blob: 043431206799d80a6e3eab43bd635947fa48db9f [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0
#include "bcachefs.h"
#include "error.h"
#include "recovery.h"
#include "super.h"
#include "thread_with_file.h"
#define FSCK_ERR_RATELIMIT_NR 10
bool bch2_inconsistent_error(struct bch_fs *c)
{
set_bit(BCH_FS_error, &c->flags);
switch (c->opts.errors) {
case BCH_ON_ERROR_continue:
return false;
case BCH_ON_ERROR_ro:
if (bch2_fs_emergency_read_only(c))
bch_err(c, "inconsistency detected - emergency read only");
return true;
case BCH_ON_ERROR_panic:
panic(bch2_fmt(c, "panic after error"));
return true;
default:
BUG();
}
}
int bch2_topology_error(struct bch_fs *c)
{
set_bit(BCH_FS_topology_error, &c->flags);
if (!test_bit(BCH_FS_fsck_running, &c->flags)) {
bch2_inconsistent_error(c);
return -BCH_ERR_btree_need_topology_repair;
} else {
return bch2_run_explicit_recovery_pass(c, BCH_RECOVERY_PASS_check_topology) ?:
-BCH_ERR_btree_node_read_validate_error;
}
}
void bch2_fatal_error(struct bch_fs *c)
{
if (bch2_fs_emergency_read_only(c))
bch_err(c, "fatal error - emergency read only");
}
void bch2_io_error_work(struct work_struct *work)
{
struct bch_dev *ca = container_of(work, struct bch_dev, io_error_work);
struct bch_fs *c = ca->fs;
bool dev;
down_write(&c->state_lock);
dev = bch2_dev_state_allowed(c, ca, BCH_MEMBER_STATE_ro,
BCH_FORCE_IF_DEGRADED);
if (dev
? __bch2_dev_set_state(c, ca, BCH_MEMBER_STATE_ro,
BCH_FORCE_IF_DEGRADED)
: bch2_fs_emergency_read_only(c))
bch_err(ca,
"too many IO errors, setting %s RO",
dev ? "device" : "filesystem");
up_write(&c->state_lock);
}
void bch2_io_error(struct bch_dev *ca, enum bch_member_error_type type)
{
atomic64_inc(&ca->errors[type]);
//queue_work(system_long_wq, &ca->io_error_work);
}
enum ask_yn {
YN_NO,
YN_YES,
YN_ALLNO,
YN_ALLYES,
};
static enum ask_yn parse_yn_response(char *buf)
{
buf = strim(buf);
if (strlen(buf) == 1)
switch (buf[0]) {
case 'n':
return YN_NO;
case 'y':
return YN_YES;
case 'N':
return YN_ALLNO;
case 'Y':
return YN_ALLYES;
}
return -1;
}
#ifdef __KERNEL__
static enum ask_yn bch2_fsck_ask_yn(struct bch_fs *c)
{
struct stdio_redirect *stdio = c->stdio;
if (c->stdio_filter && c->stdio_filter != current)
stdio = NULL;
if (!stdio)
return YN_NO;
char buf[100];
int ret;
do {
bch2_print(c, " (y,n, or Y,N for all errors of this type) ");
int r = bch2_stdio_redirect_readline(stdio, buf, sizeof(buf) - 1);
if (r < 0)
return YN_NO;
buf[r] = '\0';
} while ((ret = parse_yn_response(buf)) < 0);
return ret;
}
#else
#include "tools-util.h"
static enum ask_yn bch2_fsck_ask_yn(struct bch_fs *c)
{
char *buf = NULL;
size_t buflen = 0;
int ret;
do {
fputs(" (y,n, or Y,N for all errors of this type) ", stdout);
fflush(stdout);
if (getline(&buf, &buflen, stdin) < 0)
die("error reading from standard input");
} while ((ret = parse_yn_response(buf)) < 0);
free(buf);
return ret;
}
#endif
static struct fsck_err_state *fsck_err_get(struct bch_fs *c, const char *fmt)
{
struct fsck_err_state *s;
if (!test_bit(BCH_FS_fsck_running, &c->flags))
return NULL;
list_for_each_entry(s, &c->fsck_error_msgs, list)
if (s->fmt == fmt) {
/*
* move it to the head of the list: repeated fsck errors
* are common
*/
list_move(&s->list, &c->fsck_error_msgs);
return s;
}
s = kzalloc(sizeof(*s), GFP_NOFS);
if (!s) {
if (!c->fsck_alloc_msgs_err)
bch_err(c, "kmalloc err, cannot ratelimit fsck errs");
c->fsck_alloc_msgs_err = true;
return NULL;
}
INIT_LIST_HEAD(&s->list);
s->fmt = fmt;
list_add(&s->list, &c->fsck_error_msgs);
return s;
}
int bch2_fsck_err(struct bch_fs *c,
enum bch_fsck_flags flags,
enum bch_sb_error_id err,
const char *fmt, ...)
