+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-#include "bcachefs.h"
-#include "error.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();
- }
-}
-
-void 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);
-}
-
-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);
-}
projects / bcachefs-tools-debian / blobdiff