creates a new file by hooking it on a single inode. This is useful for files
197  * hence saving memory and avoiding code duplication for the file/inode/dentry
198  * setup.  Returns the newly created file* or an error pointer.
200 struct file *anon_inode_getfile(const char *name,
209  * anon_inode_getfile_fmode - creates a new file instance by hooking it up to an
211  *                      of the file
213  * @name:    [in]    name of the "class" of the new file
214  * @fops:    [in]    file operations for the new file
215  * @priv:    [in]    private data for the new file (will be file's private_data)
219  * Creates a new file by hooking it on a single inode. This is useful for files
222  * hence saving memory and avoiding code duplication for the file/inode/dentry
223  * setup. Allows setting the fmode. Returns the newly created file* or an error
226 struct file *anon_inode_getfile_fmode(const char *name,
230 	struct file *file;
232 	file = __anon_inode_getfile(name, fops, priv, flags, NULL, false);
233 	if (!IS_ERR(file))
234 		file->f_mode |= f_mode;
236 	return file;
246  * @name:    [in]    name of the "class" of the new file
247  * @fops:    [in]    file operations for the new file
248  * @priv:    [in]    private data for the new file (will be file's private_data)
253  * Create a new anonymous inode and file pair.  This can be done for two
265  * Returns the newly created file* or an error pointer.
267 struct file *anon_inode_create_getfile(const char *name,
284 	struct file *file;
291 	file = __anon_inode_getfile(name, fops, priv, flags, context_inode,
293 	if (IS_ERR(file)) {
294 		error = PTR_ERR(file);
297 	fd_install(fd, file);
307  * anon_inode_getfd - creates a new file instance by hooking it up to
309  *                    the "class" of the file
311  * @name:    [in]    name of the "class" of the new file
312  * @fops:    [in]    file operations for the new file
313  * @priv:    [in]    private data for the new file (will be file's private_data)
316  * Creates a new file by hooking it on a single inode. This is
320  * memory use and avoiding code duplication for the file/inode/dentry
321  * setup.  Returns a newly created file descriptor or an error code.
335  * @name:    [in]    name of the "class" of the new file
336  * @fops:    [in]    file operations for the new file
337  * @priv:    [in]    private data for the new file (will be file's private_data)
342  * Create a new anonymous inode and file pair.  This can be done for two
354  * Returns a newly created file descriptor or an error code.