1c1d7c514SDavid Sterba // SPDX-License-Identifier: GPL-2.0 26cbd5570SChris Mason /* 36cbd5570SChris Mason * Copyright (C) 2007 Oracle. All rights reserved. 46cbd5570SChris Mason */ 56cbd5570SChris Mason 658176a96SJosef Bacik #include <linux/sched.h> 732a9991fSDavid Sterba #include <linux/sched/mm.h> 858176a96SJosef Bacik #include <linux/slab.h> 958176a96SJosef Bacik #include <linux/spinlock.h> 1058176a96SJosef Bacik #include <linux/completion.h> 1179da4fa4SJeff Mahoney #include <linux/bug.h> 1241e6d2a8SJohannes Thumshirn #include <crypto/hash.h> 1358176a96SJosef Bacik 14bae45de0SChris Mason #include "ctree.h" 15dfb79ddbSDennis Zhou #include "discard.h" 16bae45de0SChris Mason #include "disk-io.h" 177573df55SOmar Sandoval #include "send.h" 18bae45de0SChris Mason #include "transaction.h" 19079b72bcSJeff Mahoney #include "sysfs.h" 2029e5be24SJeff Mahoney #include "volumes.h" 218719aaaeSJosef Bacik #include "space-info.h" 22aac0023cSJosef Bacik #include "block-group.h" 2349e5fb46SQu Wenruo #include "qgroup.h" 24079b72bcSJeff Mahoney 259188db61SDavid Sterba struct btrfs_feature_attr { 269188db61SDavid Sterba struct kobj_attribute kobj_attr; 279188db61SDavid Sterba enum btrfs_feature_set feature_set; 289188db61SDavid Sterba u64 feature_bit; 299188db61SDavid Sterba }; 309188db61SDavid Sterba 319188db61SDavid Sterba /* For raid type sysfs entries */ 329188db61SDavid Sterba struct raid_kobject { 339188db61SDavid Sterba u64 flags; 349188db61SDavid Sterba struct kobject kobj; 359188db61SDavid Sterba }; 369188db61SDavid Sterba 379188db61SDavid Sterba #define __INIT_KOBJ_ATTR(_name, _mode, _show, _store) \ 389188db61SDavid Sterba { \ 399188db61SDavid Sterba .attr = { .name = __stringify(_name), .mode = _mode }, \ 409188db61SDavid Sterba .show = _show, \ 419188db61SDavid Sterba .store = _store, \ 429188db61SDavid Sterba } 439188db61SDavid Sterba 449188db61SDavid Sterba #define BTRFS_ATTR_RW(_prefix, _name, _show, _store) \ 459188db61SDavid Sterba static struct kobj_attribute btrfs_attr_##_prefix##_##_name = \ 469188db61SDavid Sterba __INIT_KOBJ_ATTR(_name, 0644, _show, _store) 479188db61SDavid Sterba 489188db61SDavid Sterba #define BTRFS_ATTR(_prefix, _name, _show) \ 499188db61SDavid Sterba static struct kobj_attribute btrfs_attr_##_prefix##_##_name = \ 509188db61SDavid Sterba __INIT_KOBJ_ATTR(_name, 0444, _show, NULL) 519188db61SDavid Sterba 529188db61SDavid Sterba #define BTRFS_ATTR_PTR(_prefix, _name) \ 539188db61SDavid Sterba (&btrfs_attr_##_prefix##_##_name.attr) 549188db61SDavid Sterba 559188db61SDavid Sterba #define BTRFS_FEAT_ATTR(_name, _feature_set, _feature_prefix, _feature_bit) \ 569188db61SDavid Sterba static struct btrfs_feature_attr btrfs_attr_features_##_name = { \ 579188db61SDavid Sterba .kobj_attr = __INIT_KOBJ_ATTR(_name, S_IRUGO, \ 589188db61SDavid Sterba btrfs_feature_attr_show, \ 599188db61SDavid Sterba btrfs_feature_attr_store), \ 609188db61SDavid Sterba .feature_set = _feature_set, \ 619188db61SDavid Sterba .feature_bit = _feature_prefix ##_## _feature_bit, \ 629188db61SDavid Sterba } 639188db61SDavid Sterba #define BTRFS_FEAT_ATTR_PTR(_name) \ 649188db61SDavid Sterba (&btrfs_attr_features_##_name.kobj_attr.attr) 659188db61SDavid Sterba 669188db61SDavid Sterba #define BTRFS_FEAT_ATTR_COMPAT(name, feature) \ 679188db61SDavid Sterba BTRFS_FEAT_ATTR(name, FEAT_COMPAT, BTRFS_FEATURE_COMPAT, feature) 689188db61SDavid Sterba #define BTRFS_FEAT_ATTR_COMPAT_RO(name, feature) \ 699188db61SDavid Sterba BTRFS_FEAT_ATTR(name, FEAT_COMPAT_RO, BTRFS_FEATURE_COMPAT_RO, feature) 709188db61SDavid Sterba #define BTRFS_FEAT_ATTR_INCOMPAT(name, feature) \ 719188db61SDavid Sterba BTRFS_FEAT_ATTR(name, FEAT_INCOMPAT, BTRFS_FEATURE_INCOMPAT, feature) 729188db61SDavid Sterba 73510d7360SJeff Mahoney static inline struct btrfs_fs_info *to_fs_info(struct kobject *kobj); 742e7910d6SAnand Jain static inline struct btrfs_fs_devices *to_fs_devs(struct kobject *kobj); 755ac1d209SJeff Mahoney 768f52316cSDavid Sterba static struct btrfs_feature_attr *to_btrfs_feature_attr(struct kobj_attribute *a) 778f52316cSDavid Sterba { 788f52316cSDavid Sterba return container_of(a, struct btrfs_feature_attr, kobj_attr); 798f52316cSDavid Sterba } 808f52316cSDavid Sterba 818f52316cSDavid Sterba static struct kobj_attribute *attr_to_btrfs_attr(struct attribute *attr) 828f52316cSDavid Sterba { 838f52316cSDavid Sterba return container_of(attr, struct kobj_attribute, attr); 848f52316cSDavid Sterba } 858f52316cSDavid Sterba 868f52316cSDavid Sterba static struct btrfs_feature_attr *attr_to_btrfs_feature_attr( 878f52316cSDavid Sterba struct attribute *attr) 888f52316cSDavid Sterba { 898f52316cSDavid Sterba return to_btrfs_feature_attr(attr_to_btrfs_attr(attr)); 908f52316cSDavid Sterba } 918f52316cSDavid Sterba 92510d7360SJeff Mahoney static u64 get_features(struct btrfs_fs_info *fs_info, 93510d7360SJeff Mahoney enum btrfs_feature_set set) 945ac1d209SJeff Mahoney { 95510d7360SJeff Mahoney struct btrfs_super_block *disk_super = fs_info->super_copy; 96510d7360SJeff Mahoney if (set == FEAT_COMPAT) 97510d7360SJeff Mahoney return btrfs_super_compat_flags(disk_super); 98510d7360SJeff Mahoney else if (set == FEAT_COMPAT_RO) 99510d7360SJeff Mahoney return btrfs_super_compat_ro_flags(disk_super); 100510d7360SJeff Mahoney else 101510d7360SJeff Mahoney return btrfs_super_incompat_flags(disk_super); 1025ac1d209SJeff Mahoney } 1035ac1d209SJeff Mahoney 104ba631941SJeff Mahoney static void set_features(struct btrfs_fs_info *fs_info, 105ba631941SJeff Mahoney enum btrfs_feature_set set, u64 features) 106ba631941SJeff Mahoney { 107ba631941SJeff Mahoney struct btrfs_super_block *disk_super = fs_info->super_copy; 108ba631941SJeff Mahoney if (set == FEAT_COMPAT) 109ba631941SJeff Mahoney btrfs_set_super_compat_flags(disk_super, features); 110ba631941SJeff Mahoney else if (set == FEAT_COMPAT_RO) 111ba631941SJeff Mahoney btrfs_set_super_compat_ro_flags(disk_super, features); 112ba631941SJeff Mahoney else 113ba631941SJeff Mahoney btrfs_set_super_incompat_flags(disk_super, features); 114ba631941SJeff Mahoney } 115ba631941SJeff Mahoney 116ba631941SJeff Mahoney static int can_modify_feature(struct btrfs_feature_attr *fa) 117ba631941SJeff Mahoney { 118ba631941SJeff Mahoney int val = 0; 119ba631941SJeff Mahoney u64 set, clear; 120ba631941SJeff Mahoney switch (fa->feature_set) { 121ba631941SJeff Mahoney case FEAT_COMPAT: 122ba631941SJeff Mahoney set = BTRFS_FEATURE_COMPAT_SAFE_SET; 123ba631941SJeff Mahoney clear = BTRFS_FEATURE_COMPAT_SAFE_CLEAR; 124ba631941SJeff Mahoney break; 125ba631941SJeff Mahoney case FEAT_COMPAT_RO: 126ba631941SJeff Mahoney set = BTRFS_FEATURE_COMPAT_RO_SAFE_SET; 127ba631941SJeff Mahoney clear = BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR; 128ba631941SJeff Mahoney break; 129ba631941SJeff Mahoney case FEAT_INCOMPAT: 130ba631941SJeff Mahoney set = BTRFS_FEATURE_INCOMPAT_SAFE_SET; 131ba631941SJeff Mahoney clear = BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR; 132ba631941SJeff Mahoney break; 133ba631941SJeff Mahoney default: 13462e85577SJeff Mahoney pr_warn("btrfs: sysfs: unknown feature set %d\n", 135cc37bb04SDavid Sterba fa->feature_set); 136cc37bb04SDavid Sterba return 0; 137ba631941SJeff Mahoney } 138ba631941SJeff Mahoney 139ba631941SJeff Mahoney if (set & fa->feature_bit) 140ba631941SJeff Mahoney val |= 1; 141ba631941SJeff Mahoney if (clear & fa->feature_bit) 142ba631941SJeff Mahoney val |= 2; 143ba631941SJeff Mahoney 144ba631941SJeff Mahoney return val; 145ba631941SJeff Mahoney } 146ba631941SJeff Mahoney 147079b72bcSJeff Mahoney static ssize_t btrfs_feature_attr_show(struct kobject *kobj, 148079b72bcSJeff Mahoney struct kobj_attribute *a, char *buf) 149079b72bcSJeff Mahoney { 150510d7360SJeff Mahoney int val = 0; 151510d7360SJeff Mahoney struct btrfs_fs_info *fs_info = to_fs_info(kobj); 152510d7360SJeff Mahoney struct btrfs_feature_attr *fa = to_btrfs_feature_attr(a); 153ba631941SJeff Mahoney if (fs_info) { 154510d7360SJeff Mahoney u64 features = get_features(fs_info, fa->feature_set); 155510d7360SJeff Mahoney if (features & fa->feature_bit) 156510d7360SJeff Mahoney val = 1; 157ba631941SJeff Mahoney } else 158ba631941SJeff Mahoney val = can_modify_feature(fa); 159510d7360SJeff Mahoney 160abdd9febSTakashi Iwai return scnprintf(buf, PAGE_SIZE, "%d\n", val); 161510d7360SJeff Mahoney } 162510d7360SJeff Mahoney 163ba631941SJeff Mahoney static ssize_t btrfs_feature_attr_store(struct kobject *kobj, 164ba631941SJeff Mahoney struct kobj_attribute *a, 165ba631941SJeff Mahoney const char *buf, size_t count) 166ba631941SJeff Mahoney { 167ba631941SJeff Mahoney struct btrfs_fs_info *fs_info; 168ba631941SJeff Mahoney struct btrfs_feature_attr *fa = to_btrfs_feature_attr(a); 169ba631941SJeff Mahoney u64 features, set, clear; 170ba631941SJeff Mahoney unsigned long val; 171ba631941SJeff Mahoney int ret; 172ba631941SJeff Mahoney 173ba631941SJeff Mahoney fs_info = to_fs_info(kobj); 174ba631941SJeff Mahoney if (!fs_info) 175ba631941SJeff Mahoney return -EPERM; 176ba631941SJeff Mahoney 177bc98a42cSDavid Howells if (sb_rdonly(fs_info->sb)) 178ee611138SDavid Sterba return -EROFS; 179ee611138SDavid Sterba 180ba631941SJeff Mahoney ret = kstrtoul(skip_spaces(buf), 0, &val); 181ba631941SJeff Mahoney if (ret) 182ba631941SJeff Mahoney return ret; 183ba631941SJeff Mahoney 184ba631941SJeff Mahoney if (fa->feature_set == FEAT_COMPAT) { 185ba631941SJeff Mahoney set = BTRFS_FEATURE_COMPAT_SAFE_SET; 186ba631941SJeff Mahoney clear = BTRFS_FEATURE_COMPAT_SAFE_CLEAR; 187ba631941SJeff Mahoney } else if (fa->feature_set == FEAT_COMPAT_RO) { 188ba631941SJeff Mahoney set = BTRFS_FEATURE_COMPAT_RO_SAFE_SET; 189ba631941SJeff Mahoney clear = BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR; 190ba631941SJeff Mahoney } else { 191ba631941SJeff Mahoney set = BTRFS_FEATURE_INCOMPAT_SAFE_SET; 192ba631941SJeff Mahoney clear = BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR; 193ba631941SJeff Mahoney } 194ba631941SJeff Mahoney 195ba631941SJeff Mahoney features = get_features(fs_info, fa->feature_set); 196ba631941SJeff Mahoney 197ba631941SJeff Mahoney /* Nothing to do */ 198ba631941SJeff Mahoney if ((val && (features & fa->feature_bit)) || 199ba631941SJeff Mahoney (!val && !(features & fa->feature_bit))) 200ba631941SJeff Mahoney return count; 201ba631941SJeff Mahoney 202ba631941SJeff Mahoney if ((val && !(set & fa->feature_bit)) || 203ba631941SJeff Mahoney (!val && !(clear & fa->feature_bit))) { 204ba631941SJeff Mahoney btrfs_info(fs_info, 205ba631941SJeff Mahoney "%sabling feature %s on mounted fs is not supported.", 206ba631941SJeff Mahoney val ? "En" : "Dis", fa->kobj_attr.attr.name); 207ba631941SJeff Mahoney return -EPERM; 208ba631941SJeff Mahoney } 209ba631941SJeff Mahoney 210ba631941SJeff Mahoney btrfs_info(fs_info, "%s %s feature flag", 211ba631941SJeff Mahoney val ? "Setting" : "Clearing", fa->kobj_attr.attr.name); 212ba631941SJeff Mahoney 213ba631941SJeff Mahoney spin_lock(&fs_info->super_lock); 214ba631941SJeff Mahoney features = get_features(fs_info, fa->feature_set); 215ba631941SJeff Mahoney if (val) 216ba631941SJeff Mahoney features |= fa->feature_bit; 217ba631941SJeff Mahoney else 218ba631941SJeff Mahoney features &= ~fa->feature_bit; 219ba631941SJeff Mahoney set_features(fs_info, fa->feature_set, features); 220ba631941SJeff Mahoney spin_unlock(&fs_info->super_lock); 221ba631941SJeff Mahoney 2220eae2747SDavid Sterba /* 2230eae2747SDavid Sterba * We don't want to do full transaction commit from inside sysfs 2240eae2747SDavid Sterba */ 2250eae2747SDavid Sterba btrfs_set_pending(fs_info, COMMIT); 2260eae2747SDavid Sterba wake_up_process(fs_info->transaction_kthread); 227ba631941SJeff Mahoney 228ba631941SJeff Mahoney return count; 229ba631941SJeff Mahoney } 230ba631941SJeff Mahoney 231510d7360SJeff Mahoney static umode_t btrfs_feature_visible(struct kobject *kobj, 232510d7360SJeff Mahoney struct attribute *attr, int unused) 233510d7360SJeff Mahoney { 234510d7360SJeff Mahoney struct btrfs_fs_info *fs_info = to_fs_info(kobj); 235510d7360SJeff Mahoney umode_t mode = attr->mode; 236510d7360SJeff Mahoney 237510d7360SJeff Mahoney if (fs_info) { 238510d7360SJeff Mahoney struct btrfs_feature_attr *fa; 239510d7360SJeff Mahoney u64 features; 240510d7360SJeff Mahoney 241510d7360SJeff Mahoney fa = attr_to_btrfs_feature_attr(attr); 242510d7360SJeff Mahoney features = get_features(fs_info, fa->feature_set); 243510d7360SJeff Mahoney 244ba631941SJeff Mahoney if (can_modify_feature(fa)) 245ba631941SJeff Mahoney mode |= S_IWUSR; 246ba631941SJeff Mahoney else if (!