lock_may_read

Langue: en

Autres versions - même langue

Version: June 2009 (debian - 07/07/09)

Section: 9 (Appels noyau Linux)

Sommaire

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.