Man page 9 : ilookup5

ilookup5 - search for an inode in the inode cache

struct inode * ilookup5(struct super_block *  sb , unsigned long  hashval , int (* test ) (struct inode *, void *), void *  data );

sb
    super block of file system to search

hashval
    hash value (usually inode number) to search for

test
    callback used for comparisons between inodes

data
    opaque data pointer to pass to test

Search for the inode specified by hashval and data in the inode cache, and if the inode is in the cache, return the inode with an incremented reference count. Waits on I_NEW before returning the inode. returned with an incremented reference count.

This is a generalized version of ilookup for file systems where the inode number is not sufficient for unique identification of an inode.

test is called with the inode_hash_lock held, so canAqt sleep.