mirror of
https://github.com/AetherDroid/android_kernel_samsung_on5xelte.git
synced 2025-09-08 17:18:05 -04:00
Fixed MTP to work with TWRP
This commit is contained in:
awab228
commit
f6dfaef42e
50820 changed files with 20846062 additions and 0 deletions
758
fs/btrfs/sysfs.c
Normal file
758
fs/btrfs/sysfs.c
Normal file
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@ -0,0 +1,758 @@
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/*
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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
|
||||
* 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 <linux/bug.h>
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#include <linux/genhd.h>
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#include <linux/debugfs.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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#include "volumes.h"
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static inline struct btrfs_fs_info *to_fs_info(struct kobject *kobj);
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static u64 get_features(struct btrfs_fs_info *fs_info,
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enum btrfs_feature_set set)
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{
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struct btrfs_super_block *disk_super = fs_info->super_copy;
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if (set == FEAT_COMPAT)
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return btrfs_super_compat_flags(disk_super);
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else if (set == FEAT_COMPAT_RO)
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return btrfs_super_compat_ro_flags(disk_super);
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else
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return btrfs_super_incompat_flags(disk_super);
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}
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static void set_features(struct btrfs_fs_info *fs_info,
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enum btrfs_feature_set set, u64 features)
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{
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struct btrfs_super_block *disk_super = fs_info->super_copy;
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if (set == FEAT_COMPAT)
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btrfs_set_super_compat_flags(disk_super, features);
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else if (set == FEAT_COMPAT_RO)
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btrfs_set_super_compat_ro_flags(disk_super, features);
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else
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btrfs_set_super_incompat_flags(disk_super, features);
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}
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static int can_modify_feature(struct btrfs_feature_attr *fa)
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{
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int val = 0;
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u64 set, clear;
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switch (fa->feature_set) {
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case FEAT_COMPAT:
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set = BTRFS_FEATURE_COMPAT_SAFE_SET;
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clear = BTRFS_FEATURE_COMPAT_SAFE_CLEAR;
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break;
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case FEAT_COMPAT_RO:
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set = BTRFS_FEATURE_COMPAT_RO_SAFE_SET;
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clear = BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR;
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break;
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case FEAT_INCOMPAT:
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set = BTRFS_FEATURE_INCOMPAT_SAFE_SET;
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clear = BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR;
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break;
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default:
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printk(KERN_WARNING "btrfs: sysfs: unknown feature set %d\n",
