^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (C) 2007 Oracle. All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/sched/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/spinlock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/completion.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/bug.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <crypto/hash.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include "ctree.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include "discard.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include "disk-io.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include "send.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include "transaction.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include "sysfs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include "volumes.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include "space-info.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include "block-group.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include "qgroup.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) struct btrfs_feature_attr {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) struct kobj_attribute kobj_attr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) enum btrfs_feature_set feature_set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) u64 feature_bit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) /* For raid type sysfs entries */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) struct raid_kobject {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) u64 flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) struct kobject kobj;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #define __INIT_KOBJ_ATTR(_name, _mode, _show, _store) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) .attr = { .name = __stringify(_name), .mode = _mode }, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) .show = _show, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) .store = _store, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #define BTRFS_ATTR_RW(_prefix, _name, _show, _store) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) static struct kobj_attribute btrfs_attr_##_prefix##_##_name = \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) __INIT_KOBJ_ATTR(_name, 0644, _show, _store)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #define BTRFS_ATTR(_prefix, _name, _show) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) static struct kobj_attribute btrfs_attr_##_prefix##_##_name = \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) __INIT_KOBJ_ATTR(_name, 0444, _show, NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #define BTRFS_ATTR_PTR(_prefix, _name) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) (&btrfs_attr_##_prefix##_##_name.attr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #define BTRFS_FEAT_ATTR(_name, _feature_set, _feature_prefix, _feature_bit) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) static struct btrfs_feature_attr btrfs_attr_features_##_name = { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) .kobj_attr = __INIT_KOBJ_ATTR(_name, S_IRUGO, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) btrfs_feature_attr_show, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) btrfs_feature_attr_store), \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) .feature_set = _feature_set, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) .feature_bit = _feature_prefix ##_## _feature_bit, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) #define BTRFS_FEAT_ATTR_PTR(_name) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) (&btrfs_attr_features_##_name.kobj_attr.attr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) #define BTRFS_FEAT_ATTR_COMPAT(name, feature) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) BTRFS_FEAT_ATTR(name, FEAT_COMPAT, BTRFS_FEATURE_COMPAT, feature)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) #define BTRFS_FEAT_ATTR_COMPAT_RO(name, feature) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) BTRFS_FEAT_ATTR(name, FEAT_COMPAT_RO, BTRFS_FEATURE_COMPAT_RO, feature)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) #define BTRFS_FEAT_ATTR_INCOMPAT(name, feature) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) BTRFS_FEAT_ATTR(name, FEAT_INCOMPAT, BTRFS_FEATURE_INCOMPAT, feature)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) static inline struct btrfs_fs_info *to_fs_info(struct kobject *kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) static inline struct btrfs_fs_devices *to_fs_devs(struct kobject *kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) static struct btrfs_feature_attr *to_btrfs_feature_attr(struct kobj_attribute *a)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) return container_of(a, struct btrfs_feature_attr, kobj_attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) static struct kobj_attribute *attr_to_btrfs_attr(struct attribute *attr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) return container_of(attr, struct kobj_attribute, attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) static struct btrfs_feature_attr *attr_to_btrfs_feature_attr(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) struct attribute *attr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) return to_btrfs_feature_attr(attr_to_btrfs_attr(attr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) static u64 get_features(struct btrfs_fs_info *fs_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) enum btrfs_feature_set set)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) struct btrfs_super_block *disk_super = fs_info->super_copy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) if (set == FEAT_COMPAT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) return btrfs_super_compat_flags(disk_super);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) else if (set == FEAT_COMPAT_RO)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) return btrfs_super_compat_ro_flags(disk_super);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) return btrfs_super_incompat_flags(disk_super);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) static void set_features(struct btrfs_fs_info *fs_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) enum btrfs_feature_set set, u64 features)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) struct btrfs_super_block *disk_super = fs_info->super_copy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) if (set == FEAT_COMPAT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) btrfs_set_super_compat_flags(disk_super, features);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) else if (set == FEAT_COMPAT_RO)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) btrfs_set_super_compat_ro_flags(disk_super, features);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) btrfs_set_super_incompat_flags(disk_super, features);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) static int can_modify_feature(struct btrfs_feature_attr *fa)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) int val = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) u64 set, clear;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) switch (fa->feature_set) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) case FEAT_COMPAT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) set = BTRFS_FEATURE_COMPAT_SAFE_SET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) clear = BTRFS_FEATURE_COMPAT_SAFE_CLEAR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) case FEAT_COMPAT_RO:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) set = BTRFS_FEATURE_COMPAT_RO_SAFE_SET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) clear = BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) case FEAT_INCOMPAT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) set = BTRFS_FEATURE_INCOMPAT_SAFE_SET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) clear = BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) pr_warn("btrfs: sysfs: unknown feature set %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) fa->feature_set);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) if (set & fa->feature_bit)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) val |= 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) if (clear & fa->feature_bit)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) val |= 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) return val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) static ssize_t btrfs_feature_attr_show(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) struct kobj_attribute *a, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) int val = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) struct btrfs_fs_info *fs_info = to_fs_info(kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) struct btrfs_feature_attr *fa = to_btrfs_feature_attr(a);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) if (fs_info) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) u64 features = get_features(fs_info, fa->feature_set);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) if (features & fa->feature_bit)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) val = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) val = can_modify_feature(fa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) return scnprintf(buf, PAGE_SIZE, "%d\n", val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) static ssize_t btrfs_feature_attr_store(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) struct kobj_attribute *a,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) const char *buf, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) struct btrfs_fs_info *fs_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) struct btrfs_feature_attr *fa = to_btrfs_feature_attr(a);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) u64 features, set, clear;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) unsigned long val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) fs_info = to_fs_info(kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) if (!fs_info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) return -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) if (sb_rdonly(fs_info->sb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) return -EROFS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) ret = kstrtoul(skip_spaces(buf), 0, &val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) if (fa->feature_set == FEAT_COMPAT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) set = BTRFS_FEATURE_COMPAT_SAFE_SET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) clear = BTRFS_FEATURE_COMPAT_SAFE_CLEAR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) } else if (fa->feature_set == FEAT_COMPAT_RO) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) set = BTRFS_FEATURE_COMPAT_RO_SAFE_SET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) clear = BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) set = BTRFS_FEATURE_INCOMPAT_SAFE_SET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) clear = BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) features = get_features(fs_info, fa->feature_set);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) /* Nothing to do */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) if ((val && (features & fa->feature_bit)) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) (!val && !(features & fa->feature_bit)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) if ((val && !(set & fa->feature_bit)) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) (!val && !(clear & fa->feature_bit))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) btrfs_info(fs_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) "%sabling feature %s on mounted fs is not supported.",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) val ? "En" : "Dis", fa->kobj_attr.attr.name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) return -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) btrfs_info(fs_info, "%s %s feature flag",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) val ? "Setting" : "Clearing", fa->kobj_attr.attr.name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) spin_lock(&fs_info->super_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) features = get_features(fs_info, fa->feature_set);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) if (val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) features |= fa->feature_bit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) features &= ~fa->feature_bit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) set_features(fs_info, fa->feature_set, features);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) spin_unlock(&fs_info->super_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) * We don't want to do full transaction commit from inside sysfs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) btrfs_set_pending(fs_info, COMMIT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) wake_up_process(fs_info->transaction_kthread);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) static umode_t btrfs_feature_visible(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) struct attribute *attr, int unused)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) struct btrfs_fs_info *fs_info = to_fs_info(kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) umode_t mode = attr->mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) if (fs_info) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) struct btrfs_feature_attr *fa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) u64 features;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) fa = attr_to_btrfs_feature_attr(attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) features = get_features(fs_info, fa->feature_set);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) if (can_modify_feature(fa))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) mode |= S_IWUSR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) else if (!