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lvm2/lib/filters/filter.h

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Misc structural changes.
2001-10-01 23:29:52 +04:00
/*
filters: check for mpath before opening devs 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.
2013-08-14 02:26:58 +04:00
* 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.
Misc structural changes.
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*
Update copyright notices.
2004-03-30 23:35:44 +04:00
* This file is part of LVM2.
Misc structural changes.
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*
Update copyright notices.
2004-03-30 23:35:44 +04:00
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
Fix inconsistent licence notices: executables are GPLv2; libraries LGPLv2.1.
2007-08-21 00:55:30 +04:00
* of the GNU Lesser General Public License v.2.1.
Misc structural changes.
2001-10-01 23:29:52 +04:00
*
Fix inconsistent licence notices: executables are GPLv2; libraries LGPLv2.1.
2007-08-21 00:55:30 +04:00
* You should have received a copy of the GNU Lesser General Public License
Update copyright notices.
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* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Misc structural changes.
2001-10-01 23:29:52 +04:00
*/
#ifndef _LVM_FILTER_H
#define _LVM_FILTER_H
refactor: make device type recognition code common for general use Changes: - move device type registration out of "type filter" (filter.c) to a separate and new dev-type.[ch] for common use throughout the code - the structure for keeping the major numbers detected for available device types and available partitioning available is stored in "dev_types" structure now - move common partitioning detection code to dev-type.[ch] as well together with other device-related functions bound to dev_types (see dev-type.h for the interface) The dev-type interface contains all common functions used to detect subsystems/device types, signature/superblock recognition code, type-specific device properties and other common device properties (bound to dev_types), including partitioning support. - add dev_types instance to cmd context as cmd->dev_types for common use - use cmd->dev_types throughout as a central point for providing information about device types
2013-06-12 14:08:56 +04:00
#include "dev-cache.h"
#include "dev-type.h"
New devices/types config file entry to add new types of block devices.
2002-12-03 19:20:38 +03:00
filters: check for mpath before opening devs 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.
2013-08-14 02:26:58 +04:00
struct dev_filter *composite_filter_create(int n, struct dev_filter **filters);
refactor: make device type recognition code common for general use Changes: - move device type registration out of "type filter" (filter.c) to a separate and new dev-type.[ch] for common use throughout the code - the structure for keeping the major numbers detected for available device types and available partitioning available is stored in "dev_types" structure now - move common partitioning detection code to dev-type.[ch] as well together with other device-related functions bound to dev_types (see dev-type.h for the interface) The dev-type interface contains all common functions used to detect subsystems/device types, signature/superblock recognition code, type-specific device properties and other common device properties (bound to dev_types), including partitioning support. - add dev_types instance to cmd context as cmd->dev_types for common use - use cmd->dev_types throughout as a central point for providing information about device types
2013-06-12 14:08:56 +04:00
struct dev_filter *lvm_type_filter_create(struct dev_types *dt);
filters: check for mpath before opening devs 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.
2013-08-14 02:26:58 +04:00
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);
Recognise DRBD device part and handle it similar to MD devices. The DRBD uses underlying device so code should prefer top device if duplicate is found. Patch also introduce dev_subsystem_part_major and dev_subsytem_name functions to easily handle all these replication susbystems and not hardcode md_major call. See https://bugzilla.redhat.com/show_bug.cgi?id=530881 for full problem description.
2009-10-27 20:00:44 +03:00
filters: check for mpath before opening devs 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.
2013-08-14 02:26:58 +04:00
/*
* 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 */
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