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fa->feature_set);
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return 0;
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}
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if (set & fa->feature_bit)
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val |= 1;
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if (clear & fa->feature_bit)
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val |= 2;
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return val;
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}
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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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int val = 0;
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struct btrfs_fs_info *fs_info = to_fs_info(kobj);
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struct btrfs_feature_attr *fa = to_btrfs_feature_attr(a);
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if (fs_info) {
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u64 features = get_features(fs_info, fa->feature_set);
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if (features & fa->feature_bit)
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val = 1;
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} else
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val = can_modify_feature(fa);
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return snprintf(buf, PAGE_SIZE, "%d\n", val);
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}
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static ssize_t btrfs_feature_attr_store(struct kobject *kobj,
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struct kobj_attribute *a,
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const char *buf, size_t count)
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{
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struct btrfs_fs_info *fs_info;
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struct btrfs_feature_attr *fa = to_btrfs_feature_attr(a);
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struct btrfs_trans_handle *trans;
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u64 features, set, clear;
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unsigned long val;
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int ret;
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fs_info = to_fs_info(kobj);
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if (!fs_info)
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return -EPERM;
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ret = kstrtoul(skip_spaces(buf), 0, &val);
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if (ret)
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return ret;
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if (fa->feature_set == FEAT_COMPAT) {
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set = BTRFS_FEATURE_COMPAT_SAFE_SET;
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clear = BTRFS_FEATURE_COMPAT_SAFE_CLEAR;
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} else if (fa->feature_set == FEAT_COMPAT_RO) {
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set = BTRFS_FEATURE_COMPAT_RO_SAFE_SET;
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clear = BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR;
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} else {
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set = BTRFS_FEATURE_INCOMPAT_SAFE_SET;
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clear = BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR;
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}
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features = get_features(fs_info, fa->feature_set);
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/* Nothing to do */
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if ((val && (features & fa->feature_bit)) ||
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(!val && !(features & fa->feature_bit)))
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return count;
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if ((val && !(set & fa->feature_bit)) ||
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(!val && !(clear & fa->feature_bit))) {
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btrfs_info(fs_info,
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"%sabling feature %s on mounted fs is not supported.",