(features & fa->feature_bit))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) mode = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) return mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) BTRFS_FEAT_ATTR_INCOMPAT(mixed_backref, MIXED_BACKREF);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) BTRFS_FEAT_ATTR_INCOMPAT(default_subvol, DEFAULT_SUBVOL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) BTRFS_FEAT_ATTR_INCOMPAT(mixed_groups, MIXED_GROUPS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) BTRFS_FEAT_ATTR_INCOMPAT(compress_lzo, COMPRESS_LZO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) BTRFS_FEAT_ATTR_INCOMPAT(compress_zstd, COMPRESS_ZSTD);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) BTRFS_FEAT_ATTR_INCOMPAT(big_metadata, BIG_METADATA);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) BTRFS_FEAT_ATTR_INCOMPAT(extended_iref, EXTENDED_IREF);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) BTRFS_FEAT_ATTR_INCOMPAT(raid56, RAID56);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) BTRFS_FEAT_ATTR_INCOMPAT(skinny_metadata, SKINNY_METADATA);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) BTRFS_FEAT_ATTR_INCOMPAT(no_holes, NO_HOLES);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) BTRFS_FEAT_ATTR_INCOMPAT(metadata_uuid, METADATA_UUID);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) BTRFS_FEAT_ATTR_COMPAT_RO(free_space_tree, FREE_SPACE_TREE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) BTRFS_FEAT_ATTR_INCOMPAT(raid1c34, RAID1C34);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) static struct attribute *btrfs_supported_feature_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) BTRFS_FEAT_ATTR_PTR(mixed_backref),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) BTRFS_FEAT_ATTR_PTR(default_subvol),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) BTRFS_FEAT_ATTR_PTR(mixed_groups),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) BTRFS_FEAT_ATTR_PTR(compress_lzo),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) BTRFS_FEAT_ATTR_PTR(compress_zstd),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) BTRFS_FEAT_ATTR_PTR(big_metadata),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) BTRFS_FEAT_ATTR_PTR(extended_iref),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) BTRFS_FEAT_ATTR_PTR(raid56),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) BTRFS_FEAT_ATTR_PTR(skinny_metadata),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) BTRFS_FEAT_ATTR_PTR(no_holes),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) BTRFS_FEAT_ATTR_PTR(metadata_uuid),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) BTRFS_FEAT_ATTR_PTR(free_space_tree),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) BTRFS_FEAT_ATTR_PTR(raid1c34),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) * Features which depend on feature bits and may differ between each fs.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) * /sys/fs/btrfs/features lists all available features of this kernel while
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) * /sys/fs/btrfs/UUID/features shows features of the fs which are enabled or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) * can be changed online.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) static const struct attribute_group btrfs_feature_attr_group = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) .name = "features",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) .is_visible = btrfs_feature_visible,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) .attrs = btrfs_supported_feature_attrs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) static ssize_t rmdir_subvol_show(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) struct kobj_attribute *ka, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) return scnprintf(buf, PAGE_SIZE, "0\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) BTRFS_ATTR(static_feature, rmdir_subvol, rmdir_subvol_show);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) static ssize_t supported_checksums_show(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) struct kobj_attribute *a, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) ssize_t ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) for (i = 0; i < btrfs_get_num_csums(); i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) * This "trick" only works as long as 'enum btrfs_csum_type' has
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) * no holes in it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) ret += scnprintf(buf + ret, PAGE_SIZE - ret, "%s%s",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) (i == 0 ? "" : " "), btrfs_super_csum_name(i));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) ret += scnprintf(buf + ret, PAGE_SIZE - ret, "\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) BTRFS_ATTR(static_feature, supported_checksums, supported_checksums_show);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) static ssize_t send_stream_version_show(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) struct kobj_attribute *ka, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) return snprintf(buf, PAGE_SIZE, "%d\n", BTRFS_SEND_STREAM_VERSION);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) BTRFS_ATTR(static_feature, send_stream_version, send_stream_version_show);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) static struct attribute *btrfs_supported_static_feature_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) BTRFS_ATTR_PTR(static_feature, rmdir_subvol),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) BTRFS_ATTR_PTR(static_feature, supported_checksums),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) BTRFS_ATTR_PTR(static_feature, send_stream_version),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) * Features which only depend on kernel version.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) * These are listed in /sys/fs/btrfs/features along with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) * btrfs_feature_attr_group
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) static const struct attribute_group btrfs_static_feature_attr_group = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) .name = "features",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) .attrs = btrfs_supported_static_feature_attrs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) #ifdef CONFIG_BTRFS_DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) * Discard statistics and tunables
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) #define discard_to_fs_info(_kobj) to_fs_info((_kobj)->parent->parent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) static ssize_t btrfs_discardable_bytes_show(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) struct kobj_attribute *a,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) struct btrfs_fs_info *fs_info = discard_to_fs_info(kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) return scnprintf(buf, PAGE_SIZE, "%lld\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) atomic64_read(&fs_info->discard_ctl.discardable_bytes));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) BTRFS_ATTR(discard, discardable_bytes, btrfs_discardable_bytes_show);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) static ssize_t btrfs_discardable_extents_show(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) struct kobj_attribute *a,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) struct btrfs_fs_info *fs_info = discard_to_fs_info(kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) return scnprintf(buf, PAGE_SIZE, "%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) atomic_read(&fs_info->discard_ctl.discardable_extents));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) BTRFS_ATTR(discard, discardable_extents, btrfs_discardable_extents_show);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) static ssize_t btrfs_discard_bitmap_bytes_show(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) struct kobj_attribute *a,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) struct btrfs_fs_info *fs_info = discard_to_fs_info(kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) return scnprintf(buf, PAGE_SIZE, "%llu\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) fs_info->discard_ctl.discard_bitmap_bytes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) BTRFS_ATTR(discard, discard_bitmap_bytes, btrfs_discard_bitmap_bytes_show);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) static ssize_t btrfs_discard_bytes_saved_show(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) struct kobj_attribute *a,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) struct btrfs_fs_info *fs_info = discard_to_fs_info(kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) return scnprintf(buf, PAGE_SIZE, "%lld\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) atomic64_read(&fs_info->discard_ctl.discard_bytes_saved));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) BTRFS_ATTR(discard, discard_bytes_saved, btrfs_discard_bytes_saved_show);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) static ssize_t btrfs_discard_extent_bytes_show(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) struct kobj_attribute *a,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) struct btrfs_fs_info *fs_info = discard_to_fs_info(kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) return scnprintf(buf, PAGE_SIZE, "%llu\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) fs_info->discard_ctl.discard_extent_bytes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) BTRFS_ATTR(discard, discard_extent_bytes, btrfs_discard_extent_bytes_show);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) static ssize_t btrfs_discard_iops_limit_show(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) struct kobj_attribute *a,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) struct btrfs_fs_info *fs_info = discard_to_fs_info(kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) return scnprintf(buf, PAGE_SIZE, "%u\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) READ_ONCE(fs_info->discard_ctl.iops_limit));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) static ssize_t btrfs_discard_iops_limit_store(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) struct kobj_attribute *a,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) const char *buf, size_t len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) struct btrfs_fs_info *fs_info = discard_to_fs_info(kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) struct btrfs_discard_ctl *discard_ctl = &fs_info->discard_ctl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) u32 iops_limit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) ret = kstrtou32(buf, 10, &iops_limit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) WRITE_ONCE(discard_ctl->iops_limit, iops_limit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) return len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) BTRFS_ATTR_RW(discard, iops_limit, btrfs_discard_iops_limit_show,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) btrfs_discard_iops_limit_store);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) static ssize_t btrfs_discard_kbps_limit_show(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) struct kobj_attribute *a,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) struct btrfs_fs_info *fs_info = discard_to_fs_info(kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) return scnprintf(buf, PAGE_SIZE, "%u\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) READ_ONCE(fs_info->discard_ctl.kbps_limit));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) static ssize_t btrfs_discard_kbps_limit_store(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) struct kobj_attribute *a,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) const char *buf, size_t len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) struct btrfs_fs_info *fs_info = discard_to_fs_info(kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) struct btrfs_discard_ctl *discard_ctl = &fs_info->discard_ctl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) u32 kbps_limit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) ret = kstrtou32(buf, 10, &kbps_limit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) WRITE_ONCE(discard_ctl->kbps_limit, kbps_limit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) return len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) BTRFS_ATTR_RW(discard, kbps_limit, btrfs_discard_kbps_limit_show,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) btrfs_discard_kbps_limit_store);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) static ssize_t btrfs_discard_max_discard_size_show(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) struct kobj_attribute *a,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) struct btrfs_fs_info *fs_info = discard_to_fs_info(kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) return scnprintf(buf, PAGE_SIZE, "%llu\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) READ_ONCE(fs_info->discard_ctl.max_discard_size));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) static ssize_t btrfs_discard_max_discard_size_store(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) struct kobj_attribute *a,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) const char *buf, size_t len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) struct btrfs_fs_info *fs_info = discard_to_fs_info(kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) struct btrfs_discard_ctl *discard_ctl = &fs_info->discard_ctl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) u64 max_discard_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) ret = kstrtou64(buf, 10, &max_discard_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) WRITE_ONCE(discard_ctl->max_discard_size, max_discard_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) return len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) BTRFS_ATTR_RW(discard, max_discard_size, btrfs_discard_max_discard_size_show,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) btrfs_discard_max_discard_size_store);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) static const struct attribute *discard_debug_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) BTRFS_ATTR_PTR(discard, discardable_bytes),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) BTRFS_ATTR_PTR(discard, discardable_extents),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) BTRFS_ATTR_PTR(discard, discard_bitmap_bytes),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) BTRFS_ATTR_PTR(discard, discard_bytes_saved),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) BTRFS_ATTR_PTR(discard, discard_extent_bytes),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) BTRFS_ATTR_PTR(discard, iops_limit),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) BTRFS_ATTR_PTR(discard, kbps_limit),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) BTRFS_ATTR_PTR(discard, max_discard_size),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) * Runtime debugging exported via sysfs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) * /sys/fs/btrfs/debug - applies to module or all filesystems
