VFS_TEST_LOCK(9) The Linux VFS VFS_TEST_LOCK(9)NAMEvfs_test_lock - test file byte range lock
SYNOPSIS
int vfs_test_lock(struct file * filp, struct file_lock * fl);
ARGUMENTS
filp
The file to test lock for
fl
The lock to test; also used to hold result
DESCRIPTION
Returns -ERRNO on failure. Indicates presence of conflicting lock by
setting conf->fl_type to something other than F_UNLCK.
COPYRIGHTKernel Hackers Manual 2.6. November 2013 VFS_TEST_LOCK(9)