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btrfs: move btrfs_fs_info declarations into fs.h
Now that we have a lot of the fs_info related helpers and stuff isolated, copy these over to fs.h out of ctree.h. Signed-off-by: Josef Bacik <josef@toxicpanda.com> Reviewed-by: David Sterba <dsterba@suse.com> [ reformat comments ] Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Josef Bacik
David Sterba
parent
94a48aef49
commit
a56159d408
659
fs/btrfs/ctree.h
659
fs/btrfs/ctree.h
@ -36,6 +36,7 @@
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#include "block-rsv.h"
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#include "locking.h"
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#include "misc.h"
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#include "fs.h"
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struct btrfs_trans_handle;
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struct btrfs_transaction;
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@ -53,14 +54,6 @@ struct btrfs_balance_control;
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struct btrfs_delayed_root;
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struct reloc_control;
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#define BTRFS_OLDEST_GENERATION 0ULL
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#define BTRFS_EMPTY_DIR_SIZE 0
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#define BTRFS_DIRTY_METADATA_THRESH SZ_32M
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#define BTRFS_MAX_EXTENT_SIZE SZ_128M
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static inline unsigned long btrfs_chunk_item_size(int num_stripes)
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{
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BUG_ON(num_stripes == 0);
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@ -68,17 +61,6 @@ static inline unsigned long btrfs_chunk_item_size(int num_stripes)
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sizeof(struct btrfs_stripe) * (num_stripes - 1);
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}
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#define BTRFS_SUPER_INFO_OFFSET SZ_64K
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#define BTRFS_SUPER_INFO_SIZE 4096
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static_assert(sizeof(struct btrfs_super_block) == BTRFS_SUPER_INFO_SIZE);
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/*
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* The reserved space at the beginning of each device.
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* It covers the primary super block and leaves space for potential use by other
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* tools like bootloaders or to lower potential damage of accidental overwrite.
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*/
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#define BTRFS_DEVICE_RANGE_RESERVED (SZ_1M)
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/* Read ahead values for struct btrfs_path.reada */
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enum {
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READA_NONE,
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@ -137,645 +119,6 @@ struct btrfs_path {
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unsigned int nowait:1;
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};
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struct btrfs_dev_replace {
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u64 replace_state; /* see #define above */
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time64_t time_started; /* seconds since 1-Jan-1970 */
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time64_t time_stopped; /* seconds since 1-Jan-1970 */
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atomic64_t num_write_errors;
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atomic64_t num_uncorrectable_read_errors;
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u64 cursor_left;
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u64 committed_cursor_left;
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u64 cursor_left_last_write_of_item;
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u64 cursor_right;
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u64 cont_reading_from_srcdev_mode; /* see #define above */
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int is_valid;
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int item_needs_writeback;
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struct btrfs_device *srcdev;
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struct btrfs_device *tgtdev;
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struct mutex lock_finishing_cancel_unmount;
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struct rw_semaphore rwsem;
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struct btrfs_scrub_progress scrub_progress;
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struct percpu_counter bio_counter;
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wait_queue_head_t replace_wait;
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};
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/*
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* free clusters are used to claim free space in relatively large chunks,
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* allowing us to do less seeky writes. They are used for all metadata
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* allocations. In ssd_spread mode they are also used for data allocations.
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*/
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struct btrfs_free_cluster {
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spinlock_t lock;
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spinlock_t refill_lock;
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struct rb_root root;
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/* largest extent in this cluster */
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u64 max_size;
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/* first extent starting offset */
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u64 window_start;
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/* We did a full search and couldn't create a cluster */
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bool fragmented;
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struct btrfs_block_group *block_group;
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/*
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* when a cluster is allocated from a block group, we put the
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* cluster onto a list in the block group so that it can
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* be freed before the block group is freed.
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*/
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struct list_head block_group_list;
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};
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/* Discard control. */
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/*
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* Async discard uses multiple lists to differentiate the discard filter
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* parameters. Index 0 is for completely free block groups where we need to
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* ensure the entire block group is trimmed without being lossy. Indices
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* afterwards represent monotonically decreasing discard filter sizes to
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* prioritize what should be discarded next.
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*/
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#define BTRFS_NR_DISCARD_LISTS 3
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#define BTRFS_DISCARD_INDEX_UNUSED 0
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#define BTRFS_DISCARD_INDEX_START 1
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struct btrfs_discard_ctl {
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struct workqueue_struct *discard_workers;
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struct delayed_work work;
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spinlock_t lock;
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struct btrfs_block_group *block_group;
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struct list_head discard_list[BTRFS_NR_DISCARD_LISTS];
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u64 prev_discard;
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u64 prev_discard_time;
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atomic_t discardable_extents;
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atomic64_t discardable_bytes;
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u64 max_discard_size;
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u64 delay_ms;
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u32 iops_limit;
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u32 kbps_limit;
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u64 discard_extent_bytes;
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u64 discard_bitmap_bytes;
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atomic64_t discard_bytes_saved;
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};
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/*
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* Exclusive operations (device replace, resize, device add/remove, balance)
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*/
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enum btrfs_exclusive_operation {
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BTRFS_EXCLOP_NONE,
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BTRFS_EXCLOP_BALANCE_PAUSED,
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BTRFS_EXCLOP_BALANCE,
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BTRFS_EXCLOP_DEV_ADD,
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BTRFS_EXCLOP_DEV_REMOVE,
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BTRFS_EXCLOP_DEV_REPLACE,
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BTRFS_EXCLOP_RESIZE,
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BTRFS_EXCLOP_SWAP_ACTIVATE,
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};
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/* Store data about transaction commits, exported via sysfs. */
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struct btrfs_commit_stats {
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/* Total number of commits */
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u64 commit_count;
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/* The maximum commit duration so far in ns */
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u64 max_commit_dur;
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/* The last commit duration in ns */
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u64 last_commit_dur;
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/* The total commit duration in ns */
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u64 total_commit_dur;
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};
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struct btrfs_fs_info {
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u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
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unsigned long flags;
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struct btrfs_root *tree_root;
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struct btrfs_root *chunk_root;
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struct btrfs_root *dev_root;
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struct btrfs_root *fs_root;
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struct btrfs_root *quota_root;
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struct btrfs_root *uuid_root;
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struct btrfs_root *data_reloc_root;
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struct btrfs_root *block_group_root;
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/* the log root tree is a directory of all the other log roots */
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struct btrfs_root *log_root_tree;
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/* The tree that holds the global roots (csum, extent, etc) */
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rwlock_t global_root_lock;
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struct rb_root global_root_tree;
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spinlock_t fs_roots_radix_lock;
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struct radix_tree_root fs_roots_radix;
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/* block group cache stuff */
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rwlock_t block_group_cache_lock;
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struct rb_root_cached block_group_cache_tree;
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/* keep track of unallocated space */
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atomic64_t free_chunk_space;
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/* Track ranges which are used by log trees blocks/logged data extents */
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struct extent_io_tree excluded_extents;
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/* logical->physical extent mapping */
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struct extent_map_tree mapping_tree;
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/*
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* block reservation for extent, checksum, root tree and
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* delayed dir index item
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*/
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struct btrfs_block_rsv global_block_rsv;
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/* block reservation for metadata operations */
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struct btrfs_block_rsv trans_block_rsv;
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/* block reservation for chunk tree */
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struct btrfs_block_rsv chunk_block_rsv;
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/* block reservation for delayed operations */
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struct btrfs_block_rsv delayed_block_rsv;
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/* block reservation for delayed refs */
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struct btrfs_block_rsv delayed_refs_rsv;
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struct btrfs_block_rsv empty_block_rsv;
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u64 generation;
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u64 last_trans_committed;
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/*
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* Generation of the last transaction used for block group relocation
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* since the filesystem was last mounted (or 0 if none happened yet).
