X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libbcachefs%2Fjournal_types.h;h=38817c7a0851592c67c591f9a7a425d58152a004;hb=1f79cf3825e94fcb146d417b6dda9b94c93c7a53;hp=154b51b891d33f1f6f89888e7afeef387392b75a;hpb=05408b6f8fea54bf53e68a4ef24291214970f6d0;p=bcachefs-tools-debian diff --git a/libbcachefs/journal_types.h b/libbcachefs/journal_types.h index 154b51b..38817c7 100644 --- a/libbcachefs/journal_types.h +++ b/libbcachefs/journal_types.h @@ -9,26 +9,34 @@ #include "super_types.h" #include "fifo.h" -struct journal_res; +#define JOURNAL_BUF_BITS 2 +#define JOURNAL_BUF_NR (1U << JOURNAL_BUF_BITS) +#define JOURNAL_BUF_MASK (JOURNAL_BUF_NR - 1) /* - * We put two of these in struct journal; we used them for writes to the - * journal that are being staged or in flight. + * We put JOURNAL_BUF_NR of these in struct journal; we used them for writes to + * the journal that are being staged or in flight. */ struct journal_buf { struct jset *data; - BKEY_PADDED(key); + __BKEY_PADDED(key, BCH_REPLICAS_MAX); + struct bch_devs_list devs_written; struct closure_waitlist wait; + u64 last_seq; /* copy of data->last_seq */ + long expires; + u64 flush_time; unsigned buf_size; /* size in bytes of @data */ unsigned sectors; /* maximum size for current entry */ unsigned disk_sectors; /* maximum size entry could have been, if buf_size was bigger */ unsigned u64s_reserved; - /* bloom filter: */ - unsigned long has_inode[1024 / sizeof(unsigned long)]; + bool noflush; /* write has already been kicked off, and was noflush */ + bool must_flush; /* something wants a flush */ + bool separate_flush; + bool need_flush_to_write_buffer; }; /* @@ -36,8 +44,15 @@ struct journal_buf { * flushed: */ +enum journal_pin_type { + JOURNAL_PIN_btree, + JOURNAL_PIN_key_cache, + JOURNAL_PIN_other, + JOURNAL_PIN_NR, +}; + struct journal_entry_pin_list { - struct list_head list; + struct list_head list[JOURNAL_PIN_NR]; struct list_head flushed; atomic_t count; struct bch_devs_list devs; @@ -45,7 +60,7 @@ struct journal_entry_pin_list { struct journal; struct journal_entry_pin; -typedef void (*journal_pin_flush_fn)(struct journal *j, +typedef int (*journal_pin_flush_fn)(struct journal *j, struct journal_entry_pin *, u64); struct journal_entry_pin { @@ -62,14 +77,6 @@ struct journal_res { u64 seq; }; -/* - * For reserving space in the journal prior to getting a reservation on a - * particular journal entry: - */ -struct journal_preres { - unsigned u64s; -}; - union journal_res_state { struct { atomic64_t counter; @@ -81,25 +88,12 @@ union journal_res_state { struct { u64 cur_entry_offset:20, - idx:1, - prev_buf_unwritten:1, - buf0_count:21, - buf1_count:21; - }; -}; - -union journal_preres_state { - struct { - atomic64_t counter; - }; - - struct { - u64 v; - }; - - struct { - u32 reserved; - u32 remaining; + idx:2, + unwritten_idx:2, + buf0_count:10, + buf1_count:10, + buf2_count:10, + buf3_count:10; }; }; @@ -116,51 +110,89 @@ union journal_preres_state { #define JOURNAL_ENTRY_CLOSED_VAL (JOURNAL_ENTRY_OFFSET_MAX - 1) #define JOURNAL_ENTRY_ERROR_VAL (JOURNAL_ENTRY_OFFSET_MAX) -/* - * JOURNAL_NEED_WRITE - current (pending) journal entry should be written ASAP, - * either because something's waiting on the write to complete or because it's - * been dirty too long and the timer's expired. - */ +struct journal_space { + /* Units of 512 bytes sectors: */ + unsigned next_entry; /* How big the next journal entry can be */ + unsigned total; +}; + +enum journal_space_from { + journal_space_discarded, + journal_space_clean_ondisk, + journal_space_clean, + journal_space_total, + journal_space_nr, +}; -enum { +enum journal_flags { JOURNAL_REPLAY_DONE, JOURNAL_STARTED, - JOURNAL_RECLAIM_STARTED, - JOURNAL_NEED_WRITE, - JOURNAL_NOT_EMPTY, - JOURNAL_MAY_GET_UNRESERVED, + JOURNAL_MAY_SKIP_FLUSH, + JOURNAL_NEED_FLUSH_WRITE, +}; + +/* Reasons