vfs_setlease — sets a lease on an open file
int vfs_setlease ( | struct file * filp, |
| long arg, | |
struct file_lock ** lease); |
Call this to establish a lease on the file. The (*lease)->fl_lmops->fl_break operation must be set; if not, break_lease will oops!
This will call the filesystem's setlease file method, if
defined. Note that there is no getlease method; instead, the
filesystem setlease method should call back to setlease to
add a lease to the inode's lease list, where fcntl_getlease can
find it. Since fcntl_getlease only reports whether the current
task holds a lease, a cluster filesystem need only do this for
leases held by processes on this node.
There is also no break_lease method; filesystems that handle their own leases should break leases themselves from the filesystem's open, create, and (on truncate) setattr methods.