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https://github.com/torvalds/linux.git
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6088234ce8
"bcachefs; Fix deadlock in bch2_btree_update_start()" was a significant performance regression (nearly 50%) on multithreaded random writes with fio. The reason is that the journal watermark checks multiple things, including the state of the btree write buffer, and on multithreaded update heavy workloads we're bottleneked on write buffer flushing - we don't want kicknig off btree updates to depend on the state of the write buffer. This isn't strictly correct; the interior btree update path does do write buffer updates, but it's a tiny fraction of total accounting updates and we're more concerned with space in the journal itself. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
815 lines
20 KiB
C++
815 lines
20 KiB
C++
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _BCACHEFS_UTIL_H
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#define _BCACHEFS_UTIL_H
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#include <linux/bio.h>
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#include <linux/blkdev.h>
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#include <linux/closure.h>
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#include <linux/errno.h>
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#include <linux/freezer.h>
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#include <linux/kernel.h>
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#include <linux/sched/clock.h>
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#include <linux/llist.h>
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#include <linux/log2.h>
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#include <linux/percpu.h>
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#include <linux/preempt.h>
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#include <linux/ratelimit.h>
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#include <linux/slab.h>
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#include <linux/vmalloc.h>
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#include <linux/workqueue.h>
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#include "mean_and_variance.h"
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#include "darray.h"
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#include "time_stats.h"
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struct closure;
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#ifdef CONFIG_BCACHEFS_DEBUG
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#define EBUG_ON(cond) BUG_ON(cond)
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#else
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#define EBUG_ON(cond)
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#endif
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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#define CPU_BIG_ENDIAN 0
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#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
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#define CPU_BIG_ENDIAN 1
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#endif
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/* type hackery */
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#define type_is_exact(_val, _type) \
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__builtin_types_compatible_p(typeof(_val), _type)
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#define type_is(_val, _type) \
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(__builtin_types_compatible_p(typeof(_val), _type) || \
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__builtin_types_compatible_p(typeof(_val), const _type))
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/* Userspace doesn't align allocations as nicely as the kernel allocators: */
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static inline size_t buf_pages(void *p, size_t len)
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{
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return DIV_ROUND_UP(len +
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((unsigned long) p & (PAGE_SIZE - 1)),
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PAGE_SIZE);
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}
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#define HEAP(type) \
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struct { \
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size_t size, used; \
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type *data; \
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}
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#define DECLARE_HEAP(type, name) HEAP(type) name
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#define init_heap(heap, _size, gfp) \
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({ \
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(heap)->used = 0; \
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(heap)->size = (_size); \
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(heap)->data = kvmalloc((heap)->size * sizeof((heap)->data[0]),\
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(gfp)); \
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})
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#define free_heap(heap) \
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do { \
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kvfree((heap)->data); \
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(heap)->data = NULL; \
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} while (0)
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#define heap_set_backpointer(h, i, _fn) \
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do { \
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void (*fn)(typeof(h), size_t) = _fn; \
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if (fn) \
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fn(h, i); \
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} while (0)
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#define heap_swap(h, i, j, set_backpointer) \
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do { \
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swap((h)->data[i], (h)->data[j]); \
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heap_set_backpointer(h, i, set_backpointer); \
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heap_set_backpointer(h, j, set_backpointer); \
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} while (0)
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#define heap_peek(h) \
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({ \
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EBUG_ON(!(h)->used); \
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(h)->data[0]; \
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})
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#define heap_full(h) ((h)->used == (h)->size)
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#define heap_sift_down(h, i, cmp, set_backpointer) \
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do { \
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size_t _c, _j = i; \
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\
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for (; _j * 2 + 1 < (h)->used; _j = _c) { \
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_c = _j * 2 + 1; \
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if (_c + 1 < (h)->used && \
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cmp(h, (h)->data[_c], (h)->data[_c + 1]) >= 0) \
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_c++; \
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\
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if (cmp(h, (h)->data[_c], (h)->data[_j]) >= 0) \
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break; \
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heap_swap(h, _c, _j, set_backpointer); \
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} \
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} while (0)
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#define heap_sift_up(h, i, cmp, set_backpointer) \
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do { \
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while (i) { \
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size_t p = (i - 1) / 2; \
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if (cmp(h, (h)->data[i], (h)->data[p]) >= 0) \
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break; \
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heap_swap(h, i, p, set_backpointer); \
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i = p; \
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} \
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} while (0)
