-#ifndef _BCACHE_UTIL_H
-#define _BCACHE_UTIL_H
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _BCACHEFS_UTIL_H
+#define _BCACHEFS_UTIL_H
#include <linux/bio.h>
#include <linux/blkdev.h>
#include <linux/closure.h>
+#include <linux/darray.h>
#include <linux/errno.h>
-#include <linux/blkdev.h>
#include <linux/freezer.h>
#include <linux/kernel.h>
#include <linux/llist.h>
#include <linux/log2.h>
+#include <linux/percpu.h>
+#include <linux/preempt.h>
#include <linux/ratelimit.h>
+#include <linux/sched/clock.h>
#include <linux/slab.h>
+#include <linux/time_stats.h>
#include <linux/vmalloc.h>
#include <linux/workqueue.h>
-
-#define PAGE_SECTOR_SHIFT (PAGE_SHIFT - 9)
-#define PAGE_SECTORS (1UL << PAGE_SECTOR_SHIFT)
+#include <linux/mean_and_variance.h>
struct closure;
#ifdef CONFIG_BCACHEFS_DEBUG
-
#define EBUG_ON(cond) BUG_ON(cond)
-#define atomic_dec_bug(v) BUG_ON(atomic_dec_return(v) < 0)
-#define atomic_inc_bug(v, i) BUG_ON(atomic_inc_return(v) <= i)
-#define atomic_sub_bug(i, v) BUG_ON(atomic_sub_return(i, v) < 0)
-#define atomic_add_bug(i, v) BUG_ON(atomic_add_return(i, v) < 0)
-#define atomic_long_dec_bug(v) BUG_ON(atomic_long_dec_return(v) < 0)
-#define atomic_long_sub_bug(i, v) BUG_ON(atomic_long_sub_return(i, v) < 0)
-#define atomic64_dec_bug(v) BUG_ON(atomic64_dec_return(v) < 0)
-#define atomic64_inc_bug(v, i) BUG_ON(atomic64_inc_return(v) <= i)
-#define atomic64_sub_bug(i, v) BUG_ON(atomic64_sub_return(i, v) < 0)
-#define atomic64_add_bug(i, v) BUG_ON(atomic64_add_return(i, v) < 0)
-
-#define memcpy(_dst, _src, _len) \
-do { \
- BUG_ON(!((void *) (_dst) >= (void *) (_src) + (_len) || \
- (void *) (_dst) + (_len) <= (void *) (_src))); \
- memcpy(_dst, _src, _len); \
-} while (0)
-
-#else /* DEBUG */
-
-#define EBUG_ON(cond)
-#define atomic_dec_bug(v) atomic_dec(v)
-#define atomic_inc_bug(v, i) atomic_inc(v)
-#define atomic_sub_bug(i, v) atomic_sub(i, v)
-#define atomic_add_bug(i, v) atomic_add(i, v)
-#define atomic_long_dec_bug(v) atomic_long_dec(v)
-#define atomic_long_sub_bug(i, v) atomic_long_sub(i, v)
-#define atomic64_dec_bug(v) atomic64_dec(v)
-#define atomic64_inc_bug(v, i) atomic64_inc(v)
-#define atomic64_sub_bug(i, v) atomic64_sub(i, v)
-#define atomic64_add_bug(i, v) atomic64_add(i, v)
-
-#endif
-
-#ifndef __CHECKER__
-#define __flatten __attribute__((flatten))
#else
-/* sparse doesn't know about attribute((flatten)) */
-#define __flatten
+#define EBUG_ON(cond)
#endif
-#ifdef __LITTLE_ENDIAN
+#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
#define CPU_BIG_ENDIAN 0
-#else
+#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
#define CPU_BIG_ENDIAN 1
