iunique(9) centos man page | unix.com

IUNIQUE(9)							   The Linux VFS							IUNIQUE(9)

NAME
       iunique - get a unique inode number

SYNOPSIS
       ino_t iunique(struct super_block * sb, ino_t max_reserved);

ARGUMENTS
       sb
	   superblock

       max_reserved
	   highest reserved inode number

DESCRIPTION
       Obtain an inode number that is unique on the system for a given superblock. This is used by file systems that have no natural permanent
       inode numbering system. An inode number is returned that is higher than the reserved limit but unique.

BUGS
       With a large number of inodes live on the file system this function currently becomes quite slow.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014								IUNIQUE(9)