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-rw-r--r--fs/bcachefs/util.h93
1 files changed, 87 insertions, 6 deletions
diff --git a/fs/bcachefs/util.h b/fs/bcachefs/util.h
index fb02c1c36004..3e52c7f8ddd2 100644
--- a/fs/bcachefs/util.h
+++ b/fs/bcachefs/util.h
@@ -55,6 +55,16 @@ static inline size_t buf_pages(void *p, size_t len)
PAGE_SIZE);
}
+static inline void *bch2_kvmalloc(size_t n, gfp_t flags)
+{
+ void *p = unlikely(n >= INT_MAX)
+ ? vmalloc(n)
+ : kvmalloc(n, flags & ~__GFP_ZERO);
+ if (p && (flags & __GFP_ZERO))
+ memset(p, 0, n);
+ return p;
+}
+
#define init_heap(heap, _size, gfp) \
({ \
(heap)->nr = 0; \
@@ -84,6 +94,7 @@ do { \
#define printbuf_tabstop_push(_buf, _n) bch2_printbuf_tabstop_push(_buf, _n)
#define printbuf_indent_add(_out, _n) bch2_printbuf_indent_add(_out, _n)
+#define printbuf_indent_add_nextline(_out, _n) bch2_printbuf_indent_add_nextline(_out, _n)
#define printbuf_indent_sub(_out, _n) bch2_printbuf_indent_sub(_out, _n)
#define prt_newline(_out) bch2_prt_newline(_out)
@@ -317,6 +328,19 @@ do { \
_ptr ? container_of(_ptr, type, member) : NULL; \
})
+static inline struct list_head *list_pop(struct list_head *head)
+{
+ if (list_empty(head))
+ return NULL;
+
+ struct list_head *ret = head->next;
+ list_del_init(ret);
+ return ret;
+}
+
+#define list_pop_entry(head, type, member) \
+ container_of_or_null(list_pop(head), type, member)
+
/* Does linear interpolation between powers of two */
static inline unsigned fract_exp_two(unsigned x, unsigned fract_bits)
{
@@ -378,11 +402,23 @@ do { \
_ret; \
})
-size_t bch2_rand_range(size_t);
+u64 bch2_get_random_u64_below(u64);
void memcpy_to_bio(struct bio *, struct bvec_iter, const void *);
void memcpy_from_bio(void *, struct bio *, struct bvec_iter);
+#ifdef CONFIG_BCACHEFS_DEBUG
+void bch2_corrupt_bio(struct bio *);
+
+static inline void bch2_maybe_corrupt_bio(struct bio *bio, unsigned ratio)
+{
+ if (ratio && !get_random_u32_below(ratio))
+ bch2_corrupt_bio(bio);
+}
+#else
+#define bch2_maybe_corrupt_bio(...) do {} while (0)
+#endif
+
static inline void memcpy_u64s_small(void *dst, const void *src,
unsigned u64s)
{
@@ -396,7 +432,7 @@ static inline void memcpy_u64s_small(void *dst, const void *src,
static inline void __memcpy_u64s(void *dst, const void *src,
unsigned u64s)
{
-#ifdef CONFIG_X86_64
+#if defined(CONFIG_X86_64) && !defined(CONFIG_KMSAN)
long d0, d1, d2;
asm volatile("rep ; movsq"
@@ -473,7 +509,7 @@ static inline void __memmove_u64s_up(void *_dst, const void *_src,
u64 *dst = (u64 *) _dst + u64s - 1;
u64 *src = (u64 *) _src + u64s - 1;
-#ifdef CONFIG_X86_64
+#if defined(CONFIG_X86_64) && !defined(CONFIG_KMSAN)
long d0, d1, d2;
asm volatile("std ;\n"
@@ -586,7 +622,7 @@ do { \
#define per_cpu_sum(_p) \
({ \
- typeof(*_p) _ret = 0; \
+ TYPEOF_UNQUAL(*_p) _ret = 0; \
\
int cpu; \
for_each_possible_cpu(cpu) \
@@ -647,8 +683,6 @@ static inline int cmp_le32(__le32 l, __le32 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);
@@ -696,4 +730,51 @@ static inline bool test_bit_le64(size_t bit, __le64 *addr)
return (addr[bit / 64] & cpu_to_le64(BIT_ULL(bit % 64))) != 0;
}
+static inline void memcpy_swab(void *_dst, void *_src, size_t len)
+{
+ u8 *dst = _dst + len;
+ u8 *src = _src;
+
+ while (len--)
+ *--dst = *src++;
+}
+
+#define set_flags(_map, _in, _out) \
+do { \
+ unsigned _i; \
+ \
+ for (_i = 0; _i < ARRAY_SIZE(_map); _i++) \
+ if ((_in) & (1 << _i)) \
+ (_out) |= _map[_i]; \
+ else \
+ (_out) &= ~_map[_i]; \
+} while (0)
+
+#define map_flags(_map, _in) \
+({ \
+ unsigned _out = 0; \
+ \
+ set_flags(_map, _in, _out); \
+ _out; \
+})
+
+#define map_flags_rev(_map, _in) \
+({ \
+ unsigned _i, _out = 0; \
+ \
+ for (_i = 0; _i < ARRAY_SIZE(_map); _i++) \
+ if ((_in) & _map[_i]) { \
+ (_out) |= 1 << _i; \
+ (_in) &= ~_map[_i]; \
+ } \
+ (_out); \
+})
+
+#define map_defined(_map) \
+({ \
+ unsigned _in = ~0; \
+ \
+ map_flags_rev(_map, _in); \
+})
+
#endif /* _BCACHEFS_UTIL_H */