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68d13b2517
When lvm2 command works with clvmd and uses locking in wrong way, it may 'leak' certain file descriptors in opened (incorrect) state. dev_cache_exit then destroys memory pool of cached devices, while _open_devices list in dev-io.c was still referencing them if they were still opened. Patch properly calls _close() function to 'self-heal' from this invalid state, but it will report internal error (so execution with abort_on_internal_error causes immediate death). On the normal 'execution', error is only reported, but memory state is corrected, and linked list is not referencing devices from released mempool. For crash see: https://bugzilla.redhat.com/show_bug.cgi?id=1073886
67 lines
1.9 KiB
C
67 lines
1.9 KiB
C
/*
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* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
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* Copyright (C) 2004-2007 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _LVM_DEV_CACHE_H
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#define _LVM_DEV_CACHE_H
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#include "device.h"
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#include "lvm-wrappers.h"
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/*
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* predicate for devices.
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*/
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struct dev_filter {
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int (*passes_filter) (struct dev_filter * f, struct device * dev);
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void (*destroy) (struct dev_filter * f);
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void (*wipe) (struct dev_filter * f);
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int (*dump) (struct dev_filter * f, int merge_existing);
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void *private;
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unsigned use_count;
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};
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/*
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* The global device cache.
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*/
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struct cmd_context;
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int dev_cache_init(struct cmd_context *cmd);
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int dev_cache_check_for_open_devices(void);
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int dev_cache_exit(void);
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/* Trigger(1) or avoid(0) a scan */
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void dev_cache_scan(int do_scan);
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int dev_cache_has_scanned(void);
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int dev_cache_add_dir(const char *path);
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int dev_cache_add_loopfile(const char *path);
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__attribute__((nonnull(1)))
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struct device *dev_cache_get(const char *name, struct dev_filter *f);
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// TODO
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struct device *dev_cache_get_by_devt(dev_t device, struct dev_filter *f);
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void dev_set_preferred_name(struct str_list *sl, struct device *dev);
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/*
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* Object for iterating through the cache.
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*/
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struct dev_iter;
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struct dev_iter *dev_iter_create(struct dev_filter *f, int dev_scan);
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void dev_iter_destroy(struct dev_iter *iter);
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struct device *dev_iter_get(struct dev_iter *iter);
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void dev_reset_error_count(struct cmd_context *cmd);
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#endif
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