#endif
(__builtin_types_compatible_p(typeof(_val), _type) || \
__builtin_types_compatible_p(typeof(_val), const _type))
-static inline void kvpfree(void *p, size_t size)
+/* Userspace doesn't align allocations as nicely as the kernel allocators: */
+static inline size_t buf_pages(void *p, size_t len)
{
- if (size < PAGE_SIZE)
- kfree(p);
- else if (is_vmalloc_addr(p))
- vfree(p);
- else
- free_pages((unsigned long) p, get_order(size));
-
+ return DIV_ROUND_UP(len +
+ ((unsigned long) p & (PAGE_SIZE - 1)),
+ PAGE_SIZE);
}
-static inline void *kvpmalloc(size_t size, gfp_t gfp_mask)
-{
- return size < PAGE_SIZE ? kmalloc(size, gfp_mask)
- : (void *) __get_free_pages(gfp_mask|__GFP_NOWARN,
- get_order(size))
- ?: __vmalloc(size, gfp_mask, PAGE_KERNEL);
+#define HEAP(type) \
+struct { \
+ size_t size, used; \
+ type *data; \
}
-#define DECLARE_HEAP(type, name) \
- struct { \
- size_t size, used; \
- type *data; \
- } name
+#define DECLARE_HEAP(type, name) HEAP(type) name
#define init_heap(heap, _size, gfp) \
({ \
(heap)->used = 0; \
(heap)->size = (_size); \
- (heap)->data = kvpmalloc((heap)->size * sizeof((heap)->data[0]),\
+ (heap)->data = kvmalloc((heap)->size * sizeof((heap)->data[0]),\
(gfp)); \
})
#define free_heap(heap) \
do { \
- kvpfree((heap)->data, (heap)->size * sizeof((heap)->data[0])); \
+ kvfree((heap)->data); \
(heap)->data = NULL; \
} while (0)
-#define heap_swap(h, i, j) swap((h)->data[i], (h)->data[j])
+#define heap_set_backpointer(h, i, _fn) \
+do { \
+ void (*fn)(typeof(h), size_t) = _fn; \
+ if (fn) \
+ fn(h, i); \
+} while (0)
-#define heap_sift(h, i, cmp) \
+#define heap_swap(h, i, j, set_backpointer) \
do { \
- size_t _r, _j = i; \
+ swap((h)->data[i], (h)->data[j]); \
+ heap_set_backpointer(h, i, set_backpointer); \
+ heap_set_backpointer(h, j, set_backpointer); \
+} while (0)
+
+#define heap_peek(h) \
+({ \
+ EBUG_ON(!(h)->used); \
+ (h)->data[0]; \
+})
+
+#define heap_full(h) ((h)->used == (h)->size)
+
+#define heap_sift_down(h, i, cmp, set_backpointer) \
+do { \
+ size_t _c, _j = i; \
\
- for (; _j * 2 + 1 < (h)->used; _j = _r) { \
- _r = _j * 2 + 1; \
- if (_r + 1 < (h)->used && \
- cmp((h)->data[_r], (h)->data[_r + 1])) \
- _r++; \
+ for (; _j * 2 + 1 < (h)->used; _j = _c) { \
+ _c = _j * 2 + 1; \
+ if (_c + 1 < (h)->used && \
+ cmp(h, (h)->data[_c], (h)->data[_c + 1]) >= 0) \
+ _c++; \
\
- if (cmp((h)->data[_r], (h)->data[_j])) \
+ if (cmp(h, (h)->data[_c], (h)->data[_j]) >= 0) \
break; \
- heap_swap(h, _r, _j); \
+ heap_swap(h, _c, _j, set_backpointer); \
} \
} while (0)
-#define heap_sift_down(h, i, cmp) \
+#define heap_sift_up(h, i, cmp, set_backpointer) \
