posix_lock_file - Apply a POSIX-style lock to a file
2. SYNOPSIS ▲
int posix_lock_file(struct file * filp , struct file_lock * fl , struct file_lock * conflock );
3. ARGUMENTS ▲
The file to apply the lock to
The lock to be applied
Place to return a copy of the conflicting lock, if found.
4. 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.
5. COPYRIGHT ▲