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* Must be written and read while holding btrfs_fs_info::commit_root_sem.
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*/
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u64 last_reloc_trans;
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u64 avg_delayed_ref_runtime;
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/*
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* this is updated to the current trans every time a full commit
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* is required instead of the faster short fsync log commits
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*/
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u64 last_trans_log_full_commit;
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unsigned long mount_opt;
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unsigned long compress_type:4;
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unsigned int compress_level;
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u32 commit_interval;
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/*
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* It is a suggestive number, the read side is safe even it gets a
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* wrong number because we will write out the data into a regular
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* extent. The write side(mount/remount) is under ->s_umount lock,
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* so it is also safe.
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*/
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u64 max_inline;
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struct btrfs_transaction *running_transaction;
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wait_queue_head_t transaction_throttle;
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wait_queue_head_t transaction_wait;
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wait_queue_head_t transaction_blocked_wait;
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wait_queue_head_t async_submit_wait;
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/*
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* Used to protect the incompat_flags, compat_flags, compat_ro_flags
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* when they are updated.
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*
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* Because we do not clear the flags for ever, so we needn't use
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* the lock on the read side.
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*
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* We also needn't use the lock when we mount the fs, because
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* there is no other task which will update the flag.
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*/
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spinlock_t super_lock;
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struct btrfs_super_block *super_copy;
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struct btrfs_super_block *super_for_commit;
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struct super_block *sb;
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struct inode *btree_inode;
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struct mutex tree_log_mutex;
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struct mutex transaction_kthread_mutex;
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struct mutex cleaner_mutex;
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struct mutex chunk_mutex;
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/*
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* this is taken to make sure we don't set block groups ro after
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* the free space cache has been allocated on them
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*/
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struct mutex ro_block_group_mutex;
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/* this is used during read/modify/write to make sure
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* no two ios are trying to mod the same stripe at the same
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* time
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*/
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struct btrfs_stripe_hash_table *stripe_hash_table;
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/*
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* this protects the ordered operations list only while we are
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* processing all of the entries on it. This way we make
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* sure the commit code doesn't find the list temporarily empty
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* because another function happens to be doing non-waiting preflush
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* before jumping into the main commit.
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*/
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struct mutex ordered_operations_mutex;
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struct rw_semaphore commit_root_sem;
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struct rw_semaphore cleanup_work_sem;
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struct rw_semaphore subvol_sem;
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spinlock_t trans_lock;
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/*
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* the reloc mutex goes with the trans lock, it is taken
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* during commit to protect us from the relocation code
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*/
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struct mutex reloc_mutex;
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struct list_head trans_list;
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struct list_head dead_roots;
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struct list_head caching_block_groups;
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spinlock_t delayed_iput_lock;
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struct list_head delayed_iputs;
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atomic_t nr_delayed_iputs;
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wait_queue_head_t delayed_iputs_wait;
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atomic64_t tree_mod_seq;
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/* this protects tree_mod_log and tree_mod_seq_list */
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rwlock_t tree_mod_log_lock;
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struct rb_root tree_mod_log;
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struct list_head tree_mod_seq_list;
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atomic_t async_delalloc_pages;
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/*
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* this is used to protect the following list -- ordered_roots.
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*/
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spinlock_t ordered_root_lock;
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/*
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* all fs/file tree roots in which there are data=ordered extents
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* pending writeback are added into this list.
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*
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* these can span multiple transactions and basically include
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* every dirty data page that isn't from nodatacow
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*/
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struct list_head ordered_roots;
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struct mutex delalloc_root_mutex;
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spinlock_t delalloc_root_lock;
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/* all fs/file tree roots that have delalloc inodes. */
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struct list_head delalloc_roots;
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/*
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* there is a pool of worker threads for checksumming during writes
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* and a pool for checksumming after reads. This is because readers
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* can run with FS locks held, and the writers may be waiting for
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* those locks. We don't want ordering in the pending list to cause
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* deadlocks, and so the two are serviced separately.
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*
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* A third pool does submit_bio to avoid deadlocking with the other
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* two
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*/
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struct btrfs_workqueue *workers;
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struct btrfs_workqueue *hipri_workers;
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struct btrfs_workqueue *delalloc_workers;
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struct btrfs_workqueue *flush_workers;
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struct workqueue_struct *endio_workers;
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struct workqueue_struct *endio_meta_workers;
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struct workqueue_struct *endio_raid56_workers;
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struct workqueue_struct *rmw_workers;
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struct workqueue_struct *compressed_write_workers;
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struct btrfs_workqueue *endio_write_workers;
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struct btrfs_workqueue *endio_freespace_worker;
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struct btrfs_workqueue *caching_workers;
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/*
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* fixup workers take dirty pages that didn't properly go through
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* the cow mechanism and make them safe to write. It happens
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* for the sys_munmap function call path
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*/
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struct btrfs_workqueue *fixup_workers;
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struct btrfs_workqueue *delayed_workers;
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struct task_struct *transaction_kthread;
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struct task_struct *cleaner_kthread;
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u32 thread_pool_size;
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struct kobject *space_info_kobj;
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struct kobject *qgroups_kobj;
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struct kobject *discard_kobj;
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/* used to keep from writing metadata until there is a nice batch */
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struct percpu_counter dirty_metadata_bytes;
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struct percpu_counter delalloc_bytes;
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struct percpu_counter ordered_bytes;
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s32 dirty_metadata_batch;
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s32 delalloc_batch;
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struct list_head dirty_cowonly_roots;
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struct btrfs_fs_devices *fs_devices;
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/*
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* The space_info list is effectively read only after initial
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* setup. It is populated at mount time and cleaned up after
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* all block groups are removed. RCU is used to protect it.
