1 // SPDX-License-Identifier: GPL-2.0-or-later
5  * Copyright (C) 1997-2004 Erez Zadok
6  * Copyright (C) 2001-2004 Stony Brook University
7  * Copyright (C) 2004-2007 International Business Machines Corp.
26  * doesn't give us a chance to update the atime of the lower layer
28  * updates the atime of the lower level inode if generic_file_read
37 	struct file *file = iocb->ki_filp;  in ecryptfs_read_update_atime()
41 		path = ecryptfs_dentry_to_lower_path(file->f_path.dentry);  in ecryptfs_read_update_atime()
51  * doesn't give us a chance to update the atime of the lower layer inode.  This
53  * lower level inode if generic_file_read returns without any errors. This is
66 		path = ecryptfs_dentry_to_lower_path(in->f_path.dentry);  in ecryptfs_splice_read_update_atime()
92 	buf->filldir_called++;  in ecryptfs_filldir()
94 						   buf->sb, lower_name,  in ecryptfs_filldir()
97 		if (err != -EINVAL) {  in ecryptfs_filldir()
104 		/* Mask -EINVAL errors as these are most likely due a plaintext  in ecryptfs_filldir()
105 		 * filename present in the lower filesystem despite filename  in ecryptfs_filldir()
113 	buf->caller->pos = buf->ctx.pos;  in ecryptfs_filldir()
114 	res = dir_emit(buf->caller, name, name_size, ino, d_type);  in ecryptfs_filldir()
117 		buf->entries_written++;  in ecryptfs_filldir()
134 		.sb = inode->i_sb,  in ecryptfs_readdir()
138 	ctx->pos = buf.ctx.pos;  in ecryptfs_readdir()
153 	crypt_stat = &ecryptfs_inode_to_private(inode)->crypt_stat;  in read_or_initialize_metadata()
155 						inode->i_sb)->mount_crypt_stat;  in read_or_initialize_metadata()
156 	mutex_lock(&crypt_stat->cs_mutex);  in read_or_initialize_metadata()
158 	if (crypt_stat->flags & ECRYPTFS_POLICY_APPLIED &&  in read_or_initialize_metadata()
159 	    crypt_stat->flags & ECRYPTFS_KEY_VALID) {  in read_or_initialize_metadata()
168 	if (mount_crypt_stat->flags & ECRYPTFS_PLAINTEXT_PASSTHROUGH_ENABLED) {  in read_or_initialize_metadata()
169 		crypt_stat->flags &= ~(ECRYPTFS_I_SIZE_INITIALIZED  in read_or_initialize_metadata()
175 	if (!(mount_crypt_stat->flags & ECRYPTFS_XATTR_METADATA_ENABLED) &&  in read_or_initialize_metadata()
182 	rc = -EIO;  in read_or_initialize_metadata()
184 	mutex_unlock(&crypt_stat->cs_mutex);  in read_or_initialize_metadata()
196 	if (!lower_file->f_op->mmap)  in ecryptfs_mmap()
197 		return -ENODEV;  in ecryptfs_mmap()
208  * Returns zero on success; non-zero otherwise
214 	struct dentry *ecryptfs_dentry = file->f_path.dentry;  in ecryptfs_open()
225 		rc = -ENOMEM;  in ecryptfs_open()
228 	crypt_stat = &ecryptfs_inode_to_private(inode)->crypt_stat;  in ecryptfs_open()
229 	mutex_lock(&crypt_stat->cs_mutex);  in ecryptfs_open()
230 	if (!(crypt_stat->flags & ECRYPTFS_POLICY_APPLIED)) {  in ecryptfs_open()
233 		crypt_stat->flags |= (ECRYPTFS_POLICY_APPLIED  in ecryptfs_open()
236 	mutex_unlock(&crypt_stat->cs_mutex);  in ecryptfs_open()
240 			"the lower file for the dentry with name "  in ecryptfs_open()
245 	if ((ecryptfs_inode_to_private(inode)->lower_file->f_flags & O_ACCMODE)  in ecryptfs_open()
246 	    == O_RDONLY && (file->f_flags & O_ACCMODE) != O_RDONLY) {  in ecryptfs_open()
247 		rc = -EPERM;  in ecryptfs_open()
248 		printk(KERN_WARNING "%s: Lower file is RO; eCryptfs "  in ecryptfs_open()
253 		file, ecryptfs_inode_to_private(inode)->lower_file);  in ecryptfs_open()
258 			"[0x%.16lx] size: [0x%.16llx]\n", inode, inode->i_ino,  in ecryptfs_open()
277  * Returns zero on success; non-zero otherwise
281 	struct dentry *ecryptfs_dentry = file->f_path.dentry;  in ecryptfs_dir_open()
293 		return -ENOMEM;  in ecryptfs_dir_open()
296 				 file->f_flags, current_cred());  in ecryptfs_dir_open()
299 			"the lower file for the dentry with name "  in ecryptfs_dir_open()
313 	if (lower_file->f_op->flush) {  in ecryptfs_flush()
314 		filemap_write_and_wait(file->f_mapping);  in ecryptfs_flush()
315 		return lower_file->f_op->flush(lower_file, td);  in ecryptfs_flush()
360 	if (lower_file->f_op->fasync)  in ecryptfs_fasync()
361 		rc = lower_file->f_op->fasync(fd, lower_file, flag);  in ecryptfs_fasync()
369 	long rc = -ENOTTY;  in ecryptfs_unlocked_ioctl()
371 	if (!lower_file->f_op->unlocked_ioctl)  in ecryptfs_unlocked_ioctl()
375 	case FITRIM:  in ecryptfs_unlocked_ioctl()
376 	case FS_IOC_GETFLAGS:  in ecryptfs_unlocked_ioctl()
377 	case FS_IOC_SETFLAGS:  in ecryptfs_unlocked_ioctl()
378 	case FS_IOC_GETVERSION:  in ecryptfs_unlocked_ioctl()
379 	case FS_IOC_SETVERSION:  in ecryptfs_unlocked_ioctl()
380 		rc = lower_file->f_op->unlocked_ioctl(lower_file, cmd, arg);  in ecryptfs_unlocked_ioctl()
394 	long rc = -ENOIOCTLCMD;  in ecryptfs_compat_ioctl()
396 	if (!lower_file->f_op->compat_ioctl)  in ecryptfs_compat_ioctl()
400 	case FITRIM:  in ecryptfs_compat_ioctl()
401 	case FS_IOC32_GETFLAGS:  in ecryptfs_compat_ioctl()
402 	case FS_IOC32_SETFLAGS:  in ecryptfs_compat_ioctl()
403 	case FS_IOC32_GETVERSION:  in ecryptfs_compat_ioctl()
404 	case FS_IOC32_SETVERSION:  in ecryptfs_compat_ioctl()
405 		rc = lower_file->f_op->compat_ioctl(lower_file, cmd, arg);  in ecryptfs_compat_ioctl()