VFS_SETLEASE(9) The Linux VFS VFS_SETLEASE(9)NAME
vfs_setlease - sets a lease on an open file
int vfs_setlease(struct file * filp, long arg, struct file_lock ** lease);
type of lease to obtain
file_lock to use
Call this to establish a lease on the file. The (*lease)->fl_lmops->lm_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.
the only current setlease methods exist only to disable leases in certain cases. More vfs changes may be required to allow a full
filesystem lease implementation.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 VFS_SETLEASE(9)
Check Out this Related Man Page
dhclient.leases(5) File Formats Manual dhclient.leases(5)NAME
dhclient.leases - DHCP client lease database
The Internet Systems Consortium DHCP client keeps a persistent database of leases that it has acquired that are still valid. The database
is a free-form ASCII file containing one valid declaration per lease. If more than one declaration appears for a given lease, the last
one in the file is used. The file is written as a log, so this is not an unusual occurrance.
The format of the lease declarations is described in dhclient.conf(5).
SEE ALSO dhclient(8), dhcp-options(5), dhclient.conf(5), dhcpd(8), dhcpd.conf(5), RFC2132, RFC2131.
AUTHOR dhclient(8) was written by Ted Lemon under a contract with Vixie Labs. Funding for this project was provided by Internet Systems Consor-
tium. Information about Internet Systems Consortium can be found at https://www.isc.org.
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