1VFS_TEST_LOCK(9)                 The Linux VFS                VFS_TEST_LOCK(9)
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NAME

6       vfs_test_lock - test file byte range lock
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SYNOPSIS

9       int vfs_test_lock(struct file * filp, struct file_lock * fl);
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ARGUMENTS

12       filp
13           The file to test lock for
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15       fl
16           The lock to test; also used to hold result
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DESCRIPTION

19       Returns -ERRNO on failure. Indicates presence of conflicting lock by
20       setting conf->fl_type to something other than F_UNLCK.
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23Kernel Hackers Manual 2.6.         June 2019                  VFS_TEST_LOCK(9)
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