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val ? "En" : "Dis", fa->kobj_attr.attr.name);
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return -EPERM;
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}
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btrfs_info(fs_info, "%s %s feature flag",
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val ? "Setting" : "Clearing", fa->kobj_attr.attr.name);
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trans = btrfs_start_transaction(fs_info->fs_root, 0);
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if (IS_ERR(trans))
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return PTR_ERR(trans);
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spin_lock(&fs_info->super_lock);
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features = get_features(fs_info, fa->feature_set);
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if (val)
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features |= fa->feature_bit;
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else
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features &= ~fa->feature_bit;
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set_features(fs_info, fa->feature_set, features);
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spin_unlock(&fs_info->super_lock);
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ret = btrfs_commit_transaction(trans, fs_info->fs_root);
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if (ret)
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return ret;
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return count;
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}
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static umode_t btrfs_feature_visible(struct kobject *kobj,
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struct attribute *attr, int unused)
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{
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struct btrfs_fs_info *fs_info = to_fs_info(kobj);
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umode_t mode = attr->mode;
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if (fs_info) {
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struct btrfs_feature_attr *fa;
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u64 features;
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fa = attr_to_btrfs_feature_attr(attr);
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features = get_features(fs_info, fa->feature_set);
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if (can_modify_feature(fa))
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mode |= S_IWUSR;
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else if (!(features & fa->feature_bit))
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mode = 0;
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}
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return mode;
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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(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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BTRFS_FEAT_ATTR_INCOMPAT(no_holes, NO_HOLES);
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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(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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BTRFS_FEAT_ATTR_PTR(no_holes),
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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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.is_visible = btrfs_feature_visible,
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.attrs = btrfs_supported_feature_attrs,
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};
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static ssize_t btrfs_show_u64(u64 *value_ptr, spinlock_t *lock, char *buf)
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{
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u64 val;
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if (lock)
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spin_lock(lock);
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val = *value_ptr;
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if (lock)
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spin_unlock(lock);
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return snprintf(buf, PAGE_SIZE, "%llu\n", val);
