27 static int lock_parent(struct dentry *dentry,  in lock_parent()  argument
28 		       struct dentry **lower_dentry,  in lock_parent()
31 	struct dentry *lower_dir_dentry;  in lock_parent()
33 	lower_dir_dentry = ecryptfs_dentry_to_lower(dentry->d_parent);  in lock_parent()
35 	*lower_dentry = ecryptfs_dentry_to_lower(dentry);  in lock_parent()
117 static int ecryptfs_interpose(struct dentry *lower_dentry,  in ecryptfs_interpose()
118 			      struct dentry *dentry, struct super_block *sb)  in ecryptfs_interpose()  argument
124 	d_instantiate(dentry, inode);  in ecryptfs_interpose()
129 static int ecryptfs_do_unlink(struct inode *dir, struct dentry *dentry,  in ecryptfs_do_unlink()  argument
132 	struct dentry *lower_dentry;  in ecryptfs_do_unlink()
136 	rc = lock_parent(dentry, &lower_dentry, &lower_dir);  in ecryptfs_do_unlink()
156 		d_drop(dentry);  in ecryptfs_do_unlink()
174 		   struct dentry *ecryptfs_dentry, umode_t mode)  in ecryptfs_do_create()
177 	struct dentry *lower_dentry;  in ecryptfs_do_create()
212 int ecryptfs_initialize_file(struct dentry *ecryptfs_dentry,  in ecryptfs_initialize_file()
257 		struct inode *directory_inode, struct dentry *ecryptfs_dentry,  in ecryptfs_create()
285 static int ecryptfs_i_size_read(struct dentry *dentry, struct inode *inode)  in ecryptfs_i_size_read()  argument
290 	rc = ecryptfs_get_lower_file(dentry, inode);  in ecryptfs_i_size_read()
295 			dentry, rc);  in ecryptfs_i_size_read()
307 		rc = ecryptfs_read_and_validate_xattr_region(dentry, inode);  in ecryptfs_i_size_read()
319 static struct dentry *ecryptfs_lookup_interpose(struct dentry *dentry,  in ecryptfs_lookup_interpose()  argument
320 				     struct dentry *lower_dentry)  in ecryptfs_lookup_interpose()
322 	const struct path *path = ecryptfs_dentry_to_lower_path(dentry->d_parent);  in ecryptfs_lookup_interpose()
333 	fsstack_copy_attr_atime(d_inode(dentry->d_parent),  in ecryptfs_lookup_interpose()
334 				d_inode(path->dentry));  in ecryptfs_lookup_interpose()
337 	ecryptfs_set_dentry_private(dentry, dentry_info);  in ecryptfs_lookup_interpose()
339 	dentry_info->lower_path.dentry = lower_dentry;  in ecryptfs_lookup_interpose()
351 		d_add(dentry, NULL);  in ecryptfs_lookup_interpose()
354 	inode = __ecryptfs_get_inode(lower_inode, dentry->d_sb);  in ecryptfs_lookup_interpose()
361 		rc = ecryptfs_i_size_read(dentry, inode);  in ecryptfs_lookup_interpose()
370 	return d_splice_alias(inode, dentry);  in ecryptfs_lookup_interpose()
382 static struct dentry *ecryptfs_lookup(struct inode *ecryptfs_dir_inode,  in ecryptfs_lookup()
383 				      struct dentry *ecryptfs_dentry,  in ecryptfs_lookup()
388 	struct dentry *lower_dir_dentry, *lower_dentry;  in ecryptfs_lookup()
391 	struct dentry *res;  in ecryptfs_lookup()
424 static int ecryptfs_link(struct dentry *old_dentry, struct inode *dir,  in ecryptfs_link()
425 			 struct dentry *new_dentry)  in ecryptfs_link()
427 	struct dentry *lower_old_dentry;  in ecryptfs_link()
428 	struct dentry *lower_new_dentry;  in ecryptfs_link()
454 static int ecryptfs_unlink(struct inode *dir, struct dentry *dentry)  in ecryptfs_unlink()  argument
456 	return ecryptfs_do_unlink(dir, dentry, d_inode(dentry));  in ecryptfs_unlink()
460 			    struct inode *dir, struct dentry *dentry,  in ecryptfs_symlink()  argument
464 	struct dentry *lower_dentry;  in ecryptfs_symlink()
470 	rc = lock_parent(dentry, &lower_dentry, &lower_dir);  in ecryptfs_symlink()
486 	rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb);  in ecryptfs_symlink()
