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filter-mpath: use new 'udev' external device info source to get mpath component status

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mpath components are marked in udev db as:
  ID_FS_TYPE="mpath_member"
or
  DM_MULTIPATH_DEVICE_PATH="1"

(it depends on udev rule/blkid version used for handling mpath)
This commit is contained in:
Peter Rajnoha 2014-09-03 15:48:37 +02:00
parent 590fbd8961
commit 9c030e81a4
1 changed files with 46 additions and 2 deletions
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48
lib/filters/filter-mpath.c
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@ -15,6 +15,9 @@
#include "lib.h"
#include "filter.h"
#include "activate.h"
#ifdef UDEV_SYNC_SUPPORT
#include <libudev.h>
#endif
#ifdef __linux__
@ -141,7 +144,33 @@ static int _get_parent_mpath(const char *dir, char *name, int max_size)
return r;
}
static int _dev_is_mpath(struct dev_filter *f, struct device *dev)
#ifdef UDEV_SYNC_SUPPORT
static int _udev_dev_is_mpath(struct device *dev)
{
const char *value;
struct dev_ext *ext;
if (!(ext = dev_ext_get(dev)))
return_0;
value = udev_device_get_property_value((struct udev_device *)ext->handle, "ID_FS_TYPE");
if (value && !strcmp(value, "mpath_member"))
return 1;
value = udev_device_get_property_value((struct udev_device *)ext->handle, "DM_MULTIPATH_DEVICE_PATH");
if (value && !strcmp(value, "1"))
return 1;
return 0;
}
#else
static int _udev_dev_is_mpath(struct device *dev)
{
return 0;
}
#endif
static int _native_dev_is_mpath(struct dev_filter *f, struct device *dev)
{
struct dev_types *dt = (struct dev_types *) f->private;
const char *part_name, *name;
@ -200,10 +229,25 @@ static int _dev_is_mpath(struct dev_filter *f, struct device *dev)
return lvm_dm_prefix_check(major, minor, MPATH_PREFIX);
}
static int _dev_is_mpath(struct dev_filter *f, struct device *dev)
{
if (dev->ext.src == DEV_EXT_NONE)
return _native_dev_is_mpath(f, dev);
if (dev->ext.src == DEV_EXT_UDEV)
return _udev_dev_is_mpath(dev);
log_error(INTERNAL_ERROR "Missing hook for mpath recognition "
"using external device info source %s", dev_ext_name(dev));
return 0;
}
static int _ignore_mpath(struct dev_filter *f, struct device *dev)
{
if (_dev_is_mpath(f, dev) == 1) {
log_debug_devs("%s: Skipping mpath component device", dev_name(dev));
log_debug_devs("%s: Skipping mpath component device [%s:%p]",
dev_name(dev), dev_ext_name(dev), dev->ext.handle);
return 0;
}