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}
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static ssize_t global_rsv_size_show(struct kobject *kobj,
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struct kobj_attribute *ka, char *buf)
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{
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struct btrfs_fs_info *fs_info = to_fs_info(kobj->parent);
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struct btrfs_block_rsv *block_rsv = &fs_info->global_block_rsv;
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return btrfs_show_u64(&block_rsv->size, &block_rsv->lock, buf);
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}
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BTRFS_ATTR(global_rsv_size, global_rsv_size_show);
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static ssize_t global_rsv_reserved_show(struct kobject *kobj,
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struct kobj_attribute *a, char *buf)
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{
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struct btrfs_fs_info *fs_info = to_fs_info(kobj->parent);
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struct btrfs_block_rsv *block_rsv = &fs_info->global_block_rsv;
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return btrfs_show_u64(&block_rsv->reserved, &block_rsv->lock, buf);
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}
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BTRFS_ATTR(global_rsv_reserved, global_rsv_reserved_show);
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#define to_space_info(_kobj) container_of(_kobj, struct btrfs_space_info, kobj)
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#define to_raid_kobj(_kobj) container_of(_kobj, struct raid_kobject, kobj)
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static ssize_t raid_bytes_show(struct kobject *kobj,
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struct kobj_attribute *attr, char *buf);
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BTRFS_RAID_ATTR(total_bytes, raid_bytes_show);
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BTRFS_RAID_ATTR(used_bytes, raid_bytes_show);
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static ssize_t raid_bytes_show(struct kobject *kobj,
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struct kobj_attribute *attr, char *buf)
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||||
|
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{
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struct btrfs_space_info *sinfo = to_space_info(kobj->parent);
|
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struct btrfs_block_group_cache *block_group;
|
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int index = to_raid_kobj(kobj)->raid_type;
|
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u64 val = 0;
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|
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down_read(&sinfo->groups_sem);
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list_for_each_entry(block_group, &sinfo->block_groups[index], list) {
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if (&attr->attr == BTRFS_RAID_ATTR_PTR(total_bytes))
|
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val += block_group->key.offset;
|
||||
else
|
||||
val += btrfs_block_group_used(&block_group->item);
|
||||
}
|
||||
up_read(&sinfo->groups_sem);
|
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return snprintf(buf, PAGE_SIZE, "%llu\n", val);
|
||||
}
|
||||
|
||||
static struct attribute *raid_attributes[] = {
|
||||
BTRFS_RAID_ATTR_PTR(total_bytes),
|
||||
BTRFS_RAID_ATTR_PTR(used_bytes),
|
||||
NULL
|
||||
};
|
||||
|
||||
static void release_raid_kobj(struct kobject *kobj)
|
||||
{
|
||||
kfree(to_raid_kobj(kobj));
|
||||
}
|
||||
|
||||
struct kobj_type btrfs_raid_ktype = {
|
||||
.sysfs_ops = &kobj_sysfs_ops,
|
||||
.release = release_raid_kobj,
|
||||
.default_attrs = raid_attributes,
|
||||
};
|
||||
|
||||
#define SPACE_INFO_ATTR(field) \
|
||||
static ssize_t btrfs_space_info_show_##field(struct kobject *kobj, \
|
||||
struct kobj_attribute *a, \
|
||||
char *buf) \
|
||||
{ \
|
||||
struct btrfs_space_info *sinfo = to_space_info(kobj); \
|
||||
return btrfs_show_u64(&sinfo->field, &sinfo->lock, buf); \
|
||||
} \
|
||||
BTRFS_ATTR(field, btrfs_space_info_show_##field)
|
||||
|