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#define __heap_add(h, d, cmp, set_backpointer) \
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({ \
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size_t _i = (h)->used++; \
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(h)->data[_i] = d; \
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heap_set_backpointer(h, _i, set_backpointer); \
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\
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heap_sift_up(h, _i, cmp, set_backpointer); \
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_i; \
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})
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#define heap_add(h, d, cmp, set_backpointer) \
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({ \
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bool _r = !heap_full(h); \
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if (_r) \
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__heap_add(h, d, cmp, set_backpointer); \
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_r; \
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})
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#define heap_add_or_replace(h, new, cmp, set_backpointer) \
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do { \
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if (!heap_add(h, new, cmp, set_backpointer) && \
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cmp(h, new, heap_peek(h)) >= 0) { \
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(h)->data[0] = new; \
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heap_set_backpointer(h, 0, set_backpointer); \
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heap_sift_down(h, 0, cmp, set_backpointer); \
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} \
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} while (0)
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#define heap_del(h, i, cmp, set_backpointer) \
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do { \
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size_t _i = (i); \
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\
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BUG_ON(_i >= (h)->used); \
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(h)->used--; \
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if ((_i) < (h)->used) { \
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heap_swap(h, _i, (h)->used, set_backpointer); \
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heap_sift_up(h, _i, cmp, set_backpointer); \
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heap_sift_down(h, _i, cmp, set_backpointer); \
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} \
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} while (0)
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#define heap_pop(h, d, cmp, set_backpointer) \
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({ \
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bool _r = (h)->used; \
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if (_r) { \
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(d) = (h)->data[0]; \
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heap_del(h, 0, cmp, set_backpointer); \
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} \
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_r; \
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})
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#define heap_resort(heap, cmp, set_backpointer) \
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do { \
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ssize_t _i; \
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for (_i = (ssize_t) (heap)->used / 2 - 1; _i >= 0; --_i) \
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heap_sift_down(heap, _i, cmp, set_backpointer); \
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} while (0)
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#define ANYSINT_MAX(t) \
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((((t) 1 << (sizeof(t) * 8 - 2)) - (t) 1) * (t) 2 + (t) 1)
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#include "printbuf.h"
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#define prt_vprintf(_out, ...) bch2_prt_vprintf(_out, __VA_ARGS__)
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#define prt_printf(_out, ...) bch2_prt_printf(_out, __VA_ARGS__)
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#define printbuf_str(_buf) bch2_printbuf_str(_buf)
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#define printbuf_exit(_buf) bch2_printbuf_exit(_buf)
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#define printbuf_tabstops_reset(_buf) bch2_printbuf_tabstops_reset(_buf)
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#define printbuf_tabstop_pop(_buf) bch2_printbuf_tabstop_pop(_buf)
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#define printbuf_tabstop_push(_buf, _n) bch2_printbuf_tabstop_push(_buf, _n)
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#define printbuf_indent_add(_out, _n) bch2_printbuf_indent_add(_out, _n)
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#define printbuf_indent_sub(_out, _n) bch2_printbuf_indent_sub(_out, _n)
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#define prt_newline(_out) bch2_prt_newline(_out)
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#define prt_tab(_out) bch2_prt_tab(_out)
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#define prt_tab_rjust(_out) bch2_prt_tab_rjust(_out)
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#define prt_bytes_indented(...) bch2_prt_bytes_indented(__VA_ARGS__)
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#define prt_u64(_out, _v) prt_printf(_out, "%llu", (u64) (_v))
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#define prt_human_readable_u64(...) bch2_prt_human_readable_u64(__VA_ARGS__)
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#define prt_human_readable_s64(...) bch2_prt_human_readable_s64(__VA_ARGS__)
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#define prt_units_u64(...) bch2_prt_units_u64(__VA_ARGS__)
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#define prt_units_s64(...) bch2_prt_units_s64(__VA_ARGS__)
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#define prt_string_option(...) bch2_prt_string_option(__VA_ARGS__)
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#define prt_bitflags(...) bch2_prt_bitflags(__VA_ARGS__)
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#define prt_bitflags_vector(...) bch2_prt_bitflags_vector(__VA_ARGS__)
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void bch2_pr_time_units(struct printbuf *, u64);
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void bch2_prt_datetime(struct printbuf *, time64_t);
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#ifdef __KERNEL__
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static inline void uuid_unparse_lower(u8 *uuid, char *out)
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{
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sprintf(out, "%pUb", uuid);
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}
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#else
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#include <uuid/uuid.h>
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#endif
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static inline void pr_uuid(struct printbuf *out, u8 *uuid)
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{
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char uuid_str[40];
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uuid_unparse_lower(uuid, uuid_str);
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prt_printf(out, "%s", uuid_str);
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}
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int bch2_strtoint_h(const char *, int *);
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int bch2_strtouint_h(const char *, unsigned int *);
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int bch2_strtoll_h(const char *, long long *);
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int bch2_strtoull_h(const char *, unsigned long long *);
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int bch2_strtou64_h(const char *, u64 *);
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static inline int bch2_strtol_h(const char *cp, long *res)
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{
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#if BITS_PER_LONG == 32
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return bch2_strtoint_h(cp, (int *) res);
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#else
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return bch2_strtoll_h(cp, (long long *) res);
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#endif
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}
