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Diffstat (limited to 'fs/btrfs/ctree.h')
| -rw-r--r-- | fs/btrfs/ctree.h | 3775 |
1 files changed, 3775 insertions, 0 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h new file mode 100644 index 000000000..4d1c12faa --- /dev/null +++ b/fs/btrfs/ctree.h @@ -0,0 +1,3775 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2007 Oracle. All rights reserved. + */ + +#ifndef BTRFS_CTREE_H +#define BTRFS_CTREE_H + +#include <linux/mm.h> +#include <linux/sched/signal.h> +#include <linux/highmem.h> +#include <linux/fs.h> +#include <linux/rwsem.h> +#include <linux/semaphore.h> +#include <linux/completion.h> +#include <linux/backing-dev.h> +#include <linux/wait.h> +#include <linux/slab.h> +#include <linux/kobject.h> +#include <trace/events/btrfs.h> +#include <asm/kmap_types.h> +#include <linux/pagemap.h> +#include <linux/btrfs.h> +#include <linux/btrfs_tree.h> +#include <linux/workqueue.h> +#include <linux/security.h> +#include <linux/sizes.h> +#include <linux/dynamic_debug.h> +#include <linux/refcount.h> +#include <linux/crc32c.h> +#include "extent_io.h" +#include "extent_map.h" +#include "async-thread.h" + +struct btrfs_trans_handle; +struct btrfs_transaction; +struct btrfs_pending_snapshot; +extern struct kmem_cache *btrfs_trans_handle_cachep; +extern struct kmem_cache *btrfs_bit_radix_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; + +#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS +#define STATIC noinline +#else +#define STATIC static noinline +#endif + +#define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */ + +#define BTRFS_MAX_MIRRORS 3 + +#define BTRFS_MAX_LEVEL 8 + +#define BTRFS_OLDEST_GENERATION 0ULL + +/* + * the max metadata block size. This limit is somewhat artificial, + * but the memmove costs go through the roof for larger blocks. + */ +#define BTRFS_MAX_METADATA_BLOCKSIZE 65536 + +/* + * 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 + +/* four bytes for CRC32 */ +static const int btrfs_csum_sizes[] = { 4 }; + +#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 + + +/* + * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size + */ +static inline u32 count_max_extents(u64 size) +{ + return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE); +} + +struct btrfs_mapping_tree { + struct extent_map_tree map_tree; +}; + +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); +} + +/* + * File system states + */ +#define BTRFS_FS_STATE_ERROR 0 +#define BTRFS_FS_STATE_REMOUNTING 1 +#define BTRFS_FS_STATE_TRANS_ABORTED 2 +#define BTRFS_FS_STATE_DEV_REPLACING 3 +#define BTRFS_FS_STATE_DUMMY_FS_INFO 4 + +#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__)); + +/* + * the super block basically lists the main trees of the FS + * it currently lacks any block count etc etc + */ +struct btrfs_super_block { + u8 csum[BTRFS_CSUM_SIZE]; + /* the first 4 fields must match struct btrfs_header */ + u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ + __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 will help find the new super based on the log root */ + __le64 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; + + /* future expansion */ + __le64 reserved[30]; + u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; + struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS]; +} __attribute__ ((__packed__)); + +/* + * 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) + +#define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL +#define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL + +#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) + +#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__)); + +/* + * btrfs_paths remember the path taken from the root down to the leaf. + * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point + * to any other levels that are present. + * + * The slots array records the index of the item or block pointer + * used while walking the tree. + */ +enum { READA_NONE = 0, READA_BACK, READA_FORWARD }; +struct btrfs_path { + struct extent_buffer *nodes[BTRFS_MAX_LEVEL]; + int slots[BTRFS_MAX_LEVEL]; + /* if there is real range locking, this locks field will change */ + u8 locks[BTRFS_MAX_LEVEL]; + u8 reada; + /* keep some upper locks as we walk down */ + u8 lowest_level; + + /* + * set by btrfs_split_item, tells search_slot to keep all locks + * and to force calls to keep space in the nodes + */ + unsigned int search_for_split:1; + unsigned int keep_locks:1; + unsigned int skip_locking:1; + unsigned int leave_spinning:1; + unsigned int search_commit_root:1; + unsigned int need_commit_sem:1; + unsigned int skip_release_on_error:1; +}; +#define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \ + sizeof(struct btrfs_item)) +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; + rwlock_t lock; + atomic_t read_locks; + atomic_t blocking_readers; + wait_queue_head_t read_lock_wq; + + struct btrfs_scrub_progress scrub_progress; +}; + +/* For raid type sysfs entries */ +struct raid_kobject { + u64 flags; + struct kobject kobj; + struct list_head list; +}; + +struct btrfs_space_info { + spinlock_t lock; + + u64 total_bytes; /* total bytes in the space, + this doesn't take mirrors into account */ + u64 bytes_used; /* total bytes used, + this doesn't take mirrors into account */ + u64 bytes_pinned; /* total bytes pinned, will be freed when the + transaction finishes */ + u64 bytes_reserved; /* total bytes the allocator has reserved for + current allocations */ + u64 bytes_may_use; /* number of bytes that may be used for + delalloc/allocations */ + u64 bytes_readonly; /* total bytes that are read only */ + + u64 max_extent_size; /* This will hold the maximum extent size of + the space info if we had an ENOSPC in the + allocator. */ + + unsigned int full:1; /* indicates that we cannot allocate any more + chunks for this space */ + unsigned int chunk_alloc:1; /* set if we are allocating a chunk */ + + unsigned int flush:1; /* set if we are trying to make space */ + + unsigned int force_alloc; /* set if we need to force a chunk + alloc for this space */ + + u64 disk_used; /* total bytes used on disk */ + u64 disk_total; /* total bytes on disk, takes mirrors into + account */ + + u64 flags; + + /* + * bytes_pinned is kept in line with what is actually pinned, as in + * we've called update_block_group and dropped the bytes_used counter + * and increased the bytes_pinned counter. However this means that + * bytes_pinned does not reflect the bytes that will be pinned once the + * delayed refs are flushed, so this counter is inc'ed every time we + * call btrfs_free_extent so it is a realtime count of what will be + * freed once the transaction is committed. It will be zeroed every + * time the transaction commits. + */ + struct percpu_counter total_bytes_pinned; + + struct list_head list; + /* Protected by the spinlock 'lock'. */ + struct list_head ro_bgs; + struct list_head priority_tickets; + struct list_head tickets; + /* + * tickets_id just indicates the next ticket will be handled, so note + * it's not stored per ticket. + */ + u64 tickets_id; + + struct rw_semaphore groups_sem; + /* for block groups in our same type */ + struct list_head block_groups[BTRFS_NR_RAID_TYPES]; + wait_queue_head_t wait; + + struct kobject kobj; + struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES]; +}; + +#define BTRFS_BLOCK_RSV_GLOBAL 1 +#define BTRFS_BLOCK_RSV_DELALLOC 2 +#define BTRFS_BLOCK_RSV_TRANS 3 +#define BTRFS_BLOCK_RSV_CHUNK 4 +#define BTRFS_BLOCK_RSV_DELOPS 5 +#define BTRFS_BLOCK_RSV_EMPTY 6 +#define BTRFS_BLOCK_RSV_TEMP 7 + +struct btrfs_block_rsv { + u64 size; + u64 reserved; + struct btrfs_space_info *space_info; + spinlock_t lock; + unsigned short full; + unsigned short type; + unsigned short failfast; + + /* + * Qgroup equivalent for @size @reserved + * + * Unlike normal @size/@reserved for inode rsv, qgroup doesn't care + * about things like csum size nor how many tree blocks it will need to + * reserve. + * + * Qgroup cares more about net change of the extent usage. + * + * So for one newly inserted file extent, in worst case it will cause + * leaf split and level increase, nodesize for each file extent is + * already too much. + * + * In short, qgroup_size/reserved is the upper limit of possible needed + * qgroup metadata reservation. + */ + u64 qgroup_rsv_size; + u64 qgroup_rsv_reserved; +}; + +/* + * 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_cache *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; +}; + +enum btrfs_caching_type { + BTRFS_CACHE_NO = 0, + BTRFS_CACHE_STARTED = 1, + BTRFS_CACHE_FAST = 2, + BTRFS_CACHE_FINISHED = 3, + BTRFS_CACHE_ERROR = 4, +}; + +enum btrfs_disk_cache_state { + BTRFS_DC_WRITTEN = 0, + BTRFS_DC_ERROR = 1, + BTRFS_DC_CLEAR = 2, + BTRFS_DC_SETUP = 3, +}; + +struct btrfs_caching_control { + struct list_head list; + struct mutex mutex; + wait_queue_head_t wait; + struct btrfs_work work; + struct btrfs_block_group_cache *block_group; + u64 progress; + refcount_t count; +}; + +/* Once caching_thread() finds this much free space, it will wake up waiters. */ +#define CACHING_CTL_WAKE_UP SZ_2M + +struct btrfs_io_ctl { + void *cur, *orig; + struct page *page; + struct page **pages; + struct btrfs_fs_info *fs_info; + struct inode *inode; + unsigned long size; + int index; + int num_pages; + int entries; + int bitmaps; + unsigned check_crcs:1; +}; + +/* + * Tree to record all locked full stripes of a RAID5/6 block group + */ +struct btrfs_full_stripe_locks_tree { + struct rb_root root; + struct mutex lock; +}; + +struct btrfs_block_group_cache { + struct btrfs_key key; + struct btrfs_block_group_item item; + struct btrfs_fs_info *fs_info; + struct inode *inode; + spinlock_t lock; + u64 pinned; + u64 reserved; + u64 delalloc_bytes; + u64 bytes_super; + u64 flags; + u64 cache_generation; + + /* + * If the free space extent count exceeds this number, convert the block + * group to bitmaps. + */ + u32 bitmap_high_thresh; + + /* + * If the free space extent count drops below this number, convert the + * block group back to extents. + */ + u32 bitmap_low_thresh; + + /* + * It is just used for the delayed data space allocation because + * only the data space allocation and the relative metadata update + * can be done cross the transaction. + */ + struct rw_semaphore data_rwsem; + + /* for raid56, this is a full stripe, without parity */ + unsigned long full_stripe_len; + + unsigned int ro; + unsigned int iref:1; + unsigned int has_caching_ctl:1; + unsigned int removed:1; + + int disk_cache_state; + + /* cache tracking stuff */ + int cached; + struct btrfs_caching_control *caching_ctl; + u64 last_byte_to_unpin; + + struct btrfs_space_info *space_info; + + /* free space cache stuff */ + struct btrfs_free_space_ctl *free_space_ctl; + + /* block group cache stuff */ + struct rb_node cache_node; + + /* for block groups in the same raid type */ + struct list_head list; + + /* usage count */ + atomic_t count; + + /* List of struct btrfs_free_clusters for this block group. + * Today it will only have one thing on it, but that may change + */ + struct list_head cluster_list; + + /* For delayed block group creation or deletion of empty block groups */ + struct list_head bg_list; + + /* For read-only block groups */ + struct list_head ro_list; + + atomic_t trimming; + + /* For dirty block groups */ + struct list_head dirty_list; + struct list_head io_list; + + struct btrfs_io_ctl io_ctl; + + /* + * Incremented when doing extent allocations and holding a read lock + * on the space_info's groups_sem semaphore. + * Decremented when an ordered extent that represents an IO against this + * block group's range is created (after it's added to its inode's + * root's list of ordered extents) or immediately after the allocation + * if it's a metadata extent or fallocate extent (for these cases we + * don't create ordered extents). + */ + atomic_t reservations; + + /* + * Incremented while holding the spinlock *lock* by a task checking if + * it can perform a nocow write (incremented if the value for the *ro* + * field is 0). Decremented by such tasks once they create an ordered + * extent or before that if some error happens before reaching that step. + * This is to prevent races between block group relocation and nocow + * writes through direct IO. + */ + atomic_t nocow_writers; + + /* Lock for free space tree operations. */ + struct mutex free_space_lock; + + /* + * Does the block group need to be added to the free space tree? + * Protected by free_space_lock. + */ + int needs_free_space; + + /* Record locked full stripes for RAID5/6 block group */ + struct btrfs_full_stripe_locks_tree full_stripe_locks_root; +}; + +/* delayed seq elem */ +struct seq_list { + struct list_head list; + u64 seq; +}; + +#define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 } + +#define SEQ_LAST ((u64)-1) + +enum btrfs_orphan_cleanup_state { + ORPHAN_CLEANUP_STARTED = 1, + ORPHAN_CLEANUP_DONE = 2, +}; + +/* used by the raid56 code to lock stripes for read/modify/write */ +struct btrfs_stripe_hash { + struct list_head hash_list; + spinlock_t lock; +}; + +/* used by the raid56 code to lock stripes for read/modify/write */ +struct btrfs_stripe_hash_table { + struct list_head stripe_cache; + spinlock_t cache_lock; + int cache_size; + struct btrfs_stripe_hash table[]; +}; + +#define BTRFS_STRIPE_HASH_TABLE_BITS 11 + +void btrfs_init_async_reclaim_work(struct work_struct *work); + +/* fs_info */ +struct reloc_control; +struct btrfs_device; +struct btrfs_fs_devices; +struct btrfs_balance_control; +struct btrfs_delayed_root; + +#define BTRFS_FS_BARRIER 1 +#define BTRFS_FS_CLOSING_START 2 +#define BTRFS_FS_CLOSING_DONE 3 +#define BTRFS_FS_LOG_RECOVERING 4 +#define BTRFS_FS_OPEN 5 +#define BTRFS_FS_QUOTA_ENABLED 6 +#define BTRFS_FS_UPDATE_UUID_TREE_GEN 9 +#define BTRFS_FS_CREATING_FREE_SPACE_TREE 10 +#define BTRFS_FS_BTREE_ERR 11 +#define BTRFS_FS_LOG1_ERR 12 +#define BTRFS_FS_LOG2_ERR 13 +#define BTRFS_FS_QUOTA_OVERRIDE 14 +/* Used to record internally whether fs has been frozen */ +#define BTRFS_FS_FROZEN 15 + +/* + * Indicate that a whole-filesystem exclusive operation is running + * (device replace, resize, device add/delete, balance) + */ +#define BTRFS_FS_EXCL_OP 16 + +/* + * To info transaction_kthread we need an immediate commit so it doesn't + * need to wait for commit_interval + */ +#define BTRFS_FS_NEED_ASYNC_COMMIT 17 + +/* + * Indicate that balance has been set up from the ioctl and is in the main + * phase. The fs_info::balance_ctl is initialized. + */ +#define BTRFS_FS_BALANCE_RUNNING 18 + +struct btrfs_fs_info { + u8 fsid[BTRFS_FSID_SIZE]; + u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; + unsigned long flags; + struct btrfs_root *extent_root; + struct btrfs_root *tree_root; + struct btrfs_root *chunk_root; + struct btrfs_root *dev_root; + struct btrfs_root *fs_root; + struct btrfs_root *csum_root; + struct btrfs_root *quota_root; + struct btrfs_root *uuid_root; + struct btrfs_root *free_space_root; + + /* the log root tree is a directory of all the other log roots */ + struct btrfs_root *log_root_tree; + + spinlock_t fs_roots_radix_lock; + struct radix_tree_root fs_roots_radix; + + /* block group cache stuff */ + spinlock_t block_group_cache_lock; + u64 first_logical_byte; + struct rb_root block_group_cache_tree; + + /* keep track of unallocated space */ + atomic64_t free_chunk_space; + + struct extent_io_tree freed_extents[2]; + struct extent_io_tree *pinned_extents; + + /* logical->physical extent mapping */ + struct btrfs_mapping_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; + + struct btrfs_block_rsv empty_block_rsv; + + u64 generation; + u64 last_trans_committed; + 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; + struct srcu_struct subvol_srcu; + + 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; + struct mutex cleaner_delayed_iput_mutex; + + 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 *delalloc_workers; + struct btrfs_workqueue *flush_workers; + struct btrfs_workqueue *endio_workers; + struct btrfs_workqueue *endio_meta_workers; + struct btrfs_workqueue *endio_raid56_workers; + struct btrfs_workqueue *endio_repair_workers; + struct btrfs_workqueue *rmw_workers; + struct btrfs_workqueue *endio_meta_write_workers; + struct btrfs_workqueue *endio_write_workers; + struct btrfs_workqueue *endio_freespace_worker; + struct btrfs_workqueue *submit_workers; + struct btrfs_workqueue *caching_workers; + struct btrfs_workqueue *readahead_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; + + /* the extent workers do delayed refs on the extent allocation tree */ + struct btrfs_workqueue *extent_workers; + struct task_struct *transaction_kthread; + struct task_struct *cleaner_kthread; + u32 thread_pool_size; + + struct kobject *space_info_kobj; + struct list_head pending_raid_kobjs; + spinlock_t pending_raid_kobjs_lock; /* uncontended */ + + u64 total_pinned; + + /* used to keep from writing metadata until there is a nice batch */ + struct percpu_counter dirty_metadata_bytes; + struct percpu_counter delalloc_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; + + 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; + int scrub_workers_refcnt; + struct btrfs_workqueue *scrub_workers; + struct btrfs_workqueue *scrub_wr_completion_workers; + struct btrfs_workqueue *scrub_nocow_workers; + struct btrfs_workqueue *scrub_parity_workers; + +#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; + struct rb_root qgroup_op_tree; + spinlock_t qgroup_lock; + spinlock_t qgroup_op_lock; + atomic_t qgroup_op_seq; + + /* + * 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 */ + 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 */ + + /* filesystem state */ + unsigned long fs_state; + + struct btrfs_delayed_root *delayed_root; + + /* readahead tree */ + spinlock_t reada_lock; + struct radix_tree_root reada_tree; + + /* readahead works cnt */ + atomic_t reada_works_cnt; + + /* Extent buffer radix tree */ + spinlock_t buffer_lock; + 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 percpu_counter bio_counter; + wait_queue_head_t replace_wait; + + struct semaphore uuid_tree_rescan_sem; + + /* Used to reclaim the metadata space in the background. */ + struct work_struct async_reclaim_work; + + spinlock_t unused_bgs_lock; + struct list_head unused_bgs; + struct mutex unused_bg_unpin_mutex; + struct mutex delete_unused_bgs_mutex; + + /* For btrfs to record security options */ + struct security_mnt_opts security_opts; + + /* + * Chunks that can't be freed yet (under a trim/discard operation) + * and will be latter freed. Protected by fs_info->chunk_mutex. + */ + struct list_head pinned_chunks; + + /* Cached block sizes */ + u32 nodesize; + u32 sectorsize; + u32 stripesize; + +#ifdef CONFIG_BTRFS_FS_REF_VERIFY + spinlock_t ref_verify_lock; + struct rb_root block_tree; +#endif +}; + +static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb) +{ + return sb->s_fs_info; +} + +struct btrfs_subvolume_writers { + struct percpu_counter counter; + wait_queue_head_t wait; +}; + +/* + * The state of btrfs root + */ +/* + * btrfs_record_root_in_trans is a multi-step process, + * and it can race with the balancing code. But the + * race is very small, and only the first time the root + * is added to each transaction. So IN_TRANS_SETUP + * is used to tell us when more checks are required + */ +#define BTRFS_ROOT_IN_TRANS_SETUP 0 +#define BTRFS_ROOT_REF_COWS 1 +#define BTRFS_ROOT_TRACK_DIRTY 2 +#define BTRFS_ROOT_IN_RADIX 3 +#define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 4 +#define BTRFS_ROOT_DEFRAG_RUNNING 5 +#define BTRFS_ROOT_FORCE_COW 6 +#define BTRFS_ROOT_MULTI_LOG_TASKS 7 +#define BTRFS_ROOT_DIRTY 8 + +/* + * in ram representation of the tree. extent_root is used for all allocations + * and for the extent tree extent_root root. + */ +struct btrfs_root { + struct extent_buffer *node; + + struct extent_buffer *commit_root; + struct btrfs_root *log_root; + struct btrfs_root *reloc_root; + + unsigned long state; + struct btrfs_root_item root_item; + struct btrfs_key root_key; + struct btrfs_fs_info *fs_info; + struct extent_io_tree dirty_log_pages; + + struct mutex objectid_mutex; + + spinlock_t accounting_lock; + struct btrfs_block_rsv *block_rsv; + + /* free ino cache stuff */ + struct btrfs_free_space_ctl *free_ino_ctl; + enum btrfs_caching_type ino_cache_state; + spinlock_t ino_cache_lock; + wait_queue_head_t ino_cache_wait; + struct btrfs_free_space_ctl *free_ino_pinned; + u64 ino_cache_progress; + struct inode *ino_cache_inode; + + struct mutex log_mutex; + wait_queue_head_t log_writer_wait; + wait_queue_head_t log_commit_wait[2]; + struct list_head log_ctxs[2]; + atomic_t log_writers; + atomic_t log_commit[2]; + atomic_t log_batch; + int log_transid; + /* No matter the commit succeeds or not*/ + int log_transid_committed; + /* Just be updated when the commit succeeds. */ + int last_log_commit; + pid_t log_start_pid; + + u64 objectid; + u64 last_trans; + + u32 type; + + u64 highest_objectid; + +#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS + /* only used with CONFIG_BTRFS_FS_RUN_SANITY_TESTS is enabled */ + u64 alloc_bytenr; +#endif + + u64 defrag_trans_start; + struct btrfs_key defrag_progress; + struct btrfs_key defrag_max; + + /* the dirty list is only used by non-reference counted roots */ + struct list_head dirty_list; + + struct list_head root_list; + + spinlock_t log_extents_lock[2]; + struct list_head logged_list[2]; + + int orphan_cleanup_state; + + spinlock_t inode_lock; + /* red-black tree that keeps track of in-memory inodes */ + struct rb_root inode_tree; + + /* + * radix tree that keeps track of delayed nodes of every inode, + * protected by inode_lock + */ + struct radix_tree_root delayed_nodes_tree; + /* + * right now this just gets used so that a root has its own devid + * for stat. It may be used for more later + */ + dev_t anon_dev; + + spinlock_t root_item_lock; + refcount_t refs; + + struct mutex delalloc_mutex; + spinlock_t delalloc_lock; + /* + * all of the inodes that have delalloc bytes. It is possible for + * this list to be empty even when there is still dirty data=ordered + * extents waiting to finish IO. + */ + struct list_head delalloc_inodes; + struct list_head delalloc_root; + u64 nr_delalloc_inodes; + + struct mutex ordered_extent_mutex; + /* + * this is used by the balancing code to wait for all the pending + * ordered extents + */ + spinlock_t ordered_extent_lock; + + /* + * all of the data=ordered extents pending writeback + * these can span multiple transactions and basically include + * every dirty data page that isn't from nodatacow + */ + struct list_head ordered_extents; + struct list_head ordered_root; + u64 nr_ordered_extents; + + /* + * Number of currently running SEND ioctls to prevent + * manipulation with the read-only status via SUBVOL_SETFLAGS + */ + int send_in_progress; + struct btrfs_subvolume_writers *subv_writers; + atomic_t will_be_snapshotted; + atomic_t snapshot_force_cow; + + /* For qgroup metadata reserved