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) * /sys/fs/btrfs/UUID - applies only to the given filesystem
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) static const struct attribute *btrfs_debug_mount_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) static struct attribute *btrfs_debug_feature_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) static const struct attribute_group btrfs_debug_feature_attr_group = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) .name = "debug",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) .attrs = btrfs_debug_feature_attrs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) static ssize_t btrfs_show_u64(u64 *value_ptr, spinlock_t *lock, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) u64 val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) if (lock)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) spin_lock(lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) val = *value_ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) if (lock)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) spin_unlock(lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) return scnprintf(buf, PAGE_SIZE, "%llu\n", val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) static ssize_t global_rsv_size_show(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) struct kobj_attribute *ka, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) struct btrfs_fs_info *fs_info = to_fs_info(kobj->parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) struct btrfs_block_rsv *block_rsv = &fs_info->global_block_rsv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) return btrfs_show_u64(&block_rsv->size, &block_rsv->lock, buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) BTRFS_ATTR(allocation, global_rsv_size, global_rsv_size_show);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) static ssize_t global_rsv_reserved_show(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) struct kobj_attribute *a, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) struct btrfs_fs_info *fs_info = to_fs_info(kobj->parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) struct btrfs_block_rsv *block_rsv = &fs_info->global_block_rsv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) return btrfs_show_u64(&block_rsv->reserved, &block_rsv->lock, buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) BTRFS_ATTR(allocation, global_rsv_reserved, global_rsv_reserved_show);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) #define to_space_info(_kobj) container_of(_kobj, struct btrfs_space_info, kobj)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) #define to_raid_kobj(_kobj) container_of(_kobj, struct raid_kobject, kobj)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) static ssize_t raid_bytes_show(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) struct kobj_attribute *attr, char *buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) BTRFS_ATTR(raid, total_bytes, raid_bytes_show);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) BTRFS_ATTR(raid, used_bytes, raid_bytes_show);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) static ssize_t raid_bytes_show(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) struct kobj_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) struct btrfs_space_info *sinfo = to_space_info(kobj->parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) struct btrfs_block_group *block_group;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) int index = btrfs_bg_flags_to_raid_index(to_raid_kobj(kobj)->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) u64 val = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) down_read(&sinfo->groups_sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) list_for_each_entry(block_group, &sinfo->block_groups[index], list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) if (&attr->attr == BTRFS_ATTR_PTR(raid, total_bytes))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) val += block_group->length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) val += block_group->used;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) up_read(&sinfo->groups_sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) return scnprintf(buf, PAGE_SIZE, "%llu\n", val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) static struct attribute *raid_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) BTRFS_ATTR_PTR(raid, total_bytes),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) BTRFS_ATTR_PTR(raid, used_bytes),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) ATTRIBUTE_GROUPS(raid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) static void release_raid_kobj(struct kobject *kobj)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) kfree(to_raid_kobj(kobj));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) static struct kobj_type btrfs_raid_ktype = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) .sysfs_ops = &kobj_sysfs_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) .release = release_raid_kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) .default_groups = raid_groups,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) #define SPACE_INFO_ATTR(field) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) static ssize_t btrfs_space_info_show_##field(struct kobject *kobj, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) struct kobj_attribute *a, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) char *buf) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) struct btrfs_space_info *sinfo = to_space_info(kobj); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) return btrfs_show_u64(&sinfo->field, &sinfo->lock, buf); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) } \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) BTRFS_ATTR(space_info, field, btrfs_space_info_show_##field)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) static ssize_t btrfs_space_info_show_total_bytes_pinned(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) struct kobj_attribute *a,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) struct btrfs_space_info *sinfo = to_space_info(kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) s64 val = percpu_counter_sum(&sinfo->total_bytes_pinned);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) return scnprintf(buf, PAGE_SIZE, "%lld\n", val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) SPACE_INFO_ATTR(flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) SPACE_INFO_ATTR(total_bytes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) SPACE_INFO_ATTR(bytes_used);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) SPACE_INFO_ATTR(bytes_pinned);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) SPACE_INFO_ATTR(bytes_reserved);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) SPACE_INFO_ATTR(bytes_may_use);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) SPACE_INFO_ATTR(bytes_readonly);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) SPACE_INFO_ATTR(disk_used);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) SPACE_INFO_ATTR(disk_total);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) BTRFS_ATTR(space_info, total_bytes_pinned,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) btrfs_space_info_show_total_bytes_pinned);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) static struct attribute *space_info_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) BTRFS_ATTR_PTR(space_info, flags),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) BTRFS_ATTR_PTR(space_info, total_bytes),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) BTRFS_ATTR_PTR(space_info, bytes_used),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) BTRFS_ATTR_PTR(space_info, bytes_pinned),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) BTRFS_ATTR_PTR(space_info, bytes_reserved),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) BTRFS_ATTR_PTR(space_info, bytes_may_use),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) BTRFS_ATTR_PTR(space_info, bytes_readonly),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) BTRFS_ATTR_PTR(space_info, disk_used),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) BTRFS_ATTR_PTR(space_info, disk_total),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) BTRFS_ATTR_PTR(space_info, total_bytes_pinned),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) ATTRIBUTE_GROUPS(space_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) static void space_info_release(struct kobject *kobj)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) struct btrfs_space_info *sinfo = to_space_info(kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) percpu_counter_destroy(&sinfo->total_bytes_pinned);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) kfree(sinfo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) static struct kobj_type space_info_ktype = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) .sysfs_ops = &kobj_sysfs_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) .release = space_info_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) .default_groups = space_info_groups,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) static const struct attribute *allocation_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) BTRFS_ATTR_PTR(allocation, global_rsv_reserved),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) BTRFS_ATTR_PTR(allocation, global_rsv_size),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) static ssize_t btrfs_label_show(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) struct kobj_attribute *a, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) struct btrfs_fs_info *fs_info = to_fs_info(kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) char *label = fs_info->super_copy->label;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) ssize_t ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) spin_lock(&fs_info->super_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) ret = scnprintf(buf, PAGE_SIZE, label[0] ? "%s\n" : "%s", label);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) spin_unlock(&fs_info->super_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) static ssize_t btrfs_label_store(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) struct kobj_attribute *a,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) const char *buf, size_t len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) struct btrfs_fs_info *fs_info = to_fs_info(kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) size_t p_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) if (!fs_info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) return -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) if (sb_rdonly(fs_info->sb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) return -EROFS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) * p_len is the len until the first occurrence of either
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) * '\n' or '\0'
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) p_len = strcspn(buf, "\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) if (p_len >= BTRFS_LABEL_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) spin_lock(&fs_info->super_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) memset(fs_info->super_copy->label, 0, BTRFS_LABEL_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) memcpy(fs_info->super_copy->label, buf, p_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) spin_unlock(&fs_info->super_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) * We don't want to do full transaction commit from inside sysfs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) btrfs_set_pending(fs_info, COMMIT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) wake_up_process(fs_info->transaction_kthread);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) return len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) BTRFS_ATTR_RW(, label, btrfs_label_show, btrfs_label_store);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) static ssize_t btrfs_nodesize_show(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) struct kobj_attribute *a, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) struct btrfs_fs_info *fs_info = to_fs_info(kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) return scnprintf(buf, PAGE_SIZE, "%u\n", fs_info->super_copy->nodesize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) BTRFS_ATTR(, nodesize, btrfs_nodesize_show);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) static ssize_t btrfs_sectorsize_show(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) struct kobj_attribute *a, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) struct btrfs_fs_info *fs_info = to_fs_info(kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) return scnprintf(buf, PAGE_SIZE, "%u\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) fs_info->super_copy->sectorsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) BTRFS_ATTR(, sectorsize, btrfs_sectorsize_show);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) static ssize_t btrfs_clone_alignment_show(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) struct kobj_attribute *a, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) struct btrfs_fs_info *fs_info = to_fs_info(kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) return scnprintf(buf, PAGE_SIZE, "%u\n", fs_info->super_copy->sectorsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) BTRFS_ATTR(, clone_alignment, btrfs_clone_alignment_show);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) static ssize_t quota_override_show(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) struct kobj_attribute *a, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) struct btrfs_fs_info *fs_info = to_fs_info(kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) int quota_override;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) quota_override = test_bit(BTRFS_FS_QUOTA_OVERRIDE, &fs_info->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) return scnprintf(buf, PAGE_SIZE, "%d\n", quota_override);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) static ssize_t quota_override_store(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) struct