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static inline int bch2_strtoul_h(const char *cp, long *res)
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{
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#if BITS_PER_LONG == 32
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return bch2_strtouint_h(cp, (unsigned int *) res);
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#else
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return bch2_strtoull_h(cp, (unsigned long long *) res);
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#endif
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}
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#define strtoi_h(cp, res) \
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( type_is(*res, int) ? bch2_strtoint_h(cp, (void *) res)\
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: type_is(*res, long) ? bch2_strtol_h(cp, (void *) res)\
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: type_is(*res, long long) ? bch2_strtoll_h(cp, (void *) res)\
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: type_is(*res, unsigned) ? bch2_strtouint_h(cp, (void *) res)\
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: type_is(*res, unsigned long) ? bch2_strtoul_h(cp, (void *) res)\
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: type_is(*res, unsigned long long) ? bch2_strtoull_h(cp, (void *) res)\
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: -EINVAL)
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#define strtoul_safe(cp, var) \
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({ \
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unsigned long _v; \
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int _r = kstrtoul(cp, 10, &_v); \
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if (!_r) \
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var = _v; \
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_r; \
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})
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#define strtoul_safe_clamp(cp, var, min, max) \
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({ \
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unsigned long _v; \
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int _r = kstrtoul(cp, 10, &_v); \
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if (!_r) \
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var = clamp_t(typeof(var), _v, min, max); \
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_r; \
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})
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#define strtoul_safe_restrict(cp, var, min, max) \
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({ \
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unsigned long _v; \
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int _r = kstrtoul(cp, 10, &_v); \
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if (!_r && _v >= min && _v <= max) \
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var = _v; \
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else \
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_r = -EINVAL; \
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_r; \
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})
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#define snprint(out, var) \
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prt_printf(out, \
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type_is(var, int) ? "%i\n" \
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: type_is(var, unsigned) ? "%u\n" \
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: type_is(var, long) ? "%li\n" \
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: type_is(var, unsigned long) ? "%lu\n" \
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: type_is(var, s64) ? "%lli\n" \
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: type_is(var, u64) ? "%llu\n" \
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: type_is(var, char *) ? "%s\n" \
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: "%i\n", var)
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bool bch2_is_zero(const void *, size_t);
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u64 bch2_read_flag_list(char *, const char * const[]);
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void bch2_prt_u64_base2_nbits(struct printbuf *, u64, unsigned);
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void bch2_prt_u64_base2(struct printbuf *, u64);
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void bch2_print_string_as_lines(const char *prefix, const char *lines);
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typedef DARRAY(unsigned long) bch_stacktrace;
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int bch2_save_backtrace(bch_stacktrace *stack, struct task_struct *, unsigned, gfp_t);
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void bch2_prt_backtrace(struct printbuf *, bch_stacktrace *);
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int bch2_prt_task_backtrace(struct printbuf *, struct task_struct *, unsigned, gfp_t);
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static inline void prt_bdevname(struct printbuf *out, struct block_device *bdev)
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{
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#ifdef __KERNEL__
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prt_printf(out, "%pg", bdev);
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#else
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prt_str(out, bdev->name);
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#endif
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}
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void bch2_time_stats_to_text(struct printbuf *, struct bch2_time_stats *);
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#define ewma_add(ewma, val, weight) \
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({ \
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typeof(ewma) _ewma = (ewma); \
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typeof(weight) _weight = (weight); \
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\
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(((_ewma << _weight) - _ewma) + (val)) >> _weight; \
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})
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struct bch_ratelimit {
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/* Next time we want to do some work, in nanoseconds */
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u64 next;
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/*
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* Rate at which we want to do work, in units per nanosecond
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* The units here correspond to the units passed to
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* bch2_ratelimit_increment()
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*/
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unsigned rate;
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};
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static inline void bch2_ratelimit_reset(struct bch_ratelimit *d)
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{
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d->next = local_clock();
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}
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u64 bch2_ratelimit_delay(struct bch_ratelimit *);
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void bch2_ratelimit_increment(struct bch_ratelimit *, u64);
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struct bch_pd_controller {
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struct bch_ratelimit rate;
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unsigned long last_update;
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s64 last_actual;
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s64 smoothed_derivative;
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unsigned p_term_inverse;
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unsigned d_smooth;
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unsigned d_term;
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/* for exporting to sysfs (no effect on behavior) */
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s64 last_derivative;
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s64 last_proportional;
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s64 last_change;
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s64 last_target;
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/*
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* If true, the rate will not increase if bch2_ratelimit_delay()
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* is not being called often enough.
