diff options
Diffstat (limited to 'fs/btrfs/ctree.h')
| -rw-r--r-- | fs/btrfs/ctree.h | 3465 |
1 files changed, 29 insertions, 3436 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 9e6d48ff4597..6965703a81b6 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -28,12 +28,15 @@ #include <linux/refcount.h> #include <linux/crc32c.h> #include <linux/iomap.h> +#include <linux/fscrypt.h> #include "extent-io-tree.h" #include "extent_io.h" #include "extent_map.h" #include "async-thread.h" #include "block-rsv.h" #include "locking.h" +#include "misc.h" +#include "fs.h" struct btrfs_trans_handle; struct btrfs_transaction; @@ -41,10 +44,6 @@ struct btrfs_pending_snapshot; struct btrfs_delayed_ref_root; struct btrfs_space_info; struct btrfs_block_group; -extern struct kmem_cache *btrfs_trans_handle_cachep; -extern struct kmem_cache *btrfs_path_cachep; -extern struct kmem_cache *btrfs_free_space_cachep; -extern struct kmem_cache *btrfs_free_space_bitmap_cachep; struct btrfs_ordered_sum; struct btrfs_ref; struct btrfs_bio; @@ -55,340 +54,6 @@ struct btrfs_balance_control; struct btrfs_delayed_root; struct reloc_control; -#define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */ - -/* - * Maximum number of mirrors that can be available for all profiles counting - * the target device of dev-replace as one. During an active device replace - * procedure, the target device of the copy operation is a mirror for the - * filesystem data as well that can be used to read data in order to repair - * read errors on other disks. - * - * Current value is derived from RAID1C4 with 4 copies. - */ -#define BTRFS_MAX_MIRRORS (4 + 1) - -#define BTRFS_MAX_LEVEL 8 - -#define BTRFS_OLDEST_GENERATION 0ULL - -/* - * we can actually store much bigger names, but lets not confuse the rest - * of linux - */ -#define BTRFS_NAME_LEN 255 - -/* - * Theoretical limit is larger, but we keep this down to a sane - * value. That should limit greatly the possibility of collisions on - * inode ref items. - */ -#define BTRFS_LINK_MAX 65535U - -#define BTRFS_EMPTY_DIR_SIZE 0 - -/* ioprio of readahead is set to idle */ -#define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0)) - -#define BTRFS_DIRTY_METADATA_THRESH SZ_32M - -/* - * Use large batch size to reduce overhead of metadata updates. On the reader - * side, we only read it when we are close to ENOSPC and the read overhead is - * mostly related to the number of CPUs, so it is OK to use arbitrary large - * value here. - */ -#define BTRFS_TOTAL_BYTES_PINNED_BATCH SZ_128M - -#define BTRFS_MAX_EXTENT_SIZE SZ_128M - -/* - * Deltas are an effective way to populate global statistics. Give macro names - * to make it clear what we're doing. An example is discard_extents in - * btrfs_free_space_ctl. - */ -#define BTRFS_STAT_NR_ENTRIES 2 -#define BTRFS_STAT_CURR 0 -#define BTRFS_STAT_PREV 1 - -static inline unsigned long btrfs_chunk_item_size(int num_stripes) -{ - BUG_ON(num_stripes == 0); - return sizeof(struct btrfs_chunk) + - sizeof(struct btrfs_stripe) * (num_stripes - 1); -} - -/* - * 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 -}; - -#define BTRFS_BACKREF_REV_MAX 256 -#define BTRFS_BACKREF_REV_SHIFT 56 -#define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \ - BTRFS_BACKREF_REV_SHIFT) - -#define BTRFS_OLD_BACKREF_REV 0 -#define BTRFS_MIXED_BACKREF_REV 1 - -/* - * every tree block (leaf or node) starts with this header. - */ -struct btrfs_header { - /* these first four must match the super block */ - u8 csum[BTRFS_CSUM_SIZE]; - u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ - __le64 bytenr; /* which block this node is supposed to live in */ - __le64 flags; - - /* allowed to be different from the super from here on down */ - u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; - __le64 generation; - __le64 owner; - __le32 nritems; - u8 level; -} __attribute__ ((__packed__)); - -/* - * this is a very generous portion of the super block, giving us - * room to translate 14 chunks with 3 stripes each. - */ -#define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048 - -/* - * just in case we somehow lose the roots and are not able to mount, - * we store an array of the roots from previous transactions - * in the super. - */ -#define BTRFS_NUM_BACKUP_ROOTS 4 -struct btrfs_root_backup { - __le64 tree_root; - __le64 tree_root_gen; - - __le64 chunk_root; - __le64 chunk_root_gen; - - __le64 extent_root; - __le64 extent_root_gen; - - __le64 fs_root; - __le64 fs_root_gen; - - __le64 dev_root; - __le64 dev_root_gen; - - __le64 csum_root; - __le64 csum_root_gen; - - __le64 total_bytes; - __le64 bytes_used; - __le64 num_devices; - /* future */ - __le64 unused_64[4]; - - u8 tree_root_level; - u8 chunk_root_level; - u8 extent_root_level; - u8 fs_root_level; - u8 dev_root_level; - u8 csum_root_level; - /* future and to align */ - u8 unused_8[10]; -} __attribute__ ((__packed__)); - -#define BTRFS_SUPER_INFO_OFFSET SZ_64K -#define BTRFS_SUPER_INFO_SIZE 4096 - -/* - * The reserved space at the beginning of each device. - * It covers the primary super block and leaves space for potential use by other - * tools like bootloaders or to lower potential damage of accidental overwrite. - */ -#define BTRFS_DEVICE_RANGE_RESERVED (SZ_1M) - -/* - * the super block basically lists the main trees of the FS - * it currently lacks any block count etc etc - */ -struct btrfs_super_block { - /* the first 4 fields must match struct btrfs_header */ - u8 csum[BTRFS_CSUM_SIZE]; - /* FS specific UUID, visible to user */ - u8 fsid[BTRFS_FSID_SIZE]; - __le64 bytenr; /* this block number */ - __le64 flags; - - /* allowed to be different from the btrfs_header from here own down */ - __le64 magic; - __le64 generation; - __le64 root; - __le64 chunk_root; - __le64 log_root; - - /* - * This member has never been utilized since the very beginning, thus - * it's always 0 regardless of kernel version. We always use - * generation + 1 to read log tree root. So here we mark it deprecated. - */ - __le64 __unused_log_root_transid; - __le64 total_bytes; - __le64 bytes_used; - __le64 root_dir_objectid; - __le64 num_devices; - __le32 sectorsize; - __le32 nodesize; - __le32 __unused_leafsize; - __le32 stripesize; - __le32 sys_chunk_array_size; - __le64 chunk_root_generation; - __le64 compat_flags; - __le64 compat_ro_flags; - __le64 incompat_flags; - __le16 csum_type; - u8 root_level; - u8 chunk_root_level; - u8 log_root_level; - struct btrfs_dev_item dev_item; - - char label[BTRFS_LABEL_SIZE]; - - __le64 cache_generation; - __le64 uuid_tree_generation; - - /* the UUID written into btree blocks */ - u8 metadata_uuid[BTRFS_FSID_SIZE]; - - /* future expansion */ - u8 reserved8[8]; - __le64 reserved[27]; - u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; - struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS]; - - /* Padded to 4096 bytes */ - u8 padding[565]; -} __attribute__ ((__packed__)); -static_assert(sizeof(struct btrfs_super_block) == BTRFS_SUPER_INFO_SIZE); - -/* - * Compat flags that we support. If any incompat flags are set other than the - * ones specified below then we will fail to mount - */ -#define BTRFS_FEATURE_COMPAT_SUPP 0ULL -#define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL -#define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL - -#define BTRFS_FEATURE_COMPAT_RO_SUPP \ - (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \ - BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID | \ - BTRFS_FEATURE_COMPAT_RO_VERITY | \ - BTRFS_FEATURE_COMPAT_RO_BLOCK_GROUP_TREE) - -#define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL -#define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL - -#ifdef CONFIG_BTRFS_DEBUG -/* - * Extent tree v2 supported only with CONFIG_BTRFS_DEBUG - */ -#define BTRFS_FEATURE_INCOMPAT_SUPP \ - (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \ - BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \ - BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \ - BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \ - BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \ - BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \ - BTRFS_FEATURE_INCOMPAT_RAID56 | \ - BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \ - BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \ - BTRFS_FEATURE_INCOMPAT_NO_HOLES | \ - BTRFS_FEATURE_INCOMPAT_METADATA_UUID | \ - BTRFS_FEATURE_INCOMPAT_RAID1C34 | \ - BTRFS_FEATURE_INCOMPAT_ZONED | \ - BTRFS_FEATURE_INCOMPAT_EXTENT_TREE_V2) -#else -#define BTRFS_FEATURE_INCOMPAT_SUPP \ - (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \ - BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \ - BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \ - BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \ - BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \ - BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \ - BTRFS_FEATURE_INCOMPAT_RAID56 | \ - BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \ - BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \ - BTRFS_FEATURE_INCOMPAT_NO_HOLES | \ - BTRFS_FEATURE_INCOMPAT_METADATA_UUID | \ - BTRFS_FEATURE_INCOMPAT_RAID1C34 | \ - BTRFS_FEATURE_INCOMPAT_ZONED) -#endif - -#define BTRFS_FEATURE_INCOMPAT_SAFE_SET \ - (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF) -#define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL - -/* - * A leaf is full of items. offset and size tell us where to find - * the item in the leaf (relative to the start of the data area) - */ -struct btrfs_item { - struct btrfs_disk_key key; - __le32 offset; - __le32 size; -} __attribute__ ((__packed__)); - -/* - * leaves have an item area and a data area: - * [item0, item1....itemN] [free space] [dataN...data1, data0] - * - * The data is separate from the items to get the keys closer together - * during searches. - */ -struct btrfs_leaf { - struct btrfs_header header; - struct btrfs_item items[]; -} __attribute__ ((__packed__)); - -/* - * all non-leaf blocks are nodes, they hold only keys and pointers to - * other blocks - */ -struct btrfs_key_ptr { - struct btrfs_disk_key key; - __le64 blockptr; - __le64 generation; -} __attribute__ ((__packed__)); - -struct btrfs_node { - struct btrfs_header header; - struct btrfs_key_ptr ptrs[]; -} __attribute__ ((__packed__)); - /* Read ahead values for struct btrfs_path.reada */ enum { READA_NONE, @@ -447,712 +112,6 @@ struct btrfs_path { unsigned int nowait:1; }; -struct btrfs_dev_replace { - u64 replace_state; /* see #define above */ - time64_t time_started; /* seconds since 1-Jan-1970 */ - time64_t time_stopped; /* seconds since 1-Jan-1970 */ - atomic64_t num_write_errors; - atomic64_t num_uncorrectable_read_errors; - - u64 cursor_left; - u64 committed_cursor_left; - u64 cursor_left_last_write_of_item; - u64 cursor_right; - - u64 cont_reading_from_srcdev_mode; /* see #define above */ - - int is_valid; - int item_needs_writeback; - struct btrfs_device *srcdev; - struct btrfs_device *tgtdev; - - struct mutex lock_finishing_cancel_unmount; - struct rw_semaphore rwsem; - - struct btrfs_scrub_progress scrub_progress; - - struct percpu_counter bio_counter; - wait_queue_head_t replace_wait; -}; - -/* - * free clusters are used to claim free space in relatively large chunks, - * allowing us to do less seeky writes. They are used for all metadata - * allocations. In ssd_spread mode they are also used for data allocations. - */ -struct btrfs_free_cluster { - spinlock_t lock; - spinlock_t refill_lock; - struct rb_root root; - - /* largest extent in this cluster */ - u64 max_size; - - /* first extent starting offset */ - u64 window_start; - - /* We did a full search and couldn't create a cluster */ - bool fragmented; - - struct btrfs_block_group *block_group; - /* - * when a cluster is allocated from a block group, we put the - * cluster onto a list in the block group so that it can - * be freed before the block group is freed. - */ - struct list_head block_group_list; -}; - -/* Discard control. */ -/* - * Async discard uses multiple lists to differentiate the discard filter - * parameters. Index 0 is for completely free block groups where we need to - * ensure the entire block group is trimmed without being lossy. Indices - * afterwards represent monotonically decreasing discard filter sizes to - * prioritize what should be discarded next. - */ -#define BTRFS_NR_DISCARD_LISTS 3 -#define BTRFS_DISCARD_INDEX_UNUSED 0 -#define BTRFS_DISCARD_INDEX_START 1 - -struct btrfs_discard_ctl { - struct workqueue_struct *discard_workers; - struct delayed_work work; - spinlock_t lock; - struct btrfs_block_group *block_group; - struct list_head discard_list[BTRFS_NR_DISCARD_LISTS]; - u64 prev_discard; - u64 prev_discard_time; - atomic_t discardable_extents; - atomic64_t discardable_bytes; - u64 max_discard_size; - u64 delay_ms; - u32 iops_limit; - u32 kbps_limit; - u64 discard_extent_bytes; - u64 discard_bitmap_bytes; - atomic64_t discard_bytes_saved; -}; - -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, - -#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 -}; - -/* - * Exclusive operations (device replace, resize, device add/remove, balance) - */ -enum btrfs_exclusive_operation { - BTRFS_EXCLOP_NONE, - BTRFS_EXCLOP_BALANCE_PAUSED, - BTRFS_EXCLOP_BALANCE, - BTRFS_EXCLOP_DEV_ADD, - BTRFS_EXCLOP_DEV_REMOVE, - BTRFS_EXCLOP_DEV_REPLACE, - BTRFS_EXCLOP_RESIZE, - BTRFS_EXCLOP_SWAP_ACTIVATE, -}; - -/* Store data about transaction commits, exported via sysfs. */ -struct btrfs_commit_stats { - /* Total number of commits */ - u64 commit_count; - /* The maximum commit duration so far in ns */ - u64 max_commit_dur; - /* The last commit duration in ns */ - u64 last_commit_dur; - /* The total commit duration in ns */ - u64 total_commit_dur; -}; - -struct btrfs_fs_info { - u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; - unsigned long flags; - struct btrfs_root *tree_root; - struct btrfs_root *chunk_root; - struct btrfs_root *dev_root; - struct btrfs_root *fs_root; - struct btrfs_root *quota_root; - struct btrfs_root *uuid_root; - struct btrfs_root *data_reloc_root; - struct btrfs_root *block_group_root; - - /* the log root tree is a directory of all the other log roots */ - struct btrfs_root *log_root_tree; - - /* The tree that holds the global roots (csum, extent, etc) */ - rwlock_t global_root_lock; - struct rb_root global_root_tree; - - spinlock_t fs_roots_radix_lock; - struct radix_tree_root fs_roots_radix; - - /* block group cache stuff */ - rwlock_t block_group_cache_lock; - struct rb_root_cached block_group_cache_tree; - - /* keep track of unallocated space */ - atomic64_t free_chunk_space; - - /* Track ranges which are used by log trees blocks/logged data extents */ - struct extent_io_tree excluded_extents; - - /* logical->physical extent mapping */ - struct extent_map_tree mapping_tree; - - /* - * block reservation for extent, checksum, root tree and - * delayed dir index item - */ - struct btrfs_block_rsv global_block_rsv; - /* block reservation for metadata operations */ - struct btrfs_block_rsv trans_block_rsv; - /* block reservation for chunk tree */ - struct btrfs_block_rsv chunk_block_rsv; - /* block reservation for delayed operations */ - struct btrfs_block_rsv delayed_block_rsv; - /* block reservation for delayed refs */ - struct btrfs_block_rsv delayed_refs_rsv; - - struct btrfs_block_rsv empty_block_rsv; - - u64 generation; - u64 last_trans_committed; - /* - * Generation of the last transaction used for block group relocation - * since the filesystem was last mounted (or 0 if none happened yet). - * Must be written and read while holding btrfs_fs_info::commit_root_sem. - */ - u64 last_reloc_trans; - u64 avg_delayed_ref_runtime; - - /* - * this is updated to the current trans every time a full commit - * is required instead of the faster short fsync log commits - */ - u64 last_trans_log_full_commit; - unsigned long mount_opt; - /* - * Track requests for actions that need to be done during transaction - * commit (like for some mount options). - */ - unsigned long pending_changes; - unsigned long compress_type:4; - unsigned int compress_level; - u32 commit_interval; - /* - * It is a suggestive number, the read side is safe even it gets a - * wrong number because we will write out the data into a regular - * extent. The write side(mount/remount) is under ->s_umount lock, - * so it is also safe. - */ - u64 max_inline; - - struct btrfs_transaction *running_transaction; - wait_queue_head_t transaction_throttle; - wait_queue_head_t transaction_wait; - wait_queue_head_t transaction_blocked_wait; - wait_queue_head_t async_submit_wait; - - /* - * Used to protect the incompat_flags, compat_flags, compat_ro_flags - * when they are updated. - * - * Because we do not clear the flags for ever, so we needn't use - * the lock on the read side. - * - * We also needn't use the lock when we mount the fs, because - * there is no other task which will update the flag. - */ - spinlock_t super_lock; - struct btrfs_super_block *super_copy; - struct btrfs_super_block *super_for_commit; - struct super_block *sb; - struct inode *btree_inode; - struct mutex tree_log_mutex; - struct mutex transaction_kthread_mutex; - struct mutex cleaner_mutex; - struct mutex chunk_mutex; - - /* - * this is taken to make sure we don't set block groups ro after - * the free space cache has been allocated on them - */ - struct mutex ro_block_group_mutex; - - /* this is used during read/modify/write to make sure - * no two ios are trying to mod the same stripe at the same - * time - */ - struct btrfs_stripe_hash_table *stripe_hash_table; - - /* - * this protects the ordered operations list only while we are - * processing all of the entries on it. This way we make - * sure the commit code doesn't find the list temporarily empty - * because another function happens to be doing non-waiting preflush - * before jumping into the main commit. - */ - struct mutex ordered_operations_mutex; - - struct rw_semaphore commit_root_sem; - - struct rw_semaphore cleanup_work_sem; - - struct rw_semaphore subvol_sem; - - spinlock_t trans_lock; - /* - * the reloc mutex goes with the trans lock, it is taken - * during commit to protect us from the relocation code - */ - struct mutex reloc_mutex; - - struct list_head trans_list; - struct list_head dead_roots; - struct list_head caching_block_groups; - - spinlock_t delayed_iput_lock; - struct list_head delayed_iputs; - atomic_t nr_delayed_iputs; - wait_queue_head_t delayed_iputs_wait; - - atomic64_t tree_mod_seq; - - /* this protects tree_mod_log and tree_mod_seq_list */ - rwlock_t tree_mod_log_lock; - struct rb_root tree_mod_log; - struct list_head tree_mod_seq_list; - - atomic_t async_delalloc_pages; - - /* - * this is used to protect the following list -- ordered_roots. - */ - spinlock_t ordered_root_lock; - - /* - * all fs/file tree roots in which there are data=ordered extents - * pending writeback are added into this list. - * - * these can span multiple transactions and basically include - * every dirty data page that isn't from nodatacow - */ - struct list_head ordered_roots; - - struct mutex delalloc_root_mutex; - spinlock_t delalloc_root_lock; - /* all fs/file tree roots that have delalloc inodes. */ - struct list_head delalloc_roots; - - /* - * there is a pool of worker threads for checksumming during writes - * and a pool for checksumming after reads. This is because readers - * can run with FS locks held, and the writers may be waiting for - * those locks. We don't want ordering in the pending list to cause - * deadlocks, and so the two are serviced separately. - * - * A third pool does submit_bio to avoid deadlocking with the other - * two - */ - struct btrfs_workqueue *workers; - struct btrfs_workqueue *hipri_workers; - struct btrfs_workqueue *delalloc_workers; - struct btrfs_workqueue *flush_workers; - struct workqueue_struct *endio_workers; - struct workqueue_struct *endio_meta_workers; - struct workqueue_struct *endio_raid56_workers; - struct workqueue_struct *rmw_workers; - struct workqueue_struct *compressed_write_workers; - struct btrfs_workqueue *endio_write_workers; - struct btrfs_workqueue *endio_freespace_worker; - struct btrfs_workqueue *caching_workers; - - /* - * fixup workers take dirty pages that didn't properly go through - * the cow mechanism and make them safe to write. It happens - * for the sys_munmap function call path - */ - struct btrfs_workqueue *fixup_workers; - struct btrfs_workqueue *delayed_workers; - - struct task_struct *transaction_kthread; - struct task_struct *cleaner_kthread; - u32 thread_pool_size; - - struct kobject *space_info_kobj; - struct kobject *qgroups_kobj; - struct kobject *discard_kobj; - - /* used to keep from writing metadata until there is a nice batch */ - struct percpu_counter dirty_metadata_bytes; - struct percpu_counter delalloc_bytes; - struct percpu_counter ordered_bytes; - s32 dirty_metadata_batch; - s32 delalloc_batch; - - struct list_head dirty_cowonly_roots; - - struct btrfs_fs_devices *fs_devices; - - /* - * The space_info list is effectively read only after initial - * setup. It is populated at mount time and cleaned up after - * all block groups are removed. RCU is used to protect it. - */ - struct list_head space_info; - - struct btrfs_space_info *data_sinfo; - - struct reloc_control *reloc_ctl; - - /* data_alloc_cluster is only used in ssd_spread mode */ - struct btrfs_free_cluster data_alloc_cluster; - - /* all metadata allocations go through this cluster */ - struct btrfs_free_cluster meta_alloc_cluster; - - /* auto defrag inodes go here */ - spinlock_t defrag_inodes_lock; - struct rb_root defrag_inodes; - atomic_t defrag_running; - - /* Used to protect avail_{data, metadata, system}_alloc_bits */ - seqlock_t profiles_lock; - /* - * these three are in extended format (availability of single - * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other - * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits) - */ - u64 avail_data_alloc_bits; - u64 avail_metadata_alloc_bits; - u64 avail_system_alloc_bits; - - /* restriper state */ - spinlock_t balance_lock; - struct mutex balance_mutex; - atomic_t balance_pause_req; - atomic_t balance_cancel_req; - struct btrfs_balance_control *balance_ctl; - wait_queue_head_t balance_wait_q; - - /* Cancellation requests for chunk relocation */ - atomic_t reloc_cancel_req; - - u32 data_chunk_allocations; - u32 metadata_ratio; - - void *bdev_holder; - - /* private scrub information */ - struct mutex scrub_lock; - atomic_t scrubs_running; - atomic_t scrub_pause_req; - atomic_t scrubs_paused; - atomic_t scrub_cancel_req; - wait_queue_head_t scrub_pause_wait; - /* - * The worker pointers are NULL iff the refcount is 0, ie. scrub is not - * running. - */ - refcount_t scrub_workers_refcnt; - struct workqueue_struct *scrub_workers; - struct workqueue_struct *scrub_wr_completion_workers; - struct workqueue_struct *scrub_parity_workers; - struct btrfs_subpage_info *subpage_info; - - struct btrfs_discard_ctl discard_ctl; - -#ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY - u32 check_integrity_print_mask; -#endif - /* is qgroup tracking in a consistent state? */ - u64 qgroup_flags; - - /* holds configuration and tracking. Protected by qgroup_lock */ - struct rb_root qgroup_tree; - spinlock_t qgroup_lock; - - /* - * used to avoid frequently calling ulist_alloc()/ulist_free() - * when doing qgroup accounting, it must be protected by qgroup_lock. - */ - struct ulist *qgroup_ulist; - - /* - * Protect user change for quota operations. If a transaction is needed, - * it must be started before locking this lock. - */ - struct mutex qgroup_ioctl_lock; - - /* list of dirty qgroups to be written at next commit */ - struct list_head dirty_qgroups; - - /* used by qgroup for an efficient tree traversal */ - u64 qgroup_seq; - - /* qgroup rescan items */ - struct mutex qgroup_rescan_lock; /* protects the progress item */ - struct btrfs_key qgroup_rescan_progress; - struct btrfs_workqueue *qgroup_rescan_workers; - struct completion qgroup_rescan_completion; - struct btrfs_work qgroup_rescan_work; - bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */ - u8 qgroup_drop_subtree_thres; - - /* filesystem state */ - unsigned long fs_state; - - struct btrfs_delayed_root *delayed_root; - - /* Extent buffer radix tree */ - spinlock_t buffer_lock; - /* Entries are eb->start / sectorsize */ - struct radix_tree_root buffer_radix; - - /* next backup root to be overwritten */ - int backup_root_index; - - /* device replace state */ - struct btrfs_dev_replace dev_replace; - - struct semaphore uuid_tree_rescan_sem; - - /* Used to reclaim the metadata space in the background. */ - struct work_struct async_reclaim_work; - struct work_struct async_data_reclaim_work; - struct work_struct preempt_reclaim_work; - - /* Reclaim partially filled block groups in the background */ - struct work_struct reclaim_bgs_work; - struct list_head reclaim_bgs; - int bg_reclaim_threshold; - - spinlock_t unused_bgs_lock; - struct list_head unused_bgs; - struct mutex unused_bg_unpin_mutex; - /* Protect block groups that are going to be deleted */ - struct mutex reclaim_bgs_lock; - - /* Cached block sizes */ - u32 nodesize; - u32 sectorsize; - /* ilog2 of sectorsize, use to avoid 64bit division */ - u32 sectorsize_bits; - u32 csum_size; - u32 csums_per_leaf; - u32 stripesize; - - /* - * Maximum size of an extent. BTRFS_MAX_EXTENT_SIZE on regular - * filesystem, on zoned it depends on the device constraints. - */ - u64 max_extent_size; - - /* Block groups and devices containing active swapfiles. */ - spinlock_t swapfile_pins_lock; - struct rb_root swapfile_pins; - - struct crypto_shash *csum_shash; - - /* Type of exclusive operation running, protected by super_lock */ - enum btrfs_exclusive_operation exclusive_operation; - - /* - * Zone size > 0 when in ZONED mode, otherwise it's used for a check - * if the mode is enabled - */ - u64 zone_size; - - /* Max size to emit ZONE_APPEND write command */ - u64 max_zone_append_size; - struct mutex zoned_meta_io_lock; - spinlock_t treelog_bg_lock; - u64 treelog_bg; - - /* - * Start of the dedicated data relocation block group, protected by - * relocation_bg_lock. - */ - spinlock_t relocation_bg_lock; - u64 data_reloc_bg; - struct mutex zoned_data_reloc_io_lock; - - u64 nr_global_roots; - - spinlock_t zone_active_bgs_lock; - struct list_head zone_active_bgs; - - /* Updates are not protected by any lock */ - struct btrfs_commit_stats commit_stats; - - /* - * Last generation where we dropped a non-relocation root. - * Use btrfs_set_last_root_drop_gen() and btrfs_get_last_root_drop_gen() - * to change it and to read it, respectively. - */ - u64 last_root_drop_gen; - - /* - * Annotations for transaction events (structures are empty when - * compiled without lockdep). - */ - struct lockdep_map btrfs_trans_num_writers_map; - struct lockdep_map btrfs_trans_num_extwriters_map; - struct lockdep_map btrfs_state_change_map[4]; - struct lockdep_map btrfs_trans_pending_ordered_map; - struct lockdep_map btrfs_ordered_extent_map; - -#ifdef CONFIG_BTRFS_FS_REF_VERIFY - spinlock_t ref_verify_lock; - struct rb_root block_tree; -#endif - -#ifdef CONFIG_BTRFS_DEBUG - struct kobject *debug_kobj; - struct list_head allocated_roots; - - spinlock_t eb_leak_lock; - struct list_head allocated_ebs; -#endif -}; - -static inline void btrfs_set_last_root_drop_gen(struct btrfs_fs_info *fs_info, - u64 gen) -{ - WRITE_ONCE(fs_info->last_root_drop_gen, gen); -} - -static inline u64 btrfs_get_last_root_drop_gen(const struct btrfs_fs_info *fs_info) -{ - return READ_ONCE(fs_info->last_root_drop_gen); -} - -static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb) -{ - return sb->s_fs_info; -} - -/* - * Take the number of bytes to be checksummed and figure out how many leaves - * it would require to store the csums for that many bytes. - */ -static inline u64 btrfs_csum_bytes_to_leaves( - const struct btrfs_fs_info *fs_info, u64 csum_bytes) -{ - const u64 num_csums = csum_bytes >> fs_info->sectorsize_bits; - - return DIV_ROUND_UP_ULL(num_csums, fs_info->csums_per_leaf); -} - -/* - * Use this if we would be adding new items, as we could split nodes as we cow - * down the tree. - */ -static inline u64 btrfs_calc_insert_metadata_size(struct btrfs_fs_info *fs_info, - unsigned num_items) -{ - return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items; -} - -/* - * Doing a truncate or a modification won't result in new nodes or leaves, just - * what we need for COW. - */ -static inline u64 