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*/
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struct list_head space_info;
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struct btrfs_space_info *data_sinfo;
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struct reloc_control *reloc_ctl;
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/* data_alloc_cluster is only used in ssd_spread mode */
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struct btrfs_free_cluster data_alloc_cluster;
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/* all metadata allocations go through this cluster */
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struct btrfs_free_cluster meta_alloc_cluster;
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/* auto defrag inodes go here */
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spinlock_t defrag_inodes_lock;
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struct rb_root defrag_inodes;
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atomic_t defrag_running;
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/* Used to protect avail_{data, metadata, system}_alloc_bits */
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seqlock_t profiles_lock;
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/*
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* these three are in extended format (availability of single
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* chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
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* types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
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*/
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u64 avail_data_alloc_bits;
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u64 avail_metadata_alloc_bits;
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u64 avail_system_alloc_bits;
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/* restriper state */
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spinlock_t balance_lock;
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struct mutex balance_mutex;
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atomic_t balance_pause_req;
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atomic_t balance_cancel_req;
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struct btrfs_balance_control *balance_ctl;
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wait_queue_head_t balance_wait_q;
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/* Cancellation requests for chunk relocation */
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atomic_t reloc_cancel_req;
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u32 data_chunk_allocations;
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u32 metadata_ratio;
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void *bdev_holder;
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/* private scrub information */
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struct mutex scrub_lock;
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atomic_t scrubs_running;
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atomic_t scrub_pause_req;
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atomic_t scrubs_paused;
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atomic_t scrub_cancel_req;
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wait_queue_head_t scrub_pause_wait;
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/*
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* The worker pointers are NULL iff the refcount is 0, ie. scrub is not
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* running.
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*/
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refcount_t scrub_workers_refcnt;
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struct workqueue_struct *scrub_workers;
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struct workqueue_struct *scrub_wr_completion_workers;
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struct workqueue_struct *scrub_parity_workers;
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struct btrfs_subpage_info *subpage_info;
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struct btrfs_discard_ctl discard_ctl;
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#ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
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u32 check_integrity_print_mask;
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#endif
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/* is qgroup tracking in a consistent state? */
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u64 qgroup_flags;
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/* holds configuration and tracking. Protected by qgroup_lock */
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struct rb_root qgroup_tree;
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spinlock_t qgroup_lock;
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/*
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* used to avoid frequently calling ulist_alloc()/ulist_free()
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* when doing qgroup accounting, it must be protected by qgroup_lock.
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*/
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struct ulist *qgroup_ulist;
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/*
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* Protect user change for quota operations. If a transaction is needed,
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* it must be started before locking this lock.
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*/
|
||||
struct mutex qgroup_ioctl_lock;
|
||||
|
||||
/* list of dirty qgroups to be written at next commit */
|
||||
struct list_head dirty_qgroups;
|
||||
|
||||
/* used by qgroup for an efficient tree traversal */
|
||||
u64 qgroup_seq;
|
||||
|
||||
/* qgroup rescan items */
|
||||
struct mutex qgroup_rescan_lock; /* protects the progress item */
|
||||
struct btrfs_key qgroup_rescan_progress;
|
||||
struct btrfs_workqueue *qgroup_rescan_workers;
|
||||
struct completion qgroup_rescan_completion;
|
||||
struct btrfs_work qgroup_rescan_work;
|
||||
bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */
|
||||
u8 qgroup_drop_subtree_thres;
|
||||
|
||||
/* filesystem state */
|
||||
unsigned long fs_state;
|
||||
|
||||
struct btrfs_delayed_root *delayed_root;
|
||||
|
||||
/* Extent buffer radix tree */
|
||||
spinlock_t buffer_lock;
|
||||
/* Entries are eb->start / sectorsize */
|
||||
struct radix_tree_root buffer_radix;
|
||||
|
||||
/* next backup root to be overwritten */
|
||||
int backup_root_index;
|
||||
|
||||
/* device replace state */
|
||||
struct btrfs_dev_replace dev_replace;
|
||||
|
||||
struct semaphore uuid_tree_rescan_sem;
|
||||
|
||||
/* Used to reclaim the metadata space in the background. */
|
||||
struct work_struct async_reclaim_work;
|
||||
struct work_struct async_data_reclaim_work;
|
||||
struct work_struct preempt_reclaim_work;
|
||||
|
||||
/* Reclaim partially filled block groups in the background */
|
||||
struct work_struct reclaim_bgs_work;
|
||||
struct list_head reclaim_bgs;
|
||||
int bg_reclaim_threshold;
|
||||
|
||||
spinlock_t unused_bgs_lock;
|
||||
struct list_head unused_bgs;
|
||||
struct mutex unused_bg_unpin_mutex;
|
||||
/* Protect block groups that are going to be deleted */
|
||||
struct mutex reclaim_bgs_lock;
|
||||
|
||||
/* Cached block sizes */
|
||||
u32 nodesize;
|
||||
u32 sectorsize;
|
||||
/* ilog2 of sectorsize, use to avoid 64bit division */
|
||||
u32 sectorsize_bits;
|
||||
u32 csum_size;
|
||||
u32 csums_per_leaf;
|
||||
u32 stripesize;
|
||||
|
||||
/*
|
||||
* Maximum size of an extent. BTRFS_MAX_EXTENT_SIZE on regular
|
||||
* filesystem, on zoned it depends on the device constraints.
|
||||
*/
|
||||
u64 max_extent_size;
|
||||
|
||||
/* Block groups and devices containing active swapfiles. */
|
||||
spinlock_t swapfile_pins_lock;
|
||||
struct rb_root swapfile_pins;
|
||||
|
||||
struct crypto_shash *csum_shash;
|
||||
|
||||
/* Type of exclusive operation running, protected by super_lock */
|
||||
enum btrfs_exclusive_operation exclusive_operation;
|
||||
|
||||
/*
|
||||
* Zone size > 0 when in ZONED mode, otherwise it's used for a check
|
||||
* if the mode is enabled
|
||||
*/
|
||||
u64 zone_size;
|
||||
|
||||
/* Max size to emit ZONE_APPEND write command */
|
||||
u64 max_zone_append_size;
|
||||
struct mutex zoned_meta_io_lock;
|
||||
spinlock_t treelog_bg_lock;
|
||||
u64 treelog_bg;
|
||||
|
||||
/*
|
||||
* Start of the dedicated data relocation block group, protected by
|
||||
* relocation_bg_lock.
|
||||
*/
|
||||
spinlock_t relocation_bg_lock;
|
||||
u64 data_reloc_bg;
|
||||
struct mutex zoned_data_reloc_io_lock;
|
||||
|
||||
u64 nr_global_roots;
|
||||
|
||||
spinlock_t zone_active_bgs_lock;
|
||||
struct list_head zone_active_bgs;
|
||||
|
||||
/* Updates are not protected by any lock */
|
||||
struct btrfs_commit_stats commit_stats;
|
||||
|
||||
/*
|
||||
* Last generation where we dropped a non-relocation root.