kobj_attribute *a,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) const char *buf, size_t len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) struct btrfs_fs_info *fs_info = to_fs_info(kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) unsigned long knob;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) if (!fs_info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) return -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) if (!capable(CAP_SYS_RESOURCE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) return -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) err = kstrtoul(buf, 10, &knob);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) if (knob > 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) if (knob)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) set_bit(BTRFS_FS_QUOTA_OVERRIDE, &fs_info->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) clear_bit(BTRFS_FS_QUOTA_OVERRIDE, &fs_info->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) return len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) BTRFS_ATTR_RW(, quota_override, quota_override_show, quota_override_store);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) static ssize_t btrfs_metadata_uuid_show(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) struct kobj_attribute *a, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) struct btrfs_fs_info *fs_info = to_fs_info(kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) return scnprintf(buf, PAGE_SIZE, "%pU\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) fs_info->fs_devices->metadata_uuid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) BTRFS_ATTR(, metadata_uuid, btrfs_metadata_uuid_show);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) static ssize_t btrfs_checksum_show(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) struct kobj_attribute *a, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) struct btrfs_fs_info *fs_info = to_fs_info(kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) u16 csum_type = btrfs_super_csum_type(fs_info->super_copy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) return scnprintf(buf, PAGE_SIZE, "%s (%s)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) btrfs_super_csum_name(csum_type),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) crypto_shash_driver_name(fs_info->csum_shash));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) BTRFS_ATTR(, checksum, btrfs_checksum_show);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) static ssize_t btrfs_exclusive_operation_show(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) struct kobj_attribute *a, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) struct btrfs_fs_info *fs_info = to_fs_info(kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) const char *str;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) switch (READ_ONCE(fs_info->exclusive_operation)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) case BTRFS_EXCLOP_NONE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) str = "none\n";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) case BTRFS_EXCLOP_BALANCE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) str = "balance\n";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) case BTRFS_EXCLOP_DEV_ADD:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) str = "device add\n";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) case BTRFS_EXCLOP_DEV_REMOVE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) str = "device remove\n";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) case BTRFS_EXCLOP_DEV_REPLACE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) str = "device replace\n";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) case BTRFS_EXCLOP_RESIZE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) str = "resize\n";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) case BTRFS_EXCLOP_SWAP_ACTIVATE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) str = "swap activate\n";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) str = "UNKNOWN\n";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) return scnprintf(buf, PAGE_SIZE, "%s", str);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) BTRFS_ATTR(, exclusive_operation, btrfs_exclusive_operation_show);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) static const struct attribute *btrfs_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) BTRFS_ATTR_PTR(, label),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) BTRFS_ATTR_PTR(, nodesize),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) BTRFS_ATTR_PTR(, sectorsize),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) BTRFS_ATTR_PTR(, clone_alignment),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) BTRFS_ATTR_PTR(, quota_override),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) BTRFS_ATTR_PTR(, metadata_uuid),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) BTRFS_ATTR_PTR(, checksum),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) BTRFS_ATTR_PTR(, exclusive_operation),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) static void btrfs_release_fsid_kobj(struct kobject *kobj)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) struct btrfs_fs_devices *fs_devs = to_fs_devs(kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) memset(&fs_devs->fsid_kobj, 0, sizeof(struct kobject));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) complete(&fs_devs->kobj_unregister);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) static struct kobj_type btrfs_ktype = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) .sysfs_ops = &kobj_sysfs_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) .release = btrfs_release_fsid_kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) static inline struct btrfs_fs_devices *to_fs_devs(struct kobject *kobj)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) if (kobj->ktype != &btrfs_ktype)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) return container_of(kobj, struct btrfs_fs_devices, fsid_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) static inline struct btrfs_fs_info *to_fs_info(struct kobject *kobj)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) if (kobj->ktype != &btrfs_ktype)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) return to_fs_devs(kobj)->fs_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) #define NUM_FEATURE_BITS 64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) #define BTRFS_FEATURE_NAME_MAX 13
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) static char btrfs_unknown_feature_names[FEAT_MAX][NUM_FEATURE_BITS][BTRFS_FEATURE_NAME_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) static struct btrfs_feature_attr btrfs_feature_attrs[FEAT_MAX][NUM_FEATURE_BITS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) static const u64 supported_feature_masks[FEAT_MAX] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) [FEAT_COMPAT] = BTRFS_FEATURE_COMPAT_SUPP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) [FEAT_COMPAT_RO] = BTRFS_FEATURE_COMPAT_RO_SUPP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) [FEAT_INCOMPAT] = BTRFS_FEATURE_INCOMPAT_SUPP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) static int addrm_unknown_feature_attrs(struct btrfs_fs_info *fs_info, bool add)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) int set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) for (set = 0; set < FEAT_MAX; set++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) struct attribute *attrs[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) struct attribute_group agroup = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) .name = "features",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) .attrs = attrs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918) u64 features = get_features(fs_info, set);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) features &= ~supported_feature_masks[set];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) if (!features)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) attrs[1] = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) for (i = 0; i < NUM_FEATURE_BITS; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) struct btrfs_feature_attr *fa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) if (!(features & (1ULL << i)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) fa = &btrfs_feature_attrs[set][i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932) attrs[0] = &fa->kobj_attr.attr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933) if (add) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) ret = sysfs_merge_group(&fs_info->fs_devices->fsid_kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) &agroup);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) sysfs_unmerge_group(&fs_info->fs_devices->fsid_kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) &agroup);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) static void __btrfs_sysfs_remove_fsid(struct btrfs_fs_devices *fs_devs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950) if (fs_devs->devinfo_kobj) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951) kobject_del(fs_devs->devinfo_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952) kobject_put(fs_devs->devinfo_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953) fs_devs->devinfo_kobj = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956) if (fs_devs->devices_kobj) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957) kobject_del(fs_devs->devices_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) kobject_put(fs_devs->devices_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959) fs_devs->devices_kobj = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962) if (fs_devs->fsid_kobj.state_initialized) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963) kobject_del(&fs_devs->fsid_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964) kobject_put(&fs_devs->fsid_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) wait_for_completion(&fs_devs->kobj_unregister);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969) /* when fs_devs is NULL it will remove all fsid kobject */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) void btrfs_sysfs_remove_fsid(struct btrfs_fs_devices *fs_devs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972) struct list_head *fs_uuids = btrfs_get_fs_uuids();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974) if (fs_devs) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975) __btrfs_sysfs_remove_fsid(fs_devs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979) list_for_each_entry(fs_devs, fs_uuids, fs_list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980) __btrfs_sysfs_remove_fsid(fs_devs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984) static void btrfs_sysfs_remove_fs_devices(struct btrfs_fs_devices *fs_devices)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986) struct btrfs_device *device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987) struct btrfs_fs_devices *seed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989) list_for_each_entry(device, &fs_devices->devices, dev_list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990) btrfs_sysfs_remove_device(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992) list_for_each_entry(seed, &fs_devices->seed_list, seed_list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993) list_for_each_entry(device, &seed->devices, dev_list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994) btrfs_sysfs_remove_device(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998) void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000) struct kobject *fsid_kobj = &fs_info->fs_devices->fsid_kobj;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002) sysfs_remove_link(fsid_kobj, "bdi");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004) if (fs_info->space_info_kobj) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005) sysfs_remove_files(fs_info->space_info_kobj, allocation_attrs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006) kobject_del(fs_info->space_info_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007) kobject_put(fs_info->space_info_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009) #ifdef CONFIG_BTRFS_DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010) if (fs_info->discard_debug_kobj) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011) sysfs_remove_files(fs_info->discard_debug_kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012) discard_debug_attrs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013) kobject_del(fs_info->discard_debug_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014) kobject_put(fs_info->discard_debug_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016) if (fs_info->debug_kobj) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017) sysfs_remove_files(fs_info->debug_kobj, btrfs_debug_mount_attrs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018) kobject_del(fs_info->debug_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019) kobject_put(fs_info->debug_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022) addrm_unknown_feature_attrs(fs_info, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023) sysfs_remove_group(fsid_kobj, &btrfs_feature_attr_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024) sysfs_remove_files(fsid_kobj, btrfs_attrs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025) btrfs_sysfs_remove_fs_devices(fs_info->fs_devices);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028) static const char * const btrfs_feature_set_names[FEAT_MAX] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029) [FEAT_COMPAT] = "compat",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030) [FEAT_COMPAT_RO] = "compat_ro",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031) [FEAT_INCOMPAT] = "incompat",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034) const char *btrfs_feature_set_name(enum btrfs_feature_set set)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036) return btrfs_feature_set_names[set];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039) char *btrfs_printable_features(enum btrfs_feature_set set, u64 flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041) size_t bufsize = 4096; /* safe max, 64 names * 64 bytes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042) int len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044) char *str;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046) str = kmalloc(bufsize, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047) if (!str)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048) return str;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050) for (i = 0; i < ARRAY_SIZE(btrfs_feature_attrs[set]); i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051) const char *name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1053) if (!