btrfs_calc_metadata_size(struct btrfs_fs_info *fs_info, - unsigned num_items) -{ - return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items; -} - -#define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \ - sizeof(struct btrfs_item)) - -static inline bool btrfs_is_zoned(const struct btrfs_fs_info *fs_info) -{ - return fs_info->zone_size > 0; -} - -/* - * Count how many fs_info->max_extent_size cover the @size - */ -static inline u32 count_max_extents(struct btrfs_fs_info *fs_info, u64 size) -{ -#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS - if (!fs_info) - return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE); -#endif - - return div_u64(size + fs_info->max_extent_size - 1, fs_info->max_extent_size); -} - -bool btrfs_exclop_start(struct btrfs_fs_info *fs_info, - enum btrfs_exclusive_operation type); -bool btrfs_exclop_start_try_lock(struct btrfs_fs_info *fs_info, - enum btrfs_exclusive_operation type); -void btrfs_exclop_start_unlock(struct btrfs_fs_info *fs_info); -void btrfs_exclop_finish(struct btrfs_fs_info *fs_info); -void btrfs_exclop_balance(struct btrfs_fs_info *fs_info, - enum btrfs_exclusive_operation op); - /* * The state of btrfs root */ @@ -1215,87 +174,6 @@ enum { BTRFS_ROOT_RESET_LOCKDEP_CLASS, }; -enum btrfs_lockdep_trans_states { - BTRFS_LOCKDEP_TRANS_COMMIT_START, - BTRFS_LOCKDEP_TRANS_UNBLOCKED, - BTRFS_LOCKDEP_TRANS_SUPER_COMMITTED, - BTRFS_LOCKDEP_TRANS_COMPLETED, -}; - -/* - * Lockdep annotation for wait events. - * - * @owner: The struct where the lockdep map is defined - * @lock: The lockdep map corresponding to a wait event - * - * This macro is used to annotate a wait event. In this case a thread acquires - * the lockdep map as writer (exclusive lock) because it has to block until all - * the threads that hold the lock as readers signal the condition for the wait - * event and release their locks. - */ -#define btrfs_might_wait_for_event(owner, lock) \ - do { \ - rwsem_acquire(&owner->lock##_map, 0, 0, _THIS_IP_); \ - rwsem_release(&owner->lock##_map, _THIS_IP_); \ - } while (0) - -/* - * Protection for the resource/condition of a wait event. - * - * @owner: The struct where the lockdep map is defined - * @lock: The lockdep map corresponding to a wait event - * - * Many threads can modify the condition for the wait event at the same time - * and signal the threads that block on the wait event. The threads that modify - * the condition and do the signaling acquire the lock as readers (shared - * lock). - */ -#define btrfs_lockdep_acquire(owner, lock) \ - rwsem_acquire_read(&owner->lock##_map, 0, 0, _THIS_IP_) - -/* - * Used after signaling the condition for a wait event to release the lockdep - * map held by a reader thread. - */ -#define btrfs_lockdep_release(owner, lock) \ - rwsem_release(&owner->lock##_map, _THIS_IP_) - -/* - * Macros for the transaction states wait events, similar to the generic wait - * event macros. - */ -#define btrfs_might_wait_for_state(owner, i) \ - do { \ - rwsem_acquire(&owner->btrfs_state_change_map[i], 0, 0, _THIS_IP_); \ - rwsem_release(&owner->btrfs_state_change_map[i], _THIS_IP_); \ - } while (0) - -#define btrfs_trans_state_lockdep_acquire(owner, i) \ - rwsem_acquire_read(&owner->btrfs_state_change_map[i], 0, 0, _THIS_IP_) - -#define btrfs_trans_state_lockdep_release(owner, i) \ - rwsem_release(&owner->btrfs_state_change_map[i], _THIS_IP_) - -/* Initialization of the lockdep map */ -#define btrfs_lockdep_init_map(owner, lock) \ - do { \ - static struct lock_class_key lock##_key; \ - lockdep_init_map(&owner->lock##_map, #lock, &lock##_key, 0); \ - } while (0) - -/* Initialization of the transaction states lockdep maps. */ -#define btrfs_state_lockdep_init_map(owner, lock, state) \ - do { \ - static struct lock_class_key lock##_key; \ - lockdep_init_map(&owner->btrfs_state_change_map[state], #lock, \ - &lock##_key, 0); \ - } while (0) - -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); -} - /* * Record swapped tree blocks of a subvolume tree for delayed subtree trace * code. For detail check comment in fs/btrfs/qgroup.c. @@ -1457,6 +335,23 @@ struct btrfs_root { #endif }; +static inline bool btrfs_root_readonly(const struct btrfs_root *root) +{ + /* Byte-swap the constant at compile time, root_item::flags is LE */ + return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0; +} + +static inline bool btrfs_root_dead(const struct btrfs_root *root) +{ + /* Byte-swap the constant at compile time, root_item::flags is LE */ + return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0; +} + +static inline u64 btrfs_root_id(const struct btrfs_root *root) +{ + return root->root_key.objectid; +} + /* * Structure that conveys information about an extent that is going to replace * all the extents in a file range. @@ -1548,17 +443,14 @@ struct btrfs_drop_extents_args { struct btrfs_file_private { void *filldir_buf; + struct extent_state *llseek_cached_state; }; - static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info) { - return info->nodesize - sizeof(struct btrfs_header); } -#define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items) - static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info) { return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item); @@ -1569,1254 +461,14 @@ static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info) return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr); } -#define BTRFS_FILE_EXTENT_INLINE_DATA_START \ - (offsetof(struct btrfs_file_extent_item, disk_bytenr)) -static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info) -{ - return BTRFS_MAX_ITEM_SIZE(info) - - BTRFS_FILE_EXTENT_INLINE_DATA_START; -} - static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info) { return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item); } -/* - * 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), -}; - -#define BTRFS_DEFAULT_COMMIT_INTERVAL (30) -#define BTRFS_DEFAULT_MAX_INLINE (2048) - -#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) - -/* - * Requests for changes that need to be done during transaction commit. - * - * Internal mount options that are used for special handling of the real - * mount options (eg. cannot be set during remount and have to be set during - * transaction commit) - */ - -#define BTRFS_PENDING_COMMIT (0) - -#define btrfs_test_pending(info, opt) \ - test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) -#define btrfs_set_pending(info, opt) \ - set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) -#define btrfs_clear_pending(info, opt) \ - clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) - -/* - * Helpers for setting pending mount option changes. - * - * Expects corresponding macros - * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name - */ -#define btrfs_set_pending_and_info(info, opt, fmt, args...) \ -do { \ - if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \ - btrfs_info((info), fmt, ##args); \ - btrfs_set_pending((info), SET_##opt); \ - btrfs_clear_pending((info), CLEAR_##opt); \ - } \ -} while(0) - -#define btrfs_clear_pending_and_info(info, opt, fmt, args...) \ -do { \ - if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \ - btrfs_info((info), fmt, ##args); \ - btrfs_set_pending((info), CLEAR_##opt); \ - btrfs_clear_pending((info), SET_##opt); \ - } \ -} while(0) - -/* - * Inode flags - */ -#define BTRFS_INODE_NODATASUM (1U << 0) -#define BTRFS_INODE_NODATACOW (1U << 1) -#define BTRFS_INODE_READONLY (1U << 2) -#define BTRFS_INODE_NOCOMPRESS (1U << 3) -#define BTRFS_INODE_PREALLOC (1U << 4) -#define BTRFS_INODE_SYNC (1U << 5) -#define BTRFS_INODE_IMMUTABLE (1U << 6) -#define BTRFS_INODE_APPEND (1U << 7) -#define BTRFS_INODE_NODUMP (1U << 8) -#define BTRFS_INODE_NOATIME (1U << 9) -#define BTRFS_INODE_DIRSYNC (1U << 10) -#define BTRFS_INODE_COMPRESS (1U << 11) - -#define BTRFS_INODE_ROOT_ITEM_INIT (1U << 31) - -#define BTRFS_INODE_FLAG_MASK \ - (BTRFS_INODE_NODATASUM | \ - BTRFS_INODE_NODATACOW | \ - BTRFS_INODE_READONLY | \ - BTRFS_INODE_NOCOMPRESS | \ - BTRFS_INODE_PREALLOC | \ - BTRFS_INODE_SYNC | \ - BTRFS_INODE_IMMUTABLE | \ - BTRFS_INODE_APPEND | \ - BTRFS_INODE_NODUMP | \ - BTRFS_INODE_NOATIME | \ - BTRFS_INODE_DIRSYNC | \ - BTRFS_INODE_COMPRESS | \ - BTRFS_INODE_ROOT_ITEM_INIT) - -#define BTRFS_INODE_RO_VERITY (1U << 0) - -#define BTRFS_INODE_RO_FLAG_MASK (BTRFS_INODE_RO_VERITY) - -struct btrfs_map_token { - struct extent_buffer *eb; - char *kaddr; - unsigned long offset; -}; - #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \ ((bytes) >> (fs_info)->sectorsize_bits) -static inline void btrfs_init_map_token(struct btrfs_map_token *token, - struct extent_buffer *eb) -{ - token->eb = eb; - token->kaddr = page_address(eb->pages[0]); - token->offset = 0; -} - -/* some macros to generate set/get functions for the struct fields. This - * assumes there is a lefoo_to_cpu for every type, so lets make a simple - * one for u8: - */ -#define le8_to_cpu(v) (v) -#define cpu_to_le8(v) (v) -#define __le8 u8 - -static inline u8 get_unaligned_le8(const void *p) -{ - return *(u8 *)p; -} - -static inline void put_unaligned_le8(u8 val, void *p) -{ - *(u8 *)p = val; -} - -#define read_eb_member(eb, ptr, type, member, result) (\ - read_extent_buffer(eb, (char *)(result), \ - ((unsigned long)(ptr)) + \ - offsetof(type, member), \ - sizeof(((type *)0)->member))) - -#define write_eb_member(eb, ptr, type, member, result) (\ - write_extent_buffer(eb, (char *)(result), \ - ((unsigned long)(ptr)) + \ - offsetof(type, member), \ - sizeof(((type *)0)->member))) - -#define DECLARE_BTRFS_SETGET_BITS(bits) \ -u##bits btrfs_get_token_##bits(struct btrfs_map_token *token, \ - const void *ptr, unsigned long off); \ -void btrfs_set_token_##bits(struct btrfs_map_token *token, \ - const void *ptr, unsigned long off, \ - u##bits val); \ -u##bits btrfs_get_##bits(const struct extent_buffer *eb, \ - const void *ptr, unsigned long off); \ -void btrfs_set_##bits(const struct extent_buffer *eb, void *ptr, \ - unsigned long off, u##bits val); - -DECLARE_BTRFS_SETGET_BITS(8) -DECLARE_BTRFS_SETGET_BITS(16) -DECLARE_BTRFS_SETGET_BITS(32) -DECLARE_BTRFS_SETGET_BITS(64) - -#define BTRFS_SETGET_FUNCS(name, type, member, bits) \ -static inline u##bits btrfs_##name(const struct extent_buffer *eb, \ - const type *s) \ -{ \ - static_assert(sizeof(u##bits) == sizeof(((type *)0))->member); \ - return btrfs_get_##bits(eb, s, offsetof(type, member)); \ -} \ -static inline void btrfs_set_##name(const struct extent_buffer *eb, type *s, \ - u##bits val) \ -{ \ - static_assert(sizeof(u##bits) == sizeof(((type *)0))->member); \ - btrfs_set_##bits(eb, s, offsetof(type, member), val); \ -} \ -static inline u##bits btrfs_token_##name(struct btrfs_map_token *token, \ - const type *s) \ -{ \ - static_assert(sizeof(u##bits) == sizeof(((type *)0))->member); \ - return btrfs_get_token_##bits(token, s, offsetof(type, member));\ -} \ -static inline void btrfs_set_token_##name(struct btrfs_map_token *token,\ - type *s, u##bits val) \ -{ \ - static_assert(sizeof(u##bits) == sizeof(((type *)0))->member); \ - btrfs_set_token_##bits(token, s, offsetof(type, member), val); \ -} - -#define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ -static inline u##bits btrfs_##name(const struct extent_buffer *eb) \ -{ \ - const type *p = page_address(eb->pages[0]) + \ - offset_in_page(eb->start); \ - return get_unaligned_le##bits(&p->member); \ -} \ -static inline void btrfs_set_##name(const struct extent_buffer *eb, \ - u##bits val) \ -{ \ - type *p = page_address(eb->pages[0]) + offset_in_page(eb->start); \ - put_unaligned_le##bits(val, &p->member); \ -} - -#define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ -static inline u##bits btrfs_##name(const type *s) \ -{ \ - return get_unaligned_le##bits(&s->member); \ -} \ -static inline void btrfs_set_##name(type *s, u##bits val) \ -{ \ - put_unaligned_le##bits(val, &s->member); \ -} - -static inline u64 btrfs_device_total_bytes(const struct extent_buffer *eb, - struct btrfs_dev_item *s) -{ - static_assert(sizeof(u64) == - sizeof(((struct btrfs_dev_item *)0))->total_bytes); - return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item, - total_bytes)); -} -static inline void btrfs_set_device_total_bytes(const struct extent_buffer *eb, - struct btrfs_dev_item *s, - u64 val) -{ - static_assert(sizeof(u64) == - sizeof(((struct btrfs_dev_item *)0))->total_bytes); - WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize)); - btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val); -} - - -BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); -BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); -BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); -BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); -BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, - start_offset, 64); -BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); -BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); -BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); -BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); -BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); -BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64); - -BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); -BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, - total_bytes, 64); -BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, - bytes_used, 64); -BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, - io_align, 32); -BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, - io_width, 32); -BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, - sector_size, 32); -BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); -BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, - dev_group, 32); -BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, - seek_speed, 8); -BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, - bandwidth, 8); -BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item, - generation, 64); - -static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d) -{ - return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid); -} - -static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d) -{ - return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid); -} - -BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); -BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); -BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); -BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); -BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); -BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); -BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); -BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); -BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); -BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); -BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); - -static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) -{ - return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); -} - -BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); -BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); -BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, - stripe_len, 64); -BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, - io_align, 32); -BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, - io_width, 32); -BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, - sector_size, 32); -BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); -BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, - num_stripes, 16); -BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, - sub_stripes, 16); -BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); -BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); - -static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, - int nr) -{ - unsigned long offset = (unsigned long)c; - offset += offsetof(struct btrfs_chunk, stripe); - offset += nr * sizeof(struct btrfs_stripe); - return (struct btrfs_stripe *)offset; -} - -static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) -{ - return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); -} - -static inline u64 btrfs_stripe_offset_nr(const struct extent_buffer *eb, - struct btrfs_chunk *c, int nr) -{ - return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); -} - -static inline u64 btrfs_stripe_devid_nr(const struct extent_buffer *eb, - struct btrfs_chunk *c, int nr) -{ - return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); -} - -/* struct btrfs_block_group_item */ -BTRFS_SETGET_STACK_FUNCS(stack_block_group_used, struct btrfs_block_group_item, - used, 64); -BTRFS_SETGET_FUNCS(block_group_used, struct btrfs_block_group_item, - used, 64); -BTRFS_SETGET_STACK_FUNCS(stack_block_group_chunk_objectid, - struct btrfs_block_group_item, chunk_objectid, 64); - -BTRFS_SETGET_FUNCS(block_group_chunk_objectid, - struct btrfs_block_group_item, chunk_objectid, 64); -BTRFS_SETGET_FUNCS(block_group_flags, - struct btrfs_block_group_item, flags, 64); -BTRFS_SETGET_STACK_FUNCS(stack_block_group_flags, - struct btrfs_block_group_item, flags, 64); - -/* struct btrfs_free_space_info */ -BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info, - extent_count, 32); -BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32); - -/* struct btrfs_inode_ref */ -BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); -BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); - -/* struct btrfs_inode_extref */ -BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref, - parent_objectid, 64); -BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref, - name_len, 16); -BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64); - -/* struct btrfs_inode_item */ -BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); -BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); -BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64); -BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); -BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64); -BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); -BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); -BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); -BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); -BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); -BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); -BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64); -BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item, - generation, 64); -BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item, - sequence, 64); -BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item, - transid, 64); -BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64); -BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item, - nbytes, 64); -BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item, - block_group, 64); -BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32); -BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32); -BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32); -BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32); -BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64); -BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64); -BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); -BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); -BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64); -BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32); - -/* struct btrfs_dev_extent */ -BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, - chunk_tree, 64); -BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, - chunk_objectid, 64); -BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, - chunk_offset, 64); -BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); -BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64); -BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item, - generation, 64); -BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64); - -BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8); - -static inline void btrfs_tree_block_key(const struct extent_buffer *eb, - struct btrfs_tree_block_info *item, - struct btrfs_disk_key *key) -{ - read_eb_member(eb, item, struct btrfs_tree_block_info, key, key); -} - -static inline void btrfs_set_tree_block_key(const struct extent_buffer *eb, - struct btrfs_tree_block_info *item, - struct btrfs_disk_key *key) -{ - write_eb_member(eb, item, struct btrfs_tree_block_info, key, key); -} - -BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref, - root, 64); -BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref, - objectid, 64); -BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref, - offset, 64); -BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, - count, 32); - -BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, - count, 32); - -BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref, - type, 8); -BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref, - offset, 64); - -static inline u32 btrfs_extent_inline_ref_size(int type) -{ - if (type == BTRFS_TREE_BLOCK_REF_KEY || - type == BTRFS_SHARED_BLOCK_REF_KEY) - return sizeof(struct btrfs_extent_inline_ref); - if (type == BTRFS_SHARED_DATA_REF_KEY) - return sizeof(struct btrfs_shared_data_ref) + - sizeof(struct btrfs_extent_inline_ref); - if (type == BTRFS_EXTENT_DATA_REF_KEY) - return sizeof(struct btrfs_extent_data_ref) + - offsetof(struct btrfs_extent_inline_ref, offset); - return 0; -} - -/* struct btrfs_node */ -BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); -BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); -BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr, - blockptr, 64); -BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr, - generation, 64); - -static inline u64 btrfs_node_blockptr(const struct extent_buffer *eb, int nr) -{ - unsigned long ptr; - ptr = offsetof(struct btrfs_node, ptrs) + - sizeof(struct btrfs_key_ptr) * nr; - return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); -} - -static inline void btrfs_set_node_blockptr(const struct extent_buffer *eb, - int nr, u64 val) -{ - unsigned long ptr; - ptr = offsetof(struct btrfs_node, ptrs) + - sizeof(struct btrfs_key_ptr) * nr; - btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); -} - -static inline u64 btrfs_node_ptr_generation(const struct extent_buffer *eb, int nr) -{ - unsigned long ptr; - ptr = offsetof(struct btrfs_node, ptrs) + - sizeof(struct btrfs_key_ptr) * nr; - return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); -} - -static inline void btrfs_set_node_ptr_generation(const struct extent_buffer *eb, - int nr, u64 val) -{ - unsigned long ptr; - ptr = offsetof(struct btrfs_node, ptrs) + - sizeof(struct btrfs_key_ptr) * nr; - btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); -} - -static inline unsigned long btrfs_node_key_ptr_offset(int nr) -{ - return offsetof(struct btrfs_node, ptrs) + - sizeof(struct btrfs_key_ptr) * nr; -} - -void btrfs_node_key(const struct extent_buffer *eb, - struct btrfs_disk_key *disk_key, int nr); - -static inline void btrfs_set_node_key(const struct extent_buffer *eb, - struct btrfs_disk_key *disk_key, int nr) -{ - unsigned long ptr; - ptr = btrfs_node_key_ptr_offset(nr); - write_eb_member(eb, (struct btrfs_key_ptr *)ptr, - struct btrfs_key_ptr, key, disk_key); -} - -/* struct btrfs_item */ -BTRFS_SETGET_FUNCS(raw_item_offset, struct btrfs_item, offset, 32); -BTRFS_SETGET_FUNCS(raw_item_size, struct btrfs_item, size, 32); -BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32); -BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32); - -static inline unsigned long btrfs_item_nr_offset(int nr) -{ - return offsetof(struct btrfs_leaf, items) + - sizeof(struct btrfs_item) * nr; -} - -static inline struct btrfs_item *btrfs_item_nr(int nr) -{ - return (struct btrfs_item *)btrfs_item_nr_offset(nr); -} - -#define BTRFS_ITEM_SETGET_FUNCS(member) \ -static inline u32 btrfs_item_##member(const struct extent_buffer *eb, \ - int slot) \ -{ \ - return btrfs_raw_item_##member(eb, btrfs_item_nr(slot)); \ -} \ -static inline void btrfs_set_item_##member(const struct extent_buffer *eb, \ - int slot, u32 val) \ -{ \ - btrfs_set_raw_item_##member(eb, btrfs_item_nr(slot), val); \ -} \ -static inline u32 btrfs_token_item_##member(struct btrfs_map_token *token, \ - int slot) \ -{ \ - struct btrfs_item *item = btrfs_item_nr(slot); \ - return btrfs_token_raw_item_##member(token, item); \ -} \ -static inline void btrfs_set_token_item_##member(struct btrfs_map_token *token, \ - int slot, u32 val) \ -{ \ - struct btrfs_item *item = btrfs_item_nr(slot); \ - btrfs_set_token_raw_item_##member(token, item, val); \ -} - -BTRFS_ITEM_SETGET_FUNCS(offset) -BTRFS_ITEM_SETGET_FUNCS(size); - -static inline u32 btrfs_item_data_end(const struct extent_buffer *eb, int nr) -{ - return btrfs_item_offset(eb, nr) + btrfs_item_size(eb, nr); -} - -static inline void btrfs_item_key(const struct extent_buffer *eb, - struct btrfs_disk_key *disk_key, int nr) -{ - struct btrfs_item *item = btrfs_item_nr(nr); - read_eb_member(eb, item, struct btrfs_item, key, disk_key); -} - -static inline void btrfs_set_item_key(struct extent_buffer *eb, - struct btrfs_disk_key *disk_key, int nr) -{ - struct btrfs_item *item = btrfs_item_nr(nr); - write_eb_member(eb, item, struct btrfs_item, key, disk_key); -} - -BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64); - -/* - * struct btrfs_root_ref - */ -BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64); -BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64); -BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16); - -/* struct btrfs_dir_item */ -BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); -BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); -BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); -BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64); -BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8); -BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, - data_len, 16); -BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, - name_len, 16); -BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, - transid, 64); - -static inline void btrfs_dir_item_key(const struct extent_buffer *eb, - const struct btrfs_dir_item *item, - struct btrfs_disk_key *key) -{ - read_eb_member(eb, item, struct btrfs_dir_item, location, key); -} - -static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, - struct btrfs_dir_item *item, - const struct btrfs_disk_key *key) -{ - write_eb_member(eb, item, struct btrfs_dir_item, location, key); -} - -BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header, - num_entries, 64); -BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header, - num_bitmaps, 64); -BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header, - generation, 64); - -static inline void btrfs_free_space_key(const struct extent_buffer *eb, - const struct btrfs_free_space_header *h, - struct btrfs_disk_key *key) -{ - read_eb_member(eb, h, struct btrfs_free_space_header, location, key); -} - -static inline void btrfs_set_free_space_key(struct extent_buffer *eb, - struct btrfs_free_space_header *h, - const struct btrfs_disk_key *key) -{ - write_eb_member(eb, h, struct btrfs_free_space_header, location, key); -} - -/* struct btrfs_disk_key */ -BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, - objectid, 64); -BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); -BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); - -#ifdef __LITTLE_ENDIAN - -/* - * Optimized helpers for little-endian architectures where CPU and on-disk - * structures have the same endianness and we can skip conversions. - */ - -static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu_key, - const struct btrfs_disk_key *disk_key) -{ - memcpy(cpu_key, disk_key, sizeof(struct btrfs_key)); -} - -static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk_key, - const struct btrfs_key *cpu_key) -{ - memcpy(disk_key, cpu_key, sizeof(struct btrfs_key)); -} - -static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb, - struct btrfs_key *cpu_key, int nr) -{ - struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key; - - btrfs_node_key(eb, disk_key, nr); -} - -static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb, - struct btrfs_key *cpu_key, int nr) -{ - struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key; - - btrfs_item_key(eb, disk_key, nr); -} - -static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb, - const