(features & fa->feature_bit)) 247510d7360SJeff Mahoney mode = 0; 248510d7360SJeff Mahoney } 249510d7360SJeff Mahoney 250510d7360SJeff Mahoney return mode; 251079b72bcSJeff Mahoney } 252079b72bcSJeff Mahoney 253079b72bcSJeff Mahoney BTRFS_FEAT_ATTR_INCOMPAT(mixed_backref, MIXED_BACKREF); 254079b72bcSJeff Mahoney BTRFS_FEAT_ATTR_INCOMPAT(default_subvol, DEFAULT_SUBVOL); 255079b72bcSJeff Mahoney BTRFS_FEAT_ATTR_INCOMPAT(mixed_groups, MIXED_GROUPS); 256079b72bcSJeff Mahoney BTRFS_FEAT_ATTR_INCOMPAT(compress_lzo, COMPRESS_LZO); 2575c1aab1dSNick Terrell BTRFS_FEAT_ATTR_INCOMPAT(compress_zstd, COMPRESS_ZSTD); 258079b72bcSJeff Mahoney BTRFS_FEAT_ATTR_INCOMPAT(big_metadata, BIG_METADATA); 259079b72bcSJeff Mahoney BTRFS_FEAT_ATTR_INCOMPAT(extended_iref, EXTENDED_IREF); 260079b72bcSJeff Mahoney BTRFS_FEAT_ATTR_INCOMPAT(raid56, RAID56); 261079b72bcSJeff Mahoney BTRFS_FEAT_ATTR_INCOMPAT(skinny_metadata, SKINNY_METADATA); 262c736c095SDavid Sterba BTRFS_FEAT_ATTR_INCOMPAT(no_holes, NO_HOLES); 26356f20f40SNikolay Borisov BTRFS_FEAT_ATTR_INCOMPAT(metadata_uuid, METADATA_UUID); 2643b5bb73bSDavid Sterba BTRFS_FEAT_ATTR_COMPAT_RO(free_space_tree, FREE_SPACE_TREE); 265cfbb825cSDavid Sterba BTRFS_FEAT_ATTR_INCOMPAT(raid1c34, RAID1C34); 266*7b3d5a90SNaohiro Aota /* Remove once support for zoned allocation is feature complete */ 267*7b3d5a90SNaohiro Aota #ifdef CONFIG_BTRFS_DEBUG 268*7b3d5a90SNaohiro Aota BTRFS_FEAT_ATTR_INCOMPAT(zoned, ZONED); 269*7b3d5a90SNaohiro Aota #endif 270079b72bcSJeff Mahoney 271079b72bcSJeff Mahoney static struct attribute *btrfs_supported_feature_attrs[] = { 272079b72bcSJeff Mahoney BTRFS_FEAT_ATTR_PTR(mixed_backref), 273079b72bcSJeff Mahoney BTRFS_FEAT_ATTR_PTR(default_subvol), 274079b72bcSJeff Mahoney BTRFS_FEAT_ATTR_PTR(mixed_groups), 275079b72bcSJeff Mahoney BTRFS_FEAT_ATTR_PTR(compress_lzo), 2765c1aab1dSNick Terrell BTRFS_FEAT_ATTR_PTR(compress_zstd), 277079b72bcSJeff Mahoney BTRFS_FEAT_ATTR_PTR(big_metadata), 278079b72bcSJeff Mahoney BTRFS_FEAT_ATTR_PTR(extended_iref), 279079b72bcSJeff Mahoney BTRFS_FEAT_ATTR_PTR(raid56), 280079b72bcSJeff Mahoney BTRFS_FEAT_ATTR_PTR(skinny_metadata), 281c736c095SDavid Sterba BTRFS_FEAT_ATTR_PTR(no_holes), 28256f20f40SNikolay Borisov BTRFS_FEAT_ATTR_PTR(metadata_uuid), 2833b5bb73bSDavid Sterba BTRFS_FEAT_ATTR_PTR(free_space_tree), 284cfbb825cSDavid Sterba BTRFS_FEAT_ATTR_PTR(raid1c34), 285*7b3d5a90SNaohiro Aota #ifdef CONFIG_BTRFS_DEBUG 286*7b3d5a90SNaohiro Aota BTRFS_FEAT_ATTR_PTR(zoned), 287*7b3d5a90SNaohiro Aota #endif 288079b72bcSJeff Mahoney NULL 289079b72bcSJeff Mahoney }; 290079b72bcSJeff Mahoney 291f902bd3aSMisono Tomohiro /* 292f902bd3aSMisono Tomohiro * Features which depend on feature bits and may differ between each fs. 293f902bd3aSMisono Tomohiro * 294f902bd3aSMisono Tomohiro * /sys/fs/btrfs/features lists all available features of this kernel while 295f902bd3aSMisono Tomohiro * /sys/fs/btrfs/UUID/features shows features of the fs which are enabled or 296f902bd3aSMisono Tomohiro * can be changed online. 297f902bd3aSMisono Tomohiro */ 298079b72bcSJeff Mahoney static const struct attribute_group btrfs_feature_attr_group = { 299079b72bcSJeff Mahoney .name = "features", 300510d7360SJeff Mahoney .is_visible = btrfs_feature_visible, 301079b72bcSJeff Mahoney .attrs = btrfs_supported_feature_attrs, 302079b72bcSJeff Mahoney }; 30358176a96SJosef Bacik 304f902bd3aSMisono Tomohiro static ssize_t rmdir_subvol_show(struct kobject *kobj, 305f902bd3aSMisono Tomohiro struct kobj_attribute *ka, char *buf) 306f902bd3aSMisono Tomohiro { 307abdd9febSTakashi Iwai return scnprintf(buf, PAGE_SIZE, "0\n"); 308f902bd3aSMisono Tomohiro } 309f902bd3aSMisono Tomohiro BTRFS_ATTR(static_feature, rmdir_subvol, rmdir_subvol_show); 310f902bd3aSMisono Tomohiro 311f7cea56cSDavid Sterba static ssize_t supported_checksums_show(struct kobject *kobj, 312f7cea56cSDavid Sterba struct kobj_attribute *a, char *buf) 313f7cea56cSDavid Sterba { 314f7cea56cSDavid Sterba ssize_t ret = 0; 315f7cea56cSDavid Sterba int i; 316f7cea56cSDavid Sterba 317f7cea56cSDavid Sterba for (i = 0; i < btrfs_get_num_csums(); i++) { 318f7cea56cSDavid Sterba /* 319f7cea56cSDavid Sterba * This "trick" only works as long as 'enum btrfs_csum_type' has 320f7cea56cSDavid Sterba * no holes in it 321f7cea56cSDavid Sterba */ 322abdd9febSTakashi Iwai ret += scnprintf(buf + ret, PAGE_SIZE - ret, "%s%s", 323f7cea56cSDavid Sterba (i == 0 ? "" : " "), btrfs_super_csum_name(i)); 324f7cea56cSDavid Sterba 325f7cea56cSDavid Sterba } 326f7cea56cSDavid Sterba 327abdd9febSTakashi Iwai ret += scnprintf(buf + ret, PAGE_SIZE - ret, "\n"); 328f7cea56cSDavid Sterba return ret; 329f7cea56cSDavid Sterba } 330f7cea56cSDavid Sterba BTRFS_ATTR(static_feature, supported_checksums, supported_checksums_show); 331f7cea56cSDavid Sterba 3327573df55SOmar Sandoval static ssize_t send_stream_version_show(struct kobject *kobj, 3337573df55SOmar Sandoval struct kobj_attribute *ka, char *buf) 3347573df55SOmar Sandoval { 3357573df55SOmar Sandoval return snprintf(buf, PAGE_SIZE, "%d\n", BTRFS_SEND_STREAM_VERSION); 3367573df55SOmar Sandoval } 3377573df55SOmar Sandoval BTRFS_ATTR(static_feature, send_stream_version, send_stream_version_show); 3387573df55SOmar Sandoval 339ceafe3ccSJosef Bacik static const char *rescue_opts[] = { 340ceafe3ccSJosef Bacik "usebackuproot", 341ceafe3ccSJosef Bacik "nologreplay", 34242437a63SJosef Bacik "ignorebadroots", 343882dbe0cSJosef Bacik "ignoredatacsums", 3449037d3cbSJosef Bacik "all", 345ceafe3ccSJosef Bacik }; 346ceafe3ccSJosef Bacik 347ceafe3ccSJosef Bacik static ssize_t supported_rescue_options_show(struct kobject *kobj, 348ceafe3ccSJosef Bacik struct kobj_attribute *a, 349ceafe3ccSJosef Bacik char *buf) 350ceafe3ccSJosef Bacik { 351ceafe3ccSJosef Bacik ssize_t ret = 0; 352ceafe3ccSJosef Bacik int i; 353ceafe3ccSJosef Bacik 354ceafe3ccSJosef Bacik for (i = 0; i < ARRAY_SIZE(rescue_opts); i++) 355ceafe3ccSJosef Bacik ret += scnprintf(buf + ret, PAGE_SIZE - ret, "%s%s", 356ceafe3ccSJosef Bacik (i ? " " : ""), rescue_opts[i]); 357ceafe3ccSJosef Bacik ret += scnprintf(buf + ret, PAGE_SIZE - ret, "\n"); 358ceafe3ccSJosef Bacik return ret; 359ceafe3ccSJosef Bacik } 360ceafe3ccSJosef Bacik BTRFS_ATTR(static_feature, supported_rescue_options, 361ceafe3ccSJosef Bacik supported_rescue_options_show); 362ceafe3ccSJosef Bacik 363f902bd3aSMisono Tomohiro static struct attribute *btrfs_supported_static_feature_attrs[] = { 364f902bd3aSMisono Tomohiro BTRFS_ATTR_PTR(static_feature, rmdir_subvol), 365f7cea56cSDavid Sterba BTRFS_ATTR_PTR(static_feature, supported_checksums), 3667573df55SOmar Sandoval BTRFS_ATTR_PTR(static_feature, send_stream_version), 367ceafe3ccSJosef Bacik BTRFS_ATTR_PTR(static_feature, supported_rescue_options), 368f902bd3aSMisono Tomohiro NULL 369f902bd3aSMisono Tomohiro }; 370f902bd3aSMisono Tomohiro 371f902bd3aSMisono Tomohiro /* 372f902bd3aSMisono Tomohiro * Features which only depend on kernel version. 373f902bd3aSMisono Tomohiro * 374f902bd3aSMisono Tomohiro * These are listed in /sys/fs/btrfs/features along with 375f902bd3aSMisono Tomohiro * btrfs_feature_attr_group 376f902bd3aSMisono Tomohiro */ 377f902bd3aSMisono Tomohiro static const struct attribute_group btrfs_static_feature_attr_group = { 378f902bd3aSMisono Tomohiro .name = "features", 379f902bd3aSMisono Tomohiro .attrs = btrfs_supported_static_feature_attrs, 380f902bd3aSMisono Tomohiro }; 381f902bd3aSMisono Tomohiro 3826e369febSDavid Sterba #ifdef CONFIG_BTRFS_DEBUG 3836e369febSDavid Sterba 3846e369febSDavid Sterba /* 385e4faab84SDennis Zhou * Discard statistics and tunables 386e4faab84SDennis Zhou */ 387dfb79ddbSDennis Zhou #define discard_to_fs_info(_kobj) to_fs_info((_kobj)->parent->parent) 388dfb79ddbSDennis Zhou 3895dc7c10bSDennis Zhou static ssize_t btrfs_discardable_bytes_show(struct kobject *kobj, 3905dc7c10bSDennis Zhou struct kobj_attribute *a, 3915dc7c10bSDennis Zhou char *buf) 3925dc7c10bSDennis Zhou { 3935dc7c10bSDennis Zhou struct btrfs_fs_info *fs_info = discard_to_fs_info(kobj); 3945dc7c10bSDennis Zhou 395abdd9febSTakashi Iwai return scnprintf(buf, PAGE_SIZE, "%lld\n", 3965dc7c10bSDennis Zhou atomic64_read(&fs_info->discard_ctl.discardable_bytes)); 3975dc7c10bSDennis Zhou } 3985dc7c10bSDennis Zhou BTRFS_ATTR(discard, discardable_bytes, btrfs_discardable_bytes_show); 3995dc7c10bSDennis Zhou 400dfb79ddbSDennis Zhou static ssize_t btrfs_discardable_extents_show(struct kobject *kobj, 401dfb79ddbSDennis Zhou struct kobj_attribute *a, 402dfb79ddbSDennis Zhou char *buf) 403dfb79ddbSDennis Zhou { 404dfb79ddbSDennis Zhou struct btrfs_fs_info *fs_info = discard_to_fs_info(kobj); 405dfb79ddbSDennis Zhou 406abdd9febSTakashi Iwai return scnprintf(buf, PAGE_SIZE, "%d\n", 407dfb79ddbSDennis Zhou atomic_read(&fs_info->discard_ctl.discardable_extents)); 408dfb79ddbSDennis Zhou } 409dfb79ddbSDennis Zhou BTRFS_ATTR(discard, discardable_extents, btrfs_discardable_extents_show); 410dfb79ddbSDennis Zhou 4119ddf648fSDennis Zhou static ssize_t btrfs_discard_bitmap_bytes_show(struct kobject *kobj, 4129ddf648fSDennis Zhou struct kobj_attribute *a, 4139ddf648fSDennis Zhou char *buf) 4149ddf648fSDennis Zhou { 4159ddf648fSDennis Zhou struct btrfs_fs_info *fs_info = discard_to_fs_info(kobj); 4169ddf648fSDennis Zhou 417abdd9febSTakashi Iwai return scnprintf(buf, PAGE_SIZE, "%lld\n", 4189ddf648fSDennis Zhou fs_info->discard_ctl.discard_bitmap_bytes); 4199ddf648fSDennis Zhou } 4209ddf648fSDennis Zhou BTRFS_ATTR(discard, discard_bitmap_bytes, btrfs_discard_bitmap_bytes_show); 4219ddf648fSDennis Zhou 4229ddf648fSDennis Zhou static ssize_t btrfs_discard_bytes_saved_show(struct kobject *kobj, 4239ddf648fSDennis Zhou struct kobj_attribute *a, 4249ddf648fSDennis Zhou char *buf) 4259ddf648fSDennis Zhou { 4269ddf648fSDennis Zhou struct btrfs_fs_info *fs_info = discard_to_fs_info(kobj); 4279ddf648fSDennis Zhou 428abdd9febSTakashi Iwai return scnprintf(buf, PAGE_SIZE, "%lld\n", 4299ddf648fSDennis Zhou atomic64_read(&fs_info->discard_ctl.discard_bytes_saved)); 4309ddf648fSDennis Zhou } 4319ddf648fSDennis Zhou BTRFS_ATTR(discard, discard_bytes_saved, btrfs_discard_bytes_saved_show); 4329ddf648fSDennis Zhou 4339ddf648fSDennis Zhou static ssize_t btrfs_discard_extent_bytes_show(struct kobject *kobj, 4349ddf648fSDennis Zhou struct kobj_attribute *a, 4359ddf648fSDennis Zhou char *buf) 4369ddf648fSDennis Zhou { 4379ddf648fSDennis Zhou struct btrfs_fs_info *fs_info = discard_to_fs_info(kobj); 4389ddf648fSDennis Zhou 439abdd9febSTakashi Iwai return scnprintf(buf, PAGE_SIZE, "%lld\n", 4409ddf648fSDennis Zhou fs_info->discard_ctl.discard_extent_bytes); 4419ddf648fSDennis Zhou } 4429ddf648fSDennis Zhou BTRFS_ATTR(discard, discard_extent_bytes, btrfs_discard_extent_bytes_show); 4439ddf648fSDennis Zhou 444a2309300SDennis Zhou static ssize_t btrfs_discard_iops_limit_show(struct kobject *kobj, 445a2309300SDennis Zhou struct kobj_attribute *a, 446a2309300SDennis Zhou char *buf) 447a2309300SDennis Zhou { 448a2309300SDennis Zhou struct btrfs_fs_info *fs_info = discard_to_fs_info(kobj); 449a2309300SDennis Zhou 450abdd9febSTakashi Iwai return scnprintf(buf, PAGE_SIZE, "%u\n", 451a2309300SDennis Zhou READ_ONCE(fs_info->discard_ctl.iops_limit)); 452a2309300SDennis Zhou } 453a2309300SDennis Zhou 454a2309300SDennis Zhou static ssize_t btrfs_discard_iops_limit_store(struct kobject *kobj, 455a2309300SDennis Zhou struct kobj_attribute *a, 456a2309300SDennis Zhou const char *buf, size_t len) 457a2309300SDennis Zhou { 458a2309300SDennis Zhou struct btrfs_fs_info *fs_info = discard_to_fs_info(kobj); 459a2309300SDennis Zhou struct btrfs_discard_ctl *discard_ctl = &fs_info->discard_ctl; 460a2309300SDennis Zhou u32 iops_limit; 461a2309300SDennis Zhou int ret; 462a2309300SDennis Zhou 