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*/
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bool backpressure;
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};
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void bch2_pd_controller_update(struct bch_pd_controller *, s64, s64, int);
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void bch2_pd_controller_init(struct bch_pd_controller *);
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void bch2_pd_controller_debug_to_text(struct printbuf *, struct bch_pd_controller *);
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#define sysfs_pd_controller_attribute(name) \
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rw_attribute(name##_rate); \
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rw_attribute(name##_rate_bytes); \
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rw_attribute(name##_rate_d_term); \
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rw_attribute(name##_rate_p_term_inverse); \
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read_attribute(name##_rate_debug)
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#define sysfs_pd_controller_files(name) \
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&sysfs_##name##_rate, \
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&sysfs_##name##_rate_bytes, \
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&sysfs_##name##_rate_d_term, \
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&sysfs_##name##_rate_p_term_inverse, \
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&sysfs_##name##_rate_debug
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#define sysfs_pd_controller_show(name, var) \
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do { \
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sysfs_hprint(name##_rate, (var)->rate.rate); \
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sysfs_print(name##_rate_bytes, (var)->rate.rate); \
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sysfs_print(name##_rate_d_term, (var)->d_term); \
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sysfs_print(name##_rate_p_term_inverse, (var)->p_term_inverse); \
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\
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if (attr == &sysfs_##name##_rate_debug) \
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bch2_pd_controller_debug_to_text(out, var); \
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} while (0)
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#define sysfs_pd_controller_store(name, var) \
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do { \
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sysfs_strtoul_clamp(name##_rate, \
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(var)->rate.rate, 1, UINT_MAX); \
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sysfs_strtoul_clamp(name##_rate_bytes, \
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(var)->rate.rate, 1, UINT_MAX); \
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sysfs_strtoul(name##_rate_d_term, (var)->d_term); \
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sysfs_strtoul_clamp(name##_rate_p_term_inverse, \
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(var)->p_term_inverse, 1, INT_MAX); \
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} while (0)
