start address within vm_mm

parent dir name

file name

the address of buf in user space

how long the cached information is assumed to be valid. We need to revalidate the cached attrs for this inode if jiffies - read_cache_jiffies > attrtimeo.

when we started read-caching this inode

inode number

device identifier

cache related bit mask flag

the first byte after end address within vm_mm

vm flags