| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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| 2 | #ifndef _BCACHEFS_CLOCK_TYPES_H |
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| 3 | #define _BCACHEFS_CLOCK_TYPES_H |
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| 4 | |
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| 5 | #include "util.h" |
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| 6 | |
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| 7 | #define NR_IO_TIMERS (BCH_SB_MEMBERS_MAX * 3) |
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| 8 | |
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| 9 | /* |
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| 10 | * Clocks/timers in units of sectors of IO: |
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| 11 | * |
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| 12 | * Note - they use percpu batching, so they're only approximate. |
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| 13 | */ |
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| 14 | |
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| 15 | struct io_timer; |
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| 16 | typedef void (*io_timer_fn)(struct io_timer *); |
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| 17 | |
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| 18 | struct io_timer { |
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| 19 | io_timer_fn fn; |
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| 20 | unsigned long expire; |
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| 21 | }; |
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| 22 | |
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| 23 | /* Amount to buffer up on a percpu counter */ |
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| 24 | #define IO_CLOCK_PCPU_SECTORS 128 |
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| 25 | |
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| 26 | typedef HEAP(struct io_timer *) io_timer_heap; |
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| 27 | |
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| 28 | struct io_clock { |
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| 29 | atomic64_t now; |
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| 30 | u16 __percpu *pcpu_buf; |
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| 31 | unsigned max_slop; |
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| 32 | |
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| 33 | spinlock_t timer_lock; |
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| 34 | io_timer_heap timers; |
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| 35 | }; |
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| 36 | |
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| 37 | #endif /* _BCACHEFS_CLOCK_TYPES_H */ |
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| 38 | |
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