|
||||
* Use btrfs_set_last_root_drop_gen() and btrfs_get_last_root_drop_gen()
|
||||
* to change it and to read it, respectively.
|
||||
*/
|
||||
u64 last_root_drop_gen;
|
||||
|
||||
/*
|
||||
* Annotations for transaction events (structures are empty when
|
||||
* compiled without lockdep).
|
||||
*/
|
||||
struct lockdep_map btrfs_trans_num_writers_map;
|
||||
struct lockdep_map btrfs_trans_num_extwriters_map;
|
||||
struct lockdep_map btrfs_state_change_map[4];
|
||||
struct lockdep_map btrfs_trans_pending_ordered_map;
|
||||
struct lockdep_map btrfs_ordered_extent_map;
|
||||
|
||||
#ifdef CONFIG_BTRFS_FS_REF_VERIFY
|
||||
spinlock_t ref_verify_lock;
|
||||
struct rb_root block_tree;
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_BTRFS_DEBUG
|
||||
struct kobject *debug_kobj;
|
||||
struct list_head allocated_roots;
|
||||
|
||||
spinlock_t eb_leak_lock;
|
||||
struct list_head allocated_ebs;
|
||||
#endif
|
||||
};
|
||||
|
||||
static inline void btrfs_set_last_root_drop_gen(struct btrfs_fs_info *fs_info,
|
||||
u64 gen)
|
||||
{
|
||||
WRITE_ONCE(fs_info->last_root_drop_gen, gen);
|
||||
}
|
||||
|
||||
static inline u64 btrfs_get_last_root_drop_gen(const struct btrfs_fs_info *fs_info)
|
||||
{
|
||||
return READ_ONCE(fs_info->last_root_drop_gen);
|
||||
}
|
||||
|
||||
static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
|
||||
{
|
||||
return sb->s_fs_info;
|
||||
}
|
||||
|
||||
/*
|
||||
* Take the number of bytes to be checksummed and figure out how many leaves
|
||||
* it would require to store the csums for that many bytes.
|
||||
*/
|
||||
static inline u64 btrfs_csum_bytes_to_leaves(
|
||||
const struct btrfs_fs_info *fs_info, u64 csum_bytes)
|
||||
{
|
||||
const u64 num_csums = csum_bytes >> fs_info->sectorsize_bits;
|
||||
|
||||
return DIV_ROUND_UP_ULL(num_csums, fs_info->csums_per_leaf);
|
||||
}
|
||||
|
||||
/*
|
||||
* Use this if we would be adding new items, as we could split nodes as we cow
|
||||
* down the tree.
|
||||
*/
|
||||
static inline u64 btrfs_calc_insert_metadata_size(struct btrfs_fs_info *fs_info,
|
||||
unsigned num_items)
|
||||
{
|
||||
return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
|
||||
}
|
||||
|
||||
/*
|
||||
* Doing a truncate or a modification won't result in new nodes or leaves, just
|
||||
* what we need for COW.
|
||||
*/
|
||||
static inline u64 btrfs_calc_metadata_size(struct btrfs_fs_info *fs_info,
|
||||
unsigned num_items)
|
||||
{
|
||||
return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items;
|
||||
}
|
||||
|
||||
#define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
|
||||
sizeof(struct btrfs_item))
|
||||
|
||||
static inline bool btrfs_is_zoned(const struct btrfs_fs_info *fs_info)
|
||||
{
|
||||
return fs_info->zone_size > 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Count how many fs_info->max_extent_size cover the @size
|
||||
*/
|
||||
static inline u32 count_max_extents(struct btrfs_fs_info *fs_info, u64 size)
|
||||
{
|
||||
#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
|
||||
if (!fs_info)
|
||||
return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE);
|
||||
#endif
|
||||
|
||||
return div_u64(size + fs_info->max_extent_size - 1, fs_info->max_extent_size);
|
||||
}
|
||||
|
||||
bool btrfs_exclop_start(struct btrfs_fs_info *fs_info,
|
||||
enum btrfs_exclusive_operation type);
|
||||
bool btrfs_exclop_start_try_lock(struct btrfs_fs_info *fs_info,
|
||||
enum btrfs_exclusive_operation type);
|
||||
void btrfs_exclop_start_unlock(struct btrfs_fs_info *fs_info);
|
||||
void btrfs_exclop_finish(struct btrfs_fs_info *fs_info);
|
||||
void btrfs_exclop_balance(struct btrfs_fs_info *fs_info,
|
||||
enum btrfs_exclusive_operation op);
|
||||
|
||||
/*
|
||||
* The state of btrfs root
|
||||
*/
|
||||
|
||||
660
fs/btrfs/fs.h
660
fs/btrfs/fs.h
@ -3,6 +3,24 @@
|
||||
#ifndef BTRFS_FS_H
|
||||
#define BTRFS_FS_H
|
||||
|
||||
#define BTRFS_MAX_EXTENT_SIZE SZ_128M
|
||||
|
||||
#define BTRFS_OLDEST_GENERATION 0ULL
|
||||
|
||||
#define BTRFS_EMPTY_DIR_SIZE 0
|
||||
|
||||
#define BTRFS_DIRTY_METADATA_THRESH SZ_32M
|
||||
|
||||
#define BTRFS_SUPER_INFO_OFFSET SZ_64K
|
||||
#define BTRFS_SUPER_INFO_SIZE 4096
|
||||
static_assert(sizeof(struct btrfs_super_block) == BTRFS_SUPER_INFO_SIZE);
|
||||
|
||||
/*
|
||||
* The reserved space at the beginning of each device. It covers the primary
|
||||
* super block and leaves space for potential use by other tools like
|
||||
* bootloaders or to lower potential damage of accidental overwrite.
