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100 lines
2.4 KiB
C
100 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include "bcachefs.h"
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#include "super-io.h"
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#include "sb-counters.h"
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/* BCH_SB_FIELD_counters */
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static const char * const bch2_counter_names[] = {
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#define x(t, n, ...) (#t),
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BCH_PERSISTENT_COUNTERS()
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#undef x
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NULL
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};
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static size_t bch2_sb_counter_nr_entries(struct bch_sb_field_counters *ctrs)
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{
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if (!ctrs)
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return 0;
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return (__le64 *) vstruct_end(&ctrs->field) - &ctrs->d[0];
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};
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static int bch2_sb_counters_validate(struct bch_sb *sb, struct bch_sb_field *f,
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enum bch_validate_flags flags, struct printbuf *err)
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{
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return 0;
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};
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static void bch2_sb_counters_to_text(struct printbuf *out, struct bch_sb *sb,
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struct bch_sb_field *f)
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{
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struct bch_sb_field_counters *ctrs = field_to_type(f, counters);
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unsigned int nr = bch2_sb_counter_nr_entries(ctrs);
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for (unsigned i = 0; i < nr; i++)
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prt_printf(out, "%s \t%llu\n",
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i < BCH_COUNTER_NR ? bch2_counter_names[i] : "(unknown)",
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le64_to_cpu(ctrs->d[i]));
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};
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int bch2_sb_counters_to_cpu(struct bch_fs *c)
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{
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struct bch_sb_field_counters *ctrs = bch2_sb_field_get(c->disk_sb.sb, counters);
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unsigned int i;
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unsigned int nr = bch2_sb_counter_nr_entries(ctrs);
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u64 val = 0;
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for (i = 0; i < BCH_COUNTER_NR; i++)
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c->counters_on_mount[i] = 0;
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for (i = 0; i < min_t(unsigned int, nr, BCH_COUNTER_NR); i++) {
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val = le64_to_cpu(ctrs->d[i]);
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percpu_u64_set(&c->counters[i], val);
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c->counters_on_mount[i] = val;
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}
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return 0;
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};
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int bch2_sb_counters_from_cpu(struct bch_fs *c)
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{
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struct bch_sb_field_counters *ctrs = bch2_sb_field_get(c->disk_sb.sb, counters);
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struct bch_sb_field_counters *ret;
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unsigned int i;
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unsigned int nr = bch2_sb_counter_nr_entries(ctrs);
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if (nr < BCH_COUNTER_NR) {
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ret = bch2_sb_field_resize(&c->disk_sb, counters,
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sizeof(*ctrs) / sizeof(u64) + BCH_COUNTER_NR);
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if (ret) {
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ctrs = ret;
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nr = bch2_sb_counter_nr_entries(ctrs);
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}
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}
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for (i = 0; i < min_t(unsigned int, nr, BCH_COUNTER_NR); i++)
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ctrs->d[i] = cpu_to_le64(percpu_u64_get(&c->counters[i]));
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return 0;
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}
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void bch2_fs_counters_exit(struct bch_fs *c)
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{
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free_percpu(c->counters);
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}
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int bch2_fs_counters_init(struct bch_fs *c)
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{
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c->counters = __alloc_percpu(sizeof(u64) * BCH_COUNTER_NR, sizeof(u64));
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if (!c->counters)
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return -BCH_ERR_ENOMEM_fs_counters_init;
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return bch2_sb_counters_to_cpu(c);
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}
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const struct bch_sb_field_ops bch_sb_field_ops_counters = {
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.validate = bch2_sb_counters_validate,
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.to_text = bch2_sb_counters_to_text,
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};
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