1 // SPDX-License-Identifier: GPL-2.0
2 #include "bcachefs.h"
3 #include "super-io.h"
4 #include "sb-counters.h"
5
6 /* BCH_SB_FIELD_counters */
7
8 static const char * const bch2_counter_names[] = {
9 #define x(t, n, ...) (#t),
10 BCH_PERSISTENT_COUNTERS()
11 #undef x
12 NULL
13 };
14
bch2_sb_counter_nr_entries(struct bch_sb_field_counters * ctrs)15 static size_t bch2_sb_counter_nr_entries(struct bch_sb_field_counters *ctrs)
16 {
17 if (!ctrs)
18 return 0;
19
20 return (__le64 *) vstruct_end(&ctrs->field) - &ctrs->d[0];
21 };
22
bch2_sb_counters_validate(struct bch_sb * sb,struct bch_sb_field * f,enum bch_validate_flags flags,struct printbuf * err)23 static int bch2_sb_counters_validate(struct bch_sb *sb, struct bch_sb_field *f,
24 enum bch_validate_flags flags, struct printbuf *err)
25 {
26 return 0;
27 };
28
bch2_sb_counters_to_text(struct printbuf * out,struct bch_sb * sb,struct bch_sb_field * f)29 static void bch2_sb_counters_to_text(struct printbuf *out, struct bch_sb *sb,
30 struct bch_sb_field *f)
31 {
32 struct bch_sb_field_counters *ctrs = field_to_type(f, counters);
33 unsigned int nr = bch2_sb_counter_nr_entries(ctrs);
34
35 for (unsigned i = 0; i < nr; i++)
36 prt_printf(out, "%s \t%llu\n",
37 i < BCH_COUNTER_NR ? bch2_counter_names[i] : "(unknown)",
38 le64_to_cpu(ctrs->d[i]));
39 };
40
bch2_sb_counters_to_cpu(struct bch_fs * c)41 int bch2_sb_counters_to_cpu(struct bch_fs *c)
42 {
43 struct bch_sb_field_counters *ctrs = bch2_sb_field_get(c->disk_sb.sb, counters);
44 unsigned int i;
45 unsigned int nr = bch2_sb_counter_nr_entries(ctrs);
46 u64 val = 0;
47
48 for (i = 0; i < BCH_COUNTER_NR; i++)
49 c->counters_on_mount[i] = 0;
50
51 for (i = 0; i < min_t(unsigned int, nr, BCH_COUNTER_NR); i++) {
52 val = le64_to_cpu(ctrs->d[i]);
53 percpu_u64_set(&c->counters[i], val);
54 c->counters_on_mount[i] = val;
55 }
56 return 0;
57 };
58
bch2_sb_counters_from_cpu(struct bch_fs * c)59 int bch2_sb_counters_from_cpu(struct bch_fs *c)
60 {
61 struct bch_sb_field_counters *ctrs = bch2_sb_field_get(c->disk_sb.sb, counters);
62 struct bch_sb_field_counters *ret;
63 unsigned int i;
64 unsigned int nr = bch2_sb_counter_nr_entries(ctrs);
65
66 if (nr < BCH_COUNTER_NR) {
67 ret = bch2_sb_field_resize(&c->disk_sb, counters,
68 sizeof(*ctrs) / sizeof(u64) + BCH_COUNTER_NR);
69
70 if (ret) {
71 ctrs = ret;
72 nr = bch2_sb_counter_nr_entries(ctrs);
73 }
74 }
75
76
77 for (i = 0; i < min_t(unsigned int, nr, BCH_COUNTER_NR); i++)
78 ctrs->d[i] = cpu_to_le64(percpu_u64_get(&c->counters[i]));
79 return 0;
80 }
81
bch2_fs_counters_exit(struct bch_fs * c)82 void bch2_fs_counters_exit(struct bch_fs *c)
83 {
84 free_percpu(c->counters);
85 }
86
bch2_fs_counters_init(struct bch_fs * c)87 int bch2_fs_counters_init(struct bch_fs *c)
88 {
89 c->counters = __alloc_percpu(sizeof(u64) * BCH_COUNTER_NR, sizeof(u64));
90 if (!c->counters)
91 return -BCH_ERR_ENOMEM_fs_counters_init;
92
93 return bch2_sb_counters_to_cpu(c);
94 }
95
96 const struct bch_sb_field_ops bch_sb_field_ops_counters = {
97 .validate = bch2_sb_counters_validate,
98 .to_text = bch2_sb_counters_to_text,
99 };
100