463a2309300SDennis Zhou ret = kstrtou32(buf, 10, &iops_limit); 464a2309300SDennis Zhou if (ret) 465a2309300SDennis Zhou return -EINVAL; 466a2309300SDennis Zhou 467a2309300SDennis Zhou WRITE_ONCE(discard_ctl->iops_limit, iops_limit); 4683e48d8d2SPavel Begunkov btrfs_discard_calc_delay(discard_ctl); 4693e48d8d2SPavel Begunkov btrfs_discard_schedule_work(discard_ctl, true); 470a2309300SDennis Zhou return len; 471a2309300SDennis Zhou } 472a2309300SDennis Zhou BTRFS_ATTR_RW(discard, iops_limit, btrfs_discard_iops_limit_show, 473a2309300SDennis Zhou btrfs_discard_iops_limit_store); 474a2309300SDennis Zhou 475e93591bbSDennis Zhou static ssize_t btrfs_discard_kbps_limit_show(struct kobject *kobj, 476e93591bbSDennis Zhou struct kobj_attribute *a, 477e93591bbSDennis Zhou char *buf) 478e93591bbSDennis Zhou { 479e93591bbSDennis Zhou struct btrfs_fs_info *fs_info = discard_to_fs_info(kobj); 480e93591bbSDennis Zhou 481abdd9febSTakashi Iwai return scnprintf(buf, PAGE_SIZE, "%u\n", 482e93591bbSDennis Zhou READ_ONCE(fs_info->discard_ctl.kbps_limit)); 483e93591bbSDennis Zhou } 484e93591bbSDennis Zhou 485e93591bbSDennis Zhou static ssize_t btrfs_discard_kbps_limit_store(struct kobject *kobj, 486e93591bbSDennis Zhou struct kobj_attribute *a, 487e93591bbSDennis Zhou const char *buf, size_t len) 488e93591bbSDennis Zhou { 489e93591bbSDennis Zhou struct btrfs_fs_info *fs_info = discard_to_fs_info(kobj); 490e93591bbSDennis Zhou struct btrfs_discard_ctl *discard_ctl = &fs_info->discard_ctl; 491e93591bbSDennis Zhou u32 kbps_limit; 492e93591bbSDennis Zhou int ret; 493e93591bbSDennis Zhou 494e93591bbSDennis Zhou ret = kstrtou32(buf, 10, &kbps_limit); 495e93591bbSDennis Zhou if (ret) 496e93591bbSDennis Zhou return -EINVAL; 497e93591bbSDennis Zhou 498e93591bbSDennis Zhou WRITE_ONCE(discard_ctl->kbps_limit, kbps_limit); 4993e48d8d2SPavel Begunkov btrfs_discard_schedule_work(discard_ctl, true); 500e93591bbSDennis Zhou return len; 501e93591bbSDennis Zhou } 502e93591bbSDennis Zhou BTRFS_ATTR_RW(discard, kbps_limit, btrfs_discard_kbps_limit_show, 503e93591bbSDennis Zhou btrfs_discard_kbps_limit_store); 504e93591bbSDennis Zhou 50519b2a2c7SDennis Zhou static ssize_t btrfs_discard_max_discard_size_show(struct kobject *kobj, 50619b2a2c7SDennis Zhou struct kobj_attribute *a, 50719b2a2c7SDennis Zhou char *buf) 50819b2a2c7SDennis Zhou { 50919b2a2c7SDennis Zhou struct btrfs_fs_info *fs_info = discard_to_fs_info(kobj); 51019b2a2c7SDennis Zhou 511abdd9febSTakashi Iwai return scnprintf(buf, PAGE_SIZE, "%llu\n", 51219b2a2c7SDennis Zhou READ_ONCE(fs_info->discard_ctl.max_discard_size)); 51319b2a2c7SDennis Zhou } 51419b2a2c7SDennis Zhou 51519b2a2c7SDennis Zhou static ssize_t btrfs_discard_max_discard_size_store(struct kobject *kobj, 51619b2a2c7SDennis Zhou struct kobj_attribute *a, 51719b2a2c7SDennis Zhou const char *buf, size_t len) 51819b2a2c7SDennis Zhou { 51919b2a2c7SDennis Zhou struct btrfs_fs_info *fs_info = discard_to_fs_info(kobj); 52019b2a2c7SDennis Zhou struct btrfs_discard_ctl *discard_ctl = &fs_info->discard_ctl; 52119b2a2c7SDennis Zhou u64 max_discard_size; 52219b2a2c7SDennis Zhou int ret; 52319b2a2c7SDennis Zhou 52419b2a2c7SDennis Zhou ret = kstrtou64(buf, 10, &max_discard_size); 52519b2a2c7SDennis Zhou if (ret) 52619b2a2c7SDennis Zhou return -EINVAL; 52719b2a2c7SDennis Zhou 52819b2a2c7SDennis Zhou WRITE_ONCE(discard_ctl->max_discard_size, max_discard_size); 52919b2a2c7SDennis Zhou 53019b2a2c7SDennis Zhou return len; 53119b2a2c7SDennis Zhou } 53219b2a2c7SDennis Zhou BTRFS_ATTR_RW(discard, max_discard_size, btrfs_discard_max_discard_size_show, 53319b2a2c7SDennis Zhou btrfs_discard_max_discard_size_store); 53419b2a2c7SDennis Zhou 535e4faab84SDennis Zhou static const struct attribute *discard_debug_attrs[] = { 5365dc7c10bSDennis Zhou BTRFS_ATTR_PTR(discard, discardable_bytes), 537dfb79ddbSDennis Zhou BTRFS_ATTR_PTR(discard, discardable_extents), 5389ddf648fSDennis Zhou BTRFS_ATTR_PTR(discard, discard_bitmap_bytes), 5399ddf648fSDennis Zhou BTRFS_ATTR_PTR(discard, discard_bytes_saved), 5409ddf648fSDennis Zhou BTRFS_ATTR_PTR(discard, discard_extent_bytes), 541a2309300SDennis Zhou BTRFS_ATTR_PTR(discard, iops_limit), 542e93591bbSDennis Zhou BTRFS_ATTR_PTR(discard, kbps_limit), 54319b2a2c7SDennis Zhou BTRFS_ATTR_PTR(discard, max_discard_size), 544e4faab84SDennis Zhou NULL, 545e4faab84SDennis Zhou }; 546e4faab84SDennis Zhou 547e4faab84SDennis Zhou /* 5486e369febSDavid Sterba * Runtime debugging exported via sysfs 5496e369febSDavid Sterba * 5506e369febSDavid Sterba * /sys/fs/btrfs/debug - applies to module or all filesystems 5516e369febSDavid Sterba * /sys/fs/btrfs/UUID - applies only to the given filesystem 5526e369febSDavid Sterba */ 55393945cb4SDennis Zhou static const struct attribute *btrfs_debug_mount_attrs[] = { 55493945cb4SDennis Zhou NULL, 55593945cb4SDennis Zhou }; 55693945cb4SDennis Zhou 5576e369febSDavid Sterba static struct attribute *btrfs_debug_feature_attrs[] = { 5586e369febSDavid Sterba NULL 5596e369febSDavid Sterba }; 5606e369febSDavid Sterba 5616e369febSDavid Sterba static const struct attribute_group btrfs_debug_feature_attr_group = { 5626e369febSDavid Sterba .name = "debug", 5636e369febSDavid Sterba .attrs = btrfs_debug_feature_attrs, 5646e369febSDavid Sterba }; 5656e369febSDavid Sterba 5666e369febSDavid Sterba #endif 5676e369febSDavid Sterba 5686ab0a202SJeff Mahoney static ssize_t btrfs_show_u64(u64 *value_ptr, spinlock_t *lock, char *buf) 5696ab0a202SJeff Mahoney { 5706ab0a202SJeff Mahoney u64 val; 5716ab0a202SJeff Mahoney if (lock) 5726ab0a202SJeff Mahoney spin_lock(lock); 5736ab0a202SJeff Mahoney val = *value_ptr; 5746ab0a202SJeff Mahoney if (lock) 5756ab0a202SJeff Mahoney spin_unlock(lock); 576abdd9febSTakashi Iwai return scnprintf(buf, PAGE_SIZE, "%llu\n", val); 5776ab0a202SJeff Mahoney } 5786ab0a202SJeff Mahoney 5796ab0a202SJeff Mahoney static ssize_t global_rsv_size_show(struct kobject *kobj, 5806ab0a202SJeff Mahoney struct kobj_attribute *ka, char *buf) 5816ab0a202SJeff Mahoney { 5826ab0a202SJeff Mahoney struct btrfs_fs_info *fs_info = to_fs_info(kobj->parent); 5836ab0a202SJeff Mahoney struct btrfs_block_rsv *block_rsv = &fs_info->global_block_rsv; 5846ab0a202SJeff Mahoney return btrfs_show_u64(&block_rsv->size, &block_rsv->lock, buf); 5856ab0a202SJeff Mahoney } 586a969f4ccSHans van Kranenburg BTRFS_ATTR(allocation, global_rsv_size, global_rsv_size_show); 5876ab0a202SJeff Mahoney 5886ab0a202SJeff Mahoney static ssize_t global_rsv_reserved_show(struct kobject *kobj, 5896ab0a202SJeff Mahoney struct kobj_attribute *a, char *buf) 5906ab0a202SJeff Mahoney { 5916ab0a202SJeff Mahoney struct btrfs_fs_info *fs_info = to_fs_info(kobj->parent); 5926ab0a202SJeff Mahoney struct btrfs_block_rsv *block_rsv = &fs_info->global_block_rsv; 5936ab0a202SJeff Mahoney return btrfs_show_u64(&block_rsv->reserved, &block_rsv->lock, buf); 5946ab0a202SJeff Mahoney } 595a969f4ccSHans van Kranenburg BTRFS_ATTR(allocation, global_rsv_reserved, global_rsv_reserved_show); 5966ab0a202SJeff Mahoney 5976ab0a202SJeff Mahoney #define to_space_info(_kobj) container_of(_kobj, struct btrfs_space_info, kobj) 598c1895442SJeff Mahoney #define to_raid_kobj(_kobj) container_of(_kobj, struct raid_kobject, kobj) 5996ab0a202SJeff Mahoney 6006ab0a202SJeff Mahoney static ssize_t raid_bytes_show(struct kobject *kobj, 6016ab0a202SJeff Mahoney struct kobj_attribute *attr, char *buf); 602a969f4ccSHans van Kranenburg BTRFS_ATTR(raid, total_bytes, raid_bytes_show); 603a969f4ccSHans van Kranenburg BTRFS_ATTR(raid, used_bytes, raid_bytes_show); 6046ab0a202SJeff Mahoney 6056ab0a202SJeff Mahoney static ssize_t raid_bytes_show(struct kobject *kobj, 6066ab0a202SJeff Mahoney struct kobj_attribute *attr, char *buf) 6076ab0a202SJeff Mahoney 6086ab0a202SJeff Mahoney { 6096ab0a202SJeff Mahoney struct btrfs_space_info *sinfo = to_space_info(kobj->parent); 61032da5386SDavid Sterba struct btrfs_block_group *block_group; 61175cb379dSJeff Mahoney int index = btrfs_bg_flags_to_raid_index(to_raid_kobj(kobj)->flags); 6126ab0a202SJeff Mahoney u64 val = 0; 6136ab0a202SJeff Mahoney 6146ab0a202SJeff Mahoney down_read(&sinfo->groups_sem); 6156ab0a202SJeff Mahoney list_for_each_entry(block_group, &sinfo->block_groups[index], list) { 616a969f4ccSHans van Kranenburg if (&attr->attr == BTRFS_ATTR_PTR(raid, total_bytes)) 617b3470b5dSDavid Sterba val += block_group->length; 6186ab0a202SJeff Mahoney else 619bf38be65SDavid Sterba val += block_group->used; 6206ab0a202SJeff Mahoney } 6216ab0a202SJeff Mahoney up_read(&sinfo->groups_sem); 622abdd9febSTakashi Iwai return scnprintf(buf, PAGE_SIZE, "%llu\n", val); 6236ab0a202SJeff Mahoney } 6246ab0a202SJeff Mahoney 6257c7e3014SKimberly Brown static struct attribute *raid_attrs[] = { 626a969f4ccSHans van Kranenburg BTRFS_ATTR_PTR(raid, total_bytes), 627a969f4ccSHans van Kranenburg BTRFS_ATTR_PTR(raid, used_bytes), 6286ab0a202SJeff Mahoney NULL 6296ab0a202SJeff Mahoney }; 6307c7e3014SKimberly Brown ATTRIBUTE_GROUPS(raid); 6316ab0a202SJeff Mahoney 6326ab0a202SJeff Mahoney static void release_raid_kobj(struct kobject *kobj) 6336ab0a202SJeff Mahoney { 634c1895442SJeff Mahoney kfree(to_raid_kobj(kobj)); 6356ab0a202SJeff Mahoney } 6366ab0a202SJeff Mahoney 637536ea45cSDavid Sterba static struct kobj_type btrfs_raid_ktype = { 6386ab0a202SJeff Mahoney .sysfs_ops = &kobj_sysfs_ops, 6396ab0a202SJeff Mahoney .release = release_raid_kobj, 6407c7e3014SKimberly Brown .default_groups = raid_groups, 6416ab0a202SJeff Mahoney }; 6426ab0a202SJeff Mahoney 6436ab0a202SJeff Mahoney #define SPACE_INFO_ATTR(field) \ 6446ab0a202SJeff Mahoney static ssize_t btrfs_space_info_show_##field(struct kobject *kobj, \ 6456ab0a202SJeff Mahoney struct kobj_attribute *a, \ 6466ab0a202SJeff Mahoney char *buf) \ 6476ab0a202SJeff Mahoney { \ 6486ab0a202SJeff Mahoney struct btrfs_space_info *sinfo = to_space_info(kobj); \ 6496ab0a202SJeff Mahoney return btrfs_show_u64(&sinfo->field, &sinfo->lock, buf); \ 6506ab0a202SJeff Mahoney } \ 651a969f4ccSHans van Kranenburg BTRFS_ATTR(space_info, field, btrfs_space_info_show_##field) 6526ab0a202SJeff Mahoney 6536ab0a202SJeff Mahoney static ssize_t btrfs_space_info_show_total_bytes_pinned(struct kobject *kobj, 6546ab0a202SJeff Mahoney struct kobj_attribute *a, 6556ab0a202SJeff Mahoney char *buf) 6566ab0a202SJeff Mahoney { 6576ab0a202SJeff Mahoney struct btrfs_space_info *sinfo = to_space_info(kobj); 6586ab0a202SJeff Mahoney s64 val = percpu_counter_sum(&sinfo->total_bytes_pinned); 659abdd9febSTakashi Iwai return scnprintf(buf, PAGE_SIZE, "%lld\n", val); 6606ab0a202SJeff Mahoney } 6616ab0a202SJeff Mahoney 6626ab0a202SJeff Mahoney SPACE_INFO_ATTR(flags); 6636ab0a202SJeff Mahoney SPACE_INFO_ATTR(total_bytes); 6646ab0a202SJeff Mahoney SPACE_INFO_ATTR(bytes_used); 6656ab0a202SJeff Mahoney SPACE_INFO_ATTR(bytes_pinned); 6666ab0a202SJeff Mahoney SPACE_INFO_ATTR(bytes_reserved); 6676ab0a202SJeff Mahoney SPACE_INFO_ATTR(bytes_may_use); 668c1fd5c30SWang Xiaoguang SPACE_INFO_ATTR(bytes_readonly); 6696ab0a202SJeff Mahoney SPACE_INFO_ATTR(disk_used); 6706ab0a202SJeff Mahoney SPACE_INFO_ATTR(disk_total); 671a969f4ccSHans van Kranenburg BTRFS_ATTR(space_info, total_bytes_pinned, 672a969f4ccSHans van Kranenburg btrfs_space_info_show_total_bytes_pinned); 6736ab0a202SJeff Mahoney 6746ab0a202SJeff Mahoney static struct attribute *space_info_attrs[] = { 675a969f4ccSHans van Kranenburg BTRFS_ATTR_PTR(space_info, flags), 676a969f4ccSHans van Kranenburg BTRFS_ATTR_PTR(space_info, total_bytes), 677a969f4ccSHans van Kranenburg BTRFS_ATTR_PTR(space_info, bytes_used), 678a969f4ccSHans van Kranenburg BTRFS_ATTR_PTR(space_info, bytes_pinned), 679a969f4ccSHans van Kranenburg BTRFS_ATTR_PTR(space_info, bytes_reserved), 680a969f4ccSHans van Kranenburg BTRFS_ATTR_PTR(space_info, bytes_may_use), 681a969f4ccSHans van Kranenburg BTRFS_ATTR_PTR(space_info, bytes_readonly), 682a969f4ccSHans van Kranenburg BTRFS_ATTR_PTR(space_info, disk_used), 683a969f4ccSHans van Kranenburg BTRFS_ATTR_PTR(space_info, disk_total), 684a969f4ccSHans van Kranenburg BTRFS_ATTR_PTR(space_info, total_bytes_pinned), 6856ab0a202SJeff Mahoney NULL, 6866ab0a202SJeff Mahoney }; 6877c7e3014SKimberly Brown