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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef BTRFS_FS_H
#define BTRFS_FS_H
/*
* Runtime (in-memory) states of filesystem
*/
enum {
/* Global indicator of serious filesystem errors */
BTRFS_FS_STATE_ERROR,
/*
* Filesystem is being remounted, allow to skip some operations, like
* defrag
*/
BTRFS_FS_STATE_REMOUNTING,
/* Filesystem in RO mode */
BTRFS_FS_STATE_RO,
/* Track if a transaction abort has been reported on this filesystem */
BTRFS_FS_STATE_TRANS_ABORTED,
/*
* Bio operations should be blocked on this filesystem because a source
* or target device is being destroyed as part of a device replace
*/
BTRFS_FS_STATE_DEV_REPLACING,
/* The btrfs_fs_info created for self-tests */
BTRFS_FS_STATE_DUMMY_FS_INFO,
BTRFS_FS_STATE_NO_CSUMS,
/* Indicates there was an error cleaning up a log tree. */
BTRFS_FS_STATE_LOG_CLEANUP_ERROR,
BTRFS_FS_STATE_COUNT
};
enum {
BTRFS_FS_CLOSING_START,
BTRFS_FS_CLOSING_DONE,
BTRFS_FS_LOG_RECOVERING,
BTRFS_FS_OPEN,
BTRFS_FS_QUOTA_ENABLED,
BTRFS_FS_UPDATE_UUID_TREE_GEN,
BTRFS_FS_CREATING_FREE_SPACE_TREE,
BTRFS_FS_BTREE_ERR,
BTRFS_FS_LOG1_ERR,
BTRFS_FS_LOG2_ERR,
BTRFS_FS_QUOTA_OVERRIDE,
/* Used to record internally whether fs has been frozen */
BTRFS_FS_FROZEN,
/*
* Indicate that balance has been set up from the ioctl and is in the
* main phase. The fs_info::balance_ctl is initialized.
*/
BTRFS_FS_BALANCE_RUNNING,
/*
* Indicate that relocation of a chunk has started, it's set per chunk
* and is toggled between chunks.
*/
BTRFS_FS_RELOC_RUNNING,
/* Indicate that the cleaner thread is awake and doing something. */
BTRFS_FS_CLEANER_RUNNING,
/*
* The checksumming has an optimized version and is considered fast,
* so we don't need to offload checksums to workqueues.
*/
BTRFS_FS_CSUM_IMPL_FAST,
/* Indicate that the discard workqueue can service discards. */
BTRFS_FS_DISCARD_RUNNING,
/* Indicate that we need to cleanup space cache v1 */
BTRFS_FS_CLEANUP_SPACE_CACHE_V1,
/* Indicate that we can't trust the free space tree for caching yet */
BTRFS_FS_FREE_SPACE_TREE_UNTRUSTED,
/* Indicate whether there are any tree modification log users */
BTRFS_FS_TREE_MOD_LOG_USERS,
/* Indicate that we want the transaction kthread to commit right now. */
BTRFS_FS_COMMIT_TRANS,
/* Indicate we have half completed snapshot deletions pending. */
BTRFS_FS_UNFINISHED_DROPS,
/* Indicate we have to finish a zone to do next allocation. */
BTRFS_FS_NEED_ZONE_FINISH,
/* Indicate that we want to commit the transaction. */
BTRFS_FS_NEED_TRANS_COMMIT,
#if BITS_PER_LONG == 32
/* Indicate if we have error/warn message printed on 32bit systems */
BTRFS_FS_32BIT_ERROR,
BTRFS_FS_32BIT_WARN,
#endif
};
/*
* Flags for mount options.