493 	if (d_really_is_negative(dentry))  in ecryptfs_symlink()
494 		d_drop(dentry);  in ecryptfs_symlink()
499 			  struct dentry *dentry, umode_t mode)  in ecryptfs_mkdir()  argument
502 	struct dentry *lower_dentry;  in ecryptfs_mkdir()
505 	rc = lock_parent(dentry, &lower_dentry, &lower_dir);  in ecryptfs_mkdir()
511 	rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb);  in ecryptfs_mkdir()
519 	if (d_really_is_negative(dentry))  in ecryptfs_mkdir()
520 		d_drop(dentry);  in ecryptfs_mkdir()
524 static int ecryptfs_rmdir(struct inode *dir, struct dentry *dentry)  in ecryptfs_rmdir()  argument
526 	struct dentry *lower_dentry;  in ecryptfs_rmdir()
530 	rc = lock_parent(dentry, &lower_dentry, &lower_dir);  in ecryptfs_rmdir()
539 		clear_nlink(d_inode(dentry));  in ecryptfs_rmdir()
546 		d_drop(dentry);  in ecryptfs_rmdir()
552 	       struct dentry *dentry, umode_t mode, dev_t dev)  in ecryptfs_mknod()  argument
555 	struct dentry *lower_dentry;  in ecryptfs_mknod()
558 	rc = lock_parent(dentry, &lower_dentry, &lower_dir);  in ecryptfs_mknod()
564 	rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb);  in ecryptfs_mknod()
571 	if (d_really_is_negative(dentry))  in ecryptfs_mknod()
572 		d_drop(dentry);  in ecryptfs_mknod()
578 		struct dentry *old_dentry, struct inode *new_dir,  in ecryptfs_rename()
579 		struct dentry *new_dentry, unsigned int flags)  in ecryptfs_rename()
582 	struct dentry *lower_old_dentry;  in ecryptfs_rename()
583 	struct dentry *lower_new_dentry;  in ecryptfs_rename()
584 	struct dentry *lower_old_dir_dentry;  in ecryptfs_rename()
585 	struct dentry *lower_new_dir_dentry;  in ecryptfs_rename()
586 	struct dentry *trap;  in ecryptfs_rename()
640 static char *ecryptfs_readlink_lower(struct dentry *dentry, size_t *bufsiz)  in ecryptfs_readlink_lower()  argument
643 	struct dentry *lower_dentry = ecryptfs_dentry_to_lower(dentry);  in ecryptfs_readlink_lower()
652 	rc = ecryptfs_decode_and_decrypt_filename(&buf, bufsiz, dentry->d_sb,  in ecryptfs_readlink_lower()
661 static const char *ecryptfs_get_link(struct dentry *dentry,  in ecryptfs_get_link()  argument
668 	if (!dentry)  in ecryptfs_get_link()
671 	buf = ecryptfs_readlink_lower(dentry, &len);  in ecryptfs_get_link()
674 	fsstack_copy_attr_atime(d_inode(dentry),  in ecryptfs_get_link()
675 				d_inode(ecryptfs_dentry_to_lower(dentry)));  in ecryptfs_get_link()
726 static int truncate_upper(struct dentry *dentry, struct iattr *ia,  in truncate_upper()  argument
730 	struct inode *inode = d_inode(dentry);  in truncate_upper()
740 	rc = ecryptfs_get_lower_file(dentry, inode);  in truncate_upper()
743 	crypt_stat = &ecryptfs_inode_to_private(d_inode(dentry))->crypt_stat;  in truncate_upper()
844 int ecryptfs_truncate(struct dentry *dentry, loff_t new_length)  in ecryptfs_truncate()  argument
850 	rc = ecryptfs_inode_newsize_ok(d_inode(dentry), new_length);  in ecryptfs_truncate()
854 	rc = truncate_upper(dentry, &ia, &lower_ia);  in ecryptfs_truncate()
856 		struct dentry *lower_dentry = ecryptfs_dentry_to_lower(dentry);  in ecryptfs_truncate()
888 			    struct dentry *dentry, struct iattr *ia)  in ecryptfs_setattr()  argument
891 	struct dentry *lower_dentry;  in ecryptfs_setattr()
897 	crypt_stat = &ecryptfs_inode_to_private(d_inode(dentry))->crypt_stat;  in ecryptfs_setattr()
903 	inode = d_inode(dentry);  in ecryptfs_setattr()
905 	lower_dentry = ecryptfs_dentry_to_lower(dentry);  in ecryptfs_setattr()
907 	if (d_is_dir(dentry))  in ecryptfs_setattr()
909 	else if (d_is_reg(dentry)  in ecryptfs_setattr()
