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) BSD File Formats Manual DHCLIENT.LEASES(5)NAME
dhclient.leases -- DHCP client lease database
The Internet Software 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 occurrence.
The lease file is named dhclient.leases.IFNAME, where IFNAME represents the network interface the DHCP client acquired the lease on. For
example, if dhclient(8) is configured for the em0 network device, the lease file will be named dhclient.leases.em0.
The format of the lease declarations is described in dhclient.conf(5).
/var/db/dhclient.leases.IFNAME Current lease file.
SEE ALSO dhclient.conf(5), dhcp-options(5), dhcpd.conf(5), dhclient(8), dhcpd(8)
RFC 2132, RFC 2131.
The dhclient(8) utility was written by Ted Lemon <email@example.com> under a contract with Vixie Labs.
The current implementation was reworked by Henning Brauer <firstname.lastname@example.org>.
BSD January 1, 1997 BSD
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