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Remove NON_BLOCKING lock flag from tools and set a policy to auto-set.

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As a simplification to the tools and further liblvm, this patch pushes
the setting of NON_BLOCKING lock flag inside the lock_vol() call.
The policy we set is if any existing VGs are currently locked, we
set the NON_BLOCKING flag.

Should be no functional change.
This commit is contained in:
Dave Wysochanski 2009-05-13 13:02:52 +00:00
parent 5a945afdc6
commit d52b3fd3fe
10 changed files with 22 additions and 13 deletions
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1
WHATS_NEW
View File

@ -1,5 +1,6 @@
Version 2.02.46 -
================================
Remove NON_BLOCKING lock flag from tools and set a policy to auto-set.
Remove snapshot_count from VG and use function instead.
Fix first_seg() call for empty segment list.
Add make install_lvm2 as complement to device-mapper install.

8
lib/locking/locking.c
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@ -376,6 +376,14 @@ int lock_vol(struct cmd_context *cmd, const char *vol, uint32_t flags)
switch (flags & LCK_SCOPE_MASK) {
case LCK_VG:
/*
* Automatically set LCK_NONBLOCK if one or more VGs locked.
* This will enforce correctness and prevent deadlocks rather
* than relying on the caller to set the flag properly.
*/
if (vgs_locked())
flags |= LCK_NONBLOCK;
/* Lock VG to change on-disk metadata. */
/* If LVM1 driver knows about the VG, it can't be accessed. */
if (!check_lvm1_vg_inactive(cmd, vol))

4
tools/vgcfgrestore.c
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@ -1,6 +1,6 @@
/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
* Copyright (C) 2004-2009 Red Hat, Inc. All rights reserved.
*
* This file is part of LVM2.
*
@ -48,7 +48,7 @@ int vgcfgrestore(struct cmd_context *cmd, int argc, char **argv)
return ECMD_FAILED;
}
if (!lock_vol(cmd, vg_name, LCK_VG_WRITE | LCK_NONBLOCK)) {
if (!lock_vol(cmd, vg_name, LCK_VG_WRITE)) {
log_error("Unable to lock volume group %s", vg_name);
unlock_vg(cmd, VG_ORPHANS);
return ECMD_FAILED;

4
tools/vgcreate.c
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@ -1,6 +1,6 @@
/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
* Copyright (C) 2004-2009 Red Hat, Inc. All rights reserved.
*
* This file is part of LVM2.
*
@ -51,7 +51,7 @@ int vgcreate(struct cmd_context *cmd, int argc, char **argv)
return ECMD_FAILED;
}
if (!lock_vol(cmd, vp_new.vg_name, LCK_VG_WRITE | LCK_NONBLOCK)) {
if (!lock_vol(cmd, vp_new.vg_name, LCK_VG_WRITE)) {
log_error("Can't get lock for %s", vp_new.vg_name);
unlock_vg(cmd, VG_ORPHANS);
return ECMD_FAILED;

4
tools/vgextend.c
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@ -1,6 +1,6 @@
/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
* Copyright (C) 2004-2009 Red Hat, Inc. All rights reserved.
*
* This file is part of LVM2.
*
@ -42,7 +42,7 @@ int vgextend(struct cmd_context *cmd, int argc, char **argv)
}
log_verbose("Checking for volume group \"%s\"", vg_name);
if (!(vg = vg_lock_and_read(cmd, vg_name, NULL, LCK_VG_WRITE | LCK_NONBLOCK,
if (!(vg = vg_lock_and_read(cmd, vg_name, NULL, LCK_VG_WRITE,
CLUSTERED | EXPORTED_VG |
LVM_WRITE | RESIZEABLE_VG,
CORRECT_INCONSISTENT | FAIL_INCONSISTENT))) {

4
tools/vgmerge.c
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@ -1,6 +1,6 @@
/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
* Copyright (C) 2004-2009 Red Hat, Inc. All rights reserved.
*
* This file is part of LVM2.
*
@ -35,7 +35,7 @@ static int _vgmerge_single(struct cmd_context *cmd, const char *vg_name_to,
log_verbose("Checking for volume group \"%s\"", vg_name_from);
if (!(vg_from = vg_lock_and_read(cmd, vg_name_from, NULL,
LCK_VG_WRITE | LCK_NONBLOCK,
LCK_VG_WRITE,
CLUSTERED | EXPORTED_VG | LVM_WRITE,
CORRECT_INCONSISTENT | FAIL_INCONSISTENT))) {
unlock_release_vg(cmd, vg_to, vg_name_to);

2
tools/vgreduce.c
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@ -397,7 +397,7 @@ static int _vgreduce_single(struct cmd_context *cmd, struct volume_group *vg,
return ECMD_FAILED;
}
if (!lock_vol(cmd, VG_ORPHANS, LCK_VG_WRITE | LCK_NONBLOCK)) {
if (!lock_vol(cmd, VG_ORPHANS, LCK_VG_WRITE)) {
log_error("Can't get lock for orphan PVs");
return ECMD_FAILED;
}

4
tools/vgremove.c
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@ -1,6 +1,6 @@
/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
* Copyright (C) 2004-2009 Red Hat, Inc. All rights reserved.
*
* This file is part of LVM2.
*
@ -41,7 +41,7 @@ int vgremove(struct cmd_context *cmd, int argc, char **argv)
}
ret = process_each_vg(cmd, argc, argv,
LCK_VG_WRITE | LCK_NONBLOCK, 1,
LCK_VG_WRITE, 1,
NULL, &vgremove_single);
unlock_vg(cmd, VG_ORPHANS);

2
tools/vgrename.c
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@ -100,7 +100,7 @@ static int vg_rename_path(struct cmd_context *cmd, const char *old_vg_path,
log_verbose("Checking for new volume group \"%s\"", vg_name_new);
if (!lock_vol(cmd, vg_name_new, LCK_VG_WRITE | LCK_NONBLOCK)) {
if (!lock_vol(cmd, vg_name_new, LCK_VG_WRITE)) {
unlock_release_vg(cmd, vg, vg_name_old);
log_error("Can't get lock for %s", vg_name_new);
return 0;

2
tools/vgsplit.c
View File

@ -325,7 +325,7 @@ int vgsplit(struct cmd_context *cmd, int argc, char **argv)
return ECMD_FAILED;
log_verbose("Checking for new volume group \"%s\"", vg_name_to);
if (!lock_vol(cmd, vg_name_to, LCK_VG_WRITE | LCK_NONBLOCK)) {
if (!lock_vol(cmd, vg_name_to, LCK_VG_WRITE)) {
log_error("Can't get lock for %s", vg_name_to);
unlock_release_vg(cmd, vg_from, vg_name_from);
return ECMD_FAILED;