90 lines
2.5 KiB
C
90 lines
2.5 KiB
C
/*
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* Copyright (C) 2007 Oracle. 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
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* License v2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will 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 GNU
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* 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
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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*/
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <linux/completion.h>
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#include <linux/buffer_head.h>
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#include <linux/kobject.h>
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#include "ctree.h"
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#include "disk-io.h"
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#include "transaction.h"
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#include "sysfs.h"
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static ssize_t btrfs_feature_attr_show(struct kobject *kobj,
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struct kobj_attribute *a, char *buf)
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{
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return snprintf(buf, PAGE_SIZE, "0\n");
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}
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BTRFS_FEAT_ATTR_INCOMPAT(mixed_backref, MIXED_BACKREF);
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BTRFS_FEAT_ATTR_INCOMPAT(default_subvol, DEFAULT_SUBVOL);
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BTRFS_FEAT_ATTR_INCOMPAT(mixed_groups, MIXED_GROUPS);
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BTRFS_FEAT_ATTR_INCOMPAT(compress_lzo, COMPRESS_LZO);
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BTRFS_FEAT_ATTR_INCOMPAT(compress_lzov2, COMPRESS_LZOv2);
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BTRFS_FEAT_ATTR_INCOMPAT(big_metadata, BIG_METADATA);
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BTRFS_FEAT_ATTR_INCOMPAT(extended_iref, EXTENDED_IREF);
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BTRFS_FEAT_ATTR_INCOMPAT(raid56, RAID56);
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BTRFS_FEAT_ATTR_INCOMPAT(skinny_metadata, SKINNY_METADATA);
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static struct attribute *btrfs_supported_feature_attrs[] = {
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BTRFS_FEAT_ATTR_PTR(mixed_backref),
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BTRFS_FEAT_ATTR_PTR(default_subvol),
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BTRFS_FEAT_ATTR_PTR(mixed_groups),
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BTRFS_FEAT_ATTR_PTR(compress_lzo),
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BTRFS_FEAT_ATTR_PTR(compress_lzov2),
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BTRFS_FEAT_ATTR_PTR(big_metadata),
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BTRFS_FEAT_ATTR_PTR(extended_iref),
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BTRFS_FEAT_ATTR_PTR(raid56),
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BTRFS_FEAT_ATTR_PTR(skinny_metadata),
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NULL
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};
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static const struct attribute_group btrfs_feature_attr_group = {
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.name = "features",
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.attrs = btrfs_supported_feature_attrs,
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};
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/* /sys/fs/btrfs/ entry */
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static struct kset *btrfs_kset;
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int btrfs_init_sysfs(void)
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{
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int ret;
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btrfs_kset = kset_create_and_add("btrfs", NULL, fs_kobj);
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if (!btrfs_kset)
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return -ENOMEM;
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ret = sysfs_create_group(&btrfs_kset->kobj, &btrfs_feature_attr_group);
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if (ret) {
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kset_unregister(btrfs_kset);
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return ret;
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}
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return 0;
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}
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void btrfs_exit_sysfs(void)
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{
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sysfs_remove_group(&btrfs_kset->kobj, &btrfs_feature_attr_group);
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kset_unregister(btrfs_kset);
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}
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