ATA_FINALIZE_PORT_OP(9) libata Core Internals ATA_FINALIZE_PORT_OP(9)NAME
ata_finalize_port_ops - finalize ata_port_operations
SYNOPSIS
void ata_finalize_port_ops(struct ata_port_operations * ops);
ARGUMENTS
ops
ata_port_operations to finalize
DESCRIPTION
An ata_port_operations can inherit from another ops and that ops can again inherit from another. This can go on as many times as necessary
as long as there is no loop in the inheritance chain.
Ops tables are finalized when the host is started. NULL or unspecified entries are inherited from the closet ancestor which has the method
and the entry is populated with it. After finalization, the ops table directly points to all the methods and ->inherits is no longer
necessary and cleared.
Using ATA_OP_NULL, inheriting ops can force a method to NULL.
LOCKING
None.
AUTHOR
Jeff Garzik
Author.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 ATA_FINALIZE_PORT_OP(9)
Check Out this Related Man Page
QUOTAON(8) BSD System Manager's Manual QUOTAON(8)NAME
quotaon, quotaoff -- turn filesystem quotas on and off
SYNOPSIS
quotaon [-g] [-u] [-v] filesystem ...
quotaon [-g] [-u] [-v] -a
quotaoff [-g] [-u] [-v] filesystem ...
quotaoff [-g] [-u] [-v] -a
DESCRIPTION
Quotaon announces to the system that disk quotas should be enabled on one or more filesystems. Quotaoff announces to the system that the
specified filesystems should have disk quotas turned off. The filesystem must be mounted and it must have the appropriate mount option file
located at its root, the .quota.ops.user file for user quota configuration, and the .quota.ops.group file for group quota configuration.
Quotaon also expects each filesystem to have the appropriate quota data files located at its root, the .quota.user file for user data, and
the .quota.group file for group data. These filenames and their root location cannot be overridden. By default, quotaon will attempt to
enable both user and group quotas. By default, quotaoff will disable both user and group quotas.
Available options:
-a If the -a flag is supplied in place of any filesystem names, quotaon/quotaoff will enable/disable any filesystems with an existing
mount option file at its root. The mount option file specifies the types of quotas that are to be configured.
-g Only group quotas will be enabled/disabled. The mount option file, .quota.ops.group, must exist at the root of the filesystem.
-u Only user quotas will be enabled/disabled. The mount option file, .quota.ops.user, must exist at the root of the filesystem.
-v Causes quotaon and quotaoff to print a message for each filesystem where quotas are turned on or off.
Specifying both -g and -u is equivalent to the default.
Quotas for both users and groups will automatically be turned on at filesystem mount if the appropriate mount option file and binary data
file is in place at its root.
FILES
Each of the following quota files is located at the root of the mounted filesystem. The mount option files are empty files whose existence
indicates that quotas are to be enabled for that filesystem.
.quota.user data file containing user quotas
.quota.group data file containing group quotas
.quota.ops.user mount option file used to enable user quotas
.quota.ops.group mount option file used to enable group quotas
SEE ALSO quota(1), quotactl(2), edquota(8), quotacheck(8), repquota(8)HISTORY
The quotaon command appeared in 4.2BSD.
4.2 Berkeley Distribution October 17, 2002 4.2 Berkeley Distribution
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