||||
static ssize_t btrfs_space_info_show_total_bytes_pinned(struct kobject *kobj,
|
||||
struct kobj_attribute *a,
|
||||
char *buf)
|
||||
{
|
||||
struct btrfs_space_info *sinfo = to_space_info(kobj);
|
||||
s64 val = percpu_counter_sum(&sinfo->total_bytes_pinned);
|
||||
return snprintf(buf, PAGE_SIZE, "%lld\n", val);
|
||||
}
|
||||
|
||||
SPACE_INFO_ATTR(flags);
|
||||
SPACE_INFO_ATTR(total_bytes);
|
||||
SPACE_INFO_ATTR(bytes_used);
|
||||
SPACE_INFO_ATTR(bytes_pinned);
|
||||
SPACE_INFO_ATTR(bytes_reserved);
|
||||
SPACE_INFO_ATTR(bytes_may_use);
|
||||
SPACE_INFO_ATTR(disk_used);
|
||||
SPACE_INFO_ATTR(disk_total);
|
||||
BTRFS_ATTR(total_bytes_pinned, btrfs_space_info_show_total_bytes_pinned);
|
||||
|
||||
static struct attribute *space_info_attrs[] = {
|
||||
BTRFS_ATTR_PTR(flags),
|
||||
BTRFS_ATTR_PTR(total_bytes),
|
||||
BTRFS_ATTR_PTR(bytes_used),
|
||||
BTRFS_ATTR_PTR(bytes_pinned),
|
||||
BTRFS_ATTR_PTR(bytes_reserved),
|
||||
BTRFS_ATTR_PTR(bytes_may_use),
|
||||
BTRFS_ATTR_PTR(disk_used),
|
||||
BTRFS_ATTR_PTR(disk_total),
|
||||
BTRFS_ATTR_PTR(total_bytes_pinned),
|
||||
NULL,
|
||||
};
|
||||
|
||||
static void space_info_release(struct kobject *kobj)
|
||||
{
|
||||
struct btrfs_space_info *sinfo = to_space_info(kobj);
|
||||
percpu_counter_destroy(&sinfo->total_bytes_pinned);
|
||||
kfree(sinfo);
|
||||
}
|
||||
|
||||
struct kobj_type space_info_ktype = {
|
||||
.sysfs_ops = &kobj_sysfs_ops,
|
||||
.release = space_info_release,
|
||||
.default_attrs = space_info_attrs,
|
||||
};
|
||||
|
||||
static const struct attribute *allocation_attrs[] = {
|
||||
BTRFS_ATTR_PTR(global_rsv_reserved),
|
||||
BTRFS_ATTR_PTR(global_rsv_size),
|
||||
NULL,
|
||||
};
|
||||
|
||||
static ssize_t btrfs_label_show(struct kobject *kobj,
|
||||
struct kobj_attribute *a, char *buf)
|
||||
{
|
||||
struct btrfs_fs_info *fs_info = to_fs_info(kobj);
|
||||
char *label = fs_info->super_copy->label;
|
||||
return snprintf(buf, PAGE_SIZE, label[0] ? "%s\n" : "%s", label);
|
||||
}
|
||||
|
||||
static ssize_t btrfs_label_store(struct kobject *kobj,
|
||||
struct kobj_attribute *a,
|
||||
const char *buf, size_t len)
|
||||
{
|
||||
struct btrfs_fs_info *fs_info = to_fs_info(kobj);
|
||||
struct btrfs_trans_handle *trans;
|
||||
struct btrfs_root *root = fs_info->fs_root;
|
||||
int ret;
|
||||
size_t p_len;
|
||||
|
||||
if (fs_info->sb->s_flags & MS_RDONLY)
|
||||
return -EROFS;
|
||||
|
||||
/*
|
||||
* p_len is the len until the first occurrence of either
|
||||
* '\n' or '\0'
|
||||
*/
|
||||
p_len = strcspn(buf, "\n");
|
||||
|
||||
if (p_len >= BTRFS_LABEL_SIZE)
|
||||
return -EINVAL;
|
||||
|
||||
trans = btrfs_start_transaction(root, 0);
|
||||
if (IS_ERR(trans))
|
||||
return PTR_ERR(trans);
|
||||
|
||||
spin_lock(&root->fs_info->super_lock);
|
||||
memset(fs_info->super_copy->label, 0, BTRFS_LABEL_SIZE);
|
||||
memcpy(fs_info->super_copy->label, buf, p_len);
|
||||
spin_unlock(&root->fs_info->super_lock);
|
||||
ret = btrfs_commit_transaction(trans, root);
|
||||
|
||||
if (!ret)
|
||||
return len;
|
||||
|
||||
return ret;
|
||||
}
|
||||
BTRFS_ATTR_RW(label, btrfs_label_show, btrfs_label_store);
|
||||
|
||||
static ssize_t btrfs_nodesize_show(struct kobject *kobj,
|
||||
struct kobj_attribute *a, char *buf)
|
||||
{
|
||||
struct btrfs_fs_info *fs_info = to_fs_info(kobj);
|
||||
|
||||
return snprintf(buf, PAGE_SIZE, "%u\n", fs_info->super_copy->nodesize);
|
||||
}
|
||||
|
||||
BTRFS_ATTR(nodesize, btrfs_nodesize_show);
|
||||
|
||||
static ssize_t btrfs_sectorsize_show(struct kobject *kobj,
|
||||
struct kobj_attribute *a, char *buf)
|
||||
{
|
||||
struct btrfs_fs_info *fs_info = to_fs_info(kobj);
|
||||
|
||||
return snprintf(buf, PAGE_SIZE, "%u\n", fs_info->super_copy->sectorsize);
|
||||
}
|
||||
|
||||
BTRFS_ATTR(sectorsize, btrfs_sectorsize_show);
|
||||
|
||||
static ssize_t btrfs_clone_alignment_show(struct kobject *kobj,
|
||||
struct kobj_attribute *a, char *buf)
|
||||
{
|
||||
struct btrfs_fs_info *fs_info = to_fs_info(kobj);
|
||||
|
||||
return snprintf(buf, PAGE_SIZE, "%u\n", fs_info->super_copy->sectorsize);
|
||||
}
|
||||
|
||||
BTRFS_ATTR(clone_alignment, btrfs_clone_alignment_show);
|
||||
|
||||
static struct attribute *btrfs_attrs[] = {
|
||||
BTRFS_ATTR_PTR(label),
|
||||
BTRFS_ATTR_PTR(nodesize),
|
||||
BTRFS_ATTR_PTR(sectorsize),
|
||||
BTRFS_ATTR_PTR(clone_alignment),
|
||||
NULL,
|
||||
};
|
||||
|
||||
static void btrfs_release_super_kobj(struct kobject *kobj)
|
||||
{
|
||||