(flags & (1ULL << i)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1054) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1055)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1056) name = btrfs_feature_attrs[set][i].kobj_attr.attr.name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1057) len += scnprintf(str + len, bufsize - len, "%s%s",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1058) len ? "," : "", name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1059) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1060)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1061) return str;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1062) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1063)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1064) static void init_feature_attrs(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1065) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1066) struct btrfs_feature_attr *fa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1067) int set, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1068)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1069) BUILD_BUG_ON(ARRAY_SIZE(btrfs_unknown_feature_names) !=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1070) ARRAY_SIZE(btrfs_feature_attrs));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1071) BUILD_BUG_ON(ARRAY_SIZE(btrfs_unknown_feature_names[0]) !=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1072) ARRAY_SIZE(btrfs_feature_attrs[0]));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1073)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1074) memset(btrfs_feature_attrs, 0, sizeof(btrfs_feature_attrs));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1075) memset(btrfs_unknown_feature_names, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1076) sizeof(btrfs_unknown_feature_names));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1077)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1078) for (i = 0; btrfs_supported_feature_attrs[i]; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1079) struct btrfs_feature_attr *sfa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1080) struct attribute *a = btrfs_supported_feature_attrs[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1081) int bit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1082) sfa = attr_to_btrfs_feature_attr(a);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1083) bit = ilog2(sfa->feature_bit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1084) fa = &btrfs_feature_attrs[sfa->feature_set][bit];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1085)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1086) fa->kobj_attr.attr.name = sfa->kobj_attr.attr.name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1087) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1088)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1089) for (set = 0; set < FEAT_MAX; set++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1090) for (i = 0; i < ARRAY_SIZE(btrfs_feature_attrs[set]); i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1091) char *name = btrfs_unknown_feature_names[set][i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1092) fa = &btrfs_feature_attrs[set][i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1093)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1094) if (fa->kobj_attr.attr.name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1095) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1096)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1097) snprintf(name, BTRFS_FEATURE_NAME_MAX, "%s:%u",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1098) btrfs_feature_set_names[set], i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1099)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1100) fa->kobj_attr.attr.name = name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1101) fa->kobj_attr.attr.mode = S_IRUGO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1102) fa->feature_set = set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1103) fa->feature_bit = 1ULL << i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1104) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1105) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1106) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1108) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1109) * Create a sysfs entry for a given block group type at path
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1110) * /sys/fs/btrfs/UUID/allocation/data/TYPE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1111) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1112) void btrfs_sysfs_add_block_group_type(struct btrfs_block_group *cache)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1113) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1114) struct btrfs_fs_info *fs_info = cache->fs_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1115) struct btrfs_space_info *space_info = cache->space_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1116) struct raid_kobject *rkobj;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1117) const int index = btrfs_bg_flags_to_raid_index(cache->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1118) unsigned int nofs_flag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1119) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1121) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1122) * Setup a NOFS context because kobject_add(), deep in its call chain,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1123) * does GFP_KERNEL allocations, and we are often called in a context
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1124) * where if reclaim is triggered we can deadlock (we are either holding
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1125) * a transaction handle or some lock required for a transaction
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1126) * commit).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1127) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1128) nofs_flag = memalloc_nofs_save();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1130) rkobj = kzalloc(sizeof(*rkobj), GFP_NOFS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1131) if (!rkobj) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1132) memalloc_nofs_restore(nofs_flag);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1133) btrfs_warn(cache->fs_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1134) "couldn't alloc memory for raid level kobject");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1135) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1136) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1138) rkobj->flags = cache->flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1139) kobject_init(&rkobj->kobj, &btrfs_raid_ktype);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1141) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1142) * We call this either on mount, or if we've created a block group for a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1143) * new index type while running (i.e. when restriping). The running
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1144) * case is tricky because we could race with other threads, so we need
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1145) * to have this check to make sure we didn't already init the kobject.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1146) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1147) * We don't have to protect on the free side because it only happens on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1148) * unmount.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1149) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1150) spin_lock(&space_info->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1151) if (space_info->block_group_kobjs[index]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1152) spin_unlock(&space_info->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1153) kobject_put(&rkobj->kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1154) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1155) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1156) space_info->block_group_kobjs[index] = &rkobj->kobj;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1157) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1158) spin_unlock(&space_info->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1160) ret = kobject_add(&rkobj->kobj, &space_info->kobj, "%s",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1161) btrfs_bg_type_to_raid_name(rkobj->flags));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1162) memalloc_nofs_restore(nofs_flag);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1163) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1164) spin_lock(&space_info->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1165) space_info->block_group_kobjs[index] = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1166) spin_unlock(&space_info->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1167) kobject_put(&rkobj->kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1168) btrfs_warn(fs_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1169) "failed to add kobject for block cache, ignoring");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1170) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1171) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1172) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1174) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1175) * Remove sysfs directories for all block group types of a given space info and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1176) * the space info as well
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1177) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1178) void btrfs_sysfs_remove_space_info(struct btrfs_space_info *space_info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1179) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1180) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1182) for (i = 0; i < BTRFS_NR_RAID_TYPES; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1183) struct kobject *kobj;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1184)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1185) kobj = space_info->block_group_kobjs[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1186) space_info->block_group_kobjs[i] = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1187) if (kobj) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1188) kobject_del(kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1189) kobject_put(kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1190) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1191) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1192) kobject_del(&space_info->kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1193) kobject_put(&space_info->kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1194) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1196) static const char *alloc_name(u64 flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1197) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1198) switch (flags) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1199) case BTRFS_BLOCK_GROUP_METADATA | BTRFS_BLOCK_GROUP_DATA:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1200) return "mixed";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1201) case BTRFS_BLOCK_GROUP_METADATA:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1202) return "metadata";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1203) case BTRFS_BLOCK_GROUP_DATA:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1204) return "data";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1205) case BTRFS_BLOCK_GROUP_SYSTEM:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1206) return "system";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1207) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1208) WARN_ON(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1209) return "invalid-combination";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1210) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1211) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1213) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1214) * Create a sysfs entry for a space info type at path
