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Filters are still applied before any device reading or the label scan, but any filter checks that want to read the device are skipped and the device is flagged. After bcache is populated, but before lvm looks for devices (i.e. before label scan), the filters are reapplied to the devices that were flagged above. The filters will then find the data they need in bcache.
60 lines
2.1 KiB
C
60 lines
2.1 KiB
C
/*
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* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
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* Copyright (C) 2004 Luca Berra
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* Copyright (C) 2004-2013 Red Hat, Inc. All rights reserved.
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*
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* This file is part of LVM2.
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*
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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU Lesser General Public License v.2.1.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef _LVM_FILTER_H
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#define _LVM_FILTER_H
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#include "dev-cache.h"
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#include "dev-type.h"
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struct dev_filter *composite_filter_create(int n, int use_dev_ext_info, struct dev_filter **filters);
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struct dev_filter *lvm_type_filter_create(struct dev_types *dt);
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struct dev_filter *md_filter_create(struct cmd_context *cmd, struct dev_types *dt);
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struct dev_filter *fwraid_filter_create(struct dev_types *dt);
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struct dev_filter *mpath_filter_create(struct dev_types *dt);
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struct dev_filter *partitioned_filter_create(struct dev_types *dt);
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struct dev_filter *persistent_filter_create(struct dev_types *dt,
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struct dev_filter *f,
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const char *file);
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struct dev_filter *sysfs_filter_create(void);
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struct dev_filter *signature_filter_create(struct dev_types *dt);
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struct dev_filter *internal_filter_create(void);
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int internal_filter_allow(struct dm_pool *mem, struct device *dev);
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void internal_filter_clear(void);
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/*
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* patterns must be an array of strings of the form:
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* [ra]<sep><regex><sep>, eg,
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* r/cdrom/ - reject cdroms
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* a|loop/[0-4]| - accept loops 0 to 4
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* r|.*| - reject everything else
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*/
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struct dev_filter *regex_filter_create(const struct dm_config_value *patterns);
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typedef enum {
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FILTER_MODE_NO_LVMETAD,
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FILTER_MODE_PRE_LVMETAD,
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FILTER_MODE_POST_LVMETAD
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} filter_mode_t;
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struct dev_filter *usable_filter_create(struct dev_types *dt, filter_mode_t mode);
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int persistent_filter_load(struct dev_filter *f, struct dm_config_tree **cft_out);
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#endif /* _LVM_FILTER_H */
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