|
||||
*/
|
||||
#define BTRFS_DEVICE_RANGE_RESERVED (SZ_1M)
|
||||
/*
|
||||
* Runtime (in-memory) states of filesystem
|
||||
*/
|
||||
@ -200,6 +218,648 @@ enum {
|
||||
#define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
|
||||
#define BTRFS_DEFAULT_MAX_INLINE (2048)
|
||||
|
||||
struct btrfs_dev_replace {
|
||||
/* See #define above */
|
||||
u64 replace_state;
|
||||
/* Seconds since 1-Jan-1970 */
|
||||
time64_t time_started;
|
||||
/* Seconds since 1-Jan-1970 */
|
||||
time64_t time_stopped;
|
||||
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;
|
||||
|
||||
/* See #define above */
|
||||
u64 cont_reading_from_srcdev_mode;
|
||||
|
||||
int is_valid;
|
||||
int item_needs_writeback;
|
||||
struct btrfs_device *srcdev;
|
||||
struct btrfs_device *tgtdev;
|
||||
|
||||
struct mutex lock_finishing_cancel_unmount;
|
||||
struct rw_semaphore rwsem;
|
||||
|
||||
struct btrfs_scrub_progress scrub_progress;
|
||||
|
||||
struct percpu_counter bio_counter;
|
||||
wait_queue_head_t replace_wait;
|
||||
};
|
||||
|
||||
/*
|
||||
* Free clusters are used to claim free space in relatively large chunks,
|
||||
* allowing us to do less seeky writes. They are used for all metadata
|
||||
* allocations. In ssd_spread mode they are also used for data allocations.
|
||||
*/
|
||||
struct btrfs_free_cluster {
|
||||
spinlock_t lock;
|
||||
spinlock_t refill_lock;
|
||||
struct rb_root root;
|
||||
|
||||
/* Largest extent in this cluster */
|
||||
u64 max_size;
|
||||
|
||||
/* First extent starting offset */
|
||||
u64 window_start;
|
||||
|
||||
/* We did a full search and couldn't create a cluster */
|
||||
bool fragmented;
|
||||
|
||||
struct btrfs_block_group *block_group;
|
||||
/*
|
||||
* When a cluster is allocated from a block group, we put the cluster
|
||||
* onto a list in the block group so that it can be freed before the
|
||||
* block group is freed.
|
||||
*/
|
||||
struct list_head block_group_list;
|
||||
};
|
||||
|
||||
/* Discard control. */
|
||||
/*
|
||||
* Async discard uses multiple lists to differentiate the discard filter
|
||||
* parameters. Index 0 is for completely free block groups where we need to
|
||||
* ensure the entire block group is trimmed without being lossy. Indices
|
||||
* afterwards represent monotonically decreasing discard filter sizes to
|
||||
* prioritize what should be discarded next.
|
||||
*/
|
||||
#define BTRFS_NR_DISCARD_LISTS 3
|
||||
#define BTRFS_DISCARD_INDEX_UNUSED 0
|
||||
#define BTRFS_DISCARD_INDEX_START 1
|
||||
|
||||
struct btrfs_discard_ctl {
|
||||
struct workqueue_struct *discard_workers;
|
||||
struct delayed_work work;
|
||||
spinlock_t lock;
|
||||
struct btrfs_block_group *block_group;
|
||||
struct list_head discard_list[BTRFS_NR_DISCARD_LISTS];
|
||||
u64 prev_discard;
|
||||
u64 prev_discard_time;
|
||||
atomic_t discardable_extents;
|
||||
atomic64_t discardable_bytes;
|
||||
u64 max_discard_size;
|
||||
u64 delay_ms;
|
||||
u32 iops_limit;
|
||||
u32 kbps_limit;
|
||||
u64 discard_extent_bytes;
|
||||
u64 discard_bitmap_bytes;
|
||||
atomic64_t discard_bytes_saved;
|
||||
};
|
||||
|
||||
/*
|
||||
* Exclusive operations (device replace, resize, device add/remove, balance)
|
||||
*/
|
||||
enum btrfs_exclusive_operation {
|
||||
BTRFS_EXCLOP_NONE,
|
||||
BTRFS_EXCLOP_BALANCE_PAUSED,
|
||||
BTRFS_EXCLOP_BALANCE,
|
||||
BTRFS_EXCLOP_DEV_ADD,
|
||||
BTRFS_EXCLOP_DEV_REMOVE,
|
||||
BTRFS_EXCLOP_DEV_REPLACE,
|
||||
BTRFS_EXCLOP_RESIZE,
|
||||
BTRFS_EXCLOP_SWAP_ACTIVATE,
|
||||
};
|
||||
|
||||
/* Store data about transaction commits, exported via sysfs. */
|
||||
struct btrfs_commit_stats {
|
||||
/* Total number of commits */
|
||||
u64 commit_count;
|
||||
/* The maximum commit duration so far in ns */
|
||||
u64 max_commit_dur;
|
||||
/* The last commit duration in ns */
|
||||
u64 last_commit_dur;
|
||||
/* The total commit duration in ns */
|
||||
u64 total_commit_dur;
|
||||
};
|
||||
|
||||
struct btrfs_fs_info {
|
||||
u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
|
||||
unsigned long flags;
|
||||
struct btrfs_root *tree_root;
|
||||
struct btrfs_root *chunk_root;
|
||||
struct btrfs_root *dev_root;
|
||||
struct btrfs_root *fs_root;
|
||||
struct btrfs_root *quota_root;
|
||||
struct btrfs_root *uuid_root;
|
||||
struct btrfs_root *data_reloc_root;
|
||||
struct btrfs_root *block_group_root;
|
||||
|
||||
/* The log root tree is a directory of all the other log roots */
|
||||
struct btrfs_root *log_root_tree;
|
||||
|
||||
/* The tree that holds the global roots (csum, extent, etc) */
|
||||
rwlock_t global_root_lock;
|
||||
struct rb_root global_root_tree;
|
||||
|
||||
spinlock_t fs_roots_radix_lock;
|
||||
struct radix_tree_root fs_roots_radix;
|
||||
|
||||
/* Block group cache stuff */
|
||||
rwlock_t block_group_cache_lock;
|
||||
struct rb_root_cached block_group_cache_tree;
|
||||
|
||||
/* Keep track of unallocated space */
|
||||
atomic64_t free_chunk_space;
|
||||
|
||||
/* Track ranges which are used by log trees blocks/logged data extents */
|
||||
struct extent_io_tree excluded_extents;
|
||||
|
||||
/* logical->physical extent mapping */
|
||||
struct extent_map_tree mapping_tree;
|
||||
|
||||
/*
|
||||
* Block reservation for extent, checksum, root tree and delayed dir
|
||||
* index item.
|
||||
*/
|
||||
struct btrfs_block_rsv global_block_rsv;
|
||||
/* Block reservation for metadata operations */
|
||||
struct btrfs_block_rsv trans_block_rsv;
|
||||
/* Block reservation for chunk tree */
|
||||
struct btrfs_block_rsv chunk_block_rsv;
|
||||
/* Block reservation for delayed operations */
|
||||
struct btrfs_block_rsv delayed_block_rsv;
|
||||
/* Block reservation for delayed refs */
|
||||
struct btrfs_block_rsv delayed_refs_rsv;
|
||||
|
||||
struct btrfs_block_rsv empty_block_rsv;
|
||||
|
||||
u64 generation;
|
||||
u64 last_trans_committed;
|
||||
/*
|
||||
* Generation of the last transaction used for block group relocation
|
||||
* since the filesystem was last mounted (or 0 if none happened yet).
