LOCK_MAY_READ(9) The Linux VFS LOCK_MAY_READ(9)
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.
COPYRIGHT
Kernel Hackers Manual 2.6. July 2010 LOCK_MAY_READ(9)