struct btrfs_fs_info *fs_info = to_fs_info(kobj);
|
||||
complete(&fs_info->kobj_unregister);
|
||||
}
|
||||
|
||||
static struct kobj_type btrfs_ktype = {
|
||||
.sysfs_ops = &kobj_sysfs_ops,
|
||||
.release = btrfs_release_super_kobj,
|
||||
.default_attrs = btrfs_attrs,
|
||||
};
|
||||
|
||||
static inline struct btrfs_fs_info *to_fs_info(struct kobject *kobj)
|
||||
{
|
||||
if (kobj->ktype != &btrfs_ktype)
|
||||
return NULL;
|
||||
return container_of(kobj, struct btrfs_fs_info, super_kobj);
|
||||
}
|
||||
|
||||
#define NUM_FEATURE_BITS 64
|
||||
static char btrfs_unknown_feature_names[3][NUM_FEATURE_BITS][13];
|
||||
static struct btrfs_feature_attr btrfs_feature_attrs[3][NUM_FEATURE_BITS];
|
||||
|
||||
static u64 supported_feature_masks[3] = {
|
||||
[FEAT_COMPAT] = BTRFS_FEATURE_COMPAT_SUPP,
|
||||
[FEAT_COMPAT_RO] = BTRFS_FEATURE_COMPAT_RO_SUPP,
|
||||
[FEAT_INCOMPAT] = BTRFS_FEATURE_INCOMPAT_SUPP,
|
||||
};
|
||||
|
||||
static int addrm_unknown_feature_attrs(struct btrfs_fs_info *fs_info, bool add)
|
||||
{
|
||||
int set;
|
||||
|
||||
for (set = 0; set < FEAT_MAX; set++) {
|
||||
int i;
|
||||
struct attribute *attrs[2];
|
||||
struct attribute_group agroup = {
|
||||
.name = "features",
|
||||
.attrs = attrs,
|
||||
};
|
||||
u64 features = get_features(fs_info, set);
|
||||
features &= ~supported_feature_masks[set];
|
||||
|
||||
if (!features)
|
||||
continue;
|
||||
|
||||
attrs[1] = NULL;
|
||||
for (i = 0; i < NUM_FEATURE_BITS; i++) {
|
||||
struct btrfs_feature_attr *fa;
|
||||
|
||||
if (!(features & (1ULL << i)))
|
||||
continue;
|
||||
|
||||
fa = &btrfs_feature_attrs[set][i];
|
||||
attrs[0] = &fa->kobj_attr.attr;
|
||||
if (add) {
|
||||
int ret;
|
||||
ret = sysfs_merge_group(&fs_info->super_kobj,
|
||||
&agroup);
|
||||
if (ret)
|
||||
return ret;
|
||||
} else
|
||||
sysfs_unmerge_group(&fs_info->super_kobj,
|
||||
&agroup);
|
||||
}
|
||||
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void __btrfs_sysfs_remove_one(struct btrfs_fs_info *fs_info)
|
||||
{
|
||||
kobject_del(&fs_info->super_kobj);
|
||||
kobject_put(&fs_info->super_kobj);
|
||||
wait_for_completion(&fs_info->kobj_unregister);
|
||||
}
|
||||
|
||||
void btrfs_sysfs_remove_one(struct btrfs_fs_info *fs_info)
|
||||
{
|
||||
if (fs_info->space_info_kobj) {
|
||||
sysfs_remove_files(fs_info->space_info_kobj, allocation_attrs);
|
||||
kobject_del(fs_info->space_info_kobj);
|
||||
kobject_put(fs_info->space_info_kobj);
|
||||
}
|
||||
kobject_del(fs_info->device_dir_kobj);
|
||||
kobject_put(fs_info->device_dir_kobj);
|
||||
addrm_unknown_feature_attrs(fs_info, false);
|
||||
sysfs_remove_group(&fs_info->super_kobj, &btrfs_feature_attr_group);
|
||||
__btrfs_sysfs_remove_one(fs_info);
|
||||
}
|
||||
|
||||
const char * const btrfs_feature_set_names[3] = {
|
||||
[FEAT_COMPAT] = "compat",
|
||||
[FEAT_COMPAT_RO] = "compat_ro",
|
||||
[FEAT_INCOMPAT] = "incompat",
|
||||
};
|
||||
|
||||
char *btrfs_printable_features(enum btrfs_feature_set set, u64 flags)
|
||||
{
|
||||
size_t bufsize = 4096; /* safe max, 64 names * 64 bytes */
|
||||
int len = 0;
|
||||
int i;
|
||||
char *str;
|
||||
|
||||
str = kmalloc(bufsize, GFP_KERNEL);
|
||||
if (!str)
|
||||
return str;
|
||||
|
||||
for (i = 0; i < ARRAY_SIZE(btrfs_feature_attrs[set]); i++) {
|
||||
const char *name;
|
||||
|
||||
if (!(flags & (1ULL << i)))
|
||||
continue;
|
||||
|
||||
name = btrfs_feature_attrs[set][i].kobj_attr.attr.name;
|
||||
len += snprintf(str + len, bufsize - len, "%s%s",
|
||||
len ? "," : "", name);
|
||||
}
|
||||
|
||||
return str;
|
||||
}
|
||||
|
||||
static void init_feature_attrs(void)
|
||||
{
|
||||
struct btrfs_feature_attr *fa;
|
||||
int set, i;
|
||||
|
||||
BUILD_BUG_ON(ARRAY_SIZE(btrfs_unknown_feature_names) !=
|
||||
ARRAY_SIZE(btrfs_feature_attrs));
|
||||
BUILD_BUG_ON(ARRAY_SIZE(btrfs_unknown_feature_names[0]) !=
|
||||
ARRAY_SIZE(btrfs_feature_attrs[0]));
|
||||
|
||||
memset(btrfs_feature_attrs, 0, sizeof(btrfs_feature_attrs));
|
||||
memset(btrfs_unknown_feature_names, 0,
|
||||
sizeof(btrfs_unknown_feature_names));
|
||||
|
||||
for (i = 0; btrfs_supported_feature_attrs[i]; i++) {
|
||||
struct btrfs_feature_attr *sfa;
|
||||
struct attribute *a = btrfs_supported_feature_attrs[i];
|
||||
int bit;
|
||||
sfa = attr_to_btrfs_feature_attr(a);
|
||||
bit = ilog2(sfa->feature_bit);
|
||||
fa = &btrfs_feature_attrs[sfa->feature_set][bit];
|
||||
|
||||
fa->kobj_attr.attr.name = sfa->kobj_attr.attr.name;
|
||||
}
|
||||
|
||||
for (set = 0; set < FEAT_MAX; set++) {
|