do { \
while (i) { \
size_t p = (i - 1) / 2; \
- if (cmp((h)->data[i], (h)->data[p])) \
+ if (cmp(h, (h)->data[i], (h)->data[p]) >= 0) \
break; \
- heap_swap(h, i, p); \
+ heap_swap(h, i, p, set_backpointer); \
i = p; \
} \
} while (0)
-#define heap_add(h, d, cmp) \
+#define __heap_add(h, d, cmp, set_backpointer) \
({ \
- bool _r = !heap_full(h); \
- if (_r) { \
- size_t _i = (h)->used++; \
- (h)->data[_i] = d; \
+ size_t _i = (h)->used++; \
+ (h)->data[_i] = d; \
+ heap_set_backpointer(h, _i, set_backpointer); \
\
- heap_sift_down(h, _i, cmp); \
- heap_sift(h, _i, cmp); \
- } \
+ heap_sift_up(h, _i, cmp, set_backpointer); \
+ _i; \
+})
+
+#define heap_add(h, d, cmp, set_backpointer) \
+({ \
+ bool _r = !heap_full(h); \
+ if (_r) \
+ __heap_add(h, d, cmp, set_backpointer); \
_r; \
})
-#define heap_del(h, i, cmp) \
+#define heap_add_or_replace(h, new, cmp, set_backpointer) \
+do { \
+ if (!heap_add(h, new, cmp, set_backpointer) && \
+ cmp(h, new, heap_peek(h)) >= 0) { \
+ (h)->data[0] = new; \
+ heap_set_backpointer(h, 0, set_backpointer); \
+ heap_sift_down(h, 0, cmp, set_backpointer); \
+ } \
+} while (0)
+
+#define heap_del(h, i, cmp, set_backpointer) \
do { \
size_t _i = (i); \
\
BUG_ON(_i >= (h)->used); \
(h)->used--; \
- heap_swap(h, _i, (h)->used); \
- heap_sift_down(h, _i, cmp); \
- heap_sift(h, _i, cmp); \
+ if ((_i) < (h)->used) { \
+ heap_swap(h, _i, (h)->used, set_backpointer); \
+ heap_sift_up(h, _i, cmp, set_backpointer); \
+ heap_sift_down(h, _i, cmp, set_backpointer); \
+ } \
} while (0)
-#define heap_pop(h, d, cmp) \
+#define heap_pop(h, d, cmp, set_backpointer) \
({ \
bool _r = (h)->used; \
if (_r) { \
(d) = (h)->data[0]; \
- heap_del(h, 0, cmp); \
+ heap_del(h, 0, cmp, set_backpointer); \
} \
_r; \
})
-#define heap_peek(h) \
-({ \
- EBUG_ON(!(h)->used); \
- (h)->data[0]; \
-})
-
-#define heap_full(h) ((h)->used == (h)->size)
-
-#define heap_resort(heap, cmp) \
+#define heap_resort(heap, cmp, set_backpointer) \
do { \
ssize_t _i; \
for (_i = (ssize_t) (heap)->used / 2 - 1; _i >= 0; --_i) \
- heap_sift(heap, _i, cmp); \
+ heap_sift_down(heap, _i, cmp, set_backpointer); \
} while (0)
-/*
- * Simple array based allocator - preallocates a number of elements and you can
- * never allocate more than that, also has no locking.
- *
- * Handy because if you know you only need a fixed number of elements you don't
- * have to worry about memory allocation failure, and sometimes a mempool isn't
- * what you want.
- *
- * We treat the free elements as entries in a singly linked list, and the
- * freelist as a stack - allocating and freeing push and pop off the freelist.