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1215) * /sys/fs/btrfs/UUID/allocation/TYPE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1216) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1217) int btrfs_sysfs_add_space_info_type(struct btrfs_fs_info *fs_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1218) struct btrfs_space_info *space_info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1219) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1220) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1221)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1222) ret = kobject_init_and_add(&space_info->kobj, &space_info_ktype,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1223) fs_info->space_info_kobj, "%s",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1224) alloc_name(space_info->flags));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1225) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1226) kobject_put(&space_info->kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1227) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1228) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1230) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1231) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1232)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1233) void btrfs_sysfs_remove_device(struct btrfs_device *device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1234) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1235) struct hd_struct *disk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1236) struct kobject *disk_kobj;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1237) struct kobject *devices_kobj;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1238)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1239) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1240) * Seed fs_devices devices_kobj aren't used, fetch kobject from the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1241) * fs_info::fs_devices.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1242) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1243) devices_kobj = device->fs_info->fs_devices->devices_kobj;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1244) ASSERT(devices_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1246) if (device->bdev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1247) disk = device->bdev->bd_part;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1248) disk_kobj = &part_to_dev(disk)->kobj;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1249) sysfs_remove_link(devices_kobj, disk_kobj->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1250) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1252) if (device->devid_kobj.state_initialized) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1253) kobject_del(&device->devid_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1254) kobject_put(&device->devid_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1255) wait_for_completion(&device->kobj_unregister);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1256) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1257) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1258)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1259) static ssize_t btrfs_devinfo_in_fs_metadata_show(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1260) struct kobj_attribute *a,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1261) char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1262) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1263) int val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1264) struct btrfs_device *device = container_of(kobj, struct btrfs_device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1265) devid_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1266)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1267) val = !!test_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &device->dev_state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1268)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1269) return scnprintf(buf, PAGE_SIZE, "%d\n", val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1270) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1271) BTRFS_ATTR(devid, in_fs_metadata, btrfs_devinfo_in_fs_metadata_show);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1272)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1273) static ssize_t btrfs_devinfo_missing_show(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1274) struct kobj_attribute *a, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1275) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1276) int val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1277) struct btrfs_device *device = container_of(kobj, struct btrfs_device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1278) devid_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1279)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1280) val = !!test_bit(BTRFS_DEV_STATE_MISSING, &device->dev_state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1281)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1282) return scnprintf(buf, PAGE_SIZE, "%d\n", val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1283) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1284) BTRFS_ATTR(devid, missing, btrfs_devinfo_missing_show);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1285)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1286) static ssize_t btrfs_devinfo_replace_target_show(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1287) struct kobj_attribute *a,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1288) char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1289) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1290) int val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1291) struct btrfs_device *device = container_of(kobj, struct btrfs_device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1292) devid_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1293)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1294) val = !!test_bit(BTRFS_DEV_STATE_REPLACE_TGT, &device->dev_state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1295)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1296) return scnprintf(buf, PAGE_SIZE, "%d\n", val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1297) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1298) BTRFS_ATTR(devid, replace_target, btrfs_devinfo_replace_target_show);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1299)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1300) static ssize_t btrfs_devinfo_writeable_show(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1301) struct kobj_attribute *a, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1302) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1303) int val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1304) struct btrfs_device *device = container_of(kobj, struct btrfs_device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1305) devid_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1306)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1307) val = !!test_bit(BTRFS_DEV_STATE_WRITEABLE, &device->dev_state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1308)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1309) return scnprintf(buf, PAGE_SIZE, "%d\n", val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1310) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1311) BTRFS_ATTR(devid, writeable, btrfs_devinfo_writeable_show);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1312)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1313) static struct attribute *devid_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1314) BTRFS_ATTR_PTR(devid, in_fs_metadata),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1315) BTRFS_ATTR_PTR(devid, missing),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1316) BTRFS_ATTR_PTR(devid, replace_target),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1317) BTRFS_ATTR_PTR(devid, writeable),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1318) NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1319) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1320) ATTRIBUTE_GROUPS(devid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1321)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1322) static void btrfs_release_devid_kobj(struct kobject *kobj)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1323) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1324) struct btrfs_device *device = container_of(kobj, struct btrfs_device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1325) devid_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1326)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1327) memset(&device->devid_kobj, 0, sizeof(struct kobject));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1328) complete(&device->kobj_unregister);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1329) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1330)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1331) static struct kobj_type devid_ktype = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1332) .sysfs_ops = &kobj_sysfs_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1333) .default_groups = devid_groups,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1334) .release = btrfs_release_devid_kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1335) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1336)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1337) int btrfs_sysfs_add_device(struct btrfs_device *device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1338) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1339) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1340) unsigned int nofs_flag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1341) struct kobject *devices_kobj;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1342) struct kobject *devinfo_kobj;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1343)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1344) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1345) * Make sure we use the fs_info::fs_devices to fetch the kobjects even
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1346) * for the seed fs_devices
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1347) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1348) devices_kobj = device->fs_info->fs_devices->devices_kobj;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1349) devinfo_kobj = device->fs_info->fs_devices->devinfo_kobj;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1350) ASSERT(devices_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1351) ASSERT(devinfo_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1352)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1353) nofs_flag = memalloc_nofs_save();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1354)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1355) if (device->bdev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1356) struct hd_struct *disk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1357) struct kobject *disk_kobj;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1358)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1359) disk = device->bdev->bd_part;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1360) disk_kobj = &part_to_dev(disk)->kobj;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1361)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1362) ret = sysfs_create_link(devices_kobj, disk_kobj, disk_kobj->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1363) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1364) btrfs_warn(device->fs_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1365) "creating sysfs device link for devid %llu failed: %d",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1366) device->devid, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1367) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1368) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1369) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1370)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1371) init_completion(&device->kobj_unregister);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1372) ret = kobject_init_and_add(&device->devid_kobj, &devid_ktype,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1373) devinfo_kobj, "%llu", device->devid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1374) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1375) kobject_put(&device->devid_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1376) btrfs_warn(device->fs_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1377) "devinfo init for devid %llu failed: %d",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1378) device->devid, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1379) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1380)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1381) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1382) memalloc_nofs_restore(nofs_flag);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1383) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1384) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1385)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1386) static int btrfs_sysfs_add_fs_devices(struct btrfs_fs_devices *fs_devices)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1387) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1388) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1389) struct btrfs_device *device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1390) struct btrfs_fs_devices *seed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1391)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1392) list_for_each_entry(device, &fs_devices->devices, dev_list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1393) ret = btrfs_sysfs_add_device(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1394) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1395) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1396) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1397)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1398) list_for_each_entry(seed, &fs_devices->seed_list, seed_list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1399) list_for_each_entry(device, &seed->devices, dev_list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1400) ret = btrfs_sysfs_add_device(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1401) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1402) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1403) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1404) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1405)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1406) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1407)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1408) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1409) btrfs_sysfs_remove_fs_devices(fs_devices);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1410) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1411) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1412)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1413) void btrfs_kobject_uevent(struct block_device *bdev, enum kobject_action action)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1414) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1415) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1416)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1417) ret = kobject_uevent(&disk_to_dev(bdev->bd_disk)->kobj, action);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1418) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1419) pr_warn("BTRFS: Sending event '%d' to kobject: '%s' (%p): failed\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1420) action, kobject_name(&disk_to_dev(bdev->bd_disk)->kobj),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1421) &disk_to_dev(bdev->bd_disk)->kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1422) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1423)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1424) void btrfs_sysfs_update_sprout_fsid(struct btrfs_fs_devices *fs_devices)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1425)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1426) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1427) char fsid_buf[BTRFS_UUID_UNPARSED_SIZE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1428)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1429) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1430) * Sprouting changes fsid of the mounted filesystem, rename the fsid
