100 lines · c
1// SPDX-License-Identifier: GPL-2.02#include "bcachefs.h"3#include "super-io.h"4#include "sb-counters.h"5 6/* BCH_SB_FIELD_counters */7 8static const char * const bch2_counter_names[] = {9#define x(t, n, ...) (#t),10 BCH_PERSISTENT_COUNTERS()11#undef x12 NULL13};14 15static 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 23static 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 29static 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 41int 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 59int 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 82void bch2_fs_counters_exit(struct bch_fs *c)83{84 free_percpu(c->counters);85}86 87int 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 96const 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