915 			dentry->d_sb)->mount_crypt_stat;  in ecryptfs_setattr()
916 		rc = ecryptfs_get_lower_file(dentry, inode);  in ecryptfs_setattr()
921 		rc = ecryptfs_read_metadata(dentry);  in ecryptfs_setattr()
942 	rc = setattr_prepare(&nop_mnt_idmap, dentry, ia);  in ecryptfs_setattr()
955 		rc = truncate_upper(dentry, ia, &lower_ia);  in ecryptfs_setattr()
979 	struct dentry *dentry = path->dentry;  in ecryptfs_getattr_link()  local
984 						dentry->d_sb)->mount_crypt_stat;  in ecryptfs_getattr_link()
985 	generic_fillattr(&nop_mnt_idmap, request_mask, d_inode(dentry), stat);  in ecryptfs_getattr_link()
990 		target = ecryptfs_readlink_lower(dentry, &targetsiz);  in ecryptfs_getattr_link()
1005 	struct dentry *dentry = path->dentry;  in ecryptfs_getattr()  local
1009 	rc = vfs_getattr(ecryptfs_dentry_to_lower_path(dentry), &lower_stat,  in ecryptfs_getattr()
1012 		fsstack_copy_attr_all(d_inode(dentry),  in ecryptfs_getattr()
1013 				      ecryptfs_inode_to_lower(d_inode(dentry)));  in ecryptfs_getattr()
1015 				 d_inode(dentry), stat);  in ecryptfs_getattr()
1022 ecryptfs_setxattr(struct dentry *dentry, struct inode *inode,  in ecryptfs_setxattr()  argument
1027 	struct dentry *lower_dentry;  in ecryptfs_setxattr()
1030 	lower_dentry = ecryptfs_dentry_to_lower(dentry);  in ecryptfs_setxattr()
1046 ecryptfs_getxattr_lower(struct dentry *lower_dentry, struct inode *lower_inode,  in ecryptfs_getxattr_lower()
1063 ecryptfs_getxattr(struct dentry *dentry, struct inode *inode,  in ecryptfs_getxattr()  argument
1066 	return ecryptfs_getxattr_lower(ecryptfs_dentry_to_lower(dentry),  in ecryptfs_getxattr()
1072 ecryptfs_listxattr(struct dentry *dentry, char *list, size_t size)  in ecryptfs_listxattr()  argument
1075 	struct dentry *lower_dentry;  in ecryptfs_listxattr()
1077 	lower_dentry = ecryptfs_dentry_to_lower(dentry);  in ecryptfs_listxattr()
1089 static int ecryptfs_removexattr(struct dentry *dentry, struct inode *inode,  in ecryptfs_removexattr()  argument
1093 	struct dentry *lower_dentry;  in ecryptfs_removexattr()
1096 	lower_dentry = ecryptfs_dentry_to_lower(dentry);  in ecryptfs_removexattr()
1109 static int ecryptfs_fileattr_get(struct dentry *dentry, struct fileattr *fa)  in ecryptfs_fileattr_get()  argument
1111 	return vfs_fileattr_get(ecryptfs_dentry_to_lower(dentry), fa);  in ecryptfs_fileattr_get()
1115 				 struct dentry *dentry, struct fileattr *fa)  in ecryptfs_fileattr_set()  argument
1117 	struct dentry *lower_dentry = ecryptfs_dentry_to_lower(dentry);  in ecryptfs_fileattr_set()
1121 	fsstack_copy_attr_all(d_inode(dentry), d_inode(lower_dentry));  in ecryptfs_fileattr_set()
1127 					  struct dentry *dentry, int type)  in ecryptfs_get_acl()  argument
1129 	return vfs_get_acl(idmap, ecryptfs_dentry_to_lower(dentry),  in ecryptfs_get_acl()
1134 			    struct dentry *dentry, struct posix_acl *acl,  in ecryptfs_set_acl()  argument
1138 	struct dentry *lower_dentry = ecryptfs_dentry_to_lower(dentry);  in ecryptfs_set_acl()
1144 		fsstack_copy_attr_all(d_inode(dentry), lower_inode);  in ecryptfs_set_acl()
1187 			      struct dentry *dentry, struct inode *inode,  in ecryptfs_xattr_get()  argument
1190 	return ecryptfs_getxattr(dentry, inode, name, buffer, size);  in ecryptfs_xattr_get()
1195 			      struct dentry *dentry, struct inode *inode,  in ecryptfs_xattr_set()  argument
1200 		return ecryptfs_setxattr(dentry, inode, name, value, size, flags);  in ecryptfs_xattr_set()
1203 		return ecryptfs_removexattr(dentry, inode, name);  in ecryptfs_xattr_set()