ATTRIBUTE_GROUPS(space_info); 6886ab0a202SJeff Mahoney 6896ab0a202SJeff Mahoney static void space_info_release(struct kobject *kobj) 6906ab0a202SJeff Mahoney { 6916ab0a202SJeff Mahoney struct btrfs_space_info *sinfo = to_space_info(kobj); 6926ab0a202SJeff Mahoney percpu_counter_destroy(&sinfo->total_bytes_pinned); 6936ab0a202SJeff Mahoney kfree(sinfo); 6946ab0a202SJeff Mahoney } 6956ab0a202SJeff Mahoney 69627992d01SDavid Sterba static struct kobj_type space_info_ktype = { 6976ab0a202SJeff Mahoney .sysfs_ops = &kobj_sysfs_ops, 6986ab0a202SJeff Mahoney .release = space_info_release, 6997c7e3014SKimberly Brown .default_groups = space_info_groups, 7006ab0a202SJeff Mahoney }; 7016ab0a202SJeff Mahoney 7026ab0a202SJeff Mahoney static const struct attribute *allocation_attrs[] = { 703a969f4ccSHans van Kranenburg BTRFS_ATTR_PTR(allocation, global_rsv_reserved), 704a969f4ccSHans van Kranenburg BTRFS_ATTR_PTR(allocation, global_rsv_size), 7056ab0a202SJeff Mahoney NULL, 7066ab0a202SJeff Mahoney }; 7076ab0a202SJeff Mahoney 708f8ba9c11SJeff Mahoney static ssize_t btrfs_label_show(struct kobject *kobj, 709f8ba9c11SJeff Mahoney struct kobj_attribute *a, char *buf) 710f8ba9c11SJeff Mahoney { 711f8ba9c11SJeff Mahoney struct btrfs_fs_info *fs_info = to_fs_info(kobj); 71248fcc3ffSSatoru Takeuchi char *label = fs_info->super_copy->label; 713ee17fc80SDavid Sterba ssize_t ret; 714ee17fc80SDavid Sterba 715ee17fc80SDavid Sterba spin_lock(&fs_info->super_lock); 716abdd9febSTakashi Iwai ret = scnprintf(buf, PAGE_SIZE, label[0] ? "%s\n" : "%s", label); 717ee17fc80SDavid Sterba spin_unlock(&fs_info->super_lock); 718ee17fc80SDavid Sterba 719ee17fc80SDavid Sterba return ret; 720f8ba9c11SJeff Mahoney } 721f8ba9c11SJeff Mahoney 722f8ba9c11SJeff Mahoney static ssize_t btrfs_label_store(struct kobject *kobj, 723f8ba9c11SJeff Mahoney struct kobj_attribute *a, 724f8ba9c11SJeff Mahoney const char *buf, size_t len) 725f8ba9c11SJeff Mahoney { 726f8ba9c11SJeff Mahoney struct btrfs_fs_info *fs_info = to_fs_info(kobj); 72748fcc3ffSSatoru Takeuchi size_t p_len; 728f8ba9c11SJeff Mahoney 72966ac9fe7SDavid Sterba if (!fs_info) 73066ac9fe7SDavid Sterba return -EPERM; 73166ac9fe7SDavid Sterba 732bc98a42cSDavid Howells if (sb_rdonly(fs_info->sb)) 73379aec2b8SAnand Jain return -EROFS; 73479aec2b8SAnand Jain 73548fcc3ffSSatoru Takeuchi /* 73648fcc3ffSSatoru Takeuchi * p_len is the len until the first occurrence of either 73748fcc3ffSSatoru Takeuchi * '\n' or '\0' 73848fcc3ffSSatoru Takeuchi */ 73948fcc3ffSSatoru Takeuchi p_len = strcspn(buf, "\n"); 74048fcc3ffSSatoru Takeuchi 74148fcc3ffSSatoru Takeuchi if (p_len >= BTRFS_LABEL_SIZE) 742f8ba9c11SJeff Mahoney return -EINVAL; 743f8ba9c11SJeff Mahoney 744a6f69dc8SDavid Sterba spin_lock(&fs_info->super_lock); 74548fcc3ffSSatoru Takeuchi memset(fs_info->super_copy->label, 0, BTRFS_LABEL_SIZE); 74648fcc3ffSSatoru Takeuchi memcpy(fs_info->super_copy->label, buf, p_len); 747a6f69dc8SDavid Sterba spin_unlock(&fs_info->super_lock); 748f8ba9c11SJeff Mahoney 749a6f69dc8SDavid Sterba /* 750a6f69dc8SDavid Sterba * We don't want to do full transaction commit from inside sysfs 751a6f69dc8SDavid Sterba */ 752a6f69dc8SDavid Sterba btrfs_set_pending(fs_info, COMMIT); 753a6f69dc8SDavid Sterba wake_up_process(fs_info->transaction_kthread); 754a6f69dc8SDavid Sterba 755f8ba9c11SJeff Mahoney return len; 756f8ba9c11SJeff Mahoney } 757a969f4ccSHans van Kranenburg BTRFS_ATTR_RW(, label, btrfs_label_show, btrfs_label_store); 758f8ba9c11SJeff Mahoney 759df93589aSDavid Sterba static ssize_t btrfs_nodesize_show(struct kobject *kobj, 760df93589aSDavid Sterba struct kobj_attribute *a, char *buf) 761df93589aSDavid Sterba { 762df93589aSDavid Sterba struct btrfs_fs_info *fs_info = to_fs_info(kobj); 763df93589aSDavid Sterba 764abdd9febSTakashi Iwai return scnprintf(buf, PAGE_SIZE, "%u\n", fs_info->super_copy->nodesize); 765df93589aSDavid Sterba } 766df93589aSDavid Sterba 767a969f4ccSHans van Kranenburg BTRFS_ATTR(, nodesize, btrfs_nodesize_show); 768df93589aSDavid Sterba 769df93589aSDavid Sterba static ssize_t btrfs_sectorsize_show(struct kobject *kobj, 770df93589aSDavid Sterba struct kobj_attribute *a, char *buf) 771df93589aSDavid Sterba { 772df93589aSDavid Sterba struct btrfs_fs_info *fs_info = to_fs_info(kobj); 773df93589aSDavid Sterba 774abdd9febSTakashi Iwai return scnprintf(buf, PAGE_SIZE, "%u\n", 775093e037cSDavid Sterba fs_info->super_copy->sectorsize); 776df93589aSDavid Sterba } 777df93589aSDavid Sterba 778a969f4ccSHans van Kranenburg BTRFS_ATTR(, sectorsize, btrfs_sectorsize_show); 779df93589aSDavid Sterba 780df93589aSDavid Sterba static ssize_t btrfs_clone_alignment_show(struct kobject *kobj, 781df93589aSDavid Sterba struct kobj_attribute *a, char *buf) 782df93589aSDavid Sterba { 783df93589aSDavid Sterba struct btrfs_fs_info *fs_info = to_fs_info(kobj); 784df93589aSDavid Sterba 785abdd9febSTakashi Iwai return scnprintf(buf, PAGE_SIZE, "%u\n", fs_info->super_copy->sectorsize); 786df93589aSDavid Sterba } 787df93589aSDavid Sterba 788a969f4ccSHans van Kranenburg BTRFS_ATTR(, clone_alignment, btrfs_clone_alignment_show); 789df93589aSDavid Sterba 7902723480aSSargun Dhillon static ssize_t quota_override_show(struct kobject *kobj, 7912723480aSSargun Dhillon struct kobj_attribute *a, char *buf) 7922723480aSSargun Dhillon { 7932723480aSSargun Dhillon struct btrfs_fs_info *fs_info = to_fs_info(kobj); 7942723480aSSargun Dhillon int quota_override; 7952723480aSSargun Dhillon 7962723480aSSargun Dhillon quota_override = test_bit(BTRFS_FS_QUOTA_OVERRIDE, &fs_info->flags); 797abdd9febSTakashi Iwai return scnprintf(buf, PAGE_SIZE, "%d\n", quota_override); 7982723480aSSargun Dhillon } 7992723480aSSargun Dhillon 8002723480aSSargun Dhillon static ssize_t quota_override_store(struct kobject *kobj, 8012723480aSSargun Dhillon struct kobj_attribute *a, 8022723480aSSargun Dhillon const char *buf, size_t len) 8032723480aSSargun Dhillon { 8042723480aSSargun Dhillon struct btrfs_fs_info *fs_info = to_fs_info(kobj); 8052723480aSSargun Dhillon unsigned long knob; 8062723480aSSargun Dhillon int err; 8072723480aSSargun Dhillon 8082723480aSSargun Dhillon if (!fs_info) 8092723480aSSargun Dhillon return -EPERM; 8102723480aSSargun Dhillon 8112723480aSSargun Dhillon if (!capable(CAP_SYS_RESOURCE)) 8122723480aSSargun Dhillon return -EPERM; 8132723480aSSargun Dhillon 8142723480aSSargun Dhillon err = kstrtoul(buf, 10, &knob); 8152723480aSSargun Dhillon if (err) 8162723480aSSargun Dhillon return err; 8172723480aSSargun Dhillon if (knob > 1) 8182723480aSSargun Dhillon return -EINVAL; 8192723480aSSargun Dhillon 8202723480aSSargun Dhillon if (knob) 8212723480aSSargun Dhillon set_bit(BTRFS_FS_QUOTA_OVERRIDE, &fs_info->flags); 8222723480aSSargun Dhillon else 8232723480aSSargun Dhillon clear_bit(BTRFS_FS_QUOTA_OVERRIDE, &fs_info->flags); 8242723480aSSargun Dhillon 8252723480aSSargun Dhillon return len; 8262723480aSSargun Dhillon } 8272723480aSSargun Dhillon 828a969f4ccSHans van Kranenburg BTRFS_ATTR_RW(, quota_override, quota_override_show, quota_override_store); 8292723480aSSargun Dhillon 83056f20f40SNikolay Borisov static ssize_t btrfs_metadata_uuid_show(struct kobject *kobj, 83156f20f40SNikolay Borisov struct kobj_attribute *a, char *buf) 83256f20f40SNikolay Borisov { 83356f20f40SNikolay Borisov struct btrfs_fs_info *fs_info = to_fs_info(kobj); 83456f20f40SNikolay Borisov 835abdd9febSTakashi Iwai return scnprintf(buf, PAGE_SIZE, "%pU\n", 83656f20f40SNikolay Borisov fs_info->fs_devices->metadata_uuid); 83756f20f40SNikolay Borisov } 83856f20f40SNikolay Borisov 83956f20f40SNikolay Borisov BTRFS_ATTR(, metadata_uuid, btrfs_metadata_uuid_show); 84056f20f40SNikolay Borisov 84141e6d2a8SJohannes Thumshirn static ssize_t btrfs_checksum_show(struct kobject *kobj, 84241e6d2a8SJohannes Thumshirn struct kobj_attribute *a, char *buf) 84341e6d2a8SJohannes Thumshirn { 84441e6d2a8SJohannes Thumshirn struct btrfs_fs_info *fs_info = to_fs_info(kobj); 84541e6d2a8SJohannes Thumshirn u16 csum_type = btrfs_super_csum_type(fs_info->super_copy); 84641e6d2a8SJohannes Thumshirn 847abdd9febSTakashi Iwai return scnprintf(buf, PAGE_SIZE, "%s (%s)\n", 84841e6d2a8SJohannes Thumshirn btrfs_super_csum_name(csum_type), 84941e6d2a8SJohannes Thumshirn crypto_shash_driver_name(fs_info->csum_shash)); 85041e6d2a8SJohannes Thumshirn } 85141e6d2a8SJohannes Thumshirn 85241e6d2a8SJohannes Thumshirn BTRFS_ATTR(, checksum, btrfs_checksum_show); 85341e6d2a8SJohannes Thumshirn 85466a2823cSGoldwyn Rodrigues static ssize_t btrfs_exclusive_operation_show(struct kobject *kobj, 85566a2823cSGoldwyn Rodrigues struct kobj_attribute *a, char *buf) 85666a2823cSGoldwyn Rodrigues { 85766a2823cSGoldwyn Rodrigues struct btrfs_fs_info *fs_info = to_fs_info(kobj); 85866a2823cSGoldwyn Rodrigues const char *str; 85966a2823cSGoldwyn Rodrigues 86066a2823cSGoldwyn Rodrigues switch (READ_ONCE(fs_info->exclusive_operation)) { 86166a2823cSGoldwyn Rodrigues case BTRFS_EXCLOP_NONE: 86266a2823cSGoldwyn Rodrigues str = "none\n"; 86366a2823cSGoldwyn Rodrigues break; 86466a2823cSGoldwyn Rodrigues case BTRFS_EXCLOP_BALANCE: 86566a2823cSGoldwyn Rodrigues str = "balance\n"; 86666a2823cSGoldwyn Rodrigues break; 86766a2823cSGoldwyn Rodrigues case BTRFS_EXCLOP_DEV_ADD: 86866a2823cSGoldwyn Rodrigues str = "device add\n"; 86966a2823cSGoldwyn Rodrigues break; 87066a2823cSGoldwyn Rodrigues case BTRFS_EXCLOP_DEV_REMOVE: 87166a2823cSGoldwyn Rodrigues str = "device remove\n"; 87266a2823cSGoldwyn Rodrigues break; 87366a2823cSGoldwyn Rodrigues case BTRFS_EXCLOP_DEV_REPLACE: 87466a2823cSGoldwyn Rodrigues str = "device replace\n"; 87566a2823cSGoldwyn Rodrigues break; 87666a2823cSGoldwyn Rodrigues case BTRFS_EXCLOP_RESIZE: 87766a2823cSGoldwyn Rodrigues str = "resize\n"; 87866a2823cSGoldwyn Rodrigues break; 87966a2823cSGoldwyn Rodrigues case BTRFS_EXCLOP_SWAP_ACTIVATE: 88066a2823cSGoldwyn Rodrigues str = "swap activate\n"; 88166a2823cSGoldwyn Rodrigues break; 88266a2823cSGoldwyn Rodrigues default: 88366a2823cSGoldwyn Rodrigues str = "UNKNOWN\n"; 88466a2823cSGoldwyn Rodrigues break; 88566a2823cSGoldwyn Rodrigues } 88666a2823cSGoldwyn Rodrigues return scnprintf(buf, PAGE_SIZE, "%s", str); 88766a2823cSGoldwyn Rodrigues } 88866a2823cSGoldwyn Rodrigues BTRFS_ATTR(, exclusive_operation, btrfs_exclusive_operation_show); 88966a2823cSGoldwyn Rodrigues 890089c8b05SAnand Jain static ssize_t btrfs_generation_show(struct kobject *kobj, 891089c8b05SAnand Jain struct kobj_attribute *a, char *buf) 892089c8b05SAnand Jain { 893089c8b05SAnand Jain struct btrfs_fs_info *fs_info = to_fs_info(kobj); 894089c8b05SAnand Jain 895089c8b05SAnand Jain return scnprintf(buf, PAGE_SIZE, "%llu\n", fs_info->generation); 896089c8b05SAnand Jain } 897089c8b05SAnand Jain BTRFS_ATTR(, generation, btrfs_generation_show); 898089c8b05SAnand Jain 899aaefed20SAnand Jain /* 900aaefed20SAnand Jain * Look for an exact string @string in @buffer with possible leading or 901aaefed20SAnand Jain * trailing whitespace 902aaefed20SAnand Jain */ 903aaefed20SAnand Jain static bool strmatch(const char *buffer, const char *string) 904aaefed20SAnand Jain { 905aaefed20SAnand Jain const size_t len = strlen(string); 906aaefed20SAnand Jain 907aaefed20SAnand Jain /* Skip leading whitespace */ 908aaefed20SAnand Jain buffer = skip_spaces(buffer); 909aaefed20SAnand Jain 910aaefed20SAnand Jain /* Match entire string, check if the rest is whitespace or empty */ 911aaefed20SAnand Jain if (strncmp(string, buffer, len) == 0 && 912aaefed20SAnand Jain strlen(skip_spaces(buffer + len)) == 0) 913aaefed20SAnand Jain return true; 914aaefed20SAnand Jain 915aaefed20SAnand Jain return false; 916aaefed20SAnand Jain } 917aaefed20SAnand Jain 9183d8cc17aSAnand Jain static const char * const btrfs_read_policy_name[] = { "pid" }; 9193d8cc17aSAnand Jain 9203d8cc17aSAnand Jain static ssize_t btrfs_read_policy_show(struct kobject *kobj, 9213d8cc17aSAnand Jain struct kobj_attribute *a, char *buf) 9223d8cc17aSAnand Jain { 9233d8cc17aSAnand Jain struct btrfs_fs_devices *fs_devices = to_fs_devs(kobj); 9243d8cc17aSAnand Jain ssize_t ret = 0; 9253d8cc17aSAnand Jain int i; 9263d8cc17aSAnand Jain 9273d8cc17aSAnand Jain for (i = 0; i < BTRFS_NR_READ_POLICY; i++) { 