- */
-
-#define DECLARE_ARRAY_ALLOCATOR(type, name, size) \
- struct { \
- type *freelist; \
- type data[size]; \
- } name
-
-#define array_alloc(array) \
-({ \
- typeof((array)->freelist) _ret = (array)->freelist; \
- \
- if (_ret) \
- (array)->freelist = *((typeof((array)->freelist) *) _ret);\
- \
- _ret; \
-})
+#define ANYSINT_MAX(t) \
+ ((((t) 1 << (sizeof(t) * 8 - 2)) - (t) 1) * (t) 2 + (t) 1)
-#define array_free(array, ptr) \
-do { \
- typeof((array)->freelist) _ptr = ptr; \
- \
- *((typeof((array)->freelist) *) _ptr) = (array)->freelist; \
- (array)->freelist = _ptr; \
-} while (0)
+#include "printbuf.h"
-#define array_allocator_init(array) \
-do { \
- typeof((array)->freelist) _i; \
- \
- BUILD_BUG_ON(sizeof((array)->data[0]) < sizeof(void *)); \
- (array)->freelist = NULL; \
- \
- for (_i = (array)->data; \
- _i < (array)->data + ARRAY_SIZE((array)->data); \
- _i++) \
- array_free(array, _i); \
-} while (0)
+#define prt_vprintf(_out, ...) bch2_prt_vprintf(_out, __VA_ARGS__)
+#define prt_printf(_out, ...) bch2_prt_printf(_out, __VA_ARGS__)
+#define printbuf_str(_buf) bch2_printbuf_str(_buf)
+#define printbuf_exit(_buf) bch2_printbuf_exit(_buf)
-#define array_freelist_empty(array) ((array)->freelist == NULL)
+#define printbuf_tabstops_reset(_buf) bch2_printbuf_tabstops_reset(_buf)
+#define printbuf_tabstop_pop(_buf) bch2_printbuf_tabstop_pop(_buf)
+#define printbuf_tabstop_push(_buf, _n) bch2_printbuf_tabstop_push(_buf, _n)
-#define ANYSINT_MAX(t) \
- ((((t) 1 << (sizeof(t) * 8 - 2)) - (t) 1) * (t) 2 + (t) 1)
+#define printbuf_indent_add(_out, _n) bch2_printbuf_indent_add(_out, _n)
+#define printbuf_indent_sub(_out, _n) bch2_printbuf_indent_sub(_out, _n)
+
+#define prt_newline(_out) bch2_prt_newline(_out)
+#define prt_tab(_out) bch2_prt_tab(_out)
+#define prt_tab_rjust(_out) bch2_prt_tab_rjust(_out)
+
+#define prt_bytes_indented(...) bch2_prt_bytes_indented(__VA_ARGS__)
+#define prt_u64(_out, _v) prt_printf(_out, "%llu", (u64) (_v))
+#define prt_human_readable_u64(...) bch2_prt_human_readable_u64(__VA_ARGS__)
+#define prt_human_readable_s64(...) bch2_prt_human_readable_s64(__VA_ARGS__)
+#define prt_units_u64(...) bch2_prt_units_u64(__VA_ARGS__)
+#define prt_units_s64(...) bch2_prt_units_s64(__VA_ARGS__)
+#define prt_string_option(...) bch2_prt_string_option(__VA_ARGS__)
+#define prt_bitflags(...) bch2_prt_bitflags(__VA_ARGS__)
+#define prt_bitflags_vector(...) bch2_prt_bitflags_vector(__VA_ARGS__)
+
+void bch2_pr_time_units(struct printbuf *, u64);
+void bch2_prt_datetime(struct printbuf *, time64_t);
+
+#ifdef __KERNEL__
+static inline void uuid_unparse_lower(u8 *uuid, char *out)
+{
+ sprintf(out, "%pUb", uuid);
+}
+#else
+#include <uuid/uuid.h>
+#endif
+
+static inline void pr_uuid(struct printbuf *out, u8 *uuid)
+{
+ char uuid_str[40];
+
+ uuid_unparse_lower(uuid, uuid_str);
+ prt_printf(out, "%s", uuid_str);
+}
int bch2_strtoint_h(const char *, int *);
int bch2_strtouint_h(const char *, unsigned int *);
int bch2_strtoll_h(const char *, long long *);
int bch2_strtoull_h(const char *, unsigned long long *);
+int bch2_strtou64_h(const char *, u64 *);
static inline int bch2_strtol_h(const char *cp, long *res)