*
* Note: don't forget to add new options to btrfs_show_options()
*/
enum {
BTRFS_MOUNT_NODATASUM = (1UL << 0),
BTRFS_MOUNT_NODATACOW = (1UL << 1),
BTRFS_MOUNT_NOBARRIER = (1UL << 2),
BTRFS_MOUNT_SSD = (1UL << 3),
BTRFS_MOUNT_DEGRADED = (1UL << 4),
BTRFS_MOUNT_COMPRESS = (1UL << 5),
BTRFS_MOUNT_NOTREELOG = (1UL << 6),
BTRFS_MOUNT_FLUSHONCOMMIT = (1UL << 7),
BTRFS_MOUNT_SSD_SPREAD = (1UL << 8),
BTRFS_MOUNT_NOSSD = (1UL << 9),
BTRFS_MOUNT_DISCARD_SYNC = (1UL << 10),
BTRFS_MOUNT_FORCE_COMPRESS = (1UL << 11),
BTRFS_MOUNT_SPACE_CACHE = (1UL << 12),
BTRFS_MOUNT_CLEAR_CACHE = (1UL << 13),
BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED = (1UL << 14),
BTRFS_MOUNT_ENOSPC_DEBUG = (1UL << 15),
BTRFS_MOUNT_AUTO_DEFRAG = (1UL << 16),
BTRFS_MOUNT_USEBACKUPROOT = (1UL << 17),
BTRFS_MOUNT_SKIP_BALANCE = (1UL << 18),
BTRFS_MOUNT_CHECK_INTEGRITY = (1UL << 19),
BTRFS_MOUNT_CHECK_INTEGRITY_DATA = (1UL << 20),
BTRFS_MOUNT_PANIC_ON_FATAL_ERROR = (1UL << 21),
BTRFS_MOUNT_RESCAN_UUID_TREE = (1UL << 22),
BTRFS_MOUNT_FRAGMENT_DATA = (1UL << 23),
BTRFS_MOUNT_FRAGMENT_METADATA = (1UL << 24),
BTRFS_MOUNT_FREE_SPACE_TREE = (1UL << 25),
BTRFS_MOUNT_NOLOGREPLAY = (1UL << 26),
BTRFS_MOUNT_REF_VERIFY = (1UL << 27),
BTRFS_MOUNT_DISCARD_ASYNC = (1UL << 28),
BTRFS_MOUNT_IGNOREBADROOTS = (1UL << 29),
BTRFS_MOUNT_IGNOREDATACSUMS = (1UL << 30),
BTRFS_MOUNT_NODISCARD = (1UL << 31),
};
#define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
#define BTRFS_DEFAULT_MAX_INLINE (2048)
/* Compatibility and incompatibility defines */
void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag,
const char *name);
void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag,
const char *name);
void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag,
const char *name);
void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag,
const char *name);
#define __btrfs_fs_incompat(fs_info, flags) \
(!!(btrfs_super_incompat_flags((fs_info)->super_copy) & (flags)))
#define __btrfs_fs_compat_ro(fs_info, flags) \
(!!(btrfs_super_compat_ro_flags((fs_info)->super_copy) & (flags)))
#define btrfs_set_fs_incompat(__fs_info, opt) \
__btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, #opt)
#define btrfs_clear_fs_incompat(__fs_info, opt) \
__btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, #opt)
#define btrfs_fs_incompat(fs_info, opt) \
__btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
#define btrfs_set_fs_compat_ro(__fs_info, opt) \
__btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, #opt)
#define btrfs_clear_fs_compat_ro(__fs_info, opt) \
__btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, #opt)
#define btrfs_fs_compat_ro(fs_info, opt) \
__btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
#define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
#define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
#define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
#define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
BTRFS_MOUNT_##opt)
#define btrfs_set_and_info(fs_info, opt, fmt, args...) \
do { \
if (!btrfs_test_opt(fs_info, opt)) \
btrfs_info(fs_info, fmt, ##args); \
btrfs_set_opt(fs_info->mount_opt, opt); \
} while (0)
#define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
do { \
if (btrfs_test_opt(fs_info, opt)) \
btrfs_info(fs_info, fmt, ##args); \
btrfs_clear_opt(fs_info->mount_opt, opt); \
} while (0)
static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
{
/* Do it this way so we only ever do one test_bit in the normal case. */
if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) {
if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags))
return 2;
return 1;
}
return 0;
}
/*
* If we remount the fs to be R/O or umount the fs, the cleaner needn't do
* anything except sleeping. This function is used to check the status of
* the fs.
* We check for BTRFS_FS_STATE_RO to avoid races with a concurrent remount,
* since setting and checking for SB_RDONLY in the superblock's flags is not
* atomic.
*/
static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info)
{
return test_bit(BTRFS_FS_STATE_RO, &fs_info->fs_state) ||
btrfs_fs_closing(fs_info);
}
static inline void btrfs_set_sb_rdonly(struct super_block *sb)
{
sb->s_flags |= SB_RDONLY;
set_bit(BTRFS_FS_STATE_RO, &btrfs_sb(sb)->fs_state);
}
static inline void btrfs_clear_sb_rdonly(struct super_block *sb)
{
sb->s_flags &= ~SB_RDONLY;
clear_bit(BTRFS_FS_STATE_RO, &btrfs_sb(sb)->fs_state);
}
static inline void btrfs_wake_unfinished_drop(struct btrfs_fs_info *fs_info)
{
clear_and_wake_up_bit(BTRFS_FS_UNFINISHED_DROPS, &fs_info->flags);
}
#define BTRFS_FS_ERROR(fs_info) (unlikely(test_bit(BTRFS_FS_STATE_ERROR, \
&(fs_info)->fs_state)))
#define BTRFS_FS_LOG_CLEANUP_ERROR(fs_info) \
(unlikely(test_bit(BTRFS_FS_STATE_LOG_CLEANUP_ERROR, \
&(fs_info)->fs_state)))
#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
{
return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
}
#else
static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
{
return 0;
}
#endif
#endif
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