166 строки
3.8 KiB
C
166 строки
3.8 KiB
C
/*
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* Copyright (c) 2014 Red Hat, Inc.
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "xfs.h"
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#include "xfs_sysfs.h"
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#include "xfs_log_format.h"
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#include "xfs_log.h"
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#include "xfs_log_priv.h"
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struct xfs_sysfs_attr {
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struct attribute attr;
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ssize_t (*show)(char *buf, void *data);
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ssize_t (*store)(const char *buf, size_t count, void *data);
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};
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static inline struct xfs_sysfs_attr *
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to_attr(struct attribute *attr)
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{
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return container_of(attr, struct xfs_sysfs_attr, attr);
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}
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#define XFS_SYSFS_ATTR_RW(name) \
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static struct xfs_sysfs_attr xfs_sysfs_attr_##name = __ATTR_RW(name)
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#define XFS_SYSFS_ATTR_RO(name) \
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static struct xfs_sysfs_attr xfs_sysfs_attr_##name = __ATTR_RO(name)
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#define ATTR_LIST(name) &xfs_sysfs_attr_##name.attr
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/*
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* xfs_mount kobject. This currently has no attributes and thus no need for show
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* and store helpers. The mp kobject serves as the per-mount parent object that
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* is identified by the fsname under sysfs.
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*/
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struct kobj_type xfs_mp_ktype = {
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.release = xfs_sysfs_release,
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};
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/* xlog */
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STATIC ssize_t
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log_head_lsn_show(
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char *buf,
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void *data)
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{
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struct xlog *log = data;
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int cycle;
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int block;
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spin_lock(&log->l_icloglock);
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cycle = log->l_curr_cycle;
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block = log->l_curr_block;
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spin_unlock(&log->l_icloglock);
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return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, block);
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}
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XFS_SYSFS_ATTR_RO(log_head_lsn);
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STATIC ssize_t
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log_tail_lsn_show(
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char *buf,
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void *data)
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{
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struct xlog *log = data;
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int cycle;
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int block;
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xlog_crack_atomic_lsn(&log->l_tail_lsn, &cycle, &block);
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return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, block);
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}
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XFS_SYSFS_ATTR_RO(log_tail_lsn);
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STATIC ssize_t
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reserve_grant_head_show(
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char *buf,
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void *data)
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{
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struct xlog *log = data;
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int cycle;
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int bytes;
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xlog_crack_grant_head(&log->l_reserve_head.grant, &cycle, &bytes);
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return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, bytes);
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}
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XFS_SYSFS_ATTR_RO(reserve_grant_head);
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STATIC ssize_t
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write_grant_head_show(
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char *buf,
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void *data)
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{
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struct xlog *log = data;
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int cycle;
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int bytes;
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xlog_crack_grant_head(&log->l_write_head.grant, &cycle, &bytes);
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return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, bytes);
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}
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XFS_SYSFS_ATTR_RO(write_grant_head);
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static struct attribute *xfs_log_attrs[] = {
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ATTR_LIST(log_head_lsn),
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ATTR_LIST(log_tail_lsn),
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ATTR_LIST(reserve_grant_head),
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ATTR_LIST(write_grant_head),
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NULL,
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};
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static inline struct xlog *
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to_xlog(struct kobject *kobject)
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{
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struct xfs_kobj *kobj = to_kobj(kobject);
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return container_of(kobj, struct xlog, l_kobj);
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}
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STATIC ssize_t
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xfs_log_show(
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struct kobject *kobject,
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struct attribute *attr,
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char *buf)
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{
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struct xlog *log = to_xlog(kobject);
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struct xfs_sysfs_attr *xfs_attr = to_attr(attr);
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return xfs_attr->show ? xfs_attr->show(buf, log) : 0;
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}
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STATIC ssize_t
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xfs_log_store(
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struct kobject *kobject,
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struct attribute *attr,
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const char *buf,
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size_t count)
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{
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struct xlog *log = to_xlog(kobject);
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struct xfs_sysfs_attr *xfs_attr = to_attr(attr);
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return xfs_attr->store ? xfs_attr->store(buf, count, log) : 0;
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}
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static struct sysfs_ops xfs_log_ops = {
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.show = xfs_log_show,
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.store = xfs_log_store,
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};
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struct kobj_type xfs_log_ktype = {
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.release = xfs_sysfs_release,
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.sysfs_ops = &xfs_log_ops,
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.default_attrs = xfs_log_attrs,
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};
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