{
_r; \
})
-#define snprint(buf, size, var) \
- snprintf(buf, size, \
+#define snprint(out, var) \
+ prt_printf(out, \
type_is(var, int) ? "%i\n" \
: type_is(var, unsigned) ? "%u\n" \
: type_is(var, long) ? "%li\n" \
: type_is(var, char *) ? "%s\n" \
: "%i\n", var)
-ssize_t bch2_hprint(char *buf, s64 v);
-
bool bch2_is_zero(const void *, size_t);
-ssize_t bch2_snprint_string_list(char *buf, size_t size, const char * const list[],
- size_t selected);
+u64 bch2_read_flag_list(char *, const char * const[]);
-ssize_t bch2_read_string_list(const char *buf, const char * const list[]);
+void bch2_prt_u64_base2_nbits(struct printbuf *, u64, unsigned);
+void bch2_prt_u64_base2(struct printbuf *, u64);
-struct time_stats {
- spinlock_t lock;
- u64 count;
- /*
- * all fields are in nanoseconds, averages are ewmas stored left shifted
- * by 8
- */
- u64 last_duration;
- u64 max_duration;
- u64 average_duration;
- u64 average_frequency;
- u64 last;
-};
+void bch2_print_string_as_lines(const char *prefix, const char *lines);
-void bch2_time_stats_clear(struct time_stats *stats);
-void __bch2_time_stats_update(struct time_stats *stats, u64 time);
-void bch2_time_stats_update(struct time_stats *stats, u64 time);
+typedef DARRAY(unsigned long) bch_stacktrace;
+int bch2_save_backtrace(bch_stacktrace *stack, struct task_struct *, unsigned, gfp_t);
+void bch2_prt_backtrace(struct printbuf *, bch_stacktrace *);
+int bch2_prt_task_backtrace(struct printbuf *, struct task_struct *, unsigned, gfp_t);
-static inline unsigned local_clock_us(void)
+static inline void prt_bdevname(struct printbuf *out, struct block_device *bdev)
{
- return local_clock() >> 10;
+#ifdef __KERNEL__
+ prt_printf(out, "%pg", bdev);
+#else
+ prt_str(out, bdev->name);
+#endif
}
-#define NSEC_PER_ns 1L
-#define NSEC_PER_us NSEC_PER_USEC
-#define NSEC_PER_ms NSEC_PER_MSEC
-#define NSEC_PER_sec NSEC_PER_SEC
-
-#define __print_time_stat(stats, name, stat, units) \
- sysfs_print(name ## _ ## stat ## _ ## units, \
- div_u64((stats)->stat >> 8, NSEC_PER_ ## units))
-
-#define sysfs_print_time_stats(stats, name, \
- frequency_units, \
- duration_units) \
-do { \
- __print_time_stat(stats, name, \
- average_frequency, frequency_units); \
- __print_time_stat(stats, name, \
- average_duration, duration_units); \
- sysfs_print(name ## _ ##count, (stats)->count); \
- sysfs_print(name ## _ ##last_duration ## _ ## duration_units, \
- div_u64((stats)->last_duration, \
- NSEC_PER_ ## duration_units)); \
- sysfs_print(name ## _ ##max_duration ## _ ## duration_units, \
- div_u64((stats)->max_duration, \
- NSEC_PER_ ## duration_units)); \
- \
- sysfs_print(name ## _last_ ## frequency_units, (stats)->last \
- ? div_s64(local_clock() - (stats)->last, \
- NSEC_PER_ ## frequency_units) \
- : -1LL); \
-} while (0)
-
-#define sysfs_clear_time_stats(stats, name) \
-do { \
- if (attr == &sysfs_ ## name ## _clear) \
- bch2_time_stats_clear(stats); \
-} while (0)
-
-#define sysfs_time_stats_attribute(name, \
- frequency_units, \
- duration_units) \
-write_attribute(name ## _clear); \
-read_attribute(name ## _count); \
-read_attribute(name ## _average_frequency_ ## frequency_units); \