struct btrfs_dir_item *item, - struct btrfs_key *cpu_key) -{ - struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key; - - btrfs_dir_item_key(eb, item, disk_key); -} - -#else - -static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, - const struct btrfs_disk_key *disk) -{ - cpu->offset = le64_to_cpu(disk->offset); - cpu->type = disk->type; - cpu->objectid = le64_to_cpu(disk->objectid); -} - -static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, - const struct btrfs_key *cpu) -{ - disk->offset = cpu_to_le64(cpu->offset); - disk->type = cpu->type; - disk->objectid = cpu_to_le64(cpu->objectid); -} - -static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb, - struct btrfs_key *key, int nr) -{ - struct btrfs_disk_key disk_key; - btrfs_node_key(eb, &disk_key, nr); - btrfs_disk_key_to_cpu(key, &disk_key); -} - -static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb, - struct btrfs_key *key, int nr) -{ - struct btrfs_disk_key disk_key; - btrfs_item_key(eb, &disk_key, nr); - btrfs_disk_key_to_cpu(key, &disk_key); -} - -static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb, - const struct btrfs_dir_item *item, - struct btrfs_key *key) -{ - struct btrfs_disk_key disk_key; - btrfs_dir_item_key(eb, item, &disk_key); - btrfs_disk_key_to_cpu(key, &disk_key); -} - -#endif - -/* struct btrfs_header */ -BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); -BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, - generation, 64); -BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); -BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); -BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); -BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); -BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header, - generation, 64); -BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64); -BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, - nritems, 32); -BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64); - -static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag) -{ - return (btrfs_header_flags(eb) & flag) == flag; -} - -static inline void btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) -{ - u64 flags = btrfs_header_flags(eb); - btrfs_set_header_flags(eb, flags | flag); -} - -static inline void btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) -{ - u64 flags = btrfs_header_flags(eb); - btrfs_set_header_flags(eb, flags & ~flag); -} - -static inline int btrfs_header_backref_rev(const struct extent_buffer *eb) -{ - u64 flags = btrfs_header_flags(eb); - return flags >> BTRFS_BACKREF_REV_SHIFT; -} - -static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb, - int rev) -{ - u64 flags = btrfs_header_flags(eb); - flags &= ~BTRFS_BACKREF_REV_MASK; - flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT; - btrfs_set_header_flags(eb, flags); -} - -static inline int btrfs_is_leaf(const struct extent_buffer *eb) -{ - return btrfs_header_level(eb) == 0; -} - -/* struct btrfs_root_item */ -BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, - generation, 64); -BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); -BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); -BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); - -BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, - generation, 64); -BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); -BTRFS_SETGET_STACK_FUNCS(root_drop_level, struct btrfs_root_item, drop_level, 8); -BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); -BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); -BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); -BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64); -BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); -BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); -BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, - last_snapshot, 64); -BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item, - generation_v2, 64); -BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item, - ctransid, 64); -BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item, - otransid, 64); -BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item, - stransid, 64); -BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item, - rtransid, 64); - -static inline bool btrfs_root_readonly(const struct btrfs_root *root) -{ - /* Byte-swap the constant at compile time, root_item::flags is LE */ - return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0; -} - -static inline bool btrfs_root_dead(const struct btrfs_root *root) -{ - /* Byte-swap the constant at compile time, root_item::flags is LE */ - return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0; -} - -static inline u64 btrfs_root_id(const struct btrfs_root *root) -{ - return root->root_key.objectid; -} - -/* struct btrfs_root_backup */ -BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup, - tree_root, 64); -BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup, - tree_root_gen, 64); -BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup, - tree_root_level, 8); - -BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup, - chunk_root, 64); -BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup, - chunk_root_gen, 64); -BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup, - chunk_root_level, 8); - -BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup, - extent_root, 64); -BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup, - extent_root_gen, 64); -BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup, - extent_root_level, 8); - -BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup, - fs_root, 64); -BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup, - fs_root_gen, 64); -BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup, - fs_root_level, 8); - -BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup, - dev_root, 64); -BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup, - dev_root_gen, 64); -BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup, - dev_root_level, 8); - -BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup, - csum_root, 64); -BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup, - csum_root_gen, 64); -BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup, - csum_root_level, 8); -BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup, - total_bytes, 64); -BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup, - bytes_used, 64); -BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup, - num_devices, 64); - -/* struct btrfs_balance_item */ -BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64); - -static inline void btrfs_balance_data(const struct extent_buffer *eb, - const struct btrfs_balance_item *bi, - struct btrfs_disk_balance_args *ba) -{ - read_eb_member(eb, bi, struct btrfs_balance_item, data, ba); -} - -static inline void btrfs_set_balance_data(struct extent_buffer *eb, - struct btrfs_balance_item *bi, - const struct btrfs_disk_balance_args *ba) -{ - write_eb_member(eb, bi, struct btrfs_balance_item, data, ba); -} - -static inline void btrfs_balance_meta(const struct extent_buffer *eb, - const struct btrfs_balance_item *bi, - struct btrfs_disk_balance_args *ba) -{ - read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); -} - -static inline void btrfs_set_balance_meta(struct extent_buffer *eb, - struct btrfs_balance_item *bi, - const struct btrfs_disk_balance_args *ba) -{ - write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); -} - -static inline void btrfs_balance_sys(const struct extent_buffer *eb, - const struct btrfs_balance_item *bi, - struct btrfs_disk_balance_args *ba) -{ - read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); -} - -static inline void btrfs_set_balance_sys(struct extent_buffer *eb, - struct btrfs_balance_item *bi, - const struct btrfs_disk_balance_args *ba) -{ - write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); -} - -static inline void -btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu, - const struct btrfs_disk_balance_args *disk) -{ - memset(cpu, 0, sizeof(*cpu)); - - cpu->profiles = le64_to_cpu(disk->profiles); - cpu->usage = le64_to_cpu(disk->usage); - cpu->devid = le64_to_cpu(disk->devid); - cpu->pstart = le64_to_cpu(disk->pstart); - cpu->pend = le64_to_cpu(disk->pend); - cpu->vstart = le64_to_cpu(disk->vstart); - cpu->vend = le64_to_cpu(disk->vend); - cpu->target = le64_to_cpu(disk->target); - cpu->flags = le64_to_cpu(disk->flags); - cpu->limit = le64_to_cpu(disk->limit); - cpu->stripes_min = le32_to_cpu(disk->stripes_min); - cpu->stripes_max = le32_to_cpu(disk->stripes_max); -} - -static inline void -btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk, - const struct btrfs_balance_args *cpu) -{ - memset(disk, 0, sizeof(*disk)); - - disk->profiles = cpu_to_le64(cpu->profiles); - disk->usage = cpu_to_le64(cpu->usage); - disk->devid = cpu_to_le64(cpu->devid); - disk->pstart = cpu_to_le64(cpu->pstart); - disk->pend = cpu_to_le64(cpu->pend); - disk->vstart = cpu_to_le64(cpu->vstart); - disk->vend = cpu_to_le64(cpu->vend); - disk->target = cpu_to_le64(cpu->target); - disk->flags = cpu_to_le64(cpu->flags); - disk->limit = cpu_to_le64(cpu->limit); - disk->stripes_min = cpu_to_le32(cpu->stripes_min); - disk->stripes_max = cpu_to_le32(cpu->stripes_max); -} - -/* struct btrfs_super_block */ -BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); -BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); -BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, - generation, 64); -BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); -BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, - struct btrfs_super_block, sys_chunk_array_size, 32); -BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation, - struct btrfs_super_block, chunk_root_generation, 64); -BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, - root_level, 8); -BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, - chunk_root, 64); -BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, - chunk_root_level, 8); -BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, - log_root, 64); -BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block, - log_root_level, 8); -BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, - total_bytes, 64); -BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, - bytes_used, 64); -BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, - sectorsize, 32); -BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, - nodesize, 32); -BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, - stripesize, 32); -BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, - root_dir_objectid, 64); -BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, - num_devices, 64); -BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block, - compat_flags, 64); -BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, - compat_ro_flags, 64); -BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, - incompat_flags, 64); -BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, - csum_type, 16); -BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block, - cache_generation, 64); -BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64); -BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block, - uuid_tree_generation, 64); - -int btrfs_super_csum_size(const struct btrfs_super_block *s); -const char *btrfs_super_csum_name(u16 csum_type); -const char *btrfs_super_csum_driver(u16 csum_type); -size_t __attribute_const__ btrfs_get_num_csums(void); - - -/* - * The leaf data grows from end-to-front in the node. - * this returns the address of the start of the last item, - * which is the stop of the leaf data stack - */ -static inline unsigned int leaf_data_end(const struct extent_buffer *leaf) -{ - u32 nr = btrfs_header_nritems(leaf); - - if (nr == 0) - return BTRFS_LEAF_DATA_SIZE(leaf->fs_info); - return btrfs_item_offset(leaf, nr - 1); -} - -/* struct btrfs_file_extent_item */ -BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item, - type, 8); -BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, - struct btrfs_file_extent_item, disk_bytenr, 64); -BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, - struct btrfs_file_extent_item, offset, 64); -BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, - struct btrfs_file_extent_item, generation, 64); -BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, - struct btrfs_file_extent_item, num_bytes, 64); -BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes, - struct btrfs_file_extent_item, ram_bytes, 64); -BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes, - struct btrfs_file_extent_item, disk_num_bytes, 64); -BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, - struct btrfs_file_extent_item, compression, 8); - -static inline unsigned long -btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e) -{ - return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START; -} - -static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) -{ - return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize; -} - -BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); -BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, - disk_bytenr, 64); -BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, - generation, 64); -BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, - disk_num_bytes, 64); -BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, - offset, 64); -BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, - num_bytes, 64); -BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item, - ram_bytes, 64); -BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item, - compression, 8); -BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item, - encryption, 8); -BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item, - other_encoding, 16); - -/* - * this returns the number of bytes used by the item on disk, minus the - * size of any extent headers. If a file is compressed on disk, this is - * the compressed size - */ -static inline u32 btrfs_file_extent_inline_item_len( - const struct extent_buffer *eb, - int nr) -{ - return btrfs_item_size(eb, nr) - BTRFS_FILE_EXTENT_INLINE_DATA_START; -} - -/* btrfs_qgroup_status_item */ -BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item, - generation, 64); -BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item, - version, 64); -BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item, - flags, 64); -BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item, - rescan, 64); - -/* btrfs_qgroup_info_item */ -BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item, - generation, 64); -BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64); -BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item, - rfer_cmpr, 64); -BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64); -BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item, - excl_cmpr, 64); - -BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation, - struct btrfs_qgroup_info_item, generation, 64); -BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item, - rfer, 64); -BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr, - struct btrfs_qgroup_info_item, rfer_cmpr, 64); -BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item, - excl, 64); -BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr, - struct btrfs_qgroup_info_item, excl_cmpr, 64); - -/* btrfs_qgroup_limit_item */ -BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item, - flags, 64); -BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item, - max_rfer, 64); -BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item, - max_excl, 64); -BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item, - rsv_rfer, 64); -BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item, - rsv_excl, 64); - -/* btrfs_dev_replace_item */ -BTRFS_SETGET_FUNCS(dev_replace_src_devid, - struct btrfs_dev_replace_item, src_devid, 64); -BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode, - struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode, - 64); -BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item, - replace_state, 64); -BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item, - time_started, 64); -BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item, - time_stopped, 64); -BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item, - num_write_errors, 64); -BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors, - struct btrfs_dev_replace_item, num_uncorrectable_read_errors, - 64); -BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item, - cursor_left, 64); -BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item, - cursor_right, 64); - -BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid, - struct btrfs_dev_replace_item, src_devid, 64); -BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode, - struct btrfs_dev_replace_item, - cont_reading_from_srcdev_mode, 64); -BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state, - struct btrfs_dev_replace_item, replace_state, 64); -BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started, - struct btrfs_dev_replace_item, time_started, 64); -BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped, - struct btrfs_dev_replace_item, time_stopped, 64); -BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors, - struct btrfs_dev_replace_item, num_write_errors, 64); -BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors, - struct btrfs_dev_replace_item, - num_uncorrectable_read_errors, 64); -BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left, - struct btrfs_dev_replace_item, cursor_left, 64); -BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right, - struct btrfs_dev_replace_item, cursor_right, 64); - -/* helper function to cast into the data area of the leaf. */ -#define btrfs_item_ptr(leaf, slot, type) \ - ((type *)(BTRFS_LEAF_DATA_OFFSET + \ - btrfs_item_offset(leaf, slot))) - -#define btrfs_item_ptr_offset(leaf, slot) \ - ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \ - btrfs_item_offset(leaf, slot))) - static inline u32 btrfs_crc32c(u32 crc, const void *address, unsigned length) { return crc32c(crc, address, length); @@ -2846,163 +498,15 @@ static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping) return mapping_gfp_constraint(mapping, ~__GFP_FS); } -/* extent-tree.c */ - -enum btrfs_inline_ref_type { - BTRFS_REF_TYPE_INVALID, - BTRFS_REF_TYPE_BLOCK, - BTRFS_REF_TYPE_DATA, - BTRFS_REF_TYPE_ANY, -}; - -int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb, - struct btrfs_extent_inline_ref *iref, - enum btrfs_inline_ref_type is_data); -u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset); - - -int btrfs_add_excluded_extent(struct btrfs_fs_info *fs_info, - u64 start, u64 num_bytes); -void btrfs_free_excluded_extents(struct btrfs_block_group *cache); -int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, - unsigned long count); -void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info, - struct btrfs_delayed_ref_root *delayed_refs, - struct btrfs_delayed_ref_head *head); -int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len); -int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans, - struct btrfs_fs_info *fs_info, u64 bytenr, - u64 offset, int metadata, u64 *refs, u64 *flags); -int btrfs_pin_extent(struct btrfs_trans_handle *trans, u64 bytenr, u64 num, - int reserved); -int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans, - u64 bytenr, u64 num_bytes); -int btrfs_exclude_logged_extents(struct extent_buffer *eb); -int btrfs_cross_ref_exist(struct btrfs_root *root, - u64 objectid, u64 offset, u64 bytenr, bool strict, - struct btrfs_path *path); -struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans, - struct btrfs_root *root, - u64 parent, u64 root_objectid, - const struct btrfs_disk_key *key, - int level, u64 hint, - u64 empty_size, - enum btrfs_lock_nesting nest); -void btrfs_free_tree_block(struct btrfs_trans_handle *trans, - u64 root_id, - struct extent_buffer *buf, - u64 parent, int last_ref); -int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans, - struct btrfs_root *root, u64 owner, - u64 offset, u64 ram_bytes, - struct btrfs_key *ins); -int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, - u64 root_objectid, u64 owner, u64 offset, - struct btrfs_key *ins); -int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes, - u64 min_alloc_size, u64 empty_size, u64 hint_byte, - struct btrfs_key *ins, int is_data, int delalloc); -int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, - struct extent_buffer *buf, int full_backref); -int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, - struct extent_buffer *buf, int full_backref); -int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans, - struct extent_buffer *eb, u64 flags, int level); -int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref); - -int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info, - u64 start, u64 len, int delalloc); -int btrfs_pin_reserved_extent(struct btrfs_trans_handle *trans, u64 start, - u64 len); -int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans); -int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, - struct btrfs_ref *generic_ref); - -void btrfs_clear_space_info_full(struct btrfs_fs_info *info); - -/* - * Different levels for to flush space when doing space reservations. - * - * The higher the level, the more methods we try to reclaim space. - */ -enum btrfs_reserve_flush_enum { - /* If we are in the transaction, we can't flush anything.*/ - BTRFS_RESERVE_NO_FLUSH, - - /* - * Flush space by: - * - Running delayed inode items - * - Allocating a new chunk - */ - BTRFS_RESERVE_FLUSH_LIMIT, - - /* - * Flush space by: - * - Running delayed inode items - * - Running delayed refs - * - Running delalloc and waiting for ordered extents - * - Allocating a new chunk - */ - BTRFS_RESERVE_FLUSH_EVICT, - - /* - * Flush space by above mentioned methods and by: - * - Running delayed iputs - * - Committing transaction - * - * Can be interrupted by a fatal signal. - */ - BTRFS_RESERVE_FLUSH_DATA, - BTRFS_RESERVE_FLUSH_FREE_SPACE_INODE, - BTRFS_RESERVE_FLUSH_ALL, - - /* - * Pretty much the same as FLUSH_ALL, but can also steal space from - * global rsv. - * - * Can be interrupted by a fatal signal. - */ - BTRFS_RESERVE_FLUSH_ALL_STEAL, -}; - -enum btrfs_flush_state { - FLUSH_DELAYED_ITEMS_NR = 1, - FLUSH_DELAYED_ITEMS = 2, - FLUSH_DELAYED_REFS_NR = 3, - FLUSH_DELAYED_REFS = 4, - FLUSH_DELALLOC = 5, - FLUSH_DELALLOC_WAIT = 6, - FLUSH_DELALLOC_FULL = 7, - ALLOC_CHUNK = 8, - ALLOC_CHUNK_FORCE = 9, - RUN_DELAYED_IPUTS = 10, - COMMIT_TRANS = 11, -}; - -int btrfs_subvolume_reserve_metadata(struct btrfs_root *root, - struct btrfs_block_rsv *rsv, - int nitems, bool use_global_rsv); -void btrfs_subvolume_release_metadata(struct btrfs_root *root, - struct btrfs_block_rsv *rsv); -void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes); - -int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes, - u64 disk_num_bytes, bool noflush); -u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo); int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info, u64 start, u64 end); int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr, u64 num_bytes, u64 *actual_bytes); int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range); -int btrfs_init_space_info(struct btrfs_fs_info *fs_info); -int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans, - struct btrfs_fs_info *fs_info); -int btrfs_start_write_no_snapshotting(struct btrfs_root *root); -void btrfs_end_write_no_snapshotting(struct btrfs_root *root); -void btrfs_wait_for_snapshot_creation(struct btrfs_root *root); - /* ctree.c */ +int __init btrfs_ctree_init(void); +void __cold btrfs_ctree_exit(void); int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key, int *slot); int __pure btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2); @@ -3163,14 +667,7 @@ int btrfs_get_next_valid_item(struct btrfs_root *root, struct btrfs_key *key, (path)->slots[0]++ \ ) -static inline int btrfs_next_old_item(struct btrfs_root *root, - struct btrfs_path *p, u64 time_seq) -{ - ++p->slots[0]; - if (p->slots[0] >= btrfs_header_nritems(p->nodes[0])) - return btrfs_next_old_leaf(root, p, time_seq); - return 0; -} +int btrfs_next_old_item(struct btrfs_root *root, struct btrfs_path *path, u64 time_seq); /* * Search the tree again to find a leaf with greater keys. @@ -3188,865 +685,6 @@ static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p) return btrfs_next_old_item(root, p, 0); } int btrfs_leaf_free_space(struct extent_buffer *leaf); -int __must_check btrfs_drop_snapshot(struct btrfs_root *root, int update_ref, - int for_reloc); -int btrfs_drop_subtree(struct btrfs_trans_handle *trans, - struct btrfs_root *root, - struct extent_buffer *node, - struct extent_buffer *parent); -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); -} - -/* root-item.c */ -int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id, - u64 ref_id, u64 dirid, u64 sequence, const char *name, - int name_len); -int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id, - u64 ref_id, u64 dirid, u64 *sequence, const char *name, - int name_len); -int btrfs_del_root(struct btrfs_trans_handle *trans, - const struct btrfs_key *key); -int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, - const struct btrfs_key *key, - struct btrfs_root_item *item); -int __must_check btrfs_update_root(struct btrfs_trans_handle *trans, - struct btrfs_root *root, - struct btrfs_key *key, - struct btrfs_root_item *item); -int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key, - struct btrfs_path *path, struct btrfs_root_item *root_item, - struct btrfs_key *root_key); -int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info); -void btrfs_set_root_node(struct btrfs_root_item *item, - struct extent_buffer *node); -void btrfs_check_and_init_root_item(struct btrfs_root_item *item); -void btrfs_update_root_times(struct btrfs_trans_handle *trans, - struct btrfs_root *root); - -/* uuid-tree.c */ -int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type, - u64 subid); -int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type, - u64 subid); -int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info); - -/* dir-item.c */ -int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir, - const char *name, int name_len); -int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name, - int name_len, struct btrfs_inode *dir, - struct btrfs_key *location, u8 type, u64 index); -struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, - struct btrfs_root *root, - struct btrfs_path *path, u64 dir, - const char *name, int name_len, - int mod); -struct btrfs_dir_item * -btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, - struct btrfs_root *root, - struct btrfs_path *path, u64 dir, - u64 index, const char *name, int name_len, - int mod); -struct btrfs_dir_item * -btrfs_search_dir_index_item(struct btrfs_root *root, - struct btrfs_path *path, u64 dirid, - const char *name, int name_len); -int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, - struct btrfs_root *root, - struct btrfs_path *path, - struct btrfs_dir_item *di); -int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, - struct btrfs_root *root, - struct btrfs_path *path, u64 objectid, - const char *name, u16 name_len, - const void *data, u16 data_len); -struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, - struct btrfs_root *root, - struct btrfs_path *path, u64 dir, - const char *name, u16 name_len, - int mod); -struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info, - struct btrfs_path *path, - const char *name, - int name_len); - -/* orphan.c */ -int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans, - struct btrfs_root *root, u64 offset); -int btrfs_del_orphan_item(struct btrfs_trans_handle *trans, - struct btrfs_root *root, u64 offset); -int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset); - -/* file-item.c */ -int btrfs_del_csums(struct btrfs_trans_handle *trans, - struct btrfs_root *root, u64 bytenr, u64 len); -blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, u8 *dst); -int btrfs_insert_hole_extent(struct btrfs_trans_handle *trans, - struct btrfs_root *root, u64 objectid, u64 pos, - u64 num_bytes); -int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, - struct btrfs_root *root, - struct btrfs_path *path, u64 objectid, - u64 bytenr, int