space */ + spinlock_t qgroup_meta_rsv_lock; + u64 qgroup_meta_rsv_pertrans; + u64 qgroup_meta_rsv_prealloc; +}; + +struct btrfs_file_private { + void *filldir_buf; +}; + +static inline u32 btrfs_inode_sectorsize(const struct inode *inode) +{ + return btrfs_sb(inode->i_sb)->sectorsize; +} + +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); +} + +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() + */ +#define BTRFS_MOUNT_NODATASUM (1 << 0) +#define BTRFS_MOUNT_NODATACOW (1 << 1) +#define BTRFS_MOUNT_NOBARRIER (1 << 2) +#define BTRFS_MOUNT_SSD (1 << 3) +#define BTRFS_MOUNT_DEGRADED (1 << 4) +#define BTRFS_MOUNT_COMPRESS (1 << 5) +#define BTRFS_MOUNT_NOTREELOG (1 << 6) +#define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7) +#define BTRFS_MOUNT_SSD_SPREAD (1 << 8) +#define BTRFS_MOUNT_NOSSD (1 << 9) +#define BTRFS_MOUNT_DISCARD (1 << 10) +#define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11) +#define BTRFS_MOUNT_SPACE_CACHE (1 << 12) +#define BTRFS_MOUNT_CLEAR_CACHE (1 << 13) +#define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14) +#define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15) +#define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16) +#define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17) +#define BTRFS_MOUNT_USEBACKUPROOT (1 << 18) +#define BTRFS_MOUNT_SKIP_BALANCE (1 << 19) +#define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20) +#define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21) +#define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22) +#define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23) +#define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24) +#define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25) +#define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26) +#define BTRFS_MOUNT_NOLOGREPLAY (1 << 27) +#define BTRFS_MOUNT_REF_VERIFY (1 << 28) + +#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...) \ +{ \ + if (!btrfs_test_opt(fs_info, opt)) \ + btrfs_info(fs_info, fmt, ##args); \ + btrfs_set_opt(fs_info->mount_opt, opt); \ +} + +#define btrfs_clear_and_info(fs_info, opt, fmt, args...) \ +{ \ + if (btrfs_test_opt(fs_info, opt)) \ + btrfs_info(fs_info, fmt, ##args); \ + btrfs_clear_opt(fs_info->mount_opt, opt); \ +} + +#ifdef CONFIG_BTRFS_DEBUG +static inline int +btrfs_should_fragment_free_space(struct btrfs_block_group_cache *block_group) +{ + struct btrfs_fs_info *fs_info = block_group->fs_info; + + return (btrfs_test_opt(fs_info, FRAGMENT_METADATA) && + block_group->flags & BTRFS_BLOCK_GROUP_METADATA) || + (btrfs_test_opt(fs_info, FRAGMENT_DATA) && + block_group->flags & BTRFS_BLOCK_GROUP_DATA); +} +#endif + +/* + * 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_SET_INODE_MAP_CACHE (0) +#define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1) +#define BTRFS_PENDING_COMMIT (2) + +#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 (1 << 0) +#define BTRFS_INODE_NODATACOW (1 << 1) +#define BTRFS_INODE_READONLY (1 << 2) +#define BTRFS_INODE_NOCOMPRESS (1 << 3) +#define BTRFS_INODE_PREALLOC (1 << 4) +#define BTRFS_INODE_SYNC (1 << 5) +#define BTRFS_INODE_IMMUTABLE (1 << 6) +#define BTRFS_INODE_APPEND (1 << 7) +#define BTRFS_INODE_NODUMP (1 << 8) +#define BTRFS_INODE_NOATIME (1 << 9) +#define BTRFS_INODE_DIRSYNC (1 << 10) +#define BTRFS_INODE_COMPRESS (1 << 11) + +#define BTRFS_INODE_ROOT_ITEM_INIT (1 << 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) + +struct btrfs_map_token { + const struct extent_buffer *eb; + char *kaddr; + unsigned long offset; +}; + +#define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \ + ((bytes) >> (fs_info)->sb->s_blocksize_bits) + +static inline void btrfs_init_map_token (struct btrfs_map_token *token) +{ + token->kaddr = NULL; +} + +/* 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 + +#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(const struct extent_buffer *eb, \ + const void *ptr, unsigned long off, \ + struct btrfs_map_token *token); \ +void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr, \ + unsigned long off, u##bits val, \ + struct btrfs_map_token *token); \ +static inline u##bits btrfs_get_##bits(const struct extent_buffer *eb, \ + const void *ptr, \ + unsigned long off) \ +{ \ + return btrfs_get_token_##bits(eb, ptr, off, NULL); \ +} \ +static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr,\ + unsigned long off, u##bits val) \ +{ \ + btrfs_set_token_##bits(eb, ptr, off, val, NULL); \ +} + +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) \ +{ \ + BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ + return btrfs_get_##bits(eb, s, offsetof(type, member)); \ +} \ +static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \ + u##bits val) \ +{ \ + BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ + btrfs_set_##bits(eb, s, offsetof(type, member), val); \ +} \ +static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\ + const type *s, \ + struct btrfs_map_token *token) \ +{ \ + BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ + return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \ +} \ +static inline void btrfs_set_token_##name(struct extent_buffer *eb, \ + type *s, u##bits val, \ + struct btrfs_map_token *token) \ +{ \ + BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ + btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \ +} + +#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]); \ + u##bits res = le##bits##_to_cpu(p->member); \ + return res; \ +} \ +static inline void btrfs_set_##name(struct extent_buffer *eb, \ + u##bits val) \ +{ \ + type *p = page_address(eb->pages[0]); \ + p->member = cpu_to_le##bits(val); \ +} + +#define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ +static inline u##bits btrfs_##name(const type *s) \ +{ \ + return le##bits##_to_cpu(s->member); \ +} \ +static inline void btrfs_set_##name(type *s, u##bits val) \ +{ \ + s->member = cpu_to_le##bits(val); \ +} + + +static inline u64 btrfs_device_total_bytes(struct extent_buffer *eb, + struct btrfs_dev_item *s) +{ + BUILD_BUG_ON(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(struct extent_buffer *eb, + struct btrfs_dev_item *s, + u64 val) +{ + BUILD_BUG_ON(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(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(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(block_group_used, struct btrfs_block_group_item, + used, 64); +BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item, + used, 64); +BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid, + struct btrfs_block_group_item, chunk_objectid, 64); + +BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid, + struct btrfs_block_group_item, chunk_objectid, 64); +BTRFS_SETGET_FUNCS(disk_block_group_flags, + struct btrfs_block_group_item, flags, 64); +BTRFS_SETGET_STACK_FUNCS(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); + +static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev) +{ + unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid); + return (unsigned long)dev + ptr; +} + +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(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32); + + +BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8); + +static inline void btrfs_tree_block_key(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(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; +} + +BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64); +BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0, + generation, 64); +BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64); +BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32); + +/* 