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filters: check for mpath before opening devs

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Split out the partitioned device filter that needs to open the device
and move the multipath filter in front of it.

When a device is multipathed, sending I/O to the underlying paths may
cause problems, the most obvious being I/O errors visible to lvm if a
path is down.

Revert the incorrect <backtrace> messages added when a device doesn't
pass a filter.

Log each filter initialisation to show sequence.

Avoid duplicate 'Using $device' debug messages.
This commit is contained in:
Alasdair G Kergon
2013-08-13 23:26:58 +01:00
parent 0da72743ca
commit 80bcdb93ff
21 changed files with 159 additions and 227 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
lib/filters/filter-composite.c
View File

@ -14,7 +14,7 @@
*/
#include "lib.h"
#include "filter-composite.h"
#include "filter.h"
static int _and_p(struct dev_filter *f, struct device *dev)
{
@ -22,9 +22,7 @@ static int _and_p(struct dev_filter *f, struct device *dev)
for (filters = (struct dev_filter **) f->private; *filters; ++filters)
if (!(*filters)->passes_filter(*filters, dev))
return_0;
log_debug_devs("Using %s", dev_name(dev));
return 0; /* No 'stack': a filter, not an error. */
return 1;
}
@ -92,5 +90,7 @@ struct dev_filter *composite_filter_create(int n, struct dev_filter **filters)
cft->use_count = 0;
cft->private = filters_copy;
log_debug_devs("Composite filter initialised.");
return cft;
}

23
lib/filters/filter-composite.h
View File

@ -1,23 +0,0 @@
/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _LVM_FILTER_COMPOSITE_H
#define _LVM_FILTER_COMPOSITE_H
#include "dev-cache.h"
struct dev_filter *composite_filter_create(int n, struct dev_filter **filters);
#endif

4
lib/filters/filter-md.c
View File

@ -14,7 +14,7 @@
*/
#include "lib.h"
#include "filter-md.h"
#include "filter.h"
#ifdef linux
@ -64,6 +64,8 @@ struct dev_filter *md_filter_create(struct dev_types *dt)
f->use_count = 0;
f->private = dt;
log_debug_devs("MD filter initialised.");
return f;
}

24
lib/filters/filter-md.h
View File

@ -1,24 +0,0 @@
/*
* Copyright (C) 2004 Luca Berra
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _LVM_FILTER_MD_H
#define _LVM_FILTER_MD_H
#include "dev-cache.h"
#include "dev-type.h"
struct dev_filter *md_filter_create(struct dev_types *dt);
#endif

4
lib/filters/filter-mpath.c
View File

@ -13,7 +13,7 @@
*/
#include "lib.h"
#include "filter-mpath.h"
#include "filter.h"
#include "activate.h"
#ifdef linux
@ -228,6 +228,8 @@ struct dev_filter *mpath_filter_create(struct dev_types *dt)
f->use_count = 0;
f->private = dt;
log_debug_devs("mpath filter initialised.");
return f;
}

24
lib/filters/filter-mpath.h
View File

@ -1,24 +0,0 @@
/*
* Copyright (C) 2011 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _LVM_FILTER_MPATH_H
#define _LVM_FILTER_MPATH_H
#include "dev-cache.h"
#include "dev-type.h"
struct dev_filter *mpath_filter_create(struct dev_types *dt);
#endif

83
lib/filters/filter-partitioned.c Normal file
View File

@ -0,0 +1,83 @@
/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2012 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "lib.h"
#include "filter.h"
static int _passes_partitioned_filter(struct dev_filter *f, struct device *dev)
{
struct dev_types *dt = (struct dev_types *) f->private;
const char *name = dev_name(dev);
int ret = 0;
uint64_t size;
/* Check it's accessible */
if (!dev_open_readonly_quiet(dev)) {
log_debug_devs("%s: Skipping: open failed", name);
return 0;
}
/* Check it's not too small */
if (!dev_get_size(dev, &size)) {
log_debug_devs("%s: Skipping: dev_get_size failed", name);
goto out;
}
if (size < pv_min_size()) {
log_debug_devs("%s: Skipping: Too small to hold a PV", name);
goto out;
}
if (dev_is_partitioned(dt, dev)) {
log_debug_devs("%s: Skipping: Partition table signature found",
name);
goto out;
}
ret = 1;
out:
if (!dev_close(dev))
stack;
return ret;
}
static void _partitioned_filter_destroy(struct dev_filter *f)
{
if (f->use_count)
log_error(INTERNAL_ERROR "Destroying partitioned filter while in use %u times.", f->use_count);
dm_free(f);
}
struct dev_filter *partitioned_filter_create(struct dev_types *dt)
{
struct dev_filter *f;
if (!(f = dm_zalloc(sizeof(struct dev_filter)))) {
log_error("Partitioned filter allocation failed");
return NULL;
}
f->passes_filter = _passes_partitioned_filter;
f->destroy = _partitioned_filter_destroy;
f->use_count = 0;
f->private = dt;
log_debug_devs("Partitioned filter initialised.");
return f;
}

4
lib/filters/filter-persistent.c
View File

@ -14,7 +14,7 @@
*/
#include "lib.h"
#include "filter-persistent.h"
#include "filter.h"
#include "config.h"
#include "lvm-file.h"
#include "activate.h"
@ -366,6 +366,8 @@ struct dev_filter *persistent_filter_create(struct dev_types *dt,
f->wipe = _persistent_filter_wipe;
f->dump = _persistent_filter_dump;
log_debug_devs("Persistent filter initialised.");
return f;
bad:

28
lib/filters/filter-persistent.h
View File

@ -1,28 +0,0 @@
/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2006 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _LVM_FILTER_PERSISTENT_H
#define _LVM_FILTER_PERSISTENT_H
#include "dev-cache.h"
#include "dev-type.h"
struct dev_filter *persistent_filter_create(struct dev_types *dt,
struct dev_filter *f,
const char *file);
int persistent_filter_load(struct dev_filter *f, struct dm_config_tree **cft_out);
#endif

5
lib/filters/filter-regex.c
View File

@ -14,7 +14,7 @@
*/
#include "lib.h"
#include "filter-regex.h"
#include "filter.h"
struct rfilter {
struct dm_pool *mem;
@ -212,6 +212,9 @@ struct dev_filter *regex_filter_create(const struct dm_config_value *patterns)
f->destroy = _regex_destroy;
f->use_count = 0;
f->private = rf;
log_debug_devs("Regex filter initialised.");
return f;
bad:

31
lib/filters/filter-regex.h
View File

@ -1,31 +0,0 @@
/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _LVM_FILTER_REGEX_H
#define _LVM_FILTER_REGEX_H
#include "dev-cache.h"
/*
* patterns must be an array of strings of the form:
* [ra]<sep><regex><sep>, eg,
* r/cdrom/ - reject cdroms
* a|loop/[0-4]| - accept loops 0 to 4
* r|.*| - reject everything else
*/
struct dev_filter *regex_filter_create(const struct dm_config_value *patterns);
#endif

5
lib/filters/filter-sysfs.c
View File

@ -13,7 +13,7 @@
*/
#include "lib.h"
#include "filter-sysfs.h"
#include "filter.h"
#ifdef linux
@ -324,6 +324,9 @@ struct dev_filter *sysfs_filter_create(void)
f->destroy = _destroy;
f->use_count = 0;
f->private = ds;
log_debug_devs("Sysfs filter initialised.");
return f;
bad:

22
lib/filters/filter-sysfs.h
View File

@ -1,22 +0,0 @@
/*
* Copyright (C) 2004 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _LVM_FILTER_SYSFS_H
#define _LVM_FILTER_SYSFS_H
#include "dev-cache.h"
struct dev_filter *sysfs_filter_create(void);
#endif

35
lib/filters/filter.c → lib/filters/filter-type.c
View File

@ -20,8 +20,6 @@ static int _passes_lvm_type_device_filter(struct dev_filter *f, struct device *d
{
struct dev_types *dt = (struct dev_types *) f->private;
const char *name = dev_name(dev);
int ret = 0;
uint64_t size;
/* Is this a recognised device type? */
if (!dt->dev_type_array[MAJOR(dev->dev)].max_partitions) {
@ -30,36 +28,7 @@ static int _passes_lvm_type_device_filter(struct dev_filter *f, struct device *d
return 0;
}
/* Check it's accessible */
if (!dev_open_readonly_quiet(dev)) {
log_debug_devs("%s: Skipping: open failed", name);
return 0;
}
/* Check it's not too small */
if (!dev_get_size(dev, &size)) {
log_debug_devs("%s: Skipping: dev_get_size failed", name);
goto out;
}
if (size < pv_min_size()) {
log_debug_devs("%s: Skipping: Too small to hold a PV", name);
goto out;
}
if (dev_is_partitioned(dt, dev)) {
log_debug_devs("%s: Skipping: Partition table signature found",
name);
goto out;
}
ret = 1;
out:
if (!dev_close(dev))
stack;
return ret;
return 1;
}
static void _lvm_type_filter_destroy(struct dev_filter *f)
@ -84,5 +53,7 @@ struct dev_filter *lvm_type_filter_create(struct dev_types *dt)
f->use_count = 0;
f->private = dt;
log_debug_devs("LVM type filter initialised.");
return f;
}

27
lib/filters/filter.h
View File

@ -1,6 +1,7 @@
/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004 Luca Berra
* Copyright (C) 2004-2013 Red Hat, Inc. All rights reserved.
*
* This file is part of LVM2.
*
@ -19,6 +20,26 @@
#include "dev-cache.h"
#include "dev-type.h"
struct dev_filter *composite_filter_create(int n, struct dev_filter **filters);
struct dev_filter *lvm_type_filter_create(struct dev_types *dt);
struct dev_filter *md_filter_create(struct dev_types *dt);
struct dev_filter *mpath_filter_create(struct dev_types *dt);
struct dev_filter *partitioned_filter_create(struct dev_types *dt);
struct dev_filter *persistent_filter_create(struct dev_types *dt,
struct dev_filter *f,
const char *file);
struct dev_filter *sysfs_filter_create(void);
#endif
/*
* patterns must be an array of strings of the form:
* [ra]<sep><regex><sep>, eg,
* r/cdrom/ - reject cdroms
* a|loop/[0-4]| - accept loops 0 to 4
* r|.*| - reject everything else
*/
struct dev_filter *regex_filter_create(const struct dm_config_value *patterns);
int persistent_filter_load(struct dev_filter *f, struct dm_config_tree **cft_out);
#endif /* _LVM_FILTER_H */