|
||||
* Must be written and read while holding btrfs_fs_info::commit_root_sem.
|
||||
*/
|
||||
u64 last_reloc_trans;
|
||||
u64 avg_delayed_ref_runtime;
|
||||
|
||||
/*
|
||||
* This is updated to the current trans every time a full commit is
|
||||
* required instead of the faster short fsync log commits
|
||||
*/
|
||||
u64 last_trans_log_full_commit;
|
||||
unsigned long mount_opt;
|
||||
|
||||
unsigned long compress_type:4;
|
||||
unsigned int compress_level;
|
||||
u32 commit_interval;
|
||||
/*
|
||||
* It is a suggestive number, the read side is safe even it gets a
|
||||
* wrong number because we will write out the data into a regular
|
||||
* extent. The write side(mount/remount) is under ->s_umount lock,
|
||||
* so it is also safe.
|
||||
*/
|
||||
u64 max_inline;
|
||||
|
||||
struct btrfs_transaction *running_transaction;
|
||||
wait_queue_head_t transaction_throttle;
|
||||
wait_queue_head_t transaction_wait;
|
||||
wait_queue_head_t transaction_blocked_wait;
|
||||
wait_queue_head_t async_submit_wait;
|
||||
|
||||
/*
|
||||
* Used to protect the incompat_flags, compat_flags, compat_ro_flags
|
||||
* when they are updated.
|
||||
*
|
||||
* Because we do not clear the flags for ever, so we needn't use
|
||||
* the lock on the read side.
|
||||
*
|
||||
* We also needn't use the lock when we mount the fs, because
|
||||
* there is no other task which will update the flag.
|
||||
*/
|
||||
spinlock_t super_lock;
|
||||
struct btrfs_super_block *super_copy;
|
||||
struct btrfs_super_block *super_for_commit;
|
||||
struct super_block *sb;
|
||||
struct inode *btree_inode;
|
||||
struct mutex tree_log_mutex;
|
||||
struct mutex transaction_kthread_mutex;
|
||||
struct mutex cleaner_mutex;
|
||||
struct mutex chunk_mutex;
|
||||
|
||||
/*
|
||||
* This is taken to make sure we don't set block groups ro after the
|
||||
* free space cache has been allocated on them.
|
||||
*/
|
||||
struct mutex ro_block_group_mutex;
|
||||
|
||||
/*
|
||||
* This is used during read/modify/write to make sure no two ios are
|
||||
* trying to mod the same stripe at the same time.
|
||||
*/
|
||||
struct btrfs_stripe_hash_table *stripe_hash_table;
|
||||
|
||||
/*
|
||||
* This protects the ordered operations list only while we are
|
||||
* processing all of the entries on it. This way we make sure the
|
||||
* commit code doesn't find the list temporarily empty because another
|
||||
* function happens to be doing non-waiting preflush before jumping
|
||||
* into the main commit.
|
||||
*/
|
||||
struct mutex ordered_operations_mutex;
|
||||
|
||||
struct rw_semaphore commit_root_sem;
|
||||
|
||||
struct rw_semaphore cleanup_work_sem;
|
||||
|
||||
struct rw_semaphore subvol_sem;
|
||||
|
||||
spinlock_t trans_lock;
|
||||
/*
|
||||
* The reloc mutex goes with the trans lock, it is taken during commit
|
||||
* to protect us from the relocation code.
|
||||
*/
|
||||
struct mutex reloc_mutex;
|
||||
|
||||
struct list_head trans_list;
|
||||
struct list_head dead_roots;
|
||||
struct list_head caching_block_groups;
|
||||
|
||||
spinlock_t delayed_iput_lock;
|
||||
struct list_head delayed_iputs;
|
||||
atomic_t nr_delayed_iputs;
|
||||
wait_queue_head_t delayed_iputs_wait;
|
||||
|
||||
atomic64_t tree_mod_seq;
|
||||
|
||||
/* This protects tree_mod_log and tree_mod_seq_list */
|
||||
rwlock_t tree_mod_log_lock;
|
||||
struct rb_root tree_mod_log;
|
||||
struct list_head tree_mod_seq_list;
|
||||
|
||||
atomic_t async_delalloc_pages;
|
||||
|
||||
/* This is used to protect the following list -- ordered_roots. */
|
||||
spinlock_t ordered_root_lock;
|
||||
|
||||
/*
|
||||
* All fs/file tree roots in which there are data=ordered extents
|
||||
* pending writeback are added into this list.
|
||||
*
|
||||
* These can span multiple transactions and basically include every
|
||||
* dirty data page that isn't from nodatacow.
|
||||
*/
|
||||
struct list_head ordered_roots;
|
||||
|
||||
struct mutex delalloc_root_mutex;
|
||||
spinlock_t delalloc_root_lock;
|
||||
/* All fs/file tree roots that have delalloc inodes. */
|
||||
struct list_head delalloc_roots;
|
||||
|
||||
/*
|
||||
* There is a pool of worker threads for checksumming during writes and
|
||||
* a pool for checksumming after reads. This is because readers can
|
||||
* run with FS locks held, and the writers may be waiting for those
|
||||
* locks. We don't want ordering in the pending list to cause
|
||||
* deadlocks, and so the two are serviced separately.
|
||||
*
|
||||
* A third pool does submit_bio to avoid deadlocking with the other two.
|
||||
*/
|
||||
struct btrfs_workqueue *workers;
|
||||
struct btrfs_workqueue *hipri_workers;
|
||||
struct btrfs_workqueue *delalloc_workers;
|
||||
struct btrfs_workqueue *flush_workers;
|
||||
struct workqueue_struct *endio_workers;
|
||||
struct workqueue_struct *endio_meta_workers;
|
||||
struct workqueue_struct *endio_raid56_workers;
|
||||
struct workqueue_struct *rmw_workers;
|
||||
struct workqueue_struct *compressed_write_workers;
|
||||
struct btrfs_workqueue *endio_write_workers;
|
||||
struct btrfs_workqueue *endio_freespace_worker;
|
||||
struct btrfs_workqueue *caching_workers;
|
||||
|
||||
/*
|
||||
* Fixup workers take dirty pages that didn't properly go through the
|
||||
* cow mechanism and make them safe to write. It happens for the
|
||||
* sys_munmap function call path.