mod); -int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, - struct btrfs_root *root, - struct btrfs_ordered_sum *sums); -blk_status_t btrfs_csum_one_bio(struct btrfs_inode *inode, struct bio *bio, - u64 offset, bool one_ordered); -int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, - struct list_head *list, int search_commit, - bool nowait); -void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode, - const struct btrfs_path *path, - struct btrfs_file_extent_item *fi, - const bool new_inline, - struct extent_map *em); -int btrfs_inode_clear_file_extent_range(struct btrfs_inode *inode, u64 start, - u64 len); -int btrfs_inode_set_file_extent_range(struct btrfs_inode *inode, u64 start, - u64 len); -void btrfs_inode_safe_disk_i_size_write(struct btrfs_inode *inode, u64 new_i_size); -u64 btrfs_file_extent_end(const struct btrfs_path *path); - -/* inode.c */ -void btrfs_submit_data_write_bio(struct inode *inode, struct bio *bio, int mirror_num); -void btrfs_submit_data_read_bio(struct inode *inode, struct bio *bio, - int mirror_num, enum btrfs_compression_type compress_type); -int btrfs_check_sector_csum(struct btrfs_fs_info *fs_info, struct page *page, - u32 pgoff, u8 *csum, const u8 * const csum_expected); -int btrfs_check_data_csum(struct inode *inode, struct btrfs_bio *bbio, - u32 bio_offset, struct page *page, u32 pgoff); -unsigned int btrfs_verify_data_csum(struct btrfs_bio *bbio, - u32 bio_offset, struct page *page, - u64 start, u64 end); -int btrfs_check_data_csum(struct inode *inode, struct btrfs_bio *bbio, - u32 bio_offset, struct page *page, u32 pgoff); -noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len, - u64 *orig_start, u64 *orig_block_len, - u64 *ram_bytes, bool nowait, bool strict); - -void __btrfs_del_delalloc_inode(struct btrfs_root *root, - struct btrfs_inode *inode); -struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); -int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index); -int btrfs_unlink_inode(struct btrfs_trans_handle *trans, - struct btrfs_inode *dir, struct btrfs_inode *inode, - const char *name, int name_len); -int btrfs_add_link(struct btrfs_trans_handle *trans, - struct btrfs_inode *parent_inode, struct btrfs_inode *inode, - const char *name, int name_len, int add_backref, u64 index); -int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry); -int btrfs_truncate_block(struct btrfs_inode *inode, loff_t from, loff_t len, - int front); - -int btrfs_start_delalloc_snapshot(struct btrfs_root *root, bool in_reclaim_context); -int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, long nr, - bool in_reclaim_context); -int btrfs_set_extent_delalloc(struct btrfs_inode *inode, u64 start, u64 end, - unsigned int extra_bits, - struct extent_state **cached_state); -struct btrfs_new_inode_args { - /* Input */ - struct inode *dir; - struct dentry *dentry; - struct inode *inode; - bool orphan; - bool subvol; - - /* - * Output from btrfs_new_inode_prepare(), input to - * btrfs_create_new_inode(). - */ - struct posix_acl *default_acl; - struct posix_acl *acl; -}; -int btrfs_new_inode_prepare(struct btrfs_new_inode_args *args, - unsigned int *trans_num_items); -int btrfs_create_new_inode(struct btrfs_trans_handle *trans, - struct btrfs_new_inode_args *args); -void btrfs_new_inode_args_destroy(struct btrfs_new_inode_args *args); -struct inode *btrfs_new_subvol_inode(struct user_namespace *mnt_userns, - struct inode *dir); - void btrfs_set_delalloc_extent(struct inode *inode, struct extent_state *state, - u32 bits); -void btrfs_clear_delalloc_extent(struct inode *inode, - struct extent_state *state, u32 bits); -void btrfs_merge_delalloc_extent(struct inode *inode, struct extent_state *new, - struct extent_state *other); -void btrfs_split_delalloc_extent(struct inode *inode, - struct extent_state *orig, u64 split); -void btrfs_set_range_writeback(struct btrfs_inode *inode, u64 start, u64 end); -vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf); -void btrfs_evict_inode(struct inode *inode); -struct inode *btrfs_alloc_inode(struct super_block *sb); -void btrfs_destroy_inode(struct inode *inode); -void btrfs_free_inode(struct inode *inode); -int btrfs_drop_inode(struct inode *inode); -int __init btrfs_init_cachep(void); -void __cold btrfs_destroy_cachep(void); -struct inode *btrfs_iget_path(struct super_block *s, u64 ino, - struct btrfs_root *root, struct btrfs_path *path); -struct inode *btrfs_iget(struct super_block *s, u64 ino, struct btrfs_root *root); -struct extent_map *btrfs_get_extent(struct btrfs_inode *inode, - struct page *page, size_t pg_offset, - u64 start, u64 end); -int btrfs_update_inode(struct btrfs_trans_handle *trans, - struct btrfs_root *root, struct btrfs_inode *inode); -int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans, - struct btrfs_root *root, struct btrfs_inode *inode); -int btrfs_orphan_add(struct btrfs_trans_handle *trans, - struct btrfs_inode *inode); -int btrfs_orphan_cleanup(struct btrfs_root *root); -int btrfs_cont_expand(struct btrfs_inode *inode, loff_t oldsize, loff_t size); -void btrfs_add_delayed_iput(struct inode *inode); -void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info); -int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info *fs_info); -int btrfs_prealloc_file_range(struct inode *inode, int mode, - u64 start, u64 num_bytes, u64 min_size, - loff_t actual_len, u64 *alloc_hint); -int btrfs_prealloc_file_range_trans(struct inode *inode, - struct btrfs_trans_handle *trans, int mode, - u64 start, u64 num_bytes, u64 min_size, - loff_t actual_len, u64 *alloc_hint); -int btrfs_run_delalloc_range(struct btrfs_inode *inode, struct page *locked_page, - u64 start, u64 end, int *page_started, unsigned long *nr_written, - struct writeback_control *wbc); -int btrfs_writepage_cow_fixup(struct page *page); -void btrfs_writepage_endio_finish_ordered(struct btrfs_inode *inode, - struct page *page, u64 start, - u64 end, bool uptodate); -int btrfs_encoded_io_compression_from_extent(struct btrfs_fs_info *fs_info, - int compress_type); -int btrfs_encoded_read_regular_fill_pages(struct btrfs_inode *inode, - u64 file_offset, u64 disk_bytenr, - u64 disk_io_size, - struct page **pages); -ssize_t btrfs_encoded_read(struct kiocb *iocb, struct iov_iter *iter, - struct btrfs_ioctl_encoded_io_args *encoded); -ssize_t btrfs_do_encoded_write(struct kiocb *iocb, struct iov_iter *from, - const struct btrfs_ioctl_encoded_io_args *encoded); - -ssize_t btrfs_dio_read(struct kiocb *iocb, struct iov_iter *iter, - size_t done_before); -struct iomap_dio *btrfs_dio_write(struct kiocb *iocb, struct iov_iter *iter, - size_t done_before); - -extern const struct dentry_operations btrfs_dentry_operations; - -/* Inode locking type flags, by default the exclusive lock is taken */ -#define BTRFS_ILOCK_SHARED (1U << 0) -#define BTRFS_ILOCK_TRY (1U << 1) -#define BTRFS_ILOCK_MMAP (1U << 2) - -int btrfs_inode_lock(struct inode *inode, unsigned int ilock_flags); -void btrfs_inode_unlock(struct inode *inode, unsigned int ilock_flags); -void btrfs_update_inode_bytes(struct btrfs_inode *inode, - const u64 add_bytes, - const u64 del_bytes); -void btrfs_assert_inode_range_clean(struct btrfs_inode *inode, u64 start, u64 end); - -/* ioctl.c */ -long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); -long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg); -int btrfs_fileattr_get(struct dentry *dentry, struct fileattr *fa); -int btrfs_fileattr_set(struct user_namespace *mnt_userns, - struct dentry *dentry, struct fileattr *fa); -int btrfs_ioctl_get_supported_features(void __user *arg); -void btrfs_sync_inode_flags_to_i_flags(struct inode *inode); -int __pure btrfs_is_empty_uuid(u8 *uuid); -int btrfs_defrag_file(struct inode *inode, struct file_ra_state *ra, - struct btrfs_ioctl_defrag_range_args *range, - u64 newer_than, unsigned long max_to_defrag); -void btrfs_get_block_group_info(struct list_head *groups_list, - struct btrfs_ioctl_space_info *space); -void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info, - struct btrfs_ioctl_balance_args *bargs); - -/* file.c */ -int __init btrfs_auto_defrag_init(void); -void __cold btrfs_auto_defrag_exit(void); -int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans, - struct btrfs_inode *inode, u32 extent_thresh); -int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info); -void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info); -int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync); -extern const struct file_operations btrfs_file_operations; -int btrfs_drop_extents(struct btrfs_trans_handle *trans, - struct btrfs_root *root, struct btrfs_inode *inode, - struct btrfs_drop_extents_args *args); -int btrfs_replace_file_extents(struct btrfs_inode *inode, - struct btrfs_path *path, const u64 start, - const u64 end, - struct btrfs_replace_extent_info *extent_info, - struct btrfs_trans_handle **trans_out); -int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, - struct btrfs_inode *inode, u64 start, u64 end); -ssize_t btrfs_do_write_iter(struct kiocb *iocb, struct iov_iter *from, - const struct btrfs_ioctl_encoded_io_args *encoded); -int btrfs_release_file(struct inode *inode, struct file *file); -int btrfs_dirty_pages(struct btrfs_inode *inode, struct page **pages, - size_t num_pages, loff_t pos, size_t write_bytes, - struct extent_state **cached, bool noreserve); -int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end); -int btrfs_check_nocow_lock(struct btrfs_inode *inode, loff_t pos, - size_t *write_bytes, bool nowait); -void btrfs_check_nocow_unlock(struct btrfs_inode *inode); -bool btrfs_find_delalloc_in_range(struct btrfs_inode *inode, u64 start, u64 end, - u64 *delalloc_start_ret, u64 *delalloc_end_ret); - -/* tree-defrag.c */ -int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, - struct btrfs_root *root); - -/* super.c */ -int btrfs_parse_options(struct btrfs_fs_info *info, char *options, - unsigned long new_flags); -int btrfs_sync_fs(struct super_block *sb, int wait); -char *btrfs_get_subvol_name_from_objectid(struct btrfs_fs_info *fs_info, - u64 subvol_objectid); - -static inline __printf(2, 3) __cold -void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...) -{ -} - -#ifdef CONFIG_PRINTK_INDEX - -#define btrfs_printk(fs_info, fmt, args...) \ -do { \ - printk_index_subsys_emit("%sBTRFS %s (device %s): ", NULL, fmt); \ - _btrfs_printk(fs_info, fmt, ##args); \ -} while (0) - -__printf(2, 3) -__cold -void _btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...); - -#elif defined(CONFIG_PRINTK) - -#define btrfs_printk(fs_info, fmt, args...) \ - _btrfs_printk(fs_info, fmt, ##args) - -__printf(2, 3) -__cold -void _btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...); - -#else - -#define btrfs_printk(fs_info, fmt, args...) \ - btrfs_no_printk(fs_info, fmt, ##args) -#endif - -#define btrfs_emerg(fs_info, fmt, args...) \ - btrfs_printk(fs_info, KERN_EMERG fmt, ##args) -#define btrfs_alert(fs_info, fmt, args...) \ - btrfs_printk(fs_info, KERN_ALERT fmt, ##args) -#define btrfs_crit(fs_info, fmt, args...) \ - btrfs_printk(fs_info, KERN_CRIT fmt, ##args) -#define btrfs_err(fs_info, fmt, args...) \ - btrfs_printk(fs_info, KERN_ERR fmt, ##args) -#define btrfs_warn(fs_info, fmt, args...) \ - btrfs_printk(fs_info, KERN_WARNING fmt, ##args) -#define btrfs_notice(fs_info, fmt, args...) \ - btrfs_printk(fs_info, KERN_NOTICE fmt, ##args) -#define btrfs_info(fs_info, fmt, args...) \ - btrfs_printk(fs_info, KERN_INFO fmt, ##args) - -/* - * Wrappers that use printk_in_rcu - */ -#define btrfs_emerg_in_rcu(fs_info, fmt, args...) \ - btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args) -#define btrfs_alert_in_rcu(fs_info, fmt, args...) \ - btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args) -#define btrfs_crit_in_rcu(fs_info, fmt, args...) \ - btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args) -#define btrfs_err_in_rcu(fs_info, fmt, args...) \ - btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args) -#define btrfs_warn_in_rcu(fs_info, fmt, args...) \ - btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args) -#define btrfs_notice_in_rcu(fs_info, fmt, args...) \ - btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args) -#define btrfs_info_in_rcu(fs_info, fmt, args...) \ - btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args) - -/* - * Wrappers that use a ratelimited printk_in_rcu - */ -#define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \ - btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args) -#define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \ - btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args) -#define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \ - btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args) -#define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \ - btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args) -#define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \ - btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args) -#define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \ - btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args) -#define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \ - btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args) - -/* - * Wrappers that use a ratelimited printk - */ -#define btrfs_emerg_rl(fs_info, fmt, args...) \ - btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args) -#define btrfs_alert_rl(fs_info, fmt, args...) \ - btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args) -#define btrfs_crit_rl(fs_info, fmt, args...) \ - btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args) -#define btrfs_err_rl(fs_info, fmt, args...) \ - btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args) -#define btrfs_warn_rl(fs_info, fmt, args...) \ - btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args) -#define btrfs_notice_rl(fs_info, fmt, args...) \ - btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args) -#define btrfs_info_rl(fs_info, fmt, args...) \ - btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args) - -#if defined(CONFIG_DYNAMIC_DEBUG) -#define btrfs_debug(fs_info, fmt, args...) \ - _dynamic_func_call_no_desc(fmt, btrfs_printk, \ - fs_info, KERN_DEBUG