-read_attribute(name ## _average_duration_ ## duration_units); \
-read_attribute(name ## _last_duration_ ## duration_units); \
-read_attribute(name ## _max_duration_ ## duration_units); \
-read_attribute(name ## _last_ ## frequency_units)
-
-#define sysfs_time_stats_attribute_list(name, \
- frequency_units, \
- duration_units) \
-&sysfs_ ## name ## _clear, \
-&sysfs_ ## name ## _count, \
-&sysfs_ ## name ## _average_frequency_ ## frequency_units, \
-&sysfs_ ## name ## _average_duration_ ## duration_units, \
-&sysfs_ ## name ## _last_duration_ ## duration_units, \
-&sysfs_ ## name ## _max_duration_ ## duration_units, \
-&sysfs_ ## name ## _last_ ## frequency_units,
+void bch2_time_stats_to_text(struct printbuf *, struct time_stats *);
#define ewma_add(ewma, val, weight) \
({ \
u64 bch2_ratelimit_delay(struct bch_ratelimit *);
void bch2_ratelimit_increment(struct bch_ratelimit *, u64);
-int bch2_ratelimit_wait_freezable_stoppable(struct bch_ratelimit *);
struct bch_pd_controller {
struct bch_ratelimit rate;
s64 last_change;
s64 last_target;
- /* If true, the rate will not increase if bch2_ratelimit_delay()
- * is not being called often enough. */
+ /*
+ * If true, the rate will not increase if bch2_ratelimit_delay()
+ * is not being called often enough.
+ */
bool backpressure;
};
void bch2_pd_controller_update(struct bch_pd_controller *, s64, s64, int);
void bch2_pd_controller_init(struct bch_pd_controller *);
-size_t bch2_pd_controller_print_debug(struct bch_pd_controller *, char *);
+void bch2_pd_controller_debug_to_text(struct printbuf *, struct bch_pd_controller *);
#define sysfs_pd_controller_attribute(name) \
rw_attribute(name##_rate); \
sysfs_print(name##_rate_p_term_inverse, (var)->p_term_inverse); \
\
if (attr == &sysfs_##name##_rate_debug) \
- return bch2_pd_controller_print_debug(var, buf); \
+ bch2_pd_controller_debug_to_text(out, var); \
} while (0)
#define sysfs_pd_controller_store(name, var) \
(var)->p_term_inverse, 1, INT_MAX); \
} while (0)
-#define __DIV_SAFE(n, d, zero) \
-({ \
- typeof(n) _n = (n); \
- typeof(d) _d = (d); \
- _d ? _n / _d : zero; \
-})
-
-#define DIV_SAFE(n, d) __DIV_SAFE(n, d, 0)
-
#define container_of_or_null(ptr, type, member) \
({ \
typeof(ptr) _ptr = ptr; \
_ptr ? container_of(_ptr, type, member) : NULL; \
})
-#define RB_INSERT(root, new, member, cmp) \
-({ \
- __label__ dup; \
- struct rb_node **n = &(root)->rb_node, *parent = NULL; \
- typeof(new) this; \
- int res, ret = -1; \
- \
- while (*n) { \
- parent = *n; \
- this = container_of(*n, typeof(*(new)), member); \
- res = cmp(new, this); \
- if (!res) \
- goto dup; \
- n = res < 0 \
- ? &(*n)->rb_left \
- : &(*n)->rb_right; \
- } \
- \
- rb_link_node(&(new)->member, parent, n); \
- rb_insert_color(&(new)->member, root); \
- ret = 0; \
-dup: \
- ret; \
-})
-
-#define RB_SEARCH(root, search, member, cmp) \
-({ \
- struct rb_node *n = (root)->rb_node; \
- typeof(&(search)) this, ret = NULL; \
- int res; \
- \
- while (n) { \
- this = container_of(n, typeof(search), member); \
- res = cmp(&(search), this); \
- if (!res) { \
- ret = this; \
- break; \
- } \
- n = res < 0 \
- ? n->rb_left \
- : n->rb_right; \
- } \