9283d8cc17aSAnand Jain if (fs_devices->read_policy == i) 9293d8cc17aSAnand Jain ret += scnprintf(buf + ret, PAGE_SIZE - ret, "%s[%s]", 9303d8cc17aSAnand Jain (ret == 0 ? "" : " "), 9313d8cc17aSAnand Jain btrfs_read_policy_name[i]); 9323d8cc17aSAnand Jain else 9333d8cc17aSAnand Jain ret += scnprintf(buf + ret, PAGE_SIZE - ret, "%s%s", 9343d8cc17aSAnand Jain (ret == 0 ? "" : " "), 9353d8cc17aSAnand Jain btrfs_read_policy_name[i]); 9363d8cc17aSAnand Jain } 9373d8cc17aSAnand Jain 9383d8cc17aSAnand Jain ret += scnprintf(buf + ret, PAGE_SIZE - ret, "\n"); 9393d8cc17aSAnand Jain 9403d8cc17aSAnand Jain return ret; 9413d8cc17aSAnand Jain } 9423d8cc17aSAnand Jain 9433d8cc17aSAnand Jain static ssize_t btrfs_read_policy_store(struct kobject *kobj, 9443d8cc17aSAnand Jain struct kobj_attribute *a, 9453d8cc17aSAnand Jain const char *buf, size_t len) 9463d8cc17aSAnand Jain { 9473d8cc17aSAnand Jain struct btrfs_fs_devices *fs_devices = to_fs_devs(kobj); 9483d8cc17aSAnand Jain int i; 9493d8cc17aSAnand Jain 9503d8cc17aSAnand Jain for (i = 0; i < BTRFS_NR_READ_POLICY; i++) { 9513d8cc17aSAnand Jain if (strmatch(buf, btrfs_read_policy_name[i])) { 9523d8cc17aSAnand Jain if (i != fs_devices->read_policy) { 9533d8cc17aSAnand Jain fs_devices->read_policy = i; 9543d8cc17aSAnand Jain btrfs_info(fs_devices->fs_info, 9553d8cc17aSAnand Jain "read policy set to '%s'", 9563d8cc17aSAnand Jain btrfs_read_policy_name[i]); 9573d8cc17aSAnand Jain } 9583d8cc17aSAnand Jain return len; 9593d8cc17aSAnand Jain } 9603d8cc17aSAnand Jain } 9613d8cc17aSAnand Jain 9623d8cc17aSAnand Jain return -EINVAL; 9633d8cc17aSAnand Jain } 9643d8cc17aSAnand Jain BTRFS_ATTR_RW(, read_policy, btrfs_read_policy_show, btrfs_read_policy_store); 9653d8cc17aSAnand Jain 9660dd2906fSAnand Jain static const struct attribute *btrfs_attrs[] = { 967a969f4ccSHans van Kranenburg BTRFS_ATTR_PTR(, label), 968a969f4ccSHans van Kranenburg BTRFS_ATTR_PTR(, nodesize), 969a969f4ccSHans van Kranenburg BTRFS_ATTR_PTR(, sectorsize), 970a969f4ccSHans van Kranenburg BTRFS_ATTR_PTR(, clone_alignment), 971a969f4ccSHans van Kranenburg BTRFS_ATTR_PTR(, quota_override), 97256f20f40SNikolay Borisov BTRFS_ATTR_PTR(, metadata_uuid), 97341e6d2a8SJohannes Thumshirn BTRFS_ATTR_PTR(, checksum), 97466a2823cSGoldwyn Rodrigues BTRFS_ATTR_PTR(, exclusive_operation), 975089c8b05SAnand Jain BTRFS_ATTR_PTR(, generation), 9763d8cc17aSAnand Jain BTRFS_ATTR_PTR(, read_policy), 977f8ba9c11SJeff Mahoney NULL, 978f8ba9c11SJeff Mahoney }; 979f8ba9c11SJeff Mahoney 980c1b7e474SAnand Jain static void btrfs_release_fsid_kobj(struct kobject *kobj) 981510d7360SJeff Mahoney { 9822e7910d6SAnand Jain struct btrfs_fs_devices *fs_devs = to_fs_devs(kobj); 983248d200dSAnand Jain 984c1b7e474SAnand Jain memset(&fs_devs->fsid_kobj, 0, sizeof(struct kobject)); 9852e7910d6SAnand Jain complete(&fs_devs->kobj_unregister); 986510d7360SJeff Mahoney } 987510d7360SJeff Mahoney 988510d7360SJeff Mahoney static struct kobj_type btrfs_ktype = { 989510d7360SJeff Mahoney .sysfs_ops = &kobj_sysfs_ops, 990c1b7e474SAnand Jain .release = btrfs_release_fsid_kobj, 991510d7360SJeff Mahoney }; 992510d7360SJeff Mahoney 9932e7910d6SAnand Jain static inline struct btrfs_fs_devices *to_fs_devs(struct kobject *kobj) 9942e7910d6SAnand Jain { 9952e7910d6SAnand Jain if (kobj->ktype != &btrfs_ktype) 9962e7910d6SAnand Jain return NULL; 997c1b7e474SAnand Jain return container_of(kobj, struct btrfs_fs_devices, fsid_kobj); 9982e7910d6SAnand Jain } 9992e7910d6SAnand Jain 1000510d7360SJeff Mahoney static inline struct btrfs_fs_info *to_fs_info(struct kobject *kobj) 1001510d7360SJeff Mahoney { 1002510d7360SJeff Mahoney if (kobj->ktype != &btrfs_ktype) 1003510d7360SJeff Mahoney return NULL; 10042e7910d6SAnand Jain return to_fs_devs(kobj)->fs_info; 1005510d7360SJeff Mahoney } 100658176a96SJosef Bacik 1007e453d989SJeff Mahoney #define NUM_FEATURE_BITS 64 10086c52157fSTomohiro Misono #define BTRFS_FEATURE_NAME_MAX 13 10096c52157fSTomohiro Misono static char btrfs_unknown_feature_names[FEAT_MAX][NUM_FEATURE_BITS][BTRFS_FEATURE_NAME_MAX]; 10106c52157fSTomohiro Misono static struct btrfs_feature_attr btrfs_feature_attrs[FEAT_MAX][NUM_FEATURE_BITS]; 1011e453d989SJeff Mahoney 10126c52157fSTomohiro Misono static const u64 supported_feature_masks[FEAT_MAX] = { 1013e453d989SJeff Mahoney [FEAT_COMPAT] = BTRFS_FEATURE_COMPAT_SUPP, 1014e453d989SJeff Mahoney [FEAT_COMPAT_RO] = BTRFS_FEATURE_COMPAT_RO_SUPP, 1015e453d989SJeff Mahoney [FEAT_INCOMPAT] = BTRFS_FEATURE_INCOMPAT_SUPP, 1016e453d989SJeff Mahoney }; 1017e453d989SJeff Mahoney 1018e453d989SJeff Mahoney static int addrm_unknown_feature_attrs(struct btrfs_fs_info *fs_info, bool add) 10195ac1d209SJeff Mahoney { 1020e453d989SJeff Mahoney int set; 1021e453d989SJeff Mahoney 1022e453d989SJeff Mahoney for (set = 0; set < FEAT_MAX; set++) { 1023e453d989SJeff Mahoney int i; 1024e453d989SJeff Mahoney struct attribute *attrs[2]; 1025e453d989SJeff Mahoney struct attribute_group agroup = { 1026e453d989SJeff Mahoney .name = "features", 1027e453d989SJeff Mahoney .attrs = attrs, 1028e453d989SJeff Mahoney }; 1029e453d989SJeff Mahoney u64 features = get_features(fs_info, set); 1030e453d989SJeff Mahoney features &= ~supported_feature_masks[set]; 1031e453d989SJeff Mahoney 1032e453d989SJeff Mahoney if (!features) 1033e453d989SJeff Mahoney continue; 1034e453d989SJeff Mahoney 1035e453d989SJeff Mahoney attrs[1] = NULL; 1036e453d989SJeff Mahoney for (i = 0; i < NUM_FEATURE_BITS; i++) { 1037e453d989SJeff Mahoney struct btrfs_feature_attr *fa; 1038e453d989SJeff Mahoney 1039e453d989SJeff Mahoney if (!(features & (1ULL << i))) 1040e453d989SJeff Mahoney continue; 1041e453d989SJeff Mahoney 1042e453d989SJeff Mahoney fa = &btrfs_feature_attrs[set][i]; 1043e453d989SJeff Mahoney attrs[0] = &fa->kobj_attr.attr; 1044e453d989SJeff Mahoney if (add) { 1045e453d989SJeff Mahoney int ret; 1046c1b7e474SAnand Jain ret = sysfs_merge_group(&fs_info->fs_devices->fsid_kobj, 1047e453d989SJeff Mahoney &agroup); 1048e453d989SJeff Mahoney if (ret) 1049e453d989SJeff Mahoney return ret; 1050e453d989SJeff Mahoney } else 1051c1b7e474SAnand Jain sysfs_unmerge_group(&fs_info->fs_devices->fsid_kobj, 1052e453d989SJeff Mahoney &agroup); 1053e453d989SJeff Mahoney } 1054e453d989SJeff Mahoney 1055e453d989SJeff Mahoney } 1056e453d989SJeff Mahoney return 0; 1057e453d989SJeff Mahoney } 1058e453d989SJeff Mahoney 10592e3e1281SAnand Jain static void __btrfs_sysfs_remove_fsid(struct btrfs_fs_devices *fs_devs) 1060e453d989SJeff Mahoney { 1061a013d141SAnand Jain if (fs_devs->devinfo_kobj) { 1062a013d141SAnand Jain kobject_del(fs_devs->devinfo_kobj); 1063a013d141SAnand Jain kobject_put(fs_devs->devinfo_kobj); 1064a013d141SAnand Jain fs_devs->devinfo_kobj = NULL; 1065a013d141SAnand Jain } 1066a013d141SAnand Jain 1067b5501504SAnand Jain if (fs_devs->devices_kobj) { 1068b5501504SAnand Jain kobject_del(fs_devs->devices_kobj); 1069b5501504SAnand Jain kobject_put(fs_devs->devices_kobj); 1070b5501504SAnand Jain fs_devs->devices_kobj = NULL; 1071aaf13305SAnand Jain } 1072aaf13305SAnand Jain 1073c1b7e474SAnand Jain if (fs_devs->fsid_kobj.state_initialized) { 1074c1b7e474SAnand Jain kobject_del(&fs_devs->fsid_kobj); 1075c1b7e474SAnand Jain kobject_put(&fs_devs->fsid_kobj); 10762e7910d6SAnand Jain wait_for_completion(&fs_devs->kobj_unregister); 10775ac1d209SJeff Mahoney } 1078f90fc547SAnand Jain } 10795ac1d209SJeff Mahoney 10802e3e1281SAnand Jain /* when fs_devs is NULL it will remove all fsid kobject */ 10811d1c1be3SAnand Jain void btrfs_sysfs_remove_fsid(struct btrfs_fs_devices *fs_devs) 10822e3e1281SAnand Jain { 10832e3e1281SAnand Jain struct list_head *fs_uuids = btrfs_get_fs_uuids(); 10842e3e1281SAnand Jain 10852e3e1281SAnand Jain if (fs_devs) { 10862e3e1281SAnand Jain __btrfs_sysfs_remove_fsid(fs_devs); 10872e3e1281SAnand Jain return; 10882e3e1281SAnand Jain } 10892e3e1281SAnand Jain 1090c4babc5eSAnand Jain list_for_each_entry(fs_devs, fs_uuids, fs_list) { 10912e3e1281SAnand Jain __btrfs_sysfs_remove_fsid(fs_devs); 10922e3e1281SAnand Jain } 10932e3e1281SAnand Jain } 10942e3e1281SAnand Jain 109553f8a74cSAnand Jain static void btrfs_sysfs_remove_fs_devices(struct btrfs_fs_devices *fs_devices) 109653f8a74cSAnand Jain { 109753f8a74cSAnand Jain struct btrfs_device *device; 109830b0e4e0SAnand Jain struct btrfs_fs_devices *seed; 109953f8a74cSAnand Jain 110053f8a74cSAnand Jain list_for_each_entry(device, &fs_devices->devices, dev_list) 110153f8a74cSAnand Jain btrfs_sysfs_remove_device(device); 110230b0e4e0SAnand Jain 110330b0e4e0SAnand Jain list_for_each_entry(seed, &fs_devices->seed_list, seed_list) { 110430b0e4e0SAnand Jain list_for_each_entry(device, &seed->devices, dev_list) 110530b0e4e0SAnand Jain btrfs_sysfs_remove_device(device); 110630b0e4e0SAnand Jain } 110753f8a74cSAnand Jain } 110853f8a74cSAnand Jain 11096618a59bSAnand Jain void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info) 1110e453d989SJeff Mahoney { 11113092c68fSNikolay Borisov struct kobject *fsid_kobj = &fs_info->fs_devices->fsid_kobj; 11123092c68fSNikolay Borisov 11133092c68fSNikolay Borisov sysfs_remove_link(fsid_kobj, "bdi"); 11143092c68fSNikolay Borisov 1115e453d989SJeff Mahoney if (fs_info->space_info_kobj) { 1116e453d989SJeff Mahoney sysfs_remove_files(fs_info->space_info_kobj, allocation_attrs); 1117e453d989SJeff Mahoney kobject_del(fs_info->space_info_kobj); 1118e453d989SJeff Mahoney kobject_put(fs_info->space_info_kobj); 1119e453d989SJeff Mahoney } 112071e8978eSDennis Zhou #ifdef CONFIG_BTRFS_DEBUG 1121e4faab84SDennis Zhou if (fs_info->discard_debug_kobj) { 1122e4faab84SDennis Zhou sysfs_remove_files(fs_info->discard_debug_kobj, 1123e4faab84SDennis Zhou discard_debug_attrs); 1124e4faab84SDennis Zhou kobject_del(fs_info->discard_debug_kobj); 1125e4faab84SDennis Zhou kobject_put(fs_info->discard_debug_kobj); 1126e4faab84SDennis Zhou } 112793945cb4SDennis Zhou if (fs_info->debug_kobj) { 112893945cb4SDennis Zhou sysfs_remove_files(fs_info->debug_kobj, btrfs_debug_mount_attrs); 112993945cb4SDennis Zhou kobject_del(fs_info->debug_kobj); 113093945cb4SDennis Zhou kobject_put(fs_info->debug_kobj); 113193945cb4SDennis Zhou } 113271e8978eSDennis Zhou #endif 1133e453d989SJeff Mahoney addrm_unknown_feature_attrs(fs_info, false); 11343092c68fSNikolay Borisov sysfs_remove_group(fsid_kobj, &btrfs_feature_attr_group); 11353092c68fSNikolay Borisov sysfs_remove_files(fsid_kobj, btrfs_attrs); 113653f8a74cSAnand Jain btrfs_sysfs_remove_fs_devices(fs_info->fs_devices); 1137e453d989SJeff Mahoney } 1138e453d989SJeff Mahoney 1139f10152bcSDavid Sterba static const char * const btrfs_feature_set_names[FEAT_MAX] = { 114079da4fa4SJeff Mahoney [FEAT_COMPAT] = "compat", 114179da4fa4SJeff Mahoney [FEAT_COMPAT_RO] = "compat_ro", 114279da4fa4SJeff Mahoney [FEAT_INCOMPAT] = "incompat", 114379da4fa4SJeff Mahoney }; 114479da4fa4SJeff Mahoney 11459e6df7ceSDavid Sterba const char *btrfs_feature_set_name(enum btrfs_feature_set set) 1146f10152bcSDavid Sterba { 1147f10152bcSDavid Sterba return btrfs_feature_set_names[set]; 1148f10152bcSDavid Sterba } 1149f10152bcSDavid Sterba 11503b02a68aSJeff Mahoney char *btrfs_printable_features(enum btrfs_feature_set set, u64 flags) 11513b02a68aSJeff Mahoney { 11523b02a68aSJeff Mahoney size_t bufsize = 4096; /* safe max, 64 names * 64 bytes */ 11533b02a68aSJeff Mahoney int len = 0; 11543b02a68aSJeff Mahoney int i; 11553b02a68aSJeff Mahoney char *str; 11563b02a68aSJeff Mahoney 11573b02a68aSJeff Mahoney str = kmalloc(bufsize, GFP_KERNEL); 11583b02a68aSJeff Mahoney if (!str) 11593b02a68aSJeff Mahoney return str; 11603b02a68aSJeff Mahoney 11613b02a68aSJeff Mahoney for (i = 0; i < ARRAY_SIZE(btrfs_feature_attrs[set]); i++) { 11623b02a68aSJeff Mahoney const char *name; 11633b02a68aSJeff Mahoney 11643b02a68aSJeff Mahoney if (!