POSIX_LOCK_FILE(9) The Linux VFS POSIX_LOCK_FILE(9)
NAME
posix_lock_file - Apply a POSIX-style lock to a file
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.
COPYRIGHT
Kernel Hackers Manual 2.6. July 2010 POSIX_LOCK_FILE(9)