fmt, ##args) -#define btrfs_debug_in_rcu(fs_info, fmt, args...) \ - _dynamic_func_call_no_desc(fmt, btrfs_printk_in_rcu, \ - fs_info, KERN_DEBUG fmt, ##args) -#define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ - _dynamic_func_call_no_desc(fmt, btrfs_printk_rl_in_rcu, \ - fs_info, KERN_DEBUG fmt, ##args) -#define btrfs_debug_rl(fs_info, fmt, args...) \ - _dynamic_func_call_no_desc(fmt, btrfs_printk_ratelimited, \ - fs_info, KERN_DEBUG fmt, ##args) -#elif defined(DEBUG) -#define btrfs_debug(fs_info, fmt, args...) \ - btrfs_printk(fs_info, KERN_DEBUG fmt, ##args) -#define btrfs_debug_in_rcu(fs_info, fmt, args...) \ - btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) -#define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ - btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args) -#define btrfs_debug_rl(fs_info, fmt, args...) \ - btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args) -#else -#define btrfs_debug(fs_info, fmt, args...) \ - btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) -#define btrfs_debug_in_rcu(fs_info, fmt, args...) \ - btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) -#define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ - btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) -#define btrfs_debug_rl(fs_info, fmt, args...) \ - btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) -#endif - -#define btrfs_printk_in_rcu(fs_info, fmt, args...) \ -do { \ - rcu_read_lock(); \ - btrfs_printk(fs_info, fmt, ##args); \ - rcu_read_unlock(); \ -} while (0) - -#define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \ -do { \ - rcu_read_lock(); \ - btrfs_no_printk(fs_info, fmt, ##args); \ - rcu_read_unlock(); \ -} while (0) - -#define btrfs_printk_ratelimited(fs_info, fmt, args...) \ -do { \ - static DEFINE_RATELIMIT_STATE(_rs, \ - DEFAULT_RATELIMIT_INTERVAL, \ - DEFAULT_RATELIMIT_BURST); \ - if (__ratelimit(&_rs)) \ - btrfs_printk(fs_info, fmt, ##args); \ -} while (0) - -#define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \ -do { \ - rcu_read_lock(); \ - btrfs_printk_ratelimited(fs_info, fmt, ##args); \ - rcu_read_unlock(); \ -} while (0) - -#ifdef CONFIG_BTRFS_ASSERT -__cold __noreturn -static inline void assertfail(const char *expr, const char *file, int line) -{ - pr_err("assertion failed: %s, in %s:%d\n", expr, file, line); - BUG(); -} - -#define ASSERT(expr) \ - (likely(expr) ? (void)0 : assertfail(#expr, __FILE__, __LINE__)) - -#else -static inline void assertfail(const char *expr, const char* file, int line) { } -#define ASSERT(expr) (void)(expr) -#endif - -#if BITS_PER_LONG == 32 -#define BTRFS_32BIT_MAX_FILE_SIZE (((u64)ULONG_MAX + 1) << PAGE_SHIFT) -/* - * The warning threshold is 5/8th of the MAX_LFS_FILESIZE that limits the logical - * addresses of extents. - * - * For 4K page size it's about 10T, for 64K it's 160T. - */ -#define BTRFS_32BIT_EARLY_WARN_THRESHOLD (BTRFS_32BIT_MAX_FILE_SIZE * 5 / 8) -void btrfs_warn_32bit_limit(struct btrfs_fs_info *fs_info); -void btrfs_err_32bit_limit(struct btrfs_fs_info *fs_info); -#endif - -/* - * Get the correct offset inside the page of extent buffer. - * - * @eb: target extent buffer - * @start: offset inside the extent buffer - * - * Will handle both sectorsize == PAGE_SIZE and sectorsize < PAGE_SIZE cases. - */ -static inline size_t get_eb_offset_in_page(const struct extent_buffer *eb, - unsigned long offset) -{ - /* - * For sectorsize == PAGE_SIZE case, eb->start will always be aligned - * to PAGE_SIZE, thus adding it won't cause any difference. - * - * For sectorsize < PAGE_SIZE, we must only read the data that belongs - * to the eb, thus we have to take the eb->start into consideration. - */ - return offset_in_page(offset + eb->start); -} - -static inline unsigned long get_eb_page_index(unsigned long offset) -{ - /* - * For sectorsize == PAGE_SIZE case, plain >> PAGE_SHIFT is enough. - * - * For sectorsize < PAGE_SIZE case, we only support 64K PAGE_SIZE, - * and have ensured that all tree blocks are contained in one page, - * thus we always get index == 0. - */ - return offset >> PAGE_SHIFT; -} - -/* - * Use that for functions that are conditionally exported for sanity tests but - * otherwise static - */ -#ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS -#define EXPORT_FOR_TESTS static -#else -#define EXPORT_FOR_TESTS -#endif - -__cold -static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info) -{ - btrfs_err(fs_info, -"Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel"); -} - -__printf(5, 6) -__cold -void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function, - unsigned int line, int errno, const char *fmt, ...); - -const char * __attribute_const__ btrfs_decode_error(int errno); - -__cold -void __btrfs_abort_transaction(struct btrfs_trans_handle *trans, - const char *function, - unsigned int line, int errno, bool first_hit); - -bool __cold abort_should_print_stack(int errno); - -/* - * Call btrfs_abort_transaction as early as possible when an error condition is - * detected, that way the exact stack trace is reported for some errors. - */ -#define btrfs_abort_transaction(trans, errno) \ -do { \ - bool first = false; \ - /* Report first abort since mount */ \ - if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \ - &((trans)->fs_info->fs_state))) { \ - first = true; \ - if (WARN(abort_should_print_stack(errno), \ - KERN_DEBUG \ - "BTRFS: Transaction aborted (error %d)\n", \ - (errno))) { \ - /* Stack trace printed. */ \ - } else { \ - btrfs_debug((trans)->fs_info, \ - "Transaction aborted (error %d)", \ - (errno)); \ - } \ - } \ - __btrfs_abort_transaction((trans), __func__, \ - __LINE__, (errno), first); \ -} while (0) - -#ifdef CONFIG_PRINTK_INDEX - -#define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \ -do { \ - printk_index_subsys_emit( \ - "BTRFS: error (device %s%s) in %s:%d: errno=%d %s", \ - KERN_CRIT, fmt); \ - __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \ - (errno), fmt, ##args); \ -} while (0) - -#else - -#define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \ - __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \ - (errno), fmt, ##args) - -#endif - -#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))) - -__printf(5, 6) -__cold -void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function, - unsigned int line, int errno, const char *fmt, ...); -/* - * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic - * will panic(). Otherwise we BUG() here. - */ -#define btrfs_panic(fs_info, errno, fmt, args...) \ -do { \ - __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \ - BUG(); \ -} while (0) - - -/* compatibility and incompatibility defines */ - -#define btrfs_set_fs_incompat(__fs_info, opt) \ - __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \ - #opt) - -static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info, - u64 flag, const char* name) -{ - struct btrfs_super_block *disk_super; - u64 features; - - disk_super = fs_info->super_copy; - features = btrfs_super_incompat_flags(disk_super); - if (!(features & flag)) { - spin_lock(&fs_info->super_lock); - features = btrfs_super_incompat_flags(disk_super); - if (!(features & flag)) { - features |= flag; - btrfs_set_super_incompat_flags(disk_super, features); - btrfs_info(fs_info, - "setting incompat feature flag for %s (0x%llx)", - name, flag); - } - spin_unlock(&fs_info->super_lock); - } -} - -#define btrfs_clear_fs_incompat(__fs_info, opt) \ - __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \ - #opt) - -static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info, - u64 flag, const char* name) -{ - struct btrfs_super_block *disk_super; - u64 features; - - disk_super = fs_info->super_copy; - features = btrfs_super_incompat_flags(disk_super); - if (features & flag) { - spin_lock(&fs_info->super_lock); - features = btrfs_super_incompat_flags(disk_super); - if (features & flag) { - features &= ~flag; - btrfs_set_super_incompat_flags(disk_super, features); - btrfs_info(fs_info, - "clearing incompat feature flag for %s (0x%llx)", - name, flag); - } - spin_unlock(&fs_info->super_lock); - } -} - -#define btrfs_fs_incompat(fs_info, opt) \ - __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt) - -static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag) -{ - struct btrfs_super_block *disk_super; - disk_super = fs_info->super_copy; - return !!(btrfs_super_incompat_flags(disk_super) & flag); -} - -#define btrfs_set_fs_compat_ro(__fs_info, opt) \ - __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \ - #opt) - -static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info, - u64 flag, const char *name) -{ - struct btrfs_super_block *disk_super; - u64 features; - - disk_super = fs_info->super_copy; - features = btrfs_super_compat_ro_flags(disk_super); - if (!(features & flag)) { - spin_lock(&fs_info->super_lock); - features = btrfs_super_compat_ro_flags(disk_super); - if (!(features & flag)) { - features |= flag; - btrfs_set_super_compat_ro_flags(disk_super, features); - btrfs_info(fs_info, - "setting compat-ro feature flag for %s (0x%llx)", - name, flag); - } - spin_unlock(&fs_info->super_lock); - } -} - -#define btrfs_clear_fs_compat_ro(__fs_info, opt) \ - __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \ - #opt) - -static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info, - u64 flag, const char *name) -{ - struct btrfs_super_block *disk_super; - u64 features; - - disk_super = fs_info->super_copy; - features = btrfs_super_compat_ro_flags(disk_super); - if (features & flag) { - spin_lock(&fs_info->super_lock); - features = btrfs_super_compat_ro_flags(disk_super); - if (features & flag) { - features &= ~flag; - btrfs_set_super_compat_ro_flags(disk_super, features); - btrfs_info(fs_info, - "clearing compat-ro feature flag for %s (0x%llx)", - name, flag); - } - spin_unlock(&fs_info->super_lock); - } -} - -#define btrfs_fs_compat_ro(fs_info, opt) \ - __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) - -static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag) -{ - struct btrfs_super_block *disk_super; - disk_super = fs_info->super_copy; - return !!(btrfs_super_compat_ro_flags(disk_super) & flag); -} - -/* acl.c */ -#ifdef CONFIG_BTRFS_FS_POSIX_ACL -struct posix_acl *btrfs_get_acl(struct inode *inode, int type, bool rcu); -int btrfs_set_acl(struct user_namespace *mnt_userns, struct inode *inode, - struct posix_acl *acl, int type); -int __btrfs_set_acl(struct btrfs_trans_handle *trans, struct inode *inode, - struct posix_acl *acl, int type); -#else -#define btrfs_get_acl NULL -#define btrfs_set_acl NULL -static inline int __btrfs_set_acl(struct btrfs_trans_handle *trans, - struct inode *inode, struct posix_acl *acl, - int type) -{ - return -EOPNOTSUPP; -} -#endif - -/* relocation.c */ -int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start); -int btrfs_init_reloc_root(struct btrfs_trans_handle *trans, - struct btrfs_root *root); -int btrfs_update_reloc_root(struct btrfs_trans_handle *trans, - struct btrfs_root *root); -int btrfs_recover_relocation(struct btrfs_fs_info *fs_info); -int btrfs_reloc_clone_csums(struct btrfs_inode *inode, u64 file_pos, u64 len); -int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans, - struct btrfs_root *root, struct extent_buffer *buf, - struct extent_buffer *cow); -void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending, - u64 *bytes_to_reserve); -int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans, - struct btrfs_pending_snapshot *pending); -int btrfs_should_cancel_balance(struct btrfs_fs_info *fs_info); -struct btrfs_root *find_reloc_root(struct btrfs_fs_info *fs_info, - u64 bytenr); -int btrfs_should_ignore_reloc_root(struct btrfs_root *root); - -/* scrub.c */ -int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start, - u64 end, struct btrfs_scrub_progress *progress, - int readonly, int is_dev_replace); -void btrfs_scrub_pause(struct btrfs_fs_info *fs_info); -void btrfs_scrub_continue(struct btrfs_fs_info *fs_info); -int btrfs_scrub_cancel(struct btrfs_fs_info *info); -int btrfs_scrub_cancel_dev(struct btrfs_device *dev); -int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid, - struct btrfs_scrub_progress *progress); - -/* dev-replace.c */ -void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info); -void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount); - -static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info) -{ - btrfs_bio_counter_sub(fs_info, 1); -} static inline int is_fstree(u64 rootid) { @@ -4057,61 +695,16 @@ static inline int is_fstree(u64 rootid) return 0; } -static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info) -{ - return signal_pending(current); -} - -/* verity.c */ -#ifdef CONFIG_FS_VERITY - -extern const struct fsverity_operations btrfs_verityops; -int btrfs_drop_verity_items(struct btrfs_inode *inode); -int btrfs_get_verity_descriptor(struct inode *inode, void *buf, size_t buf_size); - -BTRFS_SETGET_FUNCS(verity_descriptor_encryption, struct btrfs_verity_descriptor_item, - encryption, 8); -BTRFS_SETGET_FUNCS(verity_descriptor_size, struct btrfs_verity_descriptor_item, - size, 64); -BTRFS_SETGET_STACK_FUNCS(stack_verity_descriptor_encryption, - struct btrfs_verity_descriptor_item, encryption, 8); -BTRFS_SETGET_STACK_FUNCS(stack_verity_descriptor_size, - struct btrfs_verity_descriptor_item, size, 64); - -#else - -static inline int btrfs_drop_verity_items(struct btrfs_inode *inode) -{ - return 0; -} - -static inline int btrfs_get_verity_descriptor(struct inode *inode, void *buf, - size_t buf_size) -{ - return -EPERM; -} - -#endif - -/* Sanity test specific functions */ -#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS -void btrfs_test_destroy_inode(struct inode *inode); -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 - static inline bool btrfs_is_data_reloc_root(const struct btrfs_root *root) { return root->root_key.objectid == BTRFS_DATA_RELOC_TREE_OBJECTID; } +int btrfs_super_csum_size(const struct btrfs_super_block *s); +const char *btrfs_super_csum_name(u16 csum_type); +const char *btrfs_super_csum_driver(u16 csum_type); +size_t __attribute_const__ btrfs_get_num_csums(void); + /* * We use page status Private2 to indicate there is an ordered extent with * unfinished IO. |