(flags & (1ULL << i))) 11653b02a68aSJeff Mahoney continue; 11663b02a68aSJeff Mahoney 11673b02a68aSJeff Mahoney name = btrfs_feature_attrs[set][i].kobj_attr.attr.name; 1168abdd9febSTakashi Iwai len += scnprintf(str + len, bufsize - len, "%s%s", 11693b02a68aSJeff Mahoney len ? "," : "", name); 11703b02a68aSJeff Mahoney } 11713b02a68aSJeff Mahoney 11723b02a68aSJeff Mahoney return str; 11733b02a68aSJeff Mahoney } 11743b02a68aSJeff Mahoney 117579da4fa4SJeff Mahoney static void init_feature_attrs(void) 117679da4fa4SJeff Mahoney { 117779da4fa4SJeff Mahoney struct btrfs_feature_attr *fa; 117879da4fa4SJeff Mahoney int set, i; 117979da4fa4SJeff Mahoney 118079da4fa4SJeff Mahoney BUILD_BUG_ON(ARRAY_SIZE(btrfs_unknown_feature_names) != 118179da4fa4SJeff Mahoney ARRAY_SIZE(btrfs_feature_attrs)); 118279da4fa4SJeff Mahoney BUILD_BUG_ON(ARRAY_SIZE(btrfs_unknown_feature_names[0]) != 118379da4fa4SJeff Mahoney ARRAY_SIZE(btrfs_feature_attrs[0])); 118479da4fa4SJeff Mahoney 11853b02a68aSJeff Mahoney memset(btrfs_feature_attrs, 0, sizeof(btrfs_feature_attrs)); 11863b02a68aSJeff Mahoney memset(btrfs_unknown_feature_names, 0, 11873b02a68aSJeff Mahoney sizeof(btrfs_unknown_feature_names)); 11883b02a68aSJeff Mahoney 118979da4fa4SJeff Mahoney for (i = 0; btrfs_supported_feature_attrs[i]; i++) { 119079da4fa4SJeff Mahoney struct btrfs_feature_attr *sfa; 119179da4fa4SJeff Mahoney struct attribute *a = btrfs_supported_feature_attrs[i]; 11923b02a68aSJeff Mahoney int bit; 119379da4fa4SJeff Mahoney sfa = attr_to_btrfs_feature_attr(a); 11943b02a68aSJeff Mahoney bit = ilog2(sfa->feature_bit); 11953b02a68aSJeff Mahoney fa = &btrfs_feature_attrs[sfa->feature_set][bit]; 119679da4fa4SJeff Mahoney 119779da4fa4SJeff Mahoney fa->kobj_attr.attr.name = sfa->kobj_attr.attr.name; 119879da4fa4SJeff Mahoney } 119979da4fa4SJeff Mahoney 120079da4fa4SJeff Mahoney for (set = 0; set < FEAT_MAX; set++) { 120179da4fa4SJeff Mahoney for (i = 0; i < ARRAY_SIZE(btrfs_feature_attrs[set]); i++) { 120279da4fa4SJeff Mahoney char *name = btrfs_unknown_feature_names[set][i]; 120379da4fa4SJeff Mahoney fa = &btrfs_feature_attrs[set][i]; 120479da4fa4SJeff Mahoney 120579da4fa4SJeff Mahoney if (fa->kobj_attr.attr.name) 120679da4fa4SJeff Mahoney continue; 120779da4fa4SJeff Mahoney 12086c52157fSTomohiro Misono snprintf(name, BTRFS_FEATURE_NAME_MAX, "%s:%u", 120979da4fa4SJeff Mahoney btrfs_feature_set_names[set], i); 121079da4fa4SJeff Mahoney 121179da4fa4SJeff Mahoney fa->kobj_attr.attr.name = name; 121279da4fa4SJeff Mahoney fa->kobj_attr.attr.mode = S_IRUGO; 121379da4fa4SJeff Mahoney fa->feature_set = set; 121479da4fa4SJeff Mahoney fa->feature_bit = 1ULL << i; 121579da4fa4SJeff Mahoney } 121679da4fa4SJeff Mahoney } 121779da4fa4SJeff Mahoney } 121879da4fa4SJeff Mahoney 121932a9991fSDavid Sterba /* 122032a9991fSDavid Sterba * Create a sysfs entry for a given block group type at path 122132a9991fSDavid Sterba * /sys/fs/btrfs/UUID/allocation/data/TYPE 122232a9991fSDavid Sterba */ 122332da5386SDavid Sterba void btrfs_sysfs_add_block_group_type(struct btrfs_block_group *cache) 122432a9991fSDavid Sterba { 122532a9991fSDavid Sterba struct btrfs_fs_info *fs_info = cache->fs_info; 122632a9991fSDavid Sterba struct btrfs_space_info *space_info = cache->space_info; 122732a9991fSDavid Sterba struct raid_kobject *rkobj; 122832a9991fSDavid Sterba const int index = btrfs_bg_flags_to_raid_index(cache->flags); 122932a9991fSDavid Sterba unsigned int nofs_flag; 123032a9991fSDavid Sterba int ret; 123132a9991fSDavid Sterba 123232a9991fSDavid Sterba /* 123332a9991fSDavid Sterba * Setup a NOFS context because kobject_add(), deep in its call chain, 123432a9991fSDavid Sterba * does GFP_KERNEL allocations, and we are often called in a context 123532a9991fSDavid Sterba * where if reclaim is triggered we can deadlock (we are either holding 123632a9991fSDavid Sterba * a transaction handle or some lock required for a transaction 123732a9991fSDavid Sterba * commit). 123832a9991fSDavid Sterba */ 123932a9991fSDavid Sterba nofs_flag = memalloc_nofs_save(); 124032a9991fSDavid Sterba 124132a9991fSDavid Sterba rkobj = kzalloc(sizeof(*rkobj), GFP_NOFS); 124232a9991fSDavid Sterba if (!rkobj) { 124332a9991fSDavid Sterba memalloc_nofs_restore(nofs_flag); 124432a9991fSDavid Sterba btrfs_warn(cache->fs_info, 124532a9991fSDavid Sterba "couldn't alloc memory for raid level kobject"); 124632a9991fSDavid Sterba return; 124732a9991fSDavid Sterba } 124832a9991fSDavid Sterba 124932a9991fSDavid Sterba rkobj->flags = cache->flags; 125032a9991fSDavid Sterba kobject_init(&rkobj->kobj, &btrfs_raid_ktype); 125149ea112dSJosef Bacik 125249ea112dSJosef Bacik /* 125349ea112dSJosef Bacik * We call this either on mount, or if we've created a block group for a 125449ea112dSJosef Bacik * new index type while running (i.e. when restriping). The running 125549ea112dSJosef Bacik * case is tricky because we could race with other threads, so we need 125649ea112dSJosef Bacik * to have this check to make sure we didn't already init the kobject. 125749ea112dSJosef Bacik * 125849ea112dSJosef Bacik * We don't have to protect on the free side because it only happens on 125949ea112dSJosef Bacik * unmount. 126049ea112dSJosef Bacik */ 126149ea112dSJosef Bacik spin_lock(&space_info->lock); 126249ea112dSJosef Bacik if (space_info->block_group_kobjs[index]) { 126349ea112dSJosef Bacik spin_unlock(&space_info->lock); 126449ea112dSJosef Bacik kobject_put(&rkobj->kobj); 126549ea112dSJosef Bacik return; 126649ea112dSJosef Bacik } else { 126749ea112dSJosef Bacik space_info->block_group_kobjs[index] = &rkobj->kobj; 126849ea112dSJosef Bacik } 126949ea112dSJosef Bacik spin_unlock(&space_info->lock); 127049ea112dSJosef Bacik 127132a9991fSDavid Sterba ret = kobject_add(&rkobj->kobj, &space_info->kobj, "%s", 127232a9991fSDavid Sterba btrfs_bg_type_to_raid_name(rkobj->flags)); 127332a9991fSDavid Sterba memalloc_nofs_restore(nofs_flag); 127432a9991fSDavid Sterba if (ret) { 127549ea112dSJosef Bacik spin_lock(&space_info->lock); 127649ea112dSJosef Bacik space_info->block_group_kobjs[index] = NULL; 127749ea112dSJosef Bacik spin_unlock(&space_info->lock); 127832a9991fSDavid Sterba kobject_put(&rkobj->kobj); 127932a9991fSDavid Sterba btrfs_warn(fs_info, 128032a9991fSDavid Sterba "failed to add kobject for block cache, ignoring"); 128132a9991fSDavid Sterba return; 128232a9991fSDavid Sterba } 128332a9991fSDavid Sterba } 128432a9991fSDavid Sterba 1285b5865babSDavid Sterba /* 1286b5865babSDavid Sterba * Remove sysfs directories for all block group types of a given space info and 1287b5865babSDavid Sterba * the space info as well 1288b5865babSDavid Sterba */ 1289b5865babSDavid Sterba void btrfs_sysfs_remove_space_info(struct btrfs_space_info *space_info) 1290b5865babSDavid Sterba { 1291b5865babSDavid Sterba int i; 1292b5865babSDavid Sterba 1293b5865babSDavid Sterba for (i = 0; i < BTRFS_NR_RAID_TYPES; i++) { 1294b5865babSDavid Sterba struct kobject *kobj; 1295b5865babSDavid Sterba 1296b5865babSDavid Sterba kobj = space_info->block_group_kobjs[i]; 1297b5865babSDavid Sterba space_info->block_group_kobjs[i] = NULL; 1298b5865babSDavid Sterba if (kobj) { 1299b5865babSDavid Sterba kobject_del(kobj); 1300b5865babSDavid Sterba kobject_put(kobj); 1301b5865babSDavid Sterba } 1302b5865babSDavid Sterba } 1303b5865babSDavid Sterba kobject_del(&space_info->kobj); 1304b5865babSDavid Sterba kobject_put(&space_info->kobj); 1305b5865babSDavid Sterba } 1306b5865babSDavid Sterba 1307b882327aSDavid Sterba static const char *alloc_name(u64 flags) 1308b882327aSDavid Sterba { 1309b882327aSDavid Sterba switch (flags) { 1310b882327aSDavid Sterba case BTRFS_BLOCK_GROUP_METADATA | BTRFS_BLOCK_GROUP_DATA: 1311b882327aSDavid Sterba return "mixed"; 1312b882327aSDavid Sterba case BTRFS_BLOCK_GROUP_METADATA: 1313b882327aSDavid Sterba return "metadata"; 1314b882327aSDavid Sterba case BTRFS_BLOCK_GROUP_DATA: 1315b882327aSDavid Sterba return "data"; 1316b882327aSDavid Sterba case BTRFS_BLOCK_GROUP_SYSTEM: 1317b882327aSDavid Sterba return "system"; 1318b882327aSDavid Sterba default: 1319b882327aSDavid Sterba WARN_ON(1); 1320b882327aSDavid Sterba return "invalid-combination"; 1321445d8ab5STom Rix } 1322b882327aSDavid Sterba } 1323b882327aSDavid Sterba 1324b882327aSDavid Sterba /* 1325b882327aSDavid Sterba * Create a sysfs entry for a space info type at path 1326b882327aSDavid Sterba * /sys/fs/btrfs/UUID/allocation/TYPE 1327b882327aSDavid Sterba */ 1328b882327aSDavid Sterba int btrfs_sysfs_add_space_info_type(struct btrfs_fs_info *fs_info, 1329b882327aSDavid Sterba struct btrfs_space_info *space_info) 1330b882327aSDavid Sterba { 1331b882327aSDavid Sterba int ret; 1332b882327aSDavid Sterba 1333b882327aSDavid Sterba ret = kobject_init_and_add(&space_info->kobj, &space_info_ktype, 1334b882327aSDavid Sterba fs_info->space_info_kobj, "%s", 1335b882327aSDavid Sterba alloc_name(space_info->flags)); 1336b882327aSDavid Sterba if (ret) { 1337b882327aSDavid Sterba kobject_put(&space_info->kobj); 1338b882327aSDavid Sterba return ret; 1339b882327aSDavid Sterba } 1340b882327aSDavid Sterba 1341b882327aSDavid Sterba return 0; 1342b882327aSDavid Sterba } 1343b882327aSDavid Sterba 134453f8a74cSAnand Jain void btrfs_sysfs_remove_device(struct btrfs_device *device) 134599994cdeSAnand Jain { 134699994cdeSAnand Jain struct hd_struct *disk; 134799994cdeSAnand Jain struct kobject *disk_kobj; 1348985e233eSAnand Jain struct kobject *devices_kobj; 134999994cdeSAnand Jain 1350985e233eSAnand Jain /* 1351985e233eSAnand Jain * Seed fs_devices devices_kobj aren't used, fetch kobject from the 1352985e233eSAnand Jain * fs_info::fs_devices. 1353985e233eSAnand Jain */ 1354985e233eSAnand Jain devices_kobj = device->fs_info->fs_devices->devices_kobj; 1355985e233eSAnand Jain ASSERT(devices_kobj); 135699994cdeSAnand Jain 1357985e233eSAnand Jain if (device->bdev) { 1358985e233eSAnand Jain disk = device->bdev->bd_part; 135999994cdeSAnand Jain disk_kobj = &part_to_dev(disk)->kobj; 1360985e233eSAnand Jain sysfs_remove_link(devices_kobj, disk_kobj->name); 136199994cdeSAnand Jain } 136299994cdeSAnand Jain 1363985e233eSAnand Jain if (device->devid_kobj.state_initialized) { 1364985e233eSAnand Jain kobject_del(&device->devid_kobj); 1365985e233eSAnand Jain kobject_put(&device->devid_kobj); 1366985e233eSAnand Jain wait_for_completion(&device->kobj_unregister); 1367985e233eSAnand Jain } 1368b5ddcffaSAnand Jain } 1369668e48afSAnand Jain 1370668e48afSAnand Jain static ssize_t btrfs_devinfo_in_fs_metadata_show(struct kobject *kobj, 1371668e48afSAnand Jain struct kobj_attribute *a, 1372668e48afSAnand Jain char *buf) 1373668e48afSAnand Jain { 1374668e48afSAnand Jain int val; 1375668e48afSAnand Jain struct btrfs_device *device = container_of(kobj, struct btrfs_device, 1376668e48afSAnand Jain devid_kobj); 1377668e48afSAnand Jain 1378668e48afSAnand Jain val = !!test_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &device->dev_state); 1379668e48afSAnand Jain 1380abdd9febSTakashi Iwai return scnprintf(buf, PAGE_SIZE, "%d\n", val); 1381668e48afSAnand Jain } 1382668e48afSAnand Jain BTRFS_ATTR(devid, in_fs_metadata, btrfs_devinfo_in_fs_metadata_show); 1383668e48afSAnand Jain 138425864778SAnand Jain static ssize_t btrfs_devinfo_missing_show(struct kobject *kobj, 1385668e48afSAnand Jain struct kobj_attribute *a, char *buf) 1386668e48afSAnand Jain { 1387668e48afSAnand Jain int val; 1388668e48afSAnand Jain struct btrfs_device *device = container_of(kobj, struct btrfs_device, 1389668e48afSAnand Jain devid_kobj); 1390668e48afSAnand Jain 1391668e48afSAnand Jain val = !!test_bit(BTRFS_DEV_STATE_MISSING, &device->dev_state); 1392668e48afSAnand Jain 1393abdd9febSTakashi Iwai return scnprintf(buf, PAGE_SIZE, "%d\n", val); 1394668e48afSAnand Jain } 139525864778SAnand Jain BTRFS_ATTR(devid, missing, btrfs_devinfo_missing_show); 1396668e48afSAnand Jain 1397668e48afSAnand Jain static ssize_t btrfs_devinfo_replace_target_show(struct kobject *kobj, 1398668e48afSAnand Jain struct kobj_attribute *a, 1399668e48afSAnand Jain char *buf) 1400668e48afSAnand Jain { 1401668e48afSAnand Jain int val; 1402668e48afSAnand Jain struct btrfs_device *device = container_of(kobj, struct btrfs_device, 1403668e48afSAnand Jain devid_kobj); 1404668e48afSAnand Jain 1405668e48afSAnand Jain val = !!test_bit(BTRFS_DEV_STATE_REPLACE_TGT, &device->dev_state); 1406668e48afSAnand Jain 1407abdd9febSTakashi Iwai return scnprintf(buf, PAGE_SIZE, "%d\n", val); 1408668e48afSAnand Jain } 1409668e48afSAnand Jain BTRFS_ATTR(devid, replace_target, btrfs_devinfo_replace_target_show); 