{
struct fsck_err_state *s = NULL;
va_list args;
bool print = true, suppressing = false, inconsistent = false;
struct printbuf buf = PRINTBUF, *out = &buf;
int ret = -BCH_ERR_fsck_ignore;
if ((flags & FSCK_CAN_FIX) &&
test_bit(err, c->sb.errors_silent))
return -BCH_ERR_fsck_fix;
bch2_sb_error_count(c, err);
va_start(args, fmt);
prt_vprintf(out, fmt, args);
va_end(args);
mutex_lock(&c->fsck_error_msgs_lock);
s = fsck_err_get(c, fmt);
if (s) {
/*
* We may be called multiple times for the same error on
* transaction restart - this memoizes instead of asking the user
* multiple times for the same error:
*/
if (s->last_msg && !strcmp(buf.buf, s->last_msg)) {
ret = s->ret;
mutex_unlock(&c->fsck_error_msgs_lock);
printbuf_exit(&buf);
return ret;
}
kfree(s->last_msg);
s->last_msg = kstrdup(buf.buf, GFP_KERNEL);
if (c->opts.ratelimit_errors &&
!(flags & FSCK_NO_RATELIMIT) &&
s->nr >= FSCK_ERR_RATELIMIT_NR) {
if (s->nr == FSCK_ERR_RATELIMIT_NR)
suppressing = true;
else
print = false;
}
s->nr++;
}
#ifdef BCACHEFS_LOG_PREFIX
if (!strncmp(fmt, "bcachefs:", 9))
prt_printf(out, bch2_log_msg(c, ""));
#endif
if (!test_bit(BCH_FS_fsck_running, &c->flags)) {
if (c->opts.errors != BCH_ON_ERROR_continue ||
!(flags & (FSCK_CAN_FIX|FSCK_CAN_IGNORE))) {
prt_str(out, ", shutting down");
inconsistent = true;
ret = -BCH_ERR_fsck_errors_not_fixed;
} else if (flags & FSCK_CAN_FIX) {
prt_str(out, ", fixing");
ret = -BCH_ERR_fsck_fix;
} else {
prt_str(out, ", continuing");
ret = -BCH_ERR_fsck_ignore;
}
} else if (c->opts.fix_errors == FSCK_FIX_exit) {
prt_str(out, ", exiting");
ret = -BCH_ERR_fsck_errors_not_fixed;
} else if (flags & FSCK_CAN_FIX) {
int fix = s && s->fix
? s->fix
: c->opts.fix_errors;
if (fix == FSCK_FIX_ask) {
int ask;
prt_str(out, ": fix?");
if (bch2_fs_stdio_redirect(c))
bch2_print(c, "%s", out->buf);
else
bch2_print_string_as_lines(KERN_ERR, out->buf);
print = false;
ask = bch2_fsck_ask_yn(c);
if (ask >= YN_ALLNO && s)
s->fix = ask == YN_ALLNO
? FSCK_FIX_no
: FSCK_FIX_yes;
ret = ask & 1
? -BCH_ERR_fsck_fix
: -BCH_ERR_fsck_ignore;
} else if (fix == FSCK_FIX_yes ||
(c->opts.nochanges &&
!(flags & FSCK_CAN_IGNORE))) {
prt_str(out, ", fixing");
ret = -BCH_ERR_fsck_fix;
} else {
prt_str(out, ", not fixing");
}
} else if (flags & FSCK_NEED_FSCK) {
prt_str(out, " (run fsck to correct)");
} else {
prt_str(out, " (repair unimplemented)");
}
if (ret == -BCH_ERR_fsck_ignore &&
(c->opts.fix_errors == FSCK_FIX_exit ||
!(flags & FSCK_CAN_IGNORE)))
ret = -BCH_ERR_fsck_errors_not_fixed;
if (print) {
if (bch2_fs_stdio_redirect(c))
bch2_print(c, "%s\n", out->buf);
else
bch2_print_string_as_lines(KERN_ERR, out->buf);
}
if (test_bit(BCH_FS_fsck_running, &c->flags) &&
(ret != -BCH_ERR_fsck_fix &&
ret != -BCH_ERR_fsck_ignore))
bch_err(c, "Unable to continue, halting");
else if (suppressing)
bch_err(c, "Ratelimiting new instances of previous error");
if (s)
s->ret = ret;
mutex_unlock(&c->fsck_error_msgs_lock);
printbuf_exit(&buf);
if (inconsistent)
bch2_inconsistent_error(c);
if (ret == -BCH_ERR_fsck_fix) {
set_bit(BCH_FS_errors_fixed, &c->flags);
} else {
set_bit(BCH_FS_errors_not_fixed, &c->flags);
set_bit(BCH_FS_error, &c->flags);
}
return ret;
}
void bch2_flush_fsck_errs(struct bch_fs *c)
{
struct fsck_err_state *s, *n;
mutex_lock(&c->fsck_error_msgs_lock);
list_for_each_entry_safe(s, n, &c->fsck_error_msgs, list) {
if (s->ratelimited && s->last_msg)
bch_err(c, "Saw %llu errors like:\n %s", s->nr, s->last_msg);
list_del(&s->list);
kfree(s->last_msg);
kfree(s);
}
mutex_unlock(&c->fsck_error_msgs_lock);
}