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414f903cdc
lvm2/tools/commands.h
David Teigland b4402bd821 exported vg handling 
The exported VG checking/enforcement was scattered and
inconsistent.  This centralizes it and makes it consistent,
following the existing approach for foreign and shared
VGs/PVs, which are very similar to exported VGs/PVs.

The access policy that now applies to foreign/shared/exported
VGs/PVs, is that if a foreign/shared/exported VG/PV is named
on the command line (i.e. explicitly requested by the user),
and the command is not permitted to operate on it because it
is foreign/shared/exported, then an access error is reported
and the command exits with an error.  But, if the command is
processing all VGs/PVs, and happens to come across a
foreign/shared/exported VG/PV (that is not explicitly named on
the command line), then the command silently skips it and does
not produce an error.

A command using tags or --select handles inaccessible VGs/PVs
the same way as a command processing all VGs/PVs, and will
not report/return errors if these inaccessible VGs/PVs exist.

The new policy fixes the exit codes on a somewhat random set of
commands that previously exited with an error if they were
looking at all VGs/PVs and an exported VG existed on the system.

There should be no change to which commands are allowed/disallowed
on exported VGs/PVs.

Certain LV commands (lvs/lvdisplay/lvscan) would previously not
display LVs from an exported VG (for unknown reasons).  This has
not changed.  The lvm fullreport command would previously report
info about an exported VG but not about the LVs in it.  This
has changed to include all info from the exported VG.
2019-06-25 15:39:08 -05:00

