BMAP(9) The Linux VFS BMAP(9)NAMEbmap - find a block number in a fileSYNOPSISsector_t bmap(struct inode * inode, sector_t block);ARGUMENTSinode inode of file block block to findDESCRIPTIONReturns the block number on the device holding the inode that is the disk block number for the block of the file requested. That is, asked for block 4 of inode 1 the function will return the disk block relative to the disk start that holds that block of the file.COPYRIGHTKernel Hackers Manual 2.6. July 2010 BMAP(9)