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(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(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(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(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(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(item_offset, struct btrfs_item, offset, 32); +BTRFS_SETGET_FUNCS(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); +} + +static inline u32 btrfs_item_end(const struct extent_buffer *eb, + struct btrfs_item *item) +{ + return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); +} + +static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr) +{ + return btrfs_item_end(eb, btrfs_item_nr(nr)); +} + +static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr) +{ + return btrfs_item_offset(eb, btrfs_item_nr(nr)); +} + +static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr) +{ + return btrfs_item_size(eb, btrfs_item_nr(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); + +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); +} + +static inline u8 btrfs_key_type(const struct btrfs_key *key) +{ + return key->type; +} + +static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val) +{ + key->type = val; +} + +/* 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 int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) +{ + u64 flags = btrfs_header_flags(eb); + btrfs_set_header_flags(eb, flags | flag); + return (flags & flag) == flag; +} + +static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) +{ + u64 flags = btrfs_header_flags(eb); + btrfs_set_header_flags(eb, flags & ~flag); + return (flags & flag) == 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 unsigned long btrfs_header_fsid(void) +{ + return offsetof(struct btrfs_header, fsid); +} + +static inline unsigned long btrfs_header_chunk_tree_uuid(const struct extent_buffer *eb) +{ + return offsetof(struct btrfs_header, chunk_tree_uuid); +} + +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_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) +{ + return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0; +} + +static inline bool btrfs_root_dead(const struct btrfs_root *root) +{ + return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0; +} + +/* 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_transid, struct btrfs_super_block, + log_root_transid, 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); + +static inline int btrfs_super_csum_size(const struct btrfs_super_block *s) +{ + u16 t = btrfs_super_csum_type(s); + /* + * csum type is validated at mount time + */ + return btrfs_csum_sizes[t]; +} + + +/* + * 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 btrfs_fs_info *fs_info, + const struct extent_buffer *leaf) +{ + u32 nr = btrfs_header_nritems(leaf); + + if (nr == 0) + return BTRFS_LEAF_DATA_SIZE(fs_info); + return btrfs_item_offset_nr(leaf, nr - 1); +} + +/* struct btrfs_file_extent_item */ +BTRFS_SETGET_FUNCS(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_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_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, + struct btrfs_item *e) +{ + return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START; +} + +/* btrfs_dev_stats_item */ +static inline u64 btrfs_dev_stats_value(const struct extent_buffer *eb, + const struct btrfs_dev_stats_item *ptr, + int index) +{ + u64 val; + + read_extent_buffer(eb, &val, + offsetof(struct btrfs_dev_stats_item, values) + + ((unsigned long)ptr) + (index * sizeof(u64)), + sizeof(val)); + return val; +} + +static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb, + struct btrfs_dev_stats_item *ptr, + int index, u64 val) +{ + write_extent_buffer(eb, &val, + offsetof(struct btrfs_dev_stats_item, values) + + ((unsigned long)ptr) + (index * sizeof(u64)), + sizeof(val)); +} + +/* 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_nr(leaf, slot))) + +#define btrfs_item_ptr_offset(leaf, slot) \ + ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \ + btrfs_item_offset_nr(leaf, slot))) + +static inline u64 btrfs_name_hash(const char *name, int len) +{ + return crc32c((u32)~1, name, len); +} + +/* + * Figure the key offset of an extended inode ref + */ +static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name, + int len) +{ + return (u64) crc32c(parent_objectid, name, len); +} + +static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info) +{ + return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) && + (space_info->flags & BTRFS_BLOCK_GROUP_DATA)); +} + +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 = 0, + BTRFS_REF_TYPE_BLOCK = 1, + BTRFS_REF_TYPE_DATA = 2, + BTRFS_REF_TYPE_ANY = 3, +}; + +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 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes); + +static inline u64 btrfs_calc_trans_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 won't result in new nodes or leaves, just what we need for + * COW. + */ +static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_fs_info *fs_info, + unsigned num_items) +{ + return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items; +} + +int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans, + struct btrfs_fs_info *fs_info); +int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans, + struct btrfs_fs_info *fs_info); +void btrfs_dec_block_group_reservations(struct btrfs_fs_info *fs_info, + const u64 start); +void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache *bg); +bool btrfs_inc_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr); +void btrfs_dec_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr); +void btrfs_wait_nocow_writers(struct btrfs_block_group_cache *bg); +void btrfs_put_block_group(struct btrfs_block_group_cache *cache); +int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, + unsigned long count); +int btrfs_async_run_delayed_refs(struct btrfs_fs_info *fs_info, + unsigned long count, u64 transid, int wait); +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_fs_info *fs_info, + u64 bytenr, u64 num, int reserved); +int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info, + u64 bytenr, u64 num_bytes); +int btrfs_exclude_logged_extents(struct btrfs_fs_info *fs_info, + struct extent_buffer *eb); +int btrfs_cross_ref_exist(struct btrfs_root *root, + u64 objectid, u64 offset, u64 bytenr); +struct btrfs_block_group_cache *btrfs_lookup_block_group( + struct btrfs_fs_info *info, + u64 bytenr); +void btrfs_get_block_group(struct btrfs_block_group_cache *cache); +void btrfs_put_block_group(struct btrfs_block_group_cache *cache); +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); +void btrfs_free_tree_block(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + 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 btrfs_fs_info *fs_info, + u64 bytenr, u64 num_bytes, u64 flags, + int level, int is_data); +int btrfs_free_extent(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid, + u64 owner, u64 offset); + +int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info, + u64 start, u64 len, int delalloc); +int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info *fs_info, + u64 start, u64 len); +void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info); +int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans); +int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + u64 bytenr, u64 num_bytes, u64 parent, + u64 root_objectid, u64 owner, u64 offset); + +int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans); +int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, + struct btrfs_fs_info *fs_info); +int btrfs_setup_space_cache(struct btrfs_trans_handle *trans, + struct btrfs_fs_info *fs_info); +int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr); +int btrfs_free_block_groups(struct btrfs_fs_info *info); +int btrfs_read_block_groups(struct btrfs_fs_info *info); +int btrfs_can_relocate(struct btrfs_fs_info *fs_info, u64 bytenr); +int btrfs_make_block_group(struct btrfs_trans_handle *trans, + u64 bytes_used, u64 type, u64 chunk_offset, + u64 size); +void btrfs_add_raid_kobjects(struct btrfs_fs_info *fs_info); +struct btrfs_trans_handle *btrfs_start_trans_remove_block_group( + struct btrfs_fs_info *fs_info, + const u64 chunk_offset); +int btrfs_remove_block_group(struct btrfs_trans_handle *trans, + u64 group_start, struct extent_map *em); +void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info); +void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache); +void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache); +void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans); +u64 btrfs_data_alloc_profile(struct btrfs_fs_info *fs_info); +u64 btrfs_metadata_alloc_profile(struct btrfs_fs_info *fs_info); +u64 btrfs_system_alloc_profile(struct btrfs_fs_info *fs_info); +void btrfs_clear_space_info_full(struct btrfs_fs_info *info); + +enum btrfs_reserve_flush_enum { + /* If we are in the transaction, we can't flush anything.*/ + BTRFS_RESERVE_NO_FLUSH, + /* + * Flushing delalloc may cause deadlock somewhere, in this + * case, use FLUSH LIMIT + */ + BTRFS_RESERVE_FLUSH_LIMIT, + BTRFS_RESERVE_FLUSH_ALL, +}; + +enum btrfs_flush_state { + FLUSH_DELAYED_ITEMS_NR = 1, + FLUSH_DELAYED_ITEMS = 2, + FLUSH_DELALLOC = 3, + FLUSH_DELALLOC_WAIT = 4, + ALLOC_CHUNK = 5, + COMMIT_TRANS = 6, +}; + +int btrfs_alloc_data_chunk_ondemand(struct btrfs_inode *inode, u64 bytes); +int btrfs_check_data_free_space(struct inode *inode, + struct extent_changeset **reserved, u64 start, u64 len); +void btrfs_free_reserved_data_space(struct inode *inode, + struct extent_changeset *reserved, u64 start, u64 len); +void btrfs_delalloc_release_space(struct inode *inode, + struct extent_changeset *reserved, + u64 start, u64 len, bool qgroup_free); +void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start, + u64 len); +void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans); +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_fs_info *fs_info, + 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); +void btrfs_delalloc_release_metadata(struct btrfs_inode *inode, u64 num_bytes, + bool qgroup_free); +int btrfs_delalloc_reserve_space(struct inode *inode, + struct extent_changeset **reserved, u64 start, u64 len); +void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type); +struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_fs_info *fs_info, + unsigned short type); +void btrfs_init_metadata_block_rsv(struct btrfs_fs_info *fs_info, + struct btrfs_block_rsv *rsv, + unsigned short type); +void btrfs_free_block_rsv(struct btrfs_fs_info *fs_info, + struct btrfs_block_rsv *rsv); +int btrfs_block_rsv_add(struct btrfs_root *root, + struct btrfs_block_rsv *block_rsv, u64 num_bytes, + enum btrfs_reserve_flush_enum flush); +int btrfs_block_rsv_check(struct btrfs_block_rsv *block_rsv, int min_factor); +int btrfs_block_rsv_refill(struct btrfs_root *root, + struct btrfs_block_rsv *block_rsv, u64 min_reserved, + enum btrfs_reserve_flush_enum flush); +int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv, + struct btrfs_block_rsv *dst_rsv, u64 num_bytes, + int update_size); +int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info, + struct btrfs_block_rsv *dest, u64 num_bytes, + int min_factor); +void btrfs_block_rsv_release(struct btrfs_fs_info *fs_info, + struct btrfs_block_rsv *block_rsv, + u64 num_bytes); +int btrfs_inc_block_group_ro(struct btrfs_block_group_cache *cache); +void btrfs_dec_block_group_ro(struct btrfs_block_group_cache *cache); +void btrfs_put_block_group_cache(struct btrfs_fs_info *info); +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_force_chunk_alloc(struct btrfs_trans_handle *trans, u64 type); +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); +void check_system_chunk(struct btrfs_trans_handle *trans, const u64 type); +u64 add_new_free_space(struct btrfs_block_group_cache *block_group, + u64 start, u64 end); +void btrfs_mark_bg_unused(struct btrfs_block_group_cache *bg); + +/* ctree.c */ +int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key, + int level, int *slot); +int btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2); +int btrfs_previous_item(struct btrfs_root *root, + struct btrfs_path *path, u64 min_objectid, + int type); +int btrfs_previous_extent_item(struct btrfs_root *root, + struct btrfs_path *path, u64 min_objectid); +void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info, + struct btrfs_path *path, + const struct btrfs_key *new_key); +struct extent_buffer *btrfs_root_node(struct btrfs_root *root); +struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root); +struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root); +int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path, + struct btrfs_key *key, int lowest_level, + u64 min_trans); +int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key, + struct btrfs_path *path, + u64 min_trans); +enum btrfs_compare_tree_result { + BTRFS_COMPARE_TREE_NEW, + BTRFS_COMPARE_TREE_DELETED, + BTRFS_COMPARE_TREE_CHANGED, + BTRFS_COMPARE_TREE_SAME, +}; +typedef int (*btrfs_changed_cb_t)(struct btrfs_path *left_path, + struct btrfs_path *right_path, + struct btrfs_key *key, + enum btrfs_compare_tree_result result, + void *ctx); +int btrfs_compare_trees(struct btrfs_root *left_root, + struct btrfs_root *right_root, + btrfs_changed_cb_t cb, void *ctx); +int btrfs_cow_block(struct btrfs_trans_handle *trans, + struct btrfs_root *root, struct extent_buffer *buf, + struct extent_buffer *parent, int parent_slot, + struct extent_buffer **cow_ret); +int btrfs_copy_root(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + struct extent_buffer *buf, + struct extent_buffer **cow_ret, u64 new_root_objectid); +int btrfs_block_can_be_shared(struct btrfs_root *root, + struct extent_buffer *buf); +void btrfs_extend_item(struct btrfs_fs_info *fs_info, struct btrfs_path *path, + u32 data_size); +void btrfs_truncate_item(struct btrfs_fs_info *fs_info, + struct btrfs_path *path, u32 new_size, int from_end); +int btrfs_split_item(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + struct btrfs_path *path, + const struct btrfs_key *new_key, + unsigned long split_offset); +int btrfs_duplicate_item(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + struct btrfs_path *path, + const struct btrfs_key *new_key); +int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path, + u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key); +int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root, + const struct btrfs_key *key, struct btrfs_path *p, + int ins_len, int cow); +int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key, + struct btrfs_path *p, u64 time_seq); +int btrfs_search_slot_for_read(struct btrfs_root *root, + const struct btrfs_key *key, + struct btrfs_path *p, int find_higher, + int return_any); +int btrfs_realloc_node(struct btrfs_trans_handle *trans, + struct btrfs_root *root, struct extent_buffer *parent, + int start_slot, u64 *last_ret, + struct btrfs_key *progress); +void btrfs_release_path(struct btrfs_path *p); +struct btrfs_path *btrfs_alloc_path(void); +void btrfs_free_path(struct btrfs_path *p); +void btrfs_set_path_blocking(struct btrfs_path *p); +void btrfs_clear_path_blocking(struct btrfs_path *p, + struct extent_buffer *held, int held_rw); +void btrfs_unlock_up_safe(struct btrfs_path *p, int level); + +int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, + struct btrfs_path *path, int slot, int nr); +static inline int btrfs_del_item(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + struct btrfs_path *path) +{ + return btrfs_del_items(trans, root, path, path->slots[0], 1); +} + +void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path, + const struct btrfs_key *cpu_key, u32 *data_size, + u32 total_data, u32 total_size, int nr); +int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, + const struct btrfs_key *key, void *data, u32 data_size); +int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + struct btrfs_path *path, + const struct btrfs_key *cpu_key, u32 *data_size, + int nr); + +static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + struct btrfs_path *path, + const struct btrfs_key *key, + u32 data_size) +{ + return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); +} + +int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); +int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); +int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path, + u64 time_seq); +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; +} +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 btrfs_fs_info *fs_info, + struct extent_buffer *leaf); +int __must_check btrfs_drop_snapshot(struct btrfs_root *root, + struct btrfs_block_rsv *block_rsv, + 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. + */ +static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info) +{ + return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info); +} + +static inline void free_fs_info(struct btrfs_fs_info *fs_info) +{ + kfree(fs_info->balance_ctl); + kfree(fs_info->delayed_root); + kfree(fs_info->extent_root); + kfree(fs_info->tree_root); + kfree(fs_info->chunk_root); + kfree(fs_info->dev_root); + kfree(fs_info->csum_root); + kfree(fs_info->quota_root); + kfree(fs_info->uuid_root); + kfree(fs_info->free_space_root); + kfree(fs_info->super_copy); + kfree(fs_info->super_for_commit); + security_free_mnt_opts(&fs_info->security_opts); + kvfree(fs_info); +} + +/* tree mod log functions from ctree.c */ +u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info, + struct seq_list *elem); +void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info, + struct seq_list *elem); +int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq); + +/* 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, + int (*check_func)(struct btrfs_fs_info *, u8 *, u8, + u64)); + +/* 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, + struct btrfs_root *root, 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 objectid, 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); + +/* inode-item.c */ +int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + const char *name, int name_len, + u64 inode_objectid, u64 ref_objectid, u64 index); +int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + const char *name, int name_len, + u64 inode_objectid, u64 ref_objectid, u64 *index); +int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + struct btrfs_path *path, u64 objectid); +int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root + *root, struct btrfs_path *path, + struct btrfs_key *location, int mod); + +struct btrfs_inode_extref * +btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + struct btrfs_path *path, + const char *name, int name_len, + u64 inode_objectid, u64 ref_objectid, int ins_len, + int cow); + +int btrfs_find_name_in_backref(struct extent_buffer *leaf, int slot, + const char *name, + int name_len, struct btrfs_inode_ref **ref_ret); +int btrfs_find_name_in_ext_backref(struct extent_buffer *leaf, int slot, + u64 ref_objectid, const char *name, + int name_len, + struct btrfs_inode_extref **extref_ret); + +/* file-item.c */ +struct btrfs_dio_private; +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, u32 *dst); +blk_status_t btrfs_lookup_bio_sums_dio(struct inode *inode, struct bio *bio, + u64 logical_offset); +int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + u64 objectid, u64 pos, + u64 disk_offset, u64 disk_num_bytes, + u64 num_bytes, u64 offset, u64 ram_bytes, + u8 compression, u8 encryption, u16 other_encoding); +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 inode *inode, struct bio *bio, + u64 file_start, int contig); +int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, + struct list_head *list, int search_commit); +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); + +/* inode.c */ +struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode, + struct page *page, size_t pg_offset, u64 start, + u64 len, int create); +noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len, + u64 *orig_start, u64 *orig_block_len, + u64 *ram_bytes); + +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_root *root, + 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 inode *inode, loff_t from, loff_t len, + int front); +int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + struct inode *inode, u64 new_size, + u32 min_type); + +int btrfs_start_delalloc_snapshot(struct btrfs_root *root); +int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int nr); +int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end, + unsigned int extra_bits, + struct extent_state **cached_state, int dedupe); +int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, + struct btrfs_root *new_root, + struct btrfs_root *parent_root, + u64 new_dirid); +int btrfs_merge_bio_hook(struct page *page, unsigned long offset, + size_t size, struct bio *bio, + unsigned long bio_flags); +void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end); +vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf); +int btrfs_readpage(struct file *file, struct page *page); +void btrfs_evict_inode(struct inode *inode); +int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc); +struct inode *btrfs_alloc_inode(struct super_block *sb); +void btrfs_destroy_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, struct btrfs_key *location, + struct btrfs_root *root, int *new, + struct btrfs_path *path); +struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location, + struct btrfs_root *root, int *was_new); +struct extent_map *btrfs_get_extent(struct btrfs_inode *inode, + struct page *page, size_t pg_offset, + u64 start, u64 end, int create); +int btrfs_update_inode(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + struct inode *inode); +int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans, + struct btrfs_root *root, struct 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 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_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(void *private_data, struct page *locked_page, + u64 start, u64 end, int *page_started, unsigned long *nr_written, + struct writeback_control *wbc); +extern const struct dentry_operations btrfs_dentry_operations; +#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS +void btrfs_test_inode_set_ops(struct inode *inode); +#endif + +/* 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_ioctl_get_supported_features(void __user *arg); +void btrfs_sync_inode_flags_to_i_flags(struct inode *inode); +int btrfs_is_empty_uuid(u8 *uuid); +int btrfs_defrag_file(struct inode *inode, struct file *file, + struct btrfs_ioctl_defrag_range_args *range, + u64 newer_than, unsigned long max_pages); +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); +int btrfs_dedupe_file_range(struct file *src_file, loff_t src_loff, + struct file *dst_file, loff_t dst_loff, + u64 olen); + +/* 