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/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2014 Red Hat, Inc. All rights reserved.
*
* This file is part of LVM2.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU Lesser General Public License v.2.1.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
xx(config,
"Display and manipulate configuration information",
PERMITTED_READ_ONLY | NO_METADATA_PROCESSING)
xx(devtypes,
"Display recognised built-in block device types",
PERMITTED_READ_ONLY | NO_METADATA_PROCESSING)
xx(dumpconfig,
"Display and manipulate configuration information",
PERMITTED_READ_ONLY | NO_METADATA_PROCESSING)
xx(formats,
"List available metadata formats",
PERMITTED_READ_ONLY | NO_METADATA_PROCESSING)
xx(help,
"Display help for commands",
PERMITTED_READ_ONLY | NO_METADATA_PROCESSING)
xx(fullreport,
"Display full report",
PERMITTED_READ_ONLY | ALL_VGS_IS_DEFAULT | LOCKD_VG_SH | ALLOW_HINTS | ALLOW_EXPORTED)
xx(lastlog,
"Display last command's log report",
PERMITTED_READ_ONLY | NO_METADATA_PROCESSING)
xx(lvchange,
"Change the attributes of logical volume(s)",
PERMITTED_READ_ONLY | ALLOW_HINTS)
xx(lvconvert,
"Change logical volume layout",
GET_VGNAME_FROM_OPTIONS)
xx(lvcreate,
"Create a logical volume",
ALLOW_HINTS)
xx(lvdisplay,
"Display information about a logical volume",
PERMITTED_READ_ONLY | ALL_VGS_IS_DEFAULT | LOCKD_VG_SH | CAN_USE_ONE_SCAN | ALLOW_HINTS)
xx(lvextend,
"Add space to a logical volume",
ALLOW_HINTS)
xx(lvmchange,
"With the device mapper, this is obsolete and does nothing.",
0)
xx(lvmconfig,
"Display and manipulate configuration information",
PERMITTED_READ_ONLY | NO_METADATA_PROCESSING)
xx(lvmdiskscan,
"List devices that may be used as physical volumes",
PERMITTED_READ_ONLY | ENABLE_ALL_DEVS | ALLOW_EXPORTED)
xx(lvmsadc,
"Collect activity data",
0)
xx(lvmsar,
"Create activity report",
0)
xx(lvreduce,
"Reduce the size of a logical volume",
ALLOW_HINTS)
xx(lvremove,
"Remove logical volume(s) from the system",
ALL_VGS_IS_DEFAULT | ALLOW_HINTS) /* all VGs only with --select */
xx(lvrename,
"Rename a logical volume",
ALLOW_HINTS)
xx(lvresize,
"Resize a logical volume",
ALLOW_HINTS)
xx(lvs,
"Display information about logical volumes",
PERMITTED_READ_ONLY | ALL_VGS_IS_DEFAULT | LOCKD_VG_SH | CAN_USE_ONE_SCAN | ALLOW_HINTS)
xx(lvscan,
"List all logical volumes in all volume groups",
PERMITTED_READ_ONLY | ALL_VGS_IS_DEFAULT | LOCKD_VG_SH)
xx(pvchange,
"Change attributes of physical volume(s)",
0)
xx(pvresize,
"Resize physical volume(s)",
0)
xx(pvck,
"Check metadata on physical volumes",
LOCKD_VG_SH | ALLOW_EXPORTED)
xx(pvcreate,
"Initialize physical volume(s) for use by LVM",
ENABLE_ALL_DEVS)
xx(pvdata,
"Display the on-disk metadata for physical volume(s)",
0)
xx(pvdisplay,
"Display various attributes of physical volume(s)",
PERMITTED_READ_ONLY | ENABLE_ALL_DEVS | ENABLE_DUPLICATE_DEVS | LOCKD_VG_SH | CAN_USE_ONE_SCAN | ALLOW_HINTS | ALLOW_EXPORTED)
/* ALL_VGS_IS_DEFAULT is for polldaemon to find pvmoves in-progress using process_each_vg. */
xx(pvmove,
"Move extents from one physical volume to another",
ALL_VGS_IS_DEFAULT | DISALLOW_TAG_ARGS)
xx(lvpoll,
"Continue already initiated poll operation on a logical volume",
ALLOW_HINTS)
xx(pvremove,
"Remove LVM label(s) from physical volume(s)",
ENABLE_ALL_DEVS)
xx(pvs,
"Display information about physical volumes",
PERMITTED_READ_ONLY | ALL_VGS_IS_DEFAULT | ENABLE_ALL_DEVS | ENABLE_DUPLICATE_DEVS | LOCKD_VG_SH | CAN_USE_ONE_SCAN | ALLOW_HINTS | ALLOW_EXPORTED)
xx(pvscan,
"List all physical volumes",
PERMITTED_READ_ONLY | LOCKD_VG_SH | ALLOW_EXPORTED)
xx(segtypes,
"List available segment types",
PERMITTED_READ_ONLY | NO_METADATA_PROCESSING)
xx(systemid,
"Display the system ID, if any, currently set on this host",
PERMITTED_READ_ONLY | NO_METADATA_PROCESSING)
xx(tags,
"List tags defined on this host",
PERMITTED_READ_ONLY | NO_METADATA_PROCESSING)
xx(vgcfgbackup,
"Backup volume group configuration(s)",
PERMITTED_READ_ONLY | ALL_VGS_IS_DEFAULT | LOCKD_VG_SH | ALLOW_EXPORTED)
xx(vgcfgrestore,
"Restore volume group configuration",
ALLOW_EXPORTED)
xx(vgchange,
"Change volume group attributes",
PERMITTED_READ_ONLY | ALL_VGS_IS_DEFAULT | ALLOW_HINTS)
xx(vgck,
"Check the consistency of volume group(s)",
ALL_VGS_IS_DEFAULT | LOCKD_VG_SH)
xx(vgconvert,
"Change volume group metadata format",
0)
xx(vgcreate,
"Create a volume group",
MUST_USE_ALL_ARGS | ENABLE_ALL_DEVS)
xx(vgdisplay,
"Display volume group information",
PERMITTED_READ_ONLY | ALL_VGS_IS_DEFAULT | LOCKD_VG_SH | CAN_USE_ONE_SCAN | ALLOW_HINTS | ALLOW_EXPORTED)
xx(vgexport,
"Unregister volume group(s) from the system",
ALL_VGS_IS_DEFAULT)
xx(vgextend,
"Add physical volumes to a volume group",
MUST_USE_ALL_ARGS | ENABLE_ALL_DEVS)
xx(vgimport,
"Register exported volume group with system",
ALL_VGS_IS_DEFAULT | ALLOW_EXPORTED)
xx(vgimportclone,
"Import a VG from cloned PVs",
ALLOW_EXPORTED)
xx(vgmerge,
"Merge volume groups",
0)
xx(vgmknodes,
"Create the special files for volume group devices in /dev",
ALL_VGS_IS_DEFAULT)
xx(vgreduce,
"Remove physical volume(s) from a volume group",
0)
xx(vgremove,
"Remove volume group(s)",
ALL_VGS_IS_DEFAULT) /* all VGs only with select */
xx(vgrename,
"Rename a volume group",
ALLOW_UUID_AS_NAME | ALLOW_EXPORTED)
xx(vgs,
"Display information about volume groups",
PERMITTED_READ_ONLY | ALL_VGS_IS_DEFAULT | LOCKD_VG_SH | CAN_USE_ONE_SCAN | ALLOW_HINTS | ALLOW_EXPORTED)
xx(vgscan,
"Search for all volume groups",
PERMITTED_READ_ONLY | ALL_VGS_IS_DEFAULT | LOCKD_VG_SH | ALLOW_EXPORTED)
xx(vgsplit,
"Move physical volumes into a new or existing volume group",
0)
xx(version,
"Display software and driver version information",
PERMITTED_READ_ONLY | NO_METADATA_PROCESSING)
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