1410668e48afSAnand Jain 1411668e48afSAnand Jain static ssize_t btrfs_devinfo_writeable_show(struct kobject *kobj, 1412668e48afSAnand Jain struct kobj_attribute *a, char *buf) 1413668e48afSAnand Jain { 1414668e48afSAnand Jain int val; 1415668e48afSAnand Jain struct btrfs_device *device = container_of(kobj, struct btrfs_device, 1416668e48afSAnand Jain devid_kobj); 1417668e48afSAnand Jain 1418668e48afSAnand Jain val = !!test_bit(BTRFS_DEV_STATE_WRITEABLE, &device->dev_state); 1419668e48afSAnand Jain 1420abdd9febSTakashi Iwai return scnprintf(buf, PAGE_SIZE, "%d\n", val); 1421668e48afSAnand Jain } 1422668e48afSAnand Jain BTRFS_ATTR(devid, writeable, btrfs_devinfo_writeable_show); 1423668e48afSAnand Jain 1424668e48afSAnand Jain static struct attribute *devid_attrs[] = { 1425668e48afSAnand Jain BTRFS_ATTR_PTR(devid, in_fs_metadata), 1426668e48afSAnand Jain BTRFS_ATTR_PTR(devid, missing), 1427668e48afSAnand Jain BTRFS_ATTR_PTR(devid, replace_target), 1428668e48afSAnand Jain BTRFS_ATTR_PTR(devid, writeable), 1429668e48afSAnand Jain NULL 1430668e48afSAnand Jain }; 1431668e48afSAnand Jain ATTRIBUTE_GROUPS(devid); 1432668e48afSAnand Jain 1433668e48afSAnand Jain static void btrfs_release_devid_kobj(struct kobject *kobj) 1434668e48afSAnand Jain { 1435668e48afSAnand Jain struct btrfs_device *device = container_of(kobj, struct btrfs_device, 1436668e48afSAnand Jain devid_kobj); 1437668e48afSAnand Jain 1438668e48afSAnand Jain memset(&device->devid_kobj, 0, sizeof(struct kobject)); 1439668e48afSAnand Jain complete(&device->kobj_unregister); 1440668e48afSAnand Jain } 1441668e48afSAnand Jain 1442668e48afSAnand Jain static struct kobj_type devid_ktype = { 1443668e48afSAnand Jain .sysfs_ops = &kobj_sysfs_ops, 1444668e48afSAnand Jain .default_groups = devid_groups, 1445668e48afSAnand Jain .release = btrfs_release_devid_kobj, 1446668e48afSAnand Jain }; 1447668e48afSAnand Jain 1448cd36da2eSAnand Jain int btrfs_sysfs_add_device(struct btrfs_device *device) 144929e5be24SJeff Mahoney { 1450178a16c9SAnand Jain int ret; 1451a47bd78dSJosef Bacik unsigned int nofs_flag; 1452178a16c9SAnand Jain struct kobject *devices_kobj; 1453178a16c9SAnand Jain struct kobject *devinfo_kobj; 1454178a16c9SAnand Jain 1455178a16c9SAnand Jain /* 1456178a16c9SAnand Jain * Make sure we use the fs_info::fs_devices to fetch the kobjects even 1457178a16c9SAnand Jain * for the seed fs_devices 1458178a16c9SAnand Jain */ 1459178a16c9SAnand Jain devices_kobj = device->fs_info->fs_devices->devices_kobj; 1460178a16c9SAnand Jain devinfo_kobj = device->fs_info->fs_devices->devinfo_kobj; 1461178a16c9SAnand Jain ASSERT(devices_kobj); 1462178a16c9SAnand Jain ASSERT(devinfo_kobj); 146329e5be24SJeff Mahoney 1464a47bd78dSJosef Bacik nofs_flag = memalloc_nofs_save(); 1465f085381eSAnand Jain 1466178a16c9SAnand Jain if (device->bdev) { 1467668e48afSAnand Jain struct hd_struct *disk; 1468668e48afSAnand Jain struct kobject *disk_kobj; 1469668e48afSAnand Jain 1470178a16c9SAnand Jain disk = device->bdev->bd_part; 1471f085381eSAnand Jain disk_kobj = &part_to_dev(disk)->kobj; 147229e5be24SJeff Mahoney 1473178a16c9SAnand Jain ret = sysfs_create_link(devices_kobj, disk_kobj, disk_kobj->name); 1474178a16c9SAnand Jain if (ret) { 1475178a16c9SAnand Jain btrfs_warn(device->fs_info, 1476178a16c9SAnand Jain "creating sysfs device link for devid %llu failed: %d", 1477178a16c9SAnand Jain device->devid, ret); 1478178a16c9SAnand Jain goto out; 1479178a16c9SAnand Jain } 148029e5be24SJeff Mahoney } 148129e5be24SJeff Mahoney 1482178a16c9SAnand Jain init_completion(&device->kobj_unregister); 1483178a16c9SAnand Jain ret = kobject_init_and_add(&device->devid_kobj, &devid_ktype, 1484178a16c9SAnand Jain devinfo_kobj, "%llu", device->devid); 1485178a16c9SAnand Jain if (ret) { 1486178a16c9SAnand Jain kobject_put(&device->devid_kobj); 1487178a16c9SAnand Jain btrfs_warn(device->fs_info, 1488178a16c9SAnand Jain "devinfo init for devid %llu failed: %d", 1489178a16c9SAnand Jain device->devid, ret); 1490668e48afSAnand Jain } 1491178a16c9SAnand Jain 1492178a16c9SAnand Jain out: 1493a47bd78dSJosef Bacik memalloc_nofs_restore(nofs_flag); 1494178a16c9SAnand Jain return ret; 1495178a16c9SAnand Jain } 1496668e48afSAnand Jain 1497cd36da2eSAnand Jain static int btrfs_sysfs_add_fs_devices(struct btrfs_fs_devices *fs_devices) 1498178a16c9SAnand Jain { 1499178a16c9SAnand Jain int ret; 1500cd36da2eSAnand Jain struct btrfs_device *device; 150130b0e4e0SAnand Jain struct btrfs_fs_devices *seed; 1502178a16c9SAnand Jain 1503178a16c9SAnand Jain list_for_each_entry(device, &fs_devices->devices, dev_list) { 1504178a16c9SAnand Jain ret = btrfs_sysfs_add_device(device); 1505178a16c9SAnand Jain if (ret) 15067ad3912aSAnand Jain goto fail; 1507178a16c9SAnand Jain } 1508178a16c9SAnand Jain 150930b0e4e0SAnand Jain list_for_each_entry(seed, &fs_devices->seed_list, seed_list) { 151030b0e4e0SAnand Jain list_for_each_entry(device, &seed->devices, dev_list) { 151130b0e4e0SAnand Jain ret = btrfs_sysfs_add_device(device); 151230b0e4e0SAnand Jain if (ret) 15137ad3912aSAnand Jain goto fail; 151430b0e4e0SAnand Jain } 151530b0e4e0SAnand Jain } 151630b0e4e0SAnand Jain 1517178a16c9SAnand Jain return 0; 15187ad3912aSAnand Jain 15197ad3912aSAnand Jain fail: 15207ad3912aSAnand Jain btrfs_sysfs_remove_fs_devices(fs_devices); 15217ad3912aSAnand Jain return ret; 152229e5be24SJeff Mahoney } 152329e5be24SJeff Mahoney 15245b28692eSDavid Sterba void btrfs_kobject_uevent(struct block_device *bdev, enum kobject_action action) 15255b28692eSDavid Sterba { 15265b28692eSDavid Sterba int ret; 15275b28692eSDavid Sterba 15285b28692eSDavid Sterba ret = kobject_uevent(&disk_to_dev(bdev->bd_disk)->kobj, action); 15295b28692eSDavid Sterba if (ret) 15305b28692eSDavid Sterba pr_warn("BTRFS: Sending event '%d' to kobject: '%s' (%p): failed\n", 15315b28692eSDavid Sterba action, kobject_name(&disk_to_dev(bdev->bd_disk)->kobj), 15325b28692eSDavid Sterba &disk_to_dev(bdev->bd_disk)->kobj); 15335b28692eSDavid Sterba } 15345b28692eSDavid Sterba 15358e560081SNikolay Borisov void btrfs_sysfs_update_sprout_fsid(struct btrfs_fs_devices *fs_devices) 15368e560081SNikolay Borisov 1537f93c3997SDavid Sterba { 1538f93c3997SDavid Sterba char fsid_buf[BTRFS_UUID_UNPARSED_SIZE]; 1539f93c3997SDavid Sterba 1540f93c3997SDavid Sterba /* 1541f93c3997SDavid Sterba * Sprouting changes fsid of the mounted filesystem, rename the fsid 1542f93c3997SDavid Sterba * directory 1543f93c3997SDavid Sterba */ 15448e560081SNikolay Borisov snprintf(fsid_buf, BTRFS_UUID_UNPARSED_SIZE, "%pU", fs_devices->fsid); 1545f93c3997SDavid Sterba if (kobject_rename(&fs_devices->fsid_kobj, fsid_buf)) 1546f93c3997SDavid Sterba btrfs_warn(fs_devices->fs_info, 1547f93c3997SDavid Sterba "sysfs: failed to create fsid for sprout"); 1548f93c3997SDavid Sterba } 1549f93c3997SDavid Sterba 1550668e48afSAnand Jain void btrfs_sysfs_update_devid(struct btrfs_device *device) 1551668e48afSAnand Jain { 1552668e48afSAnand Jain char tmp[24]; 1553668e48afSAnand Jain 1554668e48afSAnand Jain snprintf(tmp, sizeof(tmp), "%llu", device->devid); 1555668e48afSAnand Jain 1556668e48afSAnand Jain if (kobject_rename(&device->devid_kobj, tmp)) 1557668e48afSAnand Jain btrfs_warn(device->fs_devices->fs_info, 1558668e48afSAnand Jain "sysfs: failed to update devid for %llu", 1559668e48afSAnand Jain device->devid); 1560668e48afSAnand Jain } 1561668e48afSAnand Jain 1562510d7360SJeff Mahoney /* /sys/fs/btrfs/ entry */ 1563510d7360SJeff Mahoney static struct kset *btrfs_kset; 1564510d7360SJeff Mahoney 156572059215SAnand Jain /* 1566c6761a9eSAnand Jain * Creates: 1567c6761a9eSAnand Jain * /sys/fs/btrfs/UUID 1568c6761a9eSAnand Jain * 156972059215SAnand Jain * Can be called by the device discovery thread. 157072059215SAnand Jain */ 1571c6761a9eSAnand Jain int btrfs_sysfs_add_fsid(struct btrfs_fs_devices *fs_devs) 15725ac1d209SJeff Mahoney { 15735ac1d209SJeff Mahoney int error; 15745ac1d209SJeff Mahoney 15752e7910d6SAnand Jain init_completion(&fs_devs->kobj_unregister); 1576c1b7e474SAnand Jain fs_devs->fsid_kobj.kset = btrfs_kset; 1577c6761a9eSAnand Jain error = kobject_init_and_add(&fs_devs->fsid_kobj, &btrfs_ktype, NULL, 1578c6761a9eSAnand Jain "%pU", fs_devs->fsid); 1579e3277335STobin C. Harding if (error) { 1580e3277335STobin C. Harding kobject_put(&fs_devs->fsid_kobj); 158172059215SAnand Jain return error; 158272059215SAnand Jain } 158372059215SAnand Jain 1584bc036bb3SAnand Jain fs_devs->devices_kobj = kobject_create_and_add("devices", 1585bc036bb3SAnand Jain &fs_devs->fsid_kobj); 1586bc036bb3SAnand Jain if (!fs_devs->devices_kobj) { 1587bc036bb3SAnand Jain btrfs_err(fs_devs->fs_info, 1588bc036bb3SAnand Jain "failed to init sysfs device interface"); 15891f6087e6SAnand Jain btrfs_sysfs_remove_fsid(fs_devs); 1590bc036bb3SAnand Jain return -ENOMEM; 1591bc036bb3SAnand Jain } 1592bc036bb3SAnand Jain 1593a013d141SAnand Jain fs_devs->devinfo_kobj = kobject_create_and_add("devinfo", 1594a013d141SAnand Jain &fs_devs->fsid_kobj); 1595a013d141SAnand Jain if (!fs_devs->devinfo_kobj) { 1596a013d141SAnand Jain btrfs_err(fs_devs->fs_info, 1597a013d141SAnand Jain "failed to init sysfs devinfo kobject"); 1598a013d141SAnand Jain btrfs_sysfs_remove_fsid(fs_devs); 1599a013d141SAnand Jain return -ENOMEM; 1600a013d141SAnand Jain } 1601a013d141SAnand Jain 1602e3277335STobin C. Harding return 0; 1603e3277335STobin C. Harding } 1604e3277335STobin C. Harding 160596f3136eSAnand Jain int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info) 160672059215SAnand Jain { 160772059215SAnand Jain int error; 16082e7910d6SAnand Jain struct btrfs_fs_devices *fs_devs = fs_info->fs_devices; 1609c1b7e474SAnand Jain struct kobject *fsid_kobj = &fs_devs->fsid_kobj; 161072059215SAnand Jain 1611cd36da2eSAnand Jain error = btrfs_sysfs_add_fs_devices(fs_devs); 1612e453d989SJeff Mahoney if (error) 1613e453d989SJeff Mahoney return error; 1614510d7360SJeff Mahoney 1615c1b7e474SAnand Jain error = sysfs_create_files(fsid_kobj, btrfs_attrs); 1616e453d989SJeff Mahoney if (error) { 161753f8a74cSAnand Jain btrfs_sysfs_remove_fs_devices(fs_devs); 1618e453d989SJeff Mahoney return error; 1619e453d989SJeff Mahoney } 162079da4fa4SJeff Mahoney 1621c1b7e474SAnand Jain error = sysfs_create_group(fsid_kobj, 16220dd2906fSAnand Jain &btrfs_feature_attr_group); 16230dd2906fSAnand Jain if (error) 16240dd2906fSAnand Jain goto failure; 16250dd2906fSAnand Jain 16266e369febSDavid Sterba #ifdef CONFIG_BTRFS_DEBUG 162793945cb4SDennis Zhou fs_info->debug_kobj = kobject_create_and_add("debug", fsid_kobj); 162893945cb4SDennis Zhou if (!fs_info->debug_kobj) { 162993945cb4SDennis Zhou error = -ENOMEM; 163093945cb4SDennis Zhou goto failure; 163193945cb4SDennis Zhou } 163293945cb4SDennis Zhou 163393945cb4SDennis Zhou error = sysfs_create_files(fs_info->debug_kobj, btrfs_debug_mount_attrs); 16346e369febSDavid Sterba if (error) 16356e369febSDavid Sterba goto failure; 1636e4faab84SDennis Zhou 1637e4faab84SDennis Zhou /* Discard directory */ 1638e4faab84SDennis Zhou fs_info->discard_debug_kobj = kobject_create_and_add("discard", 1639e4faab84SDennis Zhou fs_info->debug_kobj); 1640e4faab84SDennis Zhou if (!fs_info->discard_debug_kobj) { 1641e4faab84SDennis Zhou error = -ENOMEM; 1642e4faab84SDennis Zhou goto failure; 1643e4faab84SDennis Zhou } 1644e4faab84SDennis Zhou 1645e4faab84SDennis Zhou error = sysfs_create_files(fs_info->discard_debug_kobj, 1646e4faab84SDennis Zhou discard_debug_attrs); 1647e4faab84SDennis Zhou if (error) 1648e4faab84SDennis Zhou goto failure; 16496e369febSDavid Sterba #endif 16506e369febSDavid Sterba 1651e453d989SJeff Mahoney error = addrm_unknown_feature_attrs(fs_info, true); 165279da4fa4SJeff Mahoney if (error) 165379da4fa4SJeff Mahoney goto failure; 165479da4fa4SJeff Mahoney 16553092c68fSNikolay Borisov error = sysfs_create_link(fsid_kobj, &fs_info->sb->s_bdi->dev->kobj, "bdi"); 16563092c68fSNikolay Borisov if (error) 16573092c68fSNikolay Borisov goto failure; 16583092c68fSNikolay Borisov 16596ab0a202SJeff Mahoney fs_info->space_info_kobj = kobject_create_and_add("allocation", 1660c1b7e474SAnand Jain fsid_kobj); 16616ab0a202SJeff Mahoney if (!fs_info->space_info_kobj) { 16626ab0a202SJeff Mahoney error = -ENOMEM; 16636ab0a202SJeff Mahoney goto failure; 16646ab0a202SJeff Mahoney } 16656ab0a202SJeff Mahoney 16666ab0a202SJeff Mahoney error = sysfs_create_files(fs_info->space_info_kobj, allocation_attrs); 16676ab0a202SJeff Mahoney if (error) 16686ab0a202SJeff Mahoney goto failure; 16696ab0a202SJeff Mahoney 167079da4fa4SJeff Mahoney return 0; 167179da4fa4SJeff Mahoney failure: 16726618a59bSAnand Jain btrfs_sysfs_remove_mounted(fs_info); 16735ac1d209SJeff Mahoney return error; 16745ac1d209SJeff Mahoney } 16755ac1d209SJeff Mahoney 167649e5fb46SQu Wenruo static inline struct btrfs_fs_info *qgroup_kobj_to_fs_info(struct kobject *kobj) 167749e5fb46SQu Wenruo { 167849e5fb46SQu Wenruo return to_fs_info(kobj->parent->parent); 167949e5fb46SQu Wenruo } 168049e5fb46SQu Wenruo 168149e5fb46SQu Wenruo #define QGROUP_ATTR(_member, _show_name) \ 168249e5fb46SQu Wenruo static ssize_t btrfs_qgroup_show_##_member(struct kobject *qgroup_kobj, \ 168349e5fb46SQu Wenruo struct kobj_attribute *a, \ 168449e5fb46SQu Wenruo char *buf) \ 168549e5fb46SQu Wenruo { \ 168649e5fb46SQu Wenruo struct btrfs_fs_info *fs_info = qgroup_kobj_to_fs_info(qgroup_kobj); \ 168749e5fb46SQu Wenruo struct btrfs_qgroup *qgroup = container_of(qgroup_kobj, \ 168849e5fb46SQu Wenruo struct btrfs_qgroup, kobj); \ 168949e5fb46SQu Wenruo return btrfs_show_u64(&qgroup->_member, &fs_info->qgroup_lock, buf); \ 169049e5fb46SQu Wenruo } \ 169149e5fb46SQu Wenruo BTRFS_ATTR(qgroup, _show_name, btrfs_qgroup_show_##_member) 169249e5fb46SQu Wenruo 169349e5fb46SQu Wenruo #define QGROUP_RSV_ATTR(_name, _type) \ 169449e5fb46SQu Wenruo static ssize_t btrfs_qgroup_rsv_show_##_name(struct kobject *qgroup_kobj, \ 169549e5fb46SQu Wenruo struct kobj_attribute *a, \ 169649e5fb46SQu Wenruo char *buf) \ 169749e5fb46SQu Wenruo { \ 169849e5fb46SQu Wenruo struct btrfs_fs_info *fs_info = qgroup_kobj_to_fs_info(qgroup_kobj); \ 169949e5fb46SQu Wenruo struct btrfs_qgroup *qgroup = container_of(qgroup_kobj, \ 170049e5fb46SQu Wenruo struct btrfs_qgroup, kobj); \ 170149e5fb46SQu Wenruo return btrfs_show_u64(&qgroup->rsv.values[_type], \ 170249e5fb46SQu Wenruo &fs_info->qgroup_lock, buf); \ 170349e5fb46SQu Wenruo } \ 170449e5fb46SQu Wenruo BTRFS_ATTR(qgroup, rsv_##_name, btrfs_qgroup_rsv_show_##_name) 170549e5fb46SQu Wenruo 170649e5fb46SQu Wenruo QGROUP_ATTR(rfer, referenced); 170749e5fb46SQu Wenruo QGROUP_ATTR(excl, exclusive); 170849e5fb46SQu Wenruo QGROUP_ATTR(max_rfer, max_referenced); 170949e5fb46SQu Wenruo QGROUP_ATTR(max_excl, max_exclusive); 171049e5fb46SQu Wenruo QGROUP_ATTR(lim_flags, limit_flags); 171149e5fb46SQu Wenruo QGROUP_RSV_ATTR(data, BTRFS_QGROUP_RSV_DATA); 171249e5fb46SQu Wenruo QGROUP_RSV_ATTR(meta_pertrans, BTRFS_QGROUP_RSV_META_PERTRANS); 171349e5fb46SQu Wenruo QGROUP_RSV_ATTR(meta_prealloc, BTRFS_QGROUP_RSV_META_PREALLOC); 171449e5fb46SQu Wenruo 171549e5fb46SQu Wenruo static struct attribute *qgroup_attrs[] = { 171649e5fb46SQu Wenruo BTRFS_ATTR_PTR(qgroup, referenced), 171749e5fb46SQu Wenruo BTRFS_ATTR_PTR(qgroup, exclusive), 171849e5fb46SQu Wenruo BTRFS_ATTR_PTR(qgroup, max_referenced), 171949e5fb46SQu Wenruo BTRFS_ATTR_PTR(qgroup, max_exclusive), 172049e5fb46SQu Wenruo BTRFS_ATTR_PTR(qgroup, limit_flags), 172149e5fb46SQu Wenruo BTRFS_ATTR_PTR(qgroup, rsv_data), 172249e5fb46SQu Wenruo BTRFS_ATTR_PTR(qgroup, rsv_meta_pertrans), 172349e5fb46SQu Wenruo BTRFS_ATTR_PTR(qgroup, rsv_meta_prealloc), 172449e5fb46SQu Wenruo NULL 172549e5fb46SQu Wenruo }; 172649e5fb46SQu Wenruo ATTRIBUTE_GROUPS(qgroup); 172749e5fb46SQu Wenruo 172849e5fb46SQu Wenruo static void qgroup_release(struct kobject *kobj) 172949e5fb46SQu Wenruo { 173049e5fb46SQu Wenruo struct btrfs_qgroup *qgroup = container_of(kobj, struct btrfs_qgroup, kobj); 173149e5fb46SQu Wenruo 173249e5fb46SQu Wenruo memset(&qgroup->kobj, 0, sizeof(*kobj)); 173349e5fb46SQu Wenruo } 173449e5fb46SQu Wenruo 173549e5fb46SQu Wenruo static struct kobj_type qgroup_ktype = { 173649e5fb46SQu Wenruo .sysfs_ops = &kobj_sysfs_ops, 173749e5fb46SQu Wenruo .release = qgroup_release, 173849e5fb46SQu Wenruo .default_groups = qgroup_groups, 173949e5fb46SQu Wenruo }; 174049e5fb46SQu Wenruo 174149e5fb46SQu Wenruo int btrfs_sysfs_add_one_qgroup(struct btrfs_fs_info *fs_info, 174249e5fb46SQu Wenruo struct btrfs_qgroup *qgroup) 174349e5fb46SQu Wenruo { 174449e5fb46SQu Wenruo struct kobject *qgroups_kobj = fs_info->qgroups_kobj; 174549e5fb46SQu Wenruo int ret; 174649e5fb46SQu Wenruo 174749e5fb46SQu Wenruo if (test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state)) 174849e5fb46SQu Wenruo return 0; 174949e5fb46SQu Wenruo if (qgroup->kobj.state_initialized) 175049e5fb46SQu Wenruo return 0; 175149e5fb46SQu Wenruo if (!qgroups_kobj) 175249e5fb46SQu Wenruo return -EINVAL; 175349e5fb46SQu Wenruo 175449e5fb46SQu Wenruo ret = kobject_init_and_add(&qgroup->kobj, &qgroup_ktype, qgroups_kobj, 175549e5fb46SQu Wenruo "%hu_%llu", btrfs_qgroup_level(qgroup->qgroupid), 175649e5fb46SQu Wenruo btrfs_qgroup_subvolid(qgroup->qgroupid)); 175749e5fb46SQu Wenruo if (ret < 0) 175849e5fb46SQu Wenruo kobject_put(&qgroup->kobj); 175949e5fb46SQu Wenruo 176049e5fb46SQu Wenruo return ret; 176149e5fb46SQu Wenruo } 176249e5fb46SQu Wenruo 176349e5fb46SQu Wenruo void btrfs_sysfs_del_qgroups(struct btrfs_fs_info *fs_info) 176449e5fb46SQu Wenruo { 176549e5fb46SQu Wenruo struct btrfs_qgroup *qgroup; 176649e5fb46SQu Wenruo struct btrfs_qgroup *next; 176749e5fb46SQu Wenruo 176849e5fb46SQu Wenruo if (test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state)) 176949e5fb46SQu Wenruo return; 177049e5fb46SQu Wenruo 177149e5fb46SQu Wenruo rbtree_postorder_for_each_entry_safe(qgroup, next, 177249e5fb46SQu Wenruo &fs_info->qgroup_tree, node) 177349e5fb46SQu Wenruo btrfs_sysfs_del_one_qgroup(fs_info, qgroup); 177462ab2cc0SQu Wenruo if (fs_info->qgroups_kobj) { 177549e5fb46SQu Wenruo kobject_del(fs_info->qgroups_kobj); 177649e5fb46SQu Wenruo kobject_put(fs_info->qgroups_kobj); 177749e5fb46SQu Wenruo fs_info->qgroups_kobj = NULL; 177849e5fb46SQu Wenruo } 177962ab2cc0SQu Wenruo } 178049e5fb46SQu Wenruo 178149e5fb46SQu Wenruo /* Called when qgroups get initialized, thus there is no need for locking */ 178249e5fb46SQu Wenruo int btrfs_sysfs_add_qgroups(struct btrfs_fs_info *fs_info) 178349e5fb46SQu Wenruo { 178449e5fb46SQu Wenruo struct kobject *fsid_kobj = &fs_info->fs_devices->fsid_kobj; 178549e5fb46SQu Wenruo struct btrfs_qgroup *qgroup; 178649e5fb46SQu Wenruo struct btrfs_qgroup *next; 178749e5fb46SQu Wenruo int ret = 0; 178849e5fb46SQu Wenruo 178949e5fb46SQu Wenruo if (test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state)) 179049e5fb46SQu Wenruo return 0; 179149e5fb46SQu Wenruo 179249e5fb46SQu Wenruo ASSERT(fsid_kobj); 179349e5fb46SQu Wenruo if (fs_info->qgroups_kobj) 179449e5fb46SQu Wenruo return 0; 179549e5fb46SQu Wenruo 179649e5fb46SQu Wenruo fs_info->qgroups_kobj = kobject_create_and_add("qgroups", fsid_kobj); 179749e5fb46SQu Wenruo if (!fs_info->qgroups_kobj) { 179849e5fb46SQu Wenruo ret = -ENOMEM; 179949e5fb46SQu Wenruo goto out; 180049e5fb46SQu Wenruo } 180149e5fb46SQu Wenruo rbtree_postorder_for_each_entry_safe(qgroup, next, 180249e5fb46SQu Wenruo &fs_info->qgroup_tree, node) { 180349e5fb46SQu Wenruo ret = btrfs_sysfs_add_one_qgroup(fs_info, qgroup); 180449e5fb46SQu Wenruo if (ret < 0) 180549e5fb46SQu Wenruo goto out; 180649e5fb46SQu Wenruo } 180749e5fb46SQu Wenruo 180849e5fb46SQu Wenruo out: 180949e5fb46SQu Wenruo if (ret < 0) 181049e5fb46SQu Wenruo btrfs_sysfs_del_qgroups(fs_info); 181149e5fb46SQu Wenruo return ret; 181249e5fb46SQu Wenruo } 181349e5fb46SQu Wenruo 181449e5fb46SQu Wenruo void btrfs_sysfs_del_one_qgroup(struct btrfs_fs_info *fs_info, 181549e5fb46SQu Wenruo struct btrfs_qgroup *qgroup) 181649e5fb46SQu Wenruo { 181749e5fb46SQu Wenruo if (test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state)) 181849e5fb46SQu Wenruo return; 181949e5fb46SQu Wenruo 182049e5fb46SQu Wenruo if (qgroup->kobj.state_initialized) { 182149e5fb46SQu Wenruo kobject_del(&qgroup->kobj); 182249e5fb46SQu Wenruo kobject_put(&qgroup->kobj); 182349e5fb46SQu Wenruo } 182449e5fb46SQu Wenruo } 1825444e7516SDavid Sterba 1826444e7516SDavid Sterba /* 1827444e7516SDavid Sterba * Change per-fs features in /sys/fs/btrfs/UUID/features to match current 1828444e7516SDavid Sterba * values in superblock. Call after any changes to incompat/compat_ro flags 1829444e7516SDavid Sterba */ 1830444e7516SDavid Sterba void btrfs_sysfs_feature_update(struct btrfs_fs_info *fs_info, 1831444e7516SDavid Sterba u64 bit, enum btrfs_feature_set set) 1832444e7516SDavid Sterba { 1833444e7516SDavid Sterba struct btrfs_fs_devices *fs_devs; 1834444e7516SDavid Sterba struct kobject *fsid_kobj; 183524646481SLeon Romanovsky u64 __maybe_unused features; 183624646481SLeon Romanovsky int __maybe_unused ret; 1837444e7516SDavid Sterba 1838444e7516SDavid Sterba if (!fs_info) 1839444e7516SDavid Sterba return; 1840444e7516SDavid Sterba 184124646481SLeon Romanovsky /* 184224646481SLeon Romanovsky * See 14e46e04958df74 and e410e34fad913dd, feature bit updates are not 184324646481SLeon Romanovsky * safe when called from some contexts (eg. balance) 184424646481SLeon Romanovsky */ 1845444e7516SDavid Sterba features = get_features(fs_info, set); 1846444e7516SDavid Sterba ASSERT(bit & supported_feature_masks[set]); 1847444e7516SDavid Sterba 1848444e7516SDavid Sterba fs_devs = fs_info->fs_devices; 1849444e7516SDavid Sterba fsid_kobj = &fs_devs->fsid_kobj; 1850444e7516SDavid Sterba 1851bf609206SDavid Sterba if (!fsid_kobj->state_initialized) 1852bf609206SDavid Sterba return; 1853bf609206SDavid Sterba 1854444e7516SDavid Sterba /* 1855444e7516SDavid Sterba * FIXME: this is too heavy to update just one value, ideally we'd like 1856444e7516SDavid Sterba * to use sysfs_update_group but some refactoring is needed first. 1857444e7516SDavid Sterba */ 1858444e7516SDavid Sterba sysfs_remove_group(fsid_kobj, &btrfs_feature_attr_group); 1859444e7516SDavid Sterba ret = sysfs_create_group(fsid_kobj, &btrfs_feature_attr_group); 1860444e7516SDavid Sterba } 1861444e7516SDavid Sterba 1862f5c29bd9SLiu Bo int __init btrfs_init_sysfs(void) 186358176a96SJosef Bacik { 1864079b72bcSJeff Mahoney int ret; 18651bae3098SDavid Sterba 1866e3fe4e71SGreg KH btrfs_kset = kset_create_and_add("btrfs", NULL, fs_kobj); 1867e3fe4e71SGreg KH if (!btrfs_kset) 1868e3fe4e71SGreg KH return -ENOMEM; 1869079b72bcSJeff Mahoney 18701bae3098SDavid Sterba init_feature_attrs(); 18711bae3098SDavid Sterba ret = sysfs_create_group(&btrfs_kset->kobj, &btrfs_feature_attr_group); 1872001a648dSFilipe Manana if (ret) 1873001a648dSFilipe Manana goto out2; 1874f902bd3aSMisono Tomohiro ret = sysfs_merge_group(&btrfs_kset->kobj, 1875f902bd3aSMisono Tomohiro &btrfs_static_feature_attr_group); 1876f902bd3aSMisono Tomohiro if (ret) 1877f902bd3aSMisono Tomohiro goto out_remove_group; 1878001a648dSFilipe Manana 18796e369febSDavid Sterba #ifdef CONFIG_BTRFS_DEBUG 18806e369febSDavid Sterba ret = sysfs_create_group(&btrfs_kset->kobj, &btrfs_debug_feature_attr_group); 18816e369febSDavid Sterba if (ret) 18826e369febSDavid Sterba goto out2; 18836e369febSDavid Sterba #endif 18846e369febSDavid Sterba 1885001a648dSFilipe Manana return 0; 1886f902bd3aSMisono Tomohiro 1887f902bd3aSMisono Tomohiro out_remove_group: 1888f902bd3aSMisono Tomohiro sysfs_remove_group(&btrfs_kset->kobj, &btrfs_feature_attr_group); 1889001a648dSFilipe Manana out2: 1890001a648dSFilipe Manana kset_unregister(btrfs_kset); 18911bae3098SDavid Sterba 18921bae3098SDavid Sterba return ret; 189358176a96SJosef Bacik } 189458176a96SJosef Bacik 1895e67c718bSDavid Sterba void __cold btrfs_exit_sysfs(void) 189658176a96SJosef Bacik { 1897f902bd3aSMisono Tomohiro sysfs_unmerge_group(&btrfs_kset->kobj, 1898f902bd3aSMisono Tomohiro &btrfs_static_feature_attr_group); 1899079b72bcSJeff Mahoney sysfs_remove_group(&btrfs_kset->kobj, &btrfs_feature_attr_group); 190071e8978eSDennis Zhou #ifdef CONFIG_BTRFS_DEBUG 190171e8978eSDennis Zhou sysfs_remove_group(&btrfs_kset->kobj, &btrfs_debug_feature_attr_group); 190271e8978eSDennis Zhou #endif 1903e3fe4e71SGreg KH kset_unregister(btrfs_kset); 190458176a96SJosef Bacik } 190555d47414SChris Mason 1906