|
||||
*/
|
||||
struct btrfs_workqueue *fixup_workers;
|
||||
struct btrfs_workqueue *delayed_workers;
|
||||
|
||||
struct task_struct *transaction_kthread;
|
||||
struct task_struct *cleaner_kthread;
|
||||
u32 thread_pool_size;
|
||||
|
||||
struct kobject *space_info_kobj;
|
||||
struct kobject *qgroups_kobj;
|
||||
struct kobject *discard_kobj;
|
||||
|
||||
/* Used to keep from writing metadata until there is a nice batch */
|
||||
struct percpu_counter dirty_metadata_bytes;
|
||||
struct percpu_counter delalloc_bytes;
|
||||
struct percpu_counter ordered_bytes;
|
||||
s32 dirty_metadata_batch;
|
||||
s32 delalloc_batch;
|
||||
|
||||
struct list_head dirty_cowonly_roots;
|
||||
|
||||
struct btrfs_fs_devices *fs_devices;
|
||||
|
||||
/*
|
||||
* The space_info list is effectively read only after initial setup.
|
||||
* It is populated at mount time and cleaned up after all block groups
|
||||
* are removed. RCU is used to protect it.
|
||||
*/
|
||||
struct list_head space_info;
|
||||
|
||||
struct btrfs_space_info *data_sinfo;
|
||||
|
||||
struct reloc_control *reloc_ctl;
|
||||
|
||||
/* data_alloc_cluster is only used in ssd_spread mode */
|
||||
struct btrfs_free_cluster data_alloc_cluster;
|
||||
|
||||
/* All metadata allocations go through this cluster. */
|
||||
struct btrfs_free_cluster meta_alloc_cluster;
|
||||
|
||||
/* Auto defrag inodes go here. */
|
||||
spinlock_t defrag_inodes_lock;
|
||||
struct rb_root defrag_inodes;
|
||||
atomic_t defrag_running;
|
||||
|
||||
/* Used to protect avail_{data, metadata, system}_alloc_bits */
|
||||
seqlock_t profiles_lock;
|
||||
/*
|
||||
* These three are in extended format (availability of single chunks is
|
||||
* denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other types are denoted
|
||||
* by corresponding BTRFS_BLOCK_GROUP_* bits)
|
||||
*/
|
||||
u64 avail_data_alloc_bits;
|
||||
u64 avail_metadata_alloc_bits;
|
||||
u64 avail_system_alloc_bits;
|
||||
|
||||
/* Balance state */
|
||||
spinlock_t balance_lock;
|
||||
struct mutex balance_mutex;
|
||||
atomic_t balance_pause_req;
|
||||
atomic_t balance_cancel_req;
|
||||
struct btrfs_balance_control *balance_ctl;
|
||||
wait_queue_head_t balance_wait_q;
|
||||
|
||||
/* Cancellation requests for chunk relocation */
|
||||
atomic_t reloc_cancel_req;
|
||||
|
||||
u32 data_chunk_allocations;
|
||||
u32 metadata_ratio;
|
||||
|
||||
void *bdev_holder;
|
||||
|
||||
/* Private scrub information */
|
||||
struct mutex scrub_lock;
|
||||
atomic_t scrubs_running;
|
||||
atomic_t scrub_pause_req;
|
||||
atomic_t scrubs_paused;
|
||||
atomic_t scrub_cancel_req;
|
||||
wait_queue_head_t scrub_pause_wait;
|
||||
/*
|
||||
* The worker pointers are NULL iff the refcount is 0, ie. scrub is not
|
||||
* running.
|
||||
*/
|
||||
refcount_t scrub_workers_refcnt;
|
||||
struct workqueue_struct *scrub_workers;
|
||||
struct workqueue_struct *scrub_wr_completion_workers;
|
||||
struct workqueue_struct *scrub_parity_workers;
|
||||
struct btrfs_subpage_info *subpage_info;
|
||||
|
||||
struct btrfs_discard_ctl discard_ctl;
|
||||
|
||||
#ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
|
||||
u32 check_integrity_print_mask;
|
||||
#endif
|
||||
/* Is qgroup tracking in a consistent state? */
|
||||
u64 qgroup_flags;
|
||||
|
||||
/* Holds configuration and tracking. Protected by qgroup_lock. */
|
||||
struct rb_root qgroup_tree;
|
||||
spinlock_t qgroup_lock;
|
||||
|
||||
/*
|
||||
* Used to avoid frequently calling ulist_alloc()/ulist_free()
|
||||
* when doing qgroup accounting, it must be protected by qgroup_lock.
|
||||
*/
|
||||
struct ulist *qgroup_ulist;
|
||||
|
||||
/*
|
||||
* Protect user change for quota operations. If a transaction is needed,
|
||||
* it must be started before locking this lock.
|
||||
*/
|
||||
struct mutex qgroup_ioctl_lock;
|
||||
|
||||
/* List of dirty qgroups to be written at next commit. */
|
||||
struct list_head dirty_qgroups;
|
||||
|
||||
/* Used by qgroup for an efficient tree traversal. */
|
||||
u64 qgroup_seq;
|
||||
|
||||
/* Qgroup rescan items. */
|
||||
/* Protects the progress item */
|
||||
struct mutex qgroup_rescan_lock;
|
||||
struct btrfs_key qgroup_rescan_progress;
|
||||
struct btrfs_workqueue *qgroup_rescan_workers;
|
||||
struct completion qgroup_rescan_completion;
|
||||
struct btrfs_work qgroup_rescan_work;
|
||||
/* Protected by qgroup_rescan_lock */
|
||||
bool qgroup_rescan_running;
|
||||
u8 qgroup_drop_subtree_thres;
|
||||
|
||||
/* Filesystem state */
|
||||
unsigned long fs_state;
|
||||
|
||||
struct btrfs_delayed_root *delayed_root;
|
||||
|
||||
/* Extent buffer radix tree */
|
||||
spinlock_t buffer_lock;
|
||||
/* Entries are eb->start / sectorsize */
|
||||
struct radix_tree_root buffer_radix;
|
||||
|
||||
/* Next backup root to be overwritten */
|
||||
int backup_root_index;
|
||||
|
||||
/* Device replace state */
|
||||
struct btrfs_dev_replace dev_replace;
|
||||
|
||||
struct semaphore uuid_tree_rescan_sem;
|
||||
|
||||
/* Used to reclaim the metadata space in the background. */
|
||||
struct work_struct async_reclaim_work;
|
||||
struct work_struct async_data_reclaim_work;
|
||||
struct work_struct preempt_reclaim_work;
|
||||
|
||||
/* Reclaim partially filled block groups in the background */
|
||||
struct work_struct reclaim_bgs_work;
|
||||
struct list_head reclaim_bgs;
|
||||
int bg_reclaim_threshold;
|
||||
|
||||
spinlock_t unused_bgs_lock;
|
||||
struct list_head unused_bgs;
|
||||
struct mutex unused_bg_unpin_mutex;
|
||||
/* Protect block groups that are going to be deleted */
|
||||
struct mutex reclaim_bgs_lock;
|
||||
|
||||
/* Cached block sizes */
|
||||
u32 nodesize;
|
||||
u32 sectorsize;
|
||||
/* ilog2 of sectorsize, use to avoid 64bit division */
|
||||
u32 sectorsize_bits;
|
||||
u32 csum_size;
|
||||
u32 csums_per_leaf;
|
||||
u32 stripesize;
|
||||
|
||||
/*
|
||||
* Maximum size of an extent. BTRFS_MAX_EXTENT_SIZE on regular
|
||||
* filesystem, on zoned it depends on the device constraints.
