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 bool 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                 return false;
  13         case BCH_ON_ERROR_RO:
  14                 if (bch2_fs_emergency_read_only(c))
  15                         bch_err(c, "emergency read only");
  16                 return true;
  17         case BCH_ON_ERROR_PANIC:
  18                 panic(bch2_fmt(c, "panic after error"));
  19                 return true;
  20         default:
  21                 BUG();
  22         }
  23 }
  24
  25 void bch2_fatal_error(struct bch_fs *c)
  26 {
  27         if (bch2_fs_emergency_read_only(c))
  28                 bch_err(c, "emergency read only");
  29 }
  30
  31 void bch2_io_error_work(struct work_struct *work)
  32 {
  33         struct bch_dev *ca = container_of(work, struct bch_dev, io_error_work);
  34         struct bch_fs *c = ca->fs;
  35         bool dev;
  36
  37         mutex_lock(&c->state_lock);
  38         dev = bch2_dev_state_allowed(c, ca, BCH_MEMBER_STATE_RO,
  39                                     BCH_FORCE_IF_DEGRADED);
  40         if (dev
  41             ? __bch2_dev_set_state(c, ca, BCH_MEMBER_STATE_RO,
  42                                   BCH_FORCE_IF_DEGRADED)
  43             : bch2_fs_emergency_read_only(c))
  44                 bch_err(ca,
  45                         "too many IO errors, setting %s RO",
  46                         dev ? "device" : "filesystem");
  47         mutex_unlock(&c->state_lock);
  48 }
  49
  50 void bch2_io_error(struct bch_dev *ca)
  51 {
  52         //queue_work(system_long_wq, &ca->io_error_work);
  53 }
  54
  55 #ifdef __KERNEL__
  56 #define ask_yn()        false
  57 #else
  58 #include "tools-util.h"
  59 #endif
  60
  61 enum fsck_err_ret bch2_fsck_err(struct bch_fs *c, unsigned flags,
  62                                 const char *fmt, ...)
  63 {
  64         struct fsck_err_state *s;
  65         va_list args;
  66         bool fix = false, print = true, suppressing = false;
  67         char _buf[sizeof(s->buf)], *buf = _buf;
  68
  69         if (test_bit(BCH_FS_FSCK_DONE, &c->flags)) {
  70                 va_start(args, fmt);
  71                 vprintk(fmt, args);
  72                 va_end(args);
  73
  74                 if (c->opts.errors == BCH_ON_ERROR_CONTINUE &&
  75                     flags & FSCK_CAN_FIX)
  76                         return FSCK_ERR_FIX;
  77
  78                 bch2_inconsistent_error(c);
  79                 return FSCK_ERR_EXIT;
  80         }
  81
  82         mutex_lock(&c->fsck_error_lock);
  83
  84         list_for_each_entry(s, &c->fsck_errors, list)
  85                 if (s->fmt == fmt)
  86                         goto found;
  87
  88         s = kzalloc(sizeof(*s), GFP_KERNEL);
  89         if (!s) {
  90                 if (!c->fsck_alloc_err)
  91                         bch_err(c, "kmalloc err, cannot ratelimit fsck errs");
  92                 c->fsck_alloc_err = true;
  93                 buf = _buf;
  94                 goto print;
  95         }
  96
  97         INIT_LIST_HEAD(&s->list);
  98         s->fmt = fmt;
  99 found:
 100         list_move(