we may fail to get a journal reservation: */ +#define JOURNAL_ERRORS() \ + x(ok) \ + x(blocked) \ + x(max_in_flight) \ + x(journal_full) \ + x(journal_pin_full) \ + x(journal_stuck) \ + x(insufficient_devices) + +enum journal_errors { +#define x(n) JOURNAL_ERR_##n, + JOURNAL_ERRORS() +#undef x }; +typedef DARRAY(u64) darray_u64; + /* Embedded in struct bch_fs */ struct journal { /* Fastpath stuff up front: */ - - unsigned long flags; + struct { union journal_res_state reservations; + enum bch_watermark watermark; + + } __aligned(SMP_CACHE_BYTES); + + unsigned long flags; /* Max size of current journal entry */ unsigned cur_entry_u64s; unsigned cur_entry_sectors; + /* Reserved space in journal entry to be used just prior to write */ + unsigned entry_u64s_reserved; + + /* * 0, or -ENOSPC if waiting on journal reclaim, or -EROFS if * insufficient devices: */ - int cur_entry_error; - - union journal_preres_state prereserved; - - /* Reserved space in journal entry to be used just prior to write */ - unsigned entry_u64s_reserved; + enum journal_errors cur_entry_error; unsigned buf_size_want; + /* + * We may queue up some things to be journalled (log messages) before + * the journal has actually started - stash them here: + */ + darray_u64 early_journal_entries; + /* + * Protects journal_buf->data, when accessing without a jorunal + * reservation: for synchronization between the btree write buffer code + * and the journal write path: + */ + struct mutex buf_lock; /* * Two journal entries -- one is currently open for new entries, the * other is possibly being written out. */ - struct journal_buf buf[2]; + struct journal_buf buf[JOURNAL_BUF_NR]; spinlock_t lock; @@ -170,7 +202,6 @@ struct journal { /* Used when waiting because the journal was full */ wait_queue_head_t wait; struct closure_waitlist async_wait; - struct closure_waitlist preres_wait; struct closure io; struct delayed_work write_work; @@ -180,7 +211,10 @@ struct journal { /* seq, last_seq from the most recent journal entry successfully written */ u64 seq_ondisk; + u64 flushed_seq_ondisk; u64 last_seq_ondisk; + u64 err_seq; + u64 last_empty_seq; /* * FIFO of journal entries whose btree updates have not yet been @@ -203,38 +237,56 @@ struct journal { struct journal_entry_pin_list *data; } pin; + struct journal_space space[journal_space_nr]; + u64 replay_journal_seq; u64 replay_journal_seq_end; struct write_point wp; spinlock_t err_lock; - struct delayed_work reclaim_work; struct mutex reclaim_lock; + /* + * Used for waiting until journal reclaim has freed up space in the + * journal: + */ + wait_queue_head_t reclaim_wait; + struct task_struct *reclaim_thread; + bool reclaim_kicked; + unsigned long next_reclaim; + u64 nr_direct_reclaim; + u64 nr_background_reclaim; + unsigned long last_flushed; struct journal_entry_pin *flush_in_progress; + bool flush_in_progress_dropped; wait_queue_head_t pin_flush_wait; /* protects advancing ja->discard_idx: */ struct mutex discard_lock; bool can_discard; - unsigned write_delay_ms; - unsigned reclaim_delay_ms; + unsigned long last_flush_write; - u64 res_get_blocked_start; - u64 need_write_time; u64 write_start_time; - struct time_stats *write_time; - struct time_stats *delay_time; - struct time_stats *blocked_time; - struct time_stats *flush_seq_time; + u64 nr_flush_writes; + u64 nr_noflush_writes; + u64 entry_bytes_written; + + u64 low_on_space_start; + u64 low_on_pin_start; + u64 max_in_flight_start; + u64 write_buffer_full_start; + + struct bch2_time_stats *flush_write_time; + struct bch2_time_stats *noflush_write_time; + struct bch2_time_stats *flush_seq_time; #ifdef CONFIG_DEBUG_LOCK_ALLOC struct lockdep_map res_map; #endif -}; +} __aligned(SMP_CACHE_BYTES); /* * Embedded in struct bch_dev. First three fields refer to the array of journal