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1431) * directory
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1432) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1433) snprintf(fsid_buf, BTRFS_UUID_UNPARSED_SIZE, "%pU", fs_devices->fsid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1434) if (kobject_rename(&fs_devices->fsid_kobj, fsid_buf))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1435) btrfs_warn(fs_devices->fs_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1436) "sysfs: failed to create fsid for sprout");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1437) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1438)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1439) void btrfs_sysfs_update_devid(struct btrfs_device *device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1440) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1441) char tmp[24];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1442)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1443) snprintf(tmp, sizeof(tmp), "%llu", device->devid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1444)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1445) if (kobject_rename(&device->devid_kobj, tmp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1446) btrfs_warn(device->fs_devices->fs_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1447) "sysfs: failed to update devid for %llu",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1448) device->devid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1449) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1450)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1451) /* /sys/fs/btrfs/ entry */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1452) static struct kset *btrfs_kset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1453)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1454) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1455) * Creates:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1456) * /sys/fs/btrfs/UUID
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1457) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1458) * Can be called by the device discovery thread.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1459) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1460) int btrfs_sysfs_add_fsid(struct btrfs_fs_devices *fs_devs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1461) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1462) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1463)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1464) init_completion(&fs_devs->kobj_unregister);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1465) fs_devs->fsid_kobj.kset = btrfs_kset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1466) error = kobject_init_and_add(&fs_devs->fsid_kobj, &btrfs_ktype, NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1467) "%pU", fs_devs->fsid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1468) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1469) kobject_put(&fs_devs->fsid_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1470) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1471) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1472)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1473) fs_devs->devices_kobj = kobject_create_and_add("devices",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1474) &fs_devs->fsid_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1475) if (!fs_devs->devices_kobj) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1476) btrfs_err(fs_devs->fs_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1477) "failed to init sysfs device interface");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1478) btrfs_sysfs_remove_fsid(fs_devs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1479) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1480) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1481)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1482) fs_devs->devinfo_kobj = kobject_create_and_add("devinfo",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1483) &fs_devs->fsid_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1484) if (!fs_devs->devinfo_kobj) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1485) btrfs_err(fs_devs->fs_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1486) "failed to init sysfs devinfo kobject");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1487) btrfs_sysfs_remove_fsid(fs_devs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1488) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1489) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1490)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1491) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1492) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1493)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1494) int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1495) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1496) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1497) struct btrfs_fs_devices *fs_devs = fs_info->fs_devices;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1498) struct kobject *fsid_kobj = &fs_devs->fsid_kobj;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1499)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1500) error = btrfs_sysfs_add_fs_devices(fs_devs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1501) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1502) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1503)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1504) error = sysfs_create_files(fsid_kobj, btrfs_attrs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1505) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1506) btrfs_sysfs_remove_fs_devices(fs_devs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1507) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1508) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1509)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1510) error = sysfs_create_group(fsid_kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1511) &btrfs_feature_attr_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1512) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1513) goto failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1514)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1515) #ifdef CONFIG_BTRFS_DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1516) fs_info->debug_kobj = kobject_create_and_add("debug", fsid_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1517) if (!fs_info->debug_kobj) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1518) error = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1519) goto failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1520) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1521)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1522) error = sysfs_create_files(fs_info->debug_kobj, btrfs_debug_mount_attrs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1523) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1524) goto failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1525)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1526) /* Discard directory */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1527) fs_info->discard_debug_kobj = kobject_create_and_add("discard",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1528) fs_info->debug_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1529) if (!fs_info->discard_debug_kobj) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1530) error = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1531) goto failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1532) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1533)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1534) error = sysfs_create_files(fs_info->discard_debug_kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1535) discard_debug_attrs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1536) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1537) goto failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1538) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1539)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1540) error = addrm_unknown_feature_attrs(fs_info, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1541) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1542) goto failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1543)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1544) error = sysfs_create_link(fsid_kobj, &fs_info->sb->s_bdi->dev->kobj, "bdi");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1545) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1546) goto failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1547)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1548) fs_info->space_info_kobj = kobject_create_and_add("allocation",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1549) fsid_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1550) if (!fs_info->space_info_kobj) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1551) error = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1552) goto failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1553) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1554)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1555) error = sysfs_create_files(fs_info->space_info_kobj, allocation_attrs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1556) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1557) goto failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1558)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1559) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1560) failure:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1561) btrfs_sysfs_remove_mounted(fs_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1562) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1563) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1564)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1565) static inline struct btrfs_fs_info *qgroup_kobj_to_fs_info(struct kobject *kobj)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1566) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1567) return to_fs_info(kobj->parent->parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1568) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1569)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1570) #define QGROUP_ATTR(_member, _show_name) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1571) static ssize_t btrfs_qgroup_show_##_member(struct kobject *qgroup_kobj, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1572) struct kobj_attribute *a, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1573) char *buf) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1574) { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1575) struct btrfs_fs_info *fs_info = qgroup_kobj_to_fs_info(qgroup_kobj); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1576) struct btrfs_qgroup *qgroup = container_of(qgroup_kobj, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1577) struct btrfs_qgroup, kobj); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1578) return btrfs_show_u64(&qgroup->_member, &fs_info->qgroup_lock, buf); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1579) } \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1580) BTRFS_ATTR(qgroup, _show_name, btrfs_qgroup_show_##_member)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1581)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1582) #define QGROUP_RSV_ATTR(_name, _type) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1583) static ssize_t btrfs_qgroup_rsv_show_##_name(struct kobject *qgroup_kobj, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1584) struct kobj_attribute *a, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1585) char *buf) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1586) { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1587) struct btrfs_fs_info *fs_info = qgroup_kobj_to_fs_info(qgroup_kobj); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1588) struct btrfs_qgroup *qgroup = container_of(qgroup_kobj, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1589) struct btrfs_qgroup, kobj); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1590) return btrfs_show_u64(&qgroup->rsv.values[_type], \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1591) &fs_info->qgroup_lock, buf); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1592) } \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1593) BTRFS_ATTR(qgroup, rsv_##_name, btrfs_qgroup_rsv_show_##_name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1594)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1595) QGROUP_ATTR(rfer, referenced);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1596) QGROUP_ATTR(excl, exclusive);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1597) QGROUP_ATTR(max_rfer, max_referenced);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1598) QGROUP_ATTR(max_excl, max_exclusive);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1599) QGROUP_ATTR(lim_flags, limit_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1600) QGROUP_RSV_ATTR(data, BTRFS_QGROUP_RSV_DATA);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1601) QGROUP_RSV_ATTR(meta_pertrans, BTRFS_QGROUP_RSV_META_PERTRANS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1602) QGROUP_RSV_ATTR(meta_prealloc, BTRFS_QGROUP_RSV_META_PREALLOC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1603)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1604) static struct attribute *qgroup_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1605) BTRFS_ATTR_PTR(qgroup, referenced),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1606) BTRFS_ATTR_PTR(qgroup, exclusive),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1607) BTRFS_ATTR_PTR(qgroup, max_referenced),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1608) BTRFS_ATTR_PTR(qgroup, max_exclusive),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1609) BTRFS_ATTR_PTR(qgroup, limit_flags),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1610) BTRFS_ATTR_PTR(qgroup, rsv_data),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1611) BTRFS_ATTR_PTR(qgroup, rsv_meta_pertrans),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1612) BTRFS_ATTR_PTR(qgroup, rsv_meta_prealloc),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1613) NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1614) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1615) ATTRIBUTE_GROUPS(qgroup);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1616)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1617) static void qgroup_release(struct kobject *kobj)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1618) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1619) struct btrfs_qgroup *qgroup = container_of(kobj, struct btrfs_qgroup, kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1620)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1621) memset(&qgroup->kobj, 0, sizeof(*kobj));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1622) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1623)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1624) static struct kobj_type qgroup_ktype = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1625) .sysfs_ops = &kobj_sysfs_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1626) .release = qgroup_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1627) .default_groups = qgroup_groups,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1628) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1629)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1630) int btrfs_sysfs_add_one_qgroup(struct btrfs_fs_info *fs_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1631) struct btrfs_qgroup *qgroup)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1632) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1633) struct kobject *qgroups_kobj = fs_info->qgroups_kobj;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1634) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1635)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1636) if (test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1637) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1638) if (qgroup->kobj.state_initialized)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1639) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1640) if (!qgroups_kobj)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1641) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1642)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1643) ret = kobject_init_and_add(&qgroup->kobj, &qgroup_ktype, qgroups_kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1644) "%hu_%llu", btrfs_qgroup_level(qgroup->qgroupid),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1645) btrfs_qgroup_subvolid(qgroup->qgroupid));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1646) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1647) kobject_put(&qgroup->kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1648)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1649) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1650) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1651)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1652) void btrfs_sysfs_del_qgroups(struct btrfs_fs_info *fs_info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1653) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1654) struct btrfs_qgroup *qgroup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1655) struct btrfs_qgroup *next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1656)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1657) if (test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1658) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1659)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1660) rbtree_postorder_for_each_entry_safe(qgroup, next,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1661) &fs_info->qgroup_tree, node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1662) btrfs_sysfs_del_one_qgroup(fs_info, qgroup);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1663) if (fs_info->qgroups_kobj) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1664) kobject_del(fs_info->qgroups_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1665) kobject_put(fs_info->qgroups_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1666) fs_info->qgroups_kobj = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1667) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1668) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1669)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1670) /* Called when qgroups get initialized, thus there is no need for locking */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1671) int btrfs_sysfs_add_qgroups(struct btrfs_fs_info *fs_info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1672) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1673) struct kobject *fsid_kobj = &fs_info->fs_devices->fsid_kobj;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1674) struct btrfs_qgroup *qgroup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1675) struct btrfs_qgroup *next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1676) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1677)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1678) if (test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1679) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1680)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1681) ASSERT(fsid_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1682) if (fs_info->qgroups_kobj)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1683) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1684)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1685) fs_info->qgroups_kobj = kobject_create_and_add("qgroups", fsid_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1686) if (!fs_info->qgroups_kobj) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1687) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1688) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1689) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1690) rbtree_postorder_for_each_entry_safe(qgroup, next,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1691) &fs_info->qgroup_tree, node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1692) ret = btrfs_sysfs_add_one_qgroup(fs_info, qgroup);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1693) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1694) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1695) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1696)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1697) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1698) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1699) btrfs_sysfs_del_qgroups(fs_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1700) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1701) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1702)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1703) void btrfs_sysfs_del_one_qgroup(struct btrfs_fs_info *fs_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1704) struct btrfs_qgroup *qgroup)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1705) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1706) if (test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1707) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1708)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1709) if (qgroup->kobj.state_initialized) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1710) kobject_del(&qgroup->kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1711) kobject_put(&qgroup->kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1712) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1713) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1714)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1715) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1716) * Change per-fs features in /sys/fs/btrfs/UUID/features to match current
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1717) * values in superblock. Call after any changes to incompat/compat_ro flags
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1718) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1719) void btrfs_sysfs_feature_update(struct btrfs_fs_info *fs_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1720) u64 bit, enum btrfs_feature_set set)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1721) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1722) struct btrfs_fs_devices *fs_devs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1723) struct kobject *fsid_kobj;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1724) u64 __maybe_unused features;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1725) int __maybe_unused ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1726)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1727) if (!fs_info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1728) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1729)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1730) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1731) * See 14e46e04958df74 and e410e34fad913dd, feature bit updates are not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1732) * safe when called from some contexts (eg. balance)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1733) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1734) features = get_features(fs_info, set);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1735) ASSERT(bit & supported_feature_masks[set]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1736)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1737) fs_devs = fs_info->fs_devices;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1738) fsid_kobj = &fs_devs->fsid_kobj;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1739)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1740) if (!fsid_kobj->state_initialized)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1741) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1742)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1743) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1744) * FIXME: this is too heavy to update just one value, ideally we'd like
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1745) * to use sysfs_update_group but some refactoring is needed first.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1746) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1747) sysfs_remove_group(fsid_kobj, &btrfs_feature_attr_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1748) ret = sysfs_create_group(fsid_kobj, &btrfs_feature_attr_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1749) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1750)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1751) int __init btrfs_init_sysfs(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1752) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1753) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1754)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1755) btrfs_kset = kset_create_and_add("btrfs", NULL, fs_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1756) if (!btrfs_kset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1757) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1758)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1759) init_feature_attrs();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1760) ret = sysfs_create_group(&btrfs_kset->kobj, &btrfs_feature_attr_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1761) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1762) goto out2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1763) ret = sysfs_merge_group(&btrfs_kset->kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1764) &btrfs_static_feature_attr_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1765) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1766) goto out_remove_group;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1767)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1768) #ifdef CONFIG_BTRFS_DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1769) ret = sysfs_create_group(&btrfs_kset->kobj, &btrfs_debug_feature_attr_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1770) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1771) goto out2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1772) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1773)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1774) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1775)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1776) out_remove_group:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1777) sysfs_remove_group(&btrfs_kset->kobj, &btrfs_feature_attr_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1778) out2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1779) kset_unregister(btrfs_kset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1780)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1781) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1782) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1783)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1784) void __cold btrfs_exit_sysfs(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1785) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1786) sysfs_unmerge_group(&btrfs_kset->kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1787) &btrfs_static_feature_attr_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1788) sysfs_remove_group(&btrfs_kset->kobj, &btrfs_feature_attr_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1789) #ifdef CONFIG_BTRFS_DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1790) sysfs_remove_group(&btrfs_kset->kobj, &btrfs_debug_feature_attr_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1791) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1792) kset_unregister(btrfs_kset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1793) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1794)
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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