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#define container_of_or_null(ptr, type, member) \
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({ \
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typeof(ptr) _ptr = ptr; \
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_ptr ? container_of(_ptr, type, member) : NULL; \
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})
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/* Does linear interpolation between powers of two */
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static inline unsigned fract_exp_two(unsigned x, unsigned fract_bits)
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{
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unsigned fract = x & ~(~0 << fract_bits);
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x >>= fract_bits;
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x = 1 << x;
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x += (x * fract) >> fract_bits;
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return x;
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}
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void bch2_bio_map(struct bio *bio, void *base, size_t);
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int bch2_bio_alloc_pages(struct bio *, size_t, gfp_t);
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static inline sector_t bdev_sectors(struct block_device *bdev)
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{
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return bdev->bd_inode->i_size >> 9;
|
|
}
|
|
|
|
#define closure_bio_submit(bio, cl) \
|
|
do { \
|
|
closure_get(cl); \
|
|
submit_bio(bio); \
|
|
} while (0)
|
|
|
|
#define kthread_wait(cond) \
|
|
({ \
|
|
int _ret = 0; \
|
|
\
|
|
while (1) { \
|
|
set_current_state(TASK_INTERRUPTIBLE); \
|
|
if (kthread_should_stop()) { \
|
|
_ret = -1; \
|
|
break; \
|
|
} \
|
|
\
|
|
if (cond) \
|
|
break; \
|
|
\
|
|
schedule(); \
|
|
} \
|
|
set_current_state(TASK_RUNNING); \
|
|
_ret; \
|
|
})
|
|
|
|
#define kthread_wait_freezable(cond) \
|
|
({ \
|
|
int _ret = 0; \
|
|
while (1) { \
|
|
set_current_state(TASK_INTERRUPTIBLE); \
|
|
if (kthread_should_stop()) { \
|
|
_ret = -1; \
|
|
break; \
|
|
} \
|
|
\
|
|
if (cond) \
|
|
break; \
|
|
\
|
|
schedule(); \
|
|
try_to_freeze(); \
|
|
} \
|
|
set_current_state(TASK_RUNNING); \
|
|
_ret; \
|
|
})
|
|
|
|
size_t bch2_rand_range(size_t);
|
|
|
|
void memcpy_to_bio(struct bio *, struct bvec_iter, const void *);
|
|
void memcpy_from_bio(void *, struct bio *, struct bvec_iter);
|
|
|
|
static inline void memcpy_u64s_small(void *dst, const void *src,
|
|
unsigned u64s)
|
|
{
|
|
u64 *d = dst;
|
|
const u64 *s = src;
|
|
|
|
while (u64s--)
|
|
*d++ = *s++;
|
|
}
|
|
|
|
static inline void __memcpy_u64s(void *dst, const void *src,
|
|
unsigned u64s)
|
|
{
|
|
#ifdef CONFIG_X86_64
|
|
long d0, d1, d2;
|
|
|
|
asm volatile("rep ; movsq"
|
|
: "=&c" (d0), "=&D" (d1), "=&S" (d2)
|
|
: "0" (u64s), "1" (dst), "2" (src)
|
|
: "memory");
|
|
#else
|
|
u64 *d = dst;
|
|
const u64 *s = src;
|
|
|
|
while (u64s--)
|
|
*d++ = *s++;
|
|
#endif
|
|
}
|
|
|
|
static inline void memcpy_u64s(void *dst, const void *src,
|
|
unsigned u64s)
|
|
{
|
|
EBUG_ON(!(dst >= src + u64s * sizeof(u64) ||
|
|
dst + u64s * sizeof(u64) <= src));
|
|
|
|
__memcpy_u64s(dst, src, u64s);
|
|
}
|
|
|
|
