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7f97c7ea9a
As we start refactoring the code to break dependencies (see doc/refactoring.txt), I want us to use full paths in the includes (eg, #include "base/data-struct/list.h"). This makes it more obvious when we're breaking abstraction boundaries, eg, including a file in metadata/ from base/
115 lines
2.6 KiB
C
115 lines
2.6 KiB
C
/*
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* Copyright (C) 2004 Luca Berra
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* Copyright (C) 2004-2006 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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#include "lib/misc/lib.h"
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#include "lib/filters/filter.h"
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#ifdef __linux__
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#define MSG_SKIPPING "%s: Skipping md component device"
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static int _ignore_md(struct device *dev, int full)
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{
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int ret;
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if (!md_filtering())
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return 1;
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ret = dev_is_md(dev, NULL, full);
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if (ret == -EAGAIN) {
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/* let pass, call again after scan */
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dev->flags |= DEV_FILTER_AFTER_SCAN;
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log_debug_devs("filter md deferred %s", dev_name(dev));
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return 1;
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}
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if (ret == 1) {
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if (dev->ext.src == DEV_EXT_NONE)
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log_debug_devs(MSG_SKIPPING, dev_name(dev));
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else
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log_debug_devs(MSG_SKIPPING " [%s:%p]", dev_name(dev),
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dev_ext_name(dev), dev->ext.handle);
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return 0;
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}
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if (ret < 0) {
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log_debug_devs("%s: Skipping: error in md component detection",
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dev_name(dev));
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return 0;
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}
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return 1;
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}
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static int _ignore_md_lite(struct dev_filter *f __attribute__((unused)),
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struct device *dev)
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{
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return _ignore_md(dev, 0);
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}
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static int _ignore_md_full(struct dev_filter *f __attribute__((unused)),
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struct device *dev)
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{
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return _ignore_md(dev, 1);
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}
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static void _destroy(struct dev_filter *f)
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{
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if (f->use_count)
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log_error(INTERNAL_ERROR "Destroying md filter while in use %u times.", f->use_count);
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dm_free(f);
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}
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struct dev_filter *md_filter_create(struct cmd_context *cmd, struct dev_types *dt)
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{
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struct dev_filter *f;
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if (!(f = dm_zalloc(sizeof(*f)))) {
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log_error("md filter allocation failed");
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return NULL;
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}
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/*
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* FIXME: for commands that want a full md check (pvcreate, vgcreate,
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* vgextend), we do an extra read at the end of every device that the
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* filter looks at. This isn't necessary; we only need to do the full
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* md check on the PVs that these commands are trying to use.
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*/
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if (cmd->use_full_md_check)
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f->passes_filter = _ignore_md_full;
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else
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f->passes_filter = _ignore_md_lite;
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f->destroy = _destroy;
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f->use_count = 0;
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f->private = dt;
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log_debug_devs("MD filter initialised.");
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return f;
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}
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#else
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struct dev_filter *md_filter_create(struct dev_types *dt)
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{
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return NULL;
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}
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#endif
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