Name
lock_may_read —
checks that the region is free of locks
Synopsis
int lock_may_read (struct inode * inode, loff_t start, unsigned long len);
Arguments
inode
the inode that is being read
start
the first byte to read
len
the number of bytes to read
Description
Emulates Windows locking requirements. Whole-file
mandatory locks (share modes) can prohibit a read and
byte-range POSIX locks can prohibit a read if they overlap.
N.B. this function is only ever called
from knfsd and ownership of locks is never checked.