static inline void __memmove_u64s_down(void *dst, const void *src,
|
|
unsigned u64s)
|
|
{
|
|
__memcpy_u64s(dst, src, u64s);
|
|
}
|
|
|
|
static inline void memmove_u64s_down(void *dst, const void *src,
|
|
unsigned u64s)
|
|
{
|
|
EBUG_ON(dst > src);
|
|
|
|
__memmove_u64s_down(dst, src, u64s);
|
|
}
|
|
|
|
static inline void __memmove_u64s_down_small(void *dst, const void *src,
|
|
unsigned u64s)
|
|
{
|
|
memcpy_u64s_small(dst, src, u64s);
|
|
}
|
|
|
|
static inline void memmove_u64s_down_small(void *dst, const void *src,
|
|
unsigned u64s)
|
|
{
|
|
EBUG_ON(dst > src);
|
|
|
|
__memmove_u64s_down_small(dst, src, u64s);
|
|
}
|
|
|
|
static inline void __memmove_u64s_up_small(void *_dst, const void *_src,
|
|
unsigned u64s)
|
|
{
|
|
u64 *dst = (u64 *) _dst + u64s;
|
|
u64 *src = (u64 *) _src + u64s;
|
|
|
|
while (u64s--)
|
|
*--dst = *--src;
|
|
}
|
|
|
|
static inline void memmove_u64s_up_small(void *dst, const void *src,
|
|
unsigned u64s)
|
|
{
|
|
EBUG_ON(dst < src);
|
|
|
|
__memmove_u64s_up_small(dst, src, u64s);
|
|
}
|
|
|
|
static inline void __memmove_u64s_up(void *_dst, const void *_src,
|
|
unsigned u64s)
|
|
{
|
|
u64 *dst = (u64 *) _dst + u64s - 1;
|
|
u64 *src = (u64 *) _src + u64s - 1;
|
|
|
|
#ifdef CONFIG_X86_64
|
|
long d0, d1, d2;
|
|
|
|
asm volatile("std ;\n"
|
|
"rep ; movsq\n"
|
|
"cld ;\n"
|
|
: "=&c" (d0), "=&D" (d1), "=&S" (d2)
|
|
: "0" (u64s), "1" (dst), "2" (src)
|
|
: "memory");
|
|
#else
|
|
while (u64s--)
|
|
*dst-- = *src--;
|
|
#endif
|
|
}
|
|
|
|
static inline void memmove_u64s_up(void *dst, const void *src,
|
|
unsigned u64s)
|
|
{
|
|
EBUG_ON(dst < src);
|
|
|
|
__memmove_u64s_up(dst, src, u64s);
|
|
}
|
|
|
|
static inline void memmove_u64s(void *dst, const void *src,
|
|
unsigned u64s)
|
|
{
|
|
if (dst < src)
|
|
__memmove_u64s_down(dst, src, u64s);
|
|
else
|
|
__memmove_u64s_up(dst, src, u64s);
|
|
}
|
|
|
|
/* Set the last few bytes up to a u64 boundary given an offset into a buffer. */
|
|
static inline void memset_u64s_tail(void *s, int c, unsigned bytes)
|
|
{
|
|
unsigned rem = round_up(bytes, sizeof(u64)) - bytes;
|
|
|
|
memset(s + bytes, c, rem);
|
|
}
|
|
|
|
/* just the memmove, doesn't update @_nr */
|
|
#define __array_insert_item(_array, _nr, _pos) \
|
|
memmove(&(_array)[(_pos) + 1], \
|
|
&(_array)[(_pos)], \
|
|
sizeof((_array)[0]) * ((_nr) - (_pos)))
|
|
|
|
#define array_insert_item(_array, _nr, _pos, _new_item) \
|
|
do { \
|
|
__array_insert_item(_array, _nr, _pos); \
|
|
(_nr)++; \
|
|
(_array)[(_pos)] = (_new_item); \
|
|
} while (0)
|
|
|
|
#define array_remove_items(_array, _nr, _pos, _nr_to_remove) \
|
|
do { \
|
|
(_nr) -= (_nr_to_remove); \
|
|
memmove(&(_array)[(_pos)], \
|
|
&(_array)[(_pos) + (_nr_to_remove)], \
|
|
sizeof((_array)[0]) * ((_nr) - (_pos))); \
|
|
} while (0)
|
|
|
|
#define array_remove_item(_array, _nr, _pos) \
|
|
array_remove_items(_array, _nr, _pos, 1)
|
|
|
|
static inline void __move_gap(void *array, size_t element_size,
|
|
size_t nr, size_t size,
|
|
size_t old_gap, size_t new_gap)
|
|
{
|
|
size_t gap_end = old_gap + size - nr;
|
|
|
|
if (new_gap < old_gap) {
|
|
size_t move = old_gap - new_gap;
|
|
|
|
memmove(array + element_size * (gap_end - move),
|
|
array + element_size * (old_gap - move),
|
|
element_size * move);
|
|
} else if (new_gap > old_gap) {
|
|
size_t move = new_gap - old_gap;
|
|
|
|
memmove(array + element_size * old_gap,
|
|
