SYNOPSIS
- int posix_lock_file(struct file * filp, struct file_lock * fl, struct file_lock * conflock);
ARGUMENTS
filp
-
- The file to apply the lock to
fl
- The lock to be applied
conflock
- Place to return a copy of the conflicting lock, if found.
DESCRIPTION
Add a POSIX style lock to a file. We merge adjacent & overlapping locks whenever possible. POSIX locks are sorted by owner task, then by starting address
Note that if called with an FL_EXISTS argument, the caller may determine whether or not a lock was successfully freed by testing the return value for -ENOENT.
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