||||
for (i = 0; i < ARRAY_SIZE(btrfs_feature_attrs[set]); i++) {
|
||||
char *name = btrfs_unknown_feature_names[set][i];
|
||||
fa = &btrfs_feature_attrs[set][i];
|
||||
|
||||
if (fa->kobj_attr.attr.name)
|
||||
continue;
|
||||
|
||||
snprintf(name, 13, "%s:%u",
|
||||
btrfs_feature_set_names[set], i);
|
||||
|
||||
fa->kobj_attr.attr.name = name;
|
||||
fa->kobj_attr.attr.mode = S_IRUGO;
|
||||
fa->feature_set = set;
|
||||
fa->feature_bit = 1ULL << i;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
int btrfs_kobj_rm_device(struct btrfs_fs_info *fs_info,
|
||||
struct btrfs_device *one_device)
|
||||
{
|
||||
struct hd_struct *disk;
|
||||
struct kobject *disk_kobj;
|
||||
|
||||
if (!fs_info->device_dir_kobj)
|
||||
return -EINVAL;
|
||||
|
||||
if (one_device && one_device->bdev) {
|
||||
disk = one_device->bdev->bd_part;
|
||||
disk_kobj = &part_to_dev(disk)->kobj;
|
||||
|
||||
sysfs_remove_link(fs_info->device_dir_kobj,
|
||||
disk_kobj->name);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int btrfs_kobj_add_device(struct btrfs_fs_info *fs_info,
|
||||
struct btrfs_device *one_device)
|
||||
{
|
||||
int error = 0;
|
||||
struct btrfs_fs_devices *fs_devices = fs_info->fs_devices;
|
||||
struct btrfs_device *dev;
|
||||
|
||||
if (!fs_info->device_dir_kobj)
|
||||
fs_info->device_dir_kobj = kobject_create_and_add("devices",
|
||||
&fs_info->super_kobj);
|
||||
|
||||
if (!fs_info->device_dir_kobj)
|
||||
return -ENOMEM;
|
||||
|
||||
list_for_each_entry(dev, &fs_devices->devices, dev_list) {
|
||||
struct hd_struct *disk;
|
||||
struct kobject *disk_kobj;
|
||||
|
||||
if (!dev->bdev)
|
||||
continue;
|
||||
|
||||
if (one_device && one_device != dev)
|
||||
continue;
|
||||
|
||||
disk = dev->bdev->bd_part;
|
||||
disk_kobj = &part_to_dev(disk)->kobj;
|
||||
|
||||
error = sysfs_create_link(fs_info->device_dir_kobj,
|
||||
disk_kobj, disk_kobj->name);
|
||||
if (error)
|
||||
break;
|
||||
}
|
||||
|
||||
return error;
|
||||
}
|
||||
|
||||
/* /sys/fs/btrfs/ entry */
|
||||
static struct kset *btrfs_kset;
|
||||
|
||||
/* /sys/kernel/debug/btrfs */
|
||||
static struct dentry *btrfs_debugfs_root_dentry;
|
||||
|
||||
/* Debugging tunables and exported data */
|
||||
u64 btrfs_debugfs_test;
|
||||
|
||||
int btrfs_sysfs_add_one(struct btrfs_fs_info *fs_info)
|
||||
{
|
||||
int error;
|
||||
|
||||
init_completion(&fs_info->kobj_unregister);
|
||||
fs_info->super_kobj.kset = btrfs_kset;
|
||||
error = kobject_init_and_add(&fs_info->super_kobj, &btrfs_ktype, NULL,
|
||||
"%pU", fs_info->fsid);
|
||||
if (error)
|
||||
return error;
|
||||
|
||||
error = sysfs_create_group(&fs_info->super_kobj,
|
||||
&btrfs_feature_attr_group);
|
||||
if (error) {
|
||||
__btrfs_sysfs_remove_one(fs_info);
|
||||
return error;
|
||||
}
|
||||
|
||||
error = addrm_unknown_feature_attrs(fs_info, true);
|
||||
if (error)
|
||||
goto failure;
|
||||
|
||||
error = btrfs_kobj_add_device(fs_info, NULL);
|
||||
if (error)
|
||||
goto failure;
|
||||
|
||||
fs_info->space_info_kobj = kobject_create_and_add("allocation",
|
||||
&fs_info->super_kobj);
|
||||
if (!fs_info->space_info_kobj) {
|
||||
error = -ENOMEM;
|
||||
goto failure;
|
||||
}
|
||||
|
||||
error = sysfs_create_files(fs_info->space_info_kobj, allocation_attrs);
|
||||
if (error)
|
||||
goto failure;
|
||||
|
||||
return 0;
|
||||
failure:
|
||||
btrfs_sysfs_remove_one(fs_info);
|
||||
return error;
|
||||
}
|
||||
|
||||
static int btrfs_init_debugfs(void)
|
||||
{
|
||||
#ifdef CONFIG_DEBUG_FS
|
||||
btrfs_debugfs_root_dentry = debugfs_create_dir("btrfs", NULL);
|
||||
if (!btrfs_debugfs_root_dentry)
|
||||
return -ENOMEM;
|
||||
|
||||
debugfs_create_u64("test", S_IRUGO | S_IWUGO, btrfs_debugfs_root_dentry,
|
||||
&btrfs_debugfs_test);
|
||||
#endif
|
||||
return 0;
|
||||
}
|
||||
|
||||
int btrfs_init_sysfs(void)
|
||||
{
|
||||
int ret;
|
||||
|
||||
btrfs_kset = kset_create_and_add("btrfs", NULL, fs_kobj);
|
||||
if (!btrfs_kset)
|
||||
return -ENOMEM;
|
||||
|
||||
ret = btrfs_init_debugfs();
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
init_feature_attrs();
|
||||
ret = sysfs_create_group(&btrfs_kset->kobj, &btrfs_feature_attr_group);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
void btrfs_exit_sysfs(void)
|
||||
{
|
||||
sysfs_remove_group(&btrfs_kset->kobj, &btrfs_feature_attr_group);
|
||||
kset_unregister(btrfs_kset);
|
||||
debugfs_remove_recursive(btrfs_debugfs_root_dentry);
|
||||
}
|
||||
|
||||
Loading…
Add table
Add a link
Reference in a new issue