|
||||
*/
|
||||
u64 max_extent_size;
|
||||
|
||||
/* Block groups and devices containing active swapfiles. */
|
||||
spinlock_t swapfile_pins_lock;
|
||||
struct rb_root swapfile_pins;
|
||||
|
||||
struct crypto_shash *csum_shash;
|
||||
|
||||
/* Type of exclusive operation running, protected by super_lock */
|
||||
enum btrfs_exclusive_operation exclusive_operation;
|
||||
|
||||
/*
|
||||
* Zone size > 0 when in ZONED mode, otherwise it's used for a check
|
||||
* if the mode is enabled
|
||||
*/
|
||||
u64 zone_size;
|
||||
|
||||
/* Max size to emit ZONE_APPEND write command */
|
||||
u64 max_zone_append_size;
|
||||
struct mutex zoned_meta_io_lock;
|
||||
spinlock_t treelog_bg_lock;
|
||||
u64 treelog_bg;
|
||||
|
||||
/*
|
||||
* Start of the dedicated data relocation block group, protected by
|
||||
* relocation_bg_lock.
|
||||
*/
|
||||
spinlock_t relocation_bg_lock;
|
||||
u64 data_reloc_bg;
|
||||
struct mutex zoned_data_reloc_io_lock;
|
||||
|
||||
u64 nr_global_roots;
|
||||
|
||||
spinlock_t zone_active_bgs_lock;
|
||||
struct list_head zone_active_bgs;
|
||||
|
||||
/* Updates are not protected by any lock */
|
||||
struct btrfs_commit_stats commit_stats;
|
||||
|
||||
/*
|
||||
* Last generation where we dropped a non-relocation root.
|
||||
* Use btrfs_set_last_root_drop_gen() and btrfs_get_last_root_drop_gen()
|
||||
* to change it and to read it, respectively.
|
||||
*/
|
||||
u64 last_root_drop_gen;
|
||||
|
||||
/*
|
||||
* Annotations for transaction events (structures are empty when
|
||||
* compiled without lockdep).
|
||||
*/
|
||||
struct lockdep_map btrfs_trans_num_writers_map;
|
||||
struct lockdep_map btrfs_trans_num_extwriters_map;
|
||||
struct lockdep_map btrfs_state_change_map[4];
|
||||
struct lockdep_map btrfs_trans_pending_ordered_map;
|
||||
struct lockdep_map btrfs_ordered_extent_map;
|
||||
|
||||
#ifdef CONFIG_BTRFS_FS_REF_VERIFY
|
||||
spinlock_t ref_verify_lock;
|
||||
struct rb_root block_tree;
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_BTRFS_DEBUG
|
||||
struct kobject *debug_kobj;
|
||||
struct list_head allocated_roots;
|
||||
|
||||
spinlock_t eb_leak_lock;
|
||||
struct list_head allocated_ebs;
|
||||
#endif
|
||||
};
|
||||
|
||||
static inline void btrfs_set_last_root_drop_gen(struct btrfs_fs_info *fs_info,
|
||||
u64 gen)
|
||||
{
|
||||
WRITE_ONCE(fs_info->last_root_drop_gen, gen);
|
||||
}
|
||||
|
||||
static inline u64 btrfs_get_last_root_drop_gen(const struct btrfs_fs_info *fs_info)
|
||||
{
|
||||
return READ_ONCE(fs_info->last_root_drop_gen);
|
||||
}
|
||||
|
||||
static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
|
||||
{
|
||||
return sb->s_fs_info;
|
||||
}
|
||||
|
||||
/*
|
||||
* Take the number of bytes to be checksummed and figure out how many leaves
|
||||
* it would require to store the csums for that many bytes.
|
||||
*/
|
||||
static inline u64 btrfs_csum_bytes_to_leaves(
|
||||
const struct btrfs_fs_info *fs_info, u64 csum_bytes)
|
||||
{
|
||||
const u64 num_csums = csum_bytes >> fs_info->sectorsize_bits;
|
||||
|
||||
return DIV_ROUND_UP_ULL(num_csums, fs_info->csums_per_leaf);
|
||||
}
|
||||
|
||||
/*
|
||||
* Use this if we would be adding new items, as we could split nodes as we cow
|
||||
* down the tree.
|
||||
*/
|
||||
static inline u64 btrfs_calc_insert_metadata_size(struct btrfs_fs_info *fs_info,
|
||||
unsigned num_items)
|
||||
{
|
||||
return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
|
||||
}
|
||||
|
||||
/*
|
||||
* Doing a truncate or a modification won't result in new nodes or leaves, just
|
||||
* what we need for COW.
|
||||
*/
|
||||
static inline u64 btrfs_calc_metadata_size(struct btrfs_fs_info *fs_info,
|
||||
unsigned num_items)
|
||||
{
|
||||
return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items;
|
||||
}
|
||||
|
||||
#define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
|
||||
sizeof(struct btrfs_item))
|
||||
|
||||
static inline bool btrfs_is_zoned(const struct btrfs_fs_info *fs_info)
|
||||
{
|
||||
return fs_info->zone_size > 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Count how many fs_info->max_extent_size cover the @size
|
||||
*/
|
||||
static inline u32 count_max_extents(struct btrfs_fs_info *fs_info, u64 size)
|
||||
{
|
||||
#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
|
||||
if (!fs_info)
|
||||
return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE);
|
||||
#endif
|
||||
|
||||
return div_u64(size + fs_info->max_extent_size - 1, fs_info->max_extent_size);
|
||||
}
|
||||
|
||||
bool btrfs_exclop_start(struct btrfs_fs_info *fs_info,
|
||||
enum btrfs_exclusive_operation type);
|
||||
bool btrfs_exclop_start_try_lock(struct btrfs_fs_info *fs_info,
|
||||
enum btrfs_exclusive_operation type);
|
||||
void btrfs_exclop_start_unlock(struct btrfs_fs_info *fs_info);
|
||||
void btrfs_exclop_finish(struct btrfs_fs_info *fs_info);
|
||||
void btrfs_exclop_balance(struct btrfs_fs_info *fs_info,
|
||||
enum btrfs_exclusive_operation op);
|
||||
|
||||
/* Compatibility and incompatibility defines */
|
||||
void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag,
|
||||
const char *name);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user