lock_may_read man page on Oracle

lock_may_read man page on Oracle

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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 3.8.	   June 2014		      LOCK_MAY_READ(9)

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