- ret; \
-})
-
-#define RB_GREATER(root, search, member, cmp) \
-({ \
- struct rb_node *n = (root)->rb_node; \
- typeof(&(search)) this, ret = NULL; \
- int res; \
- \
- while (n) { \
- this = container_of(n, typeof(search), member); \
- res = cmp(&(search), this); \
- if (res < 0) { \
- ret = this; \
- n = n->rb_left; \
- } else \
- n = n->rb_right; \
- } \
- ret; \
-})
-
-#define RB_FIRST(root, type, member) \
- container_of_or_null(rb_first(root), type, member)
-
-#define RB_LAST(root, type, member) \
- container_of_or_null(rb_last(root), type, member)
-
-#define RB_NEXT(ptr, member) \
- container_of_or_null(rb_next(&(ptr)->member), typeof(*ptr), member)
-
-#define RB_PREV(ptr, member) \
- container_of_or_null(rb_prev(&(ptr)->member), typeof(*ptr), member)
-
/* Does linear interpolation between powers of two */
static inline unsigned fract_exp_two(unsigned x, unsigned fract_bits)
{
return x;
}
-void bch2_bio_map(struct bio *bio, void *base);
+void bch2_bio_map(struct bio *bio, void *base, size_t);
+int bch2_bio_alloc_pages(struct bio *, size_t, gfp_t);
static inline sector_t bdev_sectors(struct block_device *bdev)
{
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; \
size_t bch2_rand_range(size_t);
-void memcpy_to_bio(struct bio *, struct bvec_iter, void *);
+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)
__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)
{
#ifdef CONFIG_X86_64
long d0, d1, d2;
+
asm volatile("std ;\n"
"rep ; movsq\n"
"cld ;\n"
__memmove_u64s_up(dst, src, u64s);
}
-static inline struct bio_vec next_contig_bvec(struct bio *bio,
- struct bvec_iter *iter)
+/* 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)
{
- struct bio_vec bv = bio_iter_iovec(bio, *iter);
+ unsigned rem = round_up(bytes, sizeof(u64)) - bytes;
- bio_advance_iter(bio, iter, bv.bv_len);
-#ifndef CONFIG_HIGHMEM
- while (iter->bi_size) {
- struct bio_vec next = bio_iter_iovec(bio, *iter);
+ memset(s + bytes, c, rem);
+}
+
+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 (page_address(bv.bv_page) + bv.bv_offset + bv.bv_len !=
- page_address(next.bv_page) + next.bv_offset)
- break;
+ if (new_gap < old_gap) {
+ size_t move = old_gap - new_gap;
- bv.bv_len += next.bv_len;
- bio_advance_iter(bio, iter, next.bv_len);
+ 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);
}
-#endif
- return bv;
}
-#define __bio_for_each_contig_segment(bv, bio, iter, start) \
- for (iter = (start); \
- (iter).bi_size && \
- ((bv = next_contig_bvec((bio), &(iter))), 1);)
+/* Move the gap in a gap buffer: */
+#define move_gap(_array, _nr, _size, _old_gap, _new_gap) \
+ __move_gap(_array, sizeof(_array[0]), _nr, _size, _old_gap, _new_gap)
+
+#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;
-#define bio_for_each_contig_segment(bv, bio, iter) \
- __bio_for_each_contig_segment(bv, bio, iter, (bio)->bi_iter)
+ 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);
+}
-size_t bch_scnmemcpy(char *, size_t, const char *, size_t);
+void bch2_darray_str_exit(darray_str *);
+int bch2_split_devs(const char *, darray_str *);
-#endif /* _BCACHE_UTIL_H */
+#endif /* _BCACHEFS_UTIL_H */
projects / bcachefs-tools-debian / blobdiff