baff4e44b9
Embed a kobject into the xfs log data structure (xlog). This creates a 'log' subdirectory for every XFS mount instance in sysfs. The lifecycle of the log kobject is tied to the lifecycle of the log. Also define a set of generic attribute handlers associated with the log kobject in preparation for the addition of attributes. Signed-off-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
102 lines
2.6 KiB
C
102 lines
2.6 KiB
C
/*
|
|
* Copyright (c) 2014 Red Hat, Inc.
|
|
* All Rights Reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it would be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write the Free Software Foundation,
|
|
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "xfs.h"
|
|
#include "xfs_sysfs.h"
|
|
#include "xfs_log_format.h"
|
|
#include "xfs_log.h"
|
|
#include "xfs_log_priv.h"
|
|
|
|
struct xfs_sysfs_attr {
|
|
struct attribute attr;
|
|
ssize_t (*show)(char *buf, void *data);
|
|
ssize_t (*store)(const char *buf, size_t count, void *data);
|
|
};
|
|
|
|
static inline struct xfs_sysfs_attr *
|
|
to_attr(struct attribute *attr)
|
|
{
|
|
return container_of(attr, struct xfs_sysfs_attr, attr);
|
|
}
|
|
|
|
#define XFS_SYSFS_ATTR_RW(name) \
|
|
static struct xfs_sysfs_attr xfs_sysfs_attr_##name = __ATTR_RW(name)
|
|
#define XFS_SYSFS_ATTR_RO(name) \
|
|
static struct xfs_sysfs_attr xfs_sysfs_attr_##name = __ATTR_RO(name)
|
|
|
|
#define ATTR_LIST(name) &xfs_sysfs_attr_##name.attr
|
|
|
|
/*
|
|
* xfs_mount kobject. This currently has no attributes and thus no need for show
|
|
* and store helpers. The mp kobject serves as the per-mount parent object that
|
|
* is identified by the fsname under sysfs.
|
|
*/
|
|
|
|
struct kobj_type xfs_mp_ktype = {
|
|
.release = xfs_sysfs_release,
|
|
};
|
|
|
|
/* xlog */
|
|
|
|
static struct attribute *xfs_log_attrs[] = {
|
|
NULL,
|
|
};
|
|
|
|
static inline struct xlog *
|
|
to_xlog(struct kobject *kobject)
|
|
{
|
|
struct xfs_kobj *kobj = to_kobj(kobject);
|
|
return container_of(kobj, struct xlog, l_kobj);
|
|
}
|
|
|
|
STATIC ssize_t
|
|
xfs_log_show(
|
|
struct kobject *kobject,
|
|
struct attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct xlog *log = to_xlog(kobject);
|
|
struct xfs_sysfs_attr *xfs_attr = to_attr(attr);
|
|
|
|
return xfs_attr->show ? xfs_attr->show(buf, log) : 0;
|
|
}
|
|
|
|
STATIC ssize_t
|
|
xfs_log_store(
|
|
struct kobject *kobject,
|
|
struct attribute *attr,
|
|
const char *buf,
|
|
size_t count)
|
|
{
|
|
struct xlog *log = to_xlog(kobject);
|
|
struct xfs_sysfs_attr *xfs_attr = to_attr(attr);
|
|
|
|
return xfs_attr->store ? xfs_attr->store(buf, count, log) : 0;
|
|
}
|
|
|
|
static struct sysfs_ops xfs_log_ops = {
|
|
.show = xfs_log_show,
|
|
.store = xfs_log_store,
|
|
};
|
|
|
|
struct kobj_type xfs_log_ktype = {
|
|
.release = xfs_sysfs_release,
|
|
.sysfs_ops = &xfs_log_ops,
|
|
.default_attrs = xfs_log_attrs,
|
|
};
|