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    Subject[PATCH 19/67] aufs sysfs interface and lifetime management, source
    Date
    From: Junjiro Okajima <hooanon05@yahoo.co.jp>

    initial commit
    aufs sysfs interface and lifetime management, source

    Signed-off-by: Junjiro Okajima <hooanon05@yahoo.co.jp>
    ---
    fs/aufs/sysaufs.c | 104 +++++++++++++++++++++++++++++++++++++++++++++++++++++
    1 files changed, 104 insertions(+), 0 deletions(-)

    diff --git a/fs/aufs/sysaufs.c b/fs/aufs/sysaufs.c
    new file mode 100644
    index 0000000..7df12fd
    --- /dev/null
    +++ b/fs/aufs/sysaufs.c
    @@ -0,0 +1,104 @@
    +/*
    + * Copyright (C) 2007-2008 Junjiro Okajima
    + *
    + * This program, aufs 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; either version 2 of the License, or
    + * (at your option) any later version.
    + *
    + * This program is distributed in the hope that it will 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 to the Free Software
    + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
    + */
    +
    +/*
    + * sysfs interface and lifetime management
    + * they are necessary regardless sysfs is disabled.
    + *
    + * $Id: sysaufs.c,v 1.4 2008/04/28 03:05:39 sfjro Exp $
    + */
    +
    +#include <linux/fs.h>
    +#include <linux/module.h>
    +#include <linux/sysfs.h>
    +#include "aufs.h"
    +
    +/* ---------------------------------------------------------------------- */
    +
    +/* super_blocks list is not exported */
    +DEFINE_MUTEX(au_sbilist_mtx);
    +LIST_HEAD(au_sbilist);
    +
    +/* ---------------------------------------------------------------------- */
    +
    +static struct kset au_kset;
    +
    +#define AuSbiAttr(_name) { \
    + .attr = { .name = __stringify(_name), .mode = 0444 }, \
    + .show = sysaufs_sbi_##_name, \
    +}
    +
    +static struct au_sbi_attr au_sbi_attr_xino = AuSbiAttr(xino);
    +struct attribute *au_sbi_attrs[] = {
    + &au_sbi_attr_xino.attr,
    + NULL,
    +};
    +
    +static struct sysfs_ops au_sbi_ops = {
    + .show = sysaufs_sbi_show
    +};
    +
    +static struct kobj_type au_sbi_ktype = {
    + .release = au_si_free,
    + .sysfs_ops = &au_sbi_ops,
    + .default_attrs = au_sbi_attrs,
    +};
    +
    +/* ---------------------------------------------------------------------- */
    +
    +int sysaufs_si_init(struct au_sbinfo *sbinfo)
    +{
    + int err;
    +
    + sbinfo->si_kobj.kset = &au_kset;
    + err = kobject_init_and_add(&sbinfo->si_kobj, &au_sbi_ktype,
    + NULL/*&au_kset.kobj*/,
    + SysaufsSb_PREFIX "%p", sbinfo);
    + AuTraceErr(err);
    + return err;
    +}
    +
    +
    +/* ---------------------------------------------------------------------- */
    +
    +void sysaufs_fin(void)
    +{
    + AuDebugOn(!list_empty(&au_sbilist));
    + sysfs_remove_group(&au_kset.kobj, au_attr_group);
    + kset_unregister(&au_kset);
    +}
    +
    +int __init sysaufs_init(void)
    +{
    + int err;
    +
    + sysaufs_brs_init();
    + au_kset.kobj.parent = fs_kobj;
    + kobject_set_name(&au_kset.kobj, AUFS_NAME);
    + au_kset.kobj.ktype = au_ktype;
    + err = kset_register(&au_kset);
    + if (unlikely(err))
    + goto out;
    + err = sysfs_create_group(&au_kset.kobj, au_attr_group);
    + if (unlikely(err))
    + kset_unregister(&au_kset);
    +
    + out:
    + AuTraceErr(err);
    + return err;
    +}
    --
    1.4.4.4


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