array + element_size * gap_end,
|
|
element_size * move);
|
|
}
|
|
}
|
|
|
|
/* Move the gap in a gap buffer: */
|
|
#define move_gap(_d, _new_gap) \
|
|
do { \
|
|
BUG_ON(_new_gap > (_d)->nr); \
|
|
BUG_ON((_d)->gap > (_d)->nr); \
|
|
\
|
|
__move_gap((_d)->data, sizeof((_d)->data[0]), \
|
|
(_d)->nr, (_d)->size, (_d)->gap, _new_gap); \
|
|
(_d)->gap = _new_gap; \
|
|
} while (0)
|
|
|
|
#define bubble_sort(_base, _nr, _cmp) \
|
|
do { \
|
|
ssize_t _i, _last; \
|
|
bool _swapped = true; \
|
|
\
|
|
for (_last= (ssize_t) (_nr) - 1; _last > 0 && _swapped; --_last) {\
|
|
_swapped = false; \
|
|
for (_i = 0; _i < _last; _i++) \
|
|
if (_cmp((_base)[_i], (_base)[_i + 1]) > 0) { \
|
|
swap((_base)[_i], (_base)[_i + 1]); \
|
|
_swapped = true; \
|
|
} \
|
|
} \
|
|
} while (0)
|
|
|
|
static inline u64 percpu_u64_get(u64 __percpu *src)
|
|
{
|
|
u64 ret = 0;
|
|
int cpu;
|
|
|
|
for_each_possible_cpu(cpu)
|
|
ret += *per_cpu_ptr(src, cpu);
|
|
return ret;
|
|
}
|
|
|
|
static inline void percpu_u64_set(u64 __percpu *dst, u64 src)
|
|
{
|
|
int cpu;
|
|
|
|
for_each_possible_cpu(cpu)
|
|
*per_cpu_ptr(dst, cpu) = 0;
|
|
this_cpu_write(*dst, src);
|
|
}
|
|
|
|
static inline void acc_u64s(u64 *acc, const u64 *src, unsigned nr)
|
|
{
|
|
unsigned i;
|
|
|
|
for (i = 0; i < nr; i++)
|
|
acc[i] += src[i];
|
|
}
|
|
|
|
static inline void acc_u64s_percpu(u64 *acc, const u64 __percpu *src,
|
|
unsigned nr)
|
|
{
|
|
int cpu;
|
|
|
|
for_each_possible_cpu(cpu)
|
|
acc_u64s(acc, per_cpu_ptr(src, cpu), nr);
|
|
}
|
|
|
|
static inline void percpu_memset(void __percpu *p, int c, size_t bytes)
|
|
{
|
|
int cpu;
|
|
|
|
for_each_possible_cpu(cpu)
|
|
memset(per_cpu_ptr(p, cpu), c, bytes);
|
|
}
|
|
|
|
u64 *bch2_acc_percpu_u64s(u64 __percpu *, unsigned);
|
|
|
|
#define cmp_int(l, r) ((l > r) - (l < r))
|
|
|
|
static inline int u8_cmp(u8 l, u8 r)
|
|
{
|
|
return cmp_int(l, r);
|
|
}
|
|
|
|
static inline int cmp_le32(__le32 l, __le32 r)
|
|
{
|
|
return cmp_int(le32_to_cpu(l), le32_to_cpu(r));
|
|
}
|
|
|
|
#include <linux/uuid.h>
|
|
|
|
#define QSTR(n) { { { .len = strlen(n) } }, .name = n }
|
|
|
|
static inline bool qstr_eq(const struct qstr l, const struct qstr r)
|
|
{
|
|
return l.len == r.len && !memcmp(l.name, r.name, l.len);
|
|
}
|
|
|
|
void bch2_darray_str_exit(darray_str *);
|
|
int bch2_split_devs(const char *, darray_str *);
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
__must_check
|
|
static inline int copy_to_user_errcode(void __user *to, const void *from, unsigned long n)
|
|
{
|
|
return copy_to_user(to, from, n) ? -EFAULT : 0;
|
|
}
|
|
|
|
__must_check
|
|
static inline int copy_from_user_errcode(void *to, const void __user *from, unsigned long n)
|
|
{
|
|
return copy_from_user(to, from, n) ? -EFAULT : 0;
|
|
}
|
|
|
|
#endif
|
|
|
|
static inline void mod_bit(long nr, volatile unsigned long *addr, bool v)
|
|
{
|
|
if (v)
|
|
set_bit(nr, addr);
|
|
else
|
|
clear_bit(nr, addr);
|
|
}
|
|
|
|
static inline void __set_bit_le64(size_t bit, __le64 *addr)
|
|
{
|
|
addr[bit / 64] |= cpu_to_le64(BIT_ULL(bit % 64));
|
|
}
|
|
|
|
static inline void __clear_bit_le64(size_t bit, __le64 *addr)
|
|
{
|
|
addr[bit / 64] &= ~cpu_to_le64(BIT_ULL(bit % 64));
|
|
}
|
|
|
|
static inline bool test_bit_le64(size_t bit, __le64 *addr)
|
|
{
|
|
return (addr[bit / 64] & cpu_to_le64(BIT_ULL(bit % 64))) != 0;
|
|
}
|
|
|
|
#endif /* _BCACHEFS_UTIL_H */
|