vfs_setlease — sets a lease on an open file
int vfs_setlease ( | struct file * filp, |
| long arg, | |
| struct file_lock ** lease, | |
void ** priv); |
struct file * filpfile pointer
long argtype of lease to obtain
struct file_lock ** leasefile_lock to use when adding a lease
void ** privprivate info for lm_setup when adding a lease (may be NULL if lm_setup doesn't require it)
Call this to establish a lease on the file. The “lease” argument is not used for F_UNLCK requests and may be NULL. For commands that set or alter an existing lease, the (*lease)->fl_lmops->lm_break operation must be set; if not, this function will return -ENOLCK (and generate a scary-looking stack trace).
The “priv” pointer is passed directly to the lm_setup function as-is. It may be NULL if the lm_setup operation doesn't require it.