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); +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); +void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end, + int skip_pinned); +extern const struct file_operations btrfs_file_operations; +int __btrfs_drop_extents(struct btrfs_trans_handle *trans, + struct btrfs_root *root, struct inode *inode, + struct btrfs_path *path, u64 start, u64 end, + u64 *drop_end, int drop_cache, + int replace_extent, + u32 extent_item_size, + int *key_inserted); +int btrfs_drop_extents(struct btrfs_trans_handle *trans, + struct btrfs_root *root, struct inode *inode, u64 start, + u64 end, int drop_cache); +int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, + struct btrfs_inode *inode, u64 start, u64 end); +int btrfs_release_file(struct inode *inode, struct file *file); +int btrfs_dirty_pages(struct inode *inode, struct page **pages, + size_t num_pages, loff_t pos, size_t write_bytes, + struct extent_state **cached); +int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end); +int btrfs_clone_file_range(struct file *file_in, loff_t pos_in, + struct file *file_out, loff_t pos_out, u64 len); + +/* tree-defrag.c */ +int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, + struct btrfs_root *root); + +/* sysfs.c */ +int __init btrfs_init_sysfs(void); +void __cold btrfs_exit_sysfs(void); +int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info); +void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info); + +/* 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 +__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...) \ +do { \ + DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ + if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ + btrfs_printk(fs_info, KERN_DEBUG fmt, ##args); \ +} while (0) +#define btrfs_debug_in_rcu(fs_info, fmt, args...) \ +do { \ + DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ + if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ + btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args); \ +} while (0) +#define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ +do { \ + DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ + if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ + btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, \ + ##args);\ +} while (0) +#define btrfs_debug_rl(fs_info, fmt, args...) \ +do { \ + DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ + if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ + btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, \ + ##args); \ +} while (0) +#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 +static inline void assfail(const char *expr, const char *file, int line) +{ + pr_err("assertion failed: %s, file: %s, line: %d\n", + expr, file, line); + BUG(); +} + +#define ASSERT(expr) \ + (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__)) +#else +#define ASSERT(expr) ((void)0) +#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 *btrfs_decode_error(int errno); + +__cold +void __btrfs_abort_transaction(struct btrfs_trans_handle *trans, + const char *function, + unsigned int line, int errno); + +/* + * Call btrfs_abort_transaction as early as possible when an error condition is + * detected, that way the exact line number is reported. + */ +#define btrfs_abort_transaction(trans, errno) \ +do { \ + /* Report first abort since mount */ \ + if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \ + &((trans)->fs_info->fs_state))) { \ + if ((errno) != -EIO) { \ + WARN(1, KERN_DEBUG \ + "BTRFS: Transaction aborted (error %d)\n", \ + (errno)); \ + } else { \ + btrfs_debug((trans)->fs_info, \ + "Transaction aborted (error %d)", \ + (errno)); \ + } \ + } \ + __btrfs_abort_transaction((trans), __func__, \ + __LINE__, (errno)); \ +} while (0) + +#define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \ +do { \ + __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \ + (errno), fmt, ##args); \ +} while (0) + +__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) + +static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info, + u64 flag) +{ + 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 %llu feature flag", + 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) + +static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info, + u64 flag) +{ + 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 %llu feature flag", + 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) + +static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info, + u64 flag) +{ + 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 %llu ro feature flag", + 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) + +static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info, + u64 flag) +{ + 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 %llu ro feature flag", + 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); +int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type); +int btrfs_init_acl(struct btrfs_trans_handle *trans, + struct inode *inode, struct inode *dir); +#else +#define btrfs_get_acl NULL +#define btrfs_set_acl NULL +static inline int btrfs_init_acl(struct btrfs_trans_handle *trans, + struct inode *inode, struct inode *dir) +{ + return 0; +} +#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_root *root); +int btrfs_reloc_clone_csums(struct 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); + +/* 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_fs_info *info, + struct btrfs_device *dev); +int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid, + struct btrfs_scrub_progress *progress); +static inline void btrfs_init_full_stripe_locks_tree( + struct btrfs_full_stripe_locks_tree *locks_root) +{ + locks_root->root = RB_ROOT; + mutex_init(&locks_root->lock); +} + +/* dev-replace.c */ +void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info); +void btrfs_bio_counter_inc_noblocked(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); +} + +/* reada.c */ +struct reada_control { + struct btrfs_fs_info *fs_info; /* tree to prefetch */ + struct btrfs_key key_start; + struct btrfs_key key_end; /* exclusive */ + atomic_t elems; + struct kref refcnt; + wait_queue_head_t wait; +}; +struct reada_control *btrfs_reada_add(struct btrfs_root *root, + struct btrfs_key *start, struct btrfs_key *end); +int btrfs_reada_wait(void *handle); +void btrfs_reada_detach(void *handle); +int btree_readahead_hook(struct extent_buffer *eb, int err); + +static inline int is_fstree(u64 rootid) +{ + if (rootid == BTRFS_FS_TREE_OBJECTID || + ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID && + !btrfs_qgroup_level(rootid))) + return 1; + return 0; +} + +static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info) +{ + return signal_pending(current); +} + +/* Sanity test specific functions */ +#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS +void btrfs_test_destroy_inode(struct inode *inode); +#endif + +static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) +{ +#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS + if (unlikely(test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, + &fs_info->fs_state))) + return 1; +#endif + return 0; +} + +static inline void cond_wake_up(struct wait_queue_head *wq) +{ + /* + * This implies a full smp_mb barrier, see comments for + * waitqueue_active why. + */ + if (wq_has_sleeper(wq)) + wake_up(wq); +} + +static inline void cond_wake_up_nomb(struct wait_queue_head *wq) +{ + /* + * Special case for conditional wakeup where the barrier required for + * waitqueue_active is implied by some of the preceding code. Eg. one + * of such atomic operations (atomic_dec_and_return, ...), or a + * unlock/lock sequence, etc. + */ + if (waitqueue_active(wq)) + wake_up(wq); +} + +#endif |