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Allow to activate snapshot

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Add extra code to active and deactivate related
snapshots and origin when user specifies snapshot
logical volume as lvchange parameter.

Before patch:

$> lvs -a
  LV    VG   Attr     LSize  Pool Origin Snap%  Move Log Copy%  Convert
  lvol0 mvg  owi-a-s-  1.00k
  lvol1 mvg  swi-a-s- 16.00k      lvol0    0.00
  lvol2 mvg  swi-a-s- 16.00k      lvol0    0.00

$> lvchange -an mvg/lvol2; echo $?
  Can't change snapshot logical volume "lvol2".
5

After patch:

$> lvchange -an mvg/lvol2
Change of snapshot lvol2 will also change its origin lvol0 and 1 other
snapshot(s). Proceed? [y/n]: n
  Logical volume lvol2 not changed.

$> lvchange -y -an mvg/lvol2; echo $?
0

$> lvs -a
  LV    VG   Attr     LSize  Pool Origin Snap%  Move Log Copy%  Convert
  lvol0 mvg  owi---s-  1.00k
  lvol1 mvg  swi---s- 16.00k      lvol0
  lvol2 mvg  swi---s- 16.00k      lvol0
This commit is contained in:
Zdenek Kabelac 2011-11-18 19:22:49 +00:00
parent e858ac1546
commit e8a40f6571
2 changed files with 24 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
WHATS_NEW
View File

@ -1,6 +1,7 @@
Version 2.02.89 - Version 2.02.89 -
================================== ==================================
Skip non-virtual origins for availability change for lvchange. Allow changing availability state of snapshots.
Skip non-virtual snapshots for availability change for lvchange with vg name.
Adjusted mirror region size only for mirrors and raids. Adjusted mirror region size only for mirrors and raids.
Reorder prompt conditions for removal of active volumes. Reorder prompt conditions for removal of active volumes.
Avoid 'mda inconsistency' by properly registering UNLABELLED_PV flag (2.02.86). Avoid 'mda inconsistency' by properly registering UNLABELLED_PV flag (2.02.86).

27
tools/lvchange.c
View File

@ -1,6 +1,6 @@
/* /*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved. * Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved. * Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved.
* *
* This file is part of LVM2. * This file is part of LVM2.
* *
@ -125,6 +125,9 @@ static int lvchange_availability(struct cmd_context *cmd,
activate = arg_uint_value(cmd, available_ARG, 0); activate = arg_uint_value(cmd, available_ARG, 0);
if (lv_is_cow(lv) && !lv_is_virtual_origin(origin_from_cow(lv)))
lv = origin_from_cow(lv);
if (activate == CHANGE_ALN) { if (activate == CHANGE_ALN) {
log_verbose("Deactivating logical volume \"%s\" locally", log_verbose("Deactivating logical volume \"%s\" locally",
lv->name); lv->name);
@ -515,6 +518,7 @@ static int lvchange_single(struct cmd_context *cmd, struct logical_volume *lv,
int doit = 0, docmds = 0; int doit = 0, docmds = 0;
int dmeventd_mode, archived = 0; int dmeventd_mode, archived = 0;
struct logical_volume *origin; struct logical_volume *origin;
char snaps_msg[128];
if (!(lv->vg->status & LVM_WRITE) && if (!(lv->vg->status & LVM_WRITE) &&
(arg_count(cmd, contiguous_ARG) || arg_count(cmd, permission_ARG) || (arg_count(cmd, contiguous_ARG) || arg_count(cmd, permission_ARG) ||
@ -534,11 +538,24 @@ static int lvchange_single(struct cmd_context *cmd, struct logical_volume *lv,
return ECMD_FAILED; return ECMD_FAILED;
} }
if (lv_is_cow(lv) && !lv_is_virtual_origin(origin_from_cow(lv)) && if (lv_is_cow(lv) && !lv_is_virtual_origin(origin = origin_from_cow(lv)) &&
arg_count(cmd, available_ARG)) { arg_count(cmd, available_ARG)) {
log_error("Can't change snapshot logical volume \"%s\"", if (origin->origin_count < 2)
lv->name); snaps_msg[0] = '\0';
return ECMD_FAILED; else if (dm_snprintf(snaps_msg, sizeof(snaps_msg),
" and %u other snapshot(s)",
origin->origin_count - 1) < 0) {
log_error("Failed to prepare message.");
return ECMD_FAILED;
}
if (!arg_count(cmd, yes_ARG) &&
(yes_no_prompt("Change of snapshot %s will also change its"
" origin %s%s. Proceed? [y/n]: ", lv->name,
origin->name, snaps_msg) == 'n')) {
log_error("Logical volume %s not changed.", lv->name);
return ECMD_FAILED;
}
} }
if (lv->status & PVMOVE) { if (lv->status & PVMOVE) {