git.sesse.net Git - bcachefs-tools-debian/blob - libbcachefs/error.c

   1 #include "bcachefs.h"
   2 #include "error.h"
   3 #include "io.h"
   4 #include "super.h"
   5
   6 void bch2_inconsistent_error(struct bch_fs *c)
   7 {
   8         set_bit(BCH_FS_ERROR, &c->flags);
   9
  10         switch (c->opts.errors) {
  11         case BCH_ON_ERROR_CONTINUE:
  12                 break;
  13         case BCH_ON_ERROR_RO:
  14                 if (bch2_fs_emergency_read_only(c))
  15                         bch_err(c, "emergency read only");
  16                 break;
  17         case BCH_ON_ERROR_PANIC:
  18                 panic(bch2_fmt(c, "panic after error"));
  19                 break;
  20         }
  21 }
  22
  23 void bch2_fatal_error(struct bch_fs *c)
  24 {
  25         if (bch2_fs_emergency_read_only(c))
  26                 bch_err(c, "emergency read only");
  27 }
  28
  29 void bch2_nonfatal_io_error_work(struct work_struct *work)
  30 {
  31         struct bch_dev *ca = container_of(work, struct bch_dev, io_error_work);
  32         struct bch_fs *c = ca->fs;
  33         bool dev;
  34
  35         mutex_lock(&c->state_lock);
  36         dev = bch2_dev_state_allowed(c, ca, BCH_MEMBER_STATE_RO,
  37                                     BCH_FORCE_IF_DEGRADED);
  38         if (dev
  39             ? __bch2_dev_set_state(c, ca, BCH_MEMBER_STATE_RO,
  40                                   BCH_FORCE_IF_DEGRADED)
  41             : bch2_fs_emergency_read_only(c))
  42                 bch_err(ca,
  43                         "too many IO errors, setting %s RO",
  44                         dev ? "device" : "filesystem");
  45         mutex_unlock(&c->state_lock);
  46 }
  47
  48 void bch2_nonfatal_io_error(struct bch_dev *ca)
  49 {
  50         queue_work(system_long_wq, &ca->io_error_work);
  51 }
  52
  53 #ifdef __KERNEL__
  54 #define ask_yn()        false
  55 #else
  56 #include "tools-util.h"
  57 #endif
  58
  59 enum fsck_err_ret bch2_fsck_err(struct bch_fs *c, unsigned flags,
  60                                 const char *fmt, ...)
  61 {
  62         struct fsck_err_state *s;
  63         va_list args;
  64         bool fix = false, print = true, suppressing = false;
  65         char _buf[sizeof(s->buf)], *buf = _buf;
  66
  67         mutex_lock(&c->fsck_error_lock);
  68
  69         if (test_bit(BCH_FS_FSCK_DONE, &c->flags))
  70                 goto print;
  71
  72         list_for_each_entry(s, &c->fsck_errors, list)
  73                 if (s->fmt == fmt)
  74                         goto found;
  75
  76         s = kzalloc(sizeof(*s), GFP_KERNEL);
  77         if (!s) {
  78                 if (!c->fsck_alloc_err)
  79                         bch_err(c, "kmalloc err, cannot ratelimit fsck errs");
  80                 c->fsck_alloc_err = true;
  81                 buf = _buf;
  82                 goto print;
  83         }
  84
  85         INIT_LIST_HEAD(&s->list);
  86         s->fmt = fmt;
  87 found:
  88         list_move(&s->list, &c->fsck_errors);
  89         s->nr++;
  90         suppressing     = s->nr == 10;
  91         print           = s->nr <= 10;
  92         buf             = s->buf;
  93 print:
  94         va_start(args, fmt);
  95         vscnprintf(buf, sizeof(_buf), fmt, args);
  96         va_end(args);
  97
  98         if (flags & FSCK_CAN_FIX) {
  99                 if (c->opts.fix_errors == FSCK_ERR_ASK) {
 100                         printk(KERN_ERR "%s: fix?", buf);
 101                         fix = ask_yn();
 102                 } else if (c->opts.fix_errors == FSCK_ERR_YES ||
 103                            (c->opts.nochanges &&
 104                             !(flags & FSCK_CAN_IGNORE))) {
 105                         if (print)
 106                                 bch_err(c, "%s, fixing", buf);
 107                         fix = true;
 108                 } else {
 109                         if (print)
 110                                 bch_err(c, "%s, not fixing", buf);
 111                         fix = false;
 112                 }
 113         } else if (flags & FSCK_NEED_FSCK) {
 114                 if (print)
 115                         bch_err(c, "%s (run fsck to correct)", buf);
 116         } else {
 117                 if (print)
 118                         bch_err(c, "%s (repair unimplemented)", buf);
 119         }
 120
 121         if (suppressing)
 122                 bch_err(c, "Ratelimiting new instances of previous error");
 123
 124         mutex_unlock(&c->fsck_error_lock);
 125
 126         if (fix)
 127                 set_bit(BCH_FS_FSCK_FIXED_ERRORS, &c->flags);
 128
 129         return fix                              ? FSCK_ERR_FIX
 130                 : flags & FSCK_CAN_IGNORE       ? FSCK_ERR_IGNORE
 131                                                 : FSCK_ERR_EXIT;
 132 }
 133
 134 void bch2_flush_fsck_errs(struct bch_fs *c)
 135 {
 136         struct fsck_err_state *s, *n;
 137
 138         mutex_lock(&c->fsck_error_lock);
 139         set_bit(BCH_FS_FSCK_DONE, &c->flags);
 140
 141         list_for_each_entry_safe(s, n, &c->fsck_errors, list) {
 142                 if (s->nr > 10)
 143                         bch_err(c, "Saw %llu errors like:\n    %s", s->nr, s->buf);
 144
 145                 list_del(&s->list);
 146                 kfree(s);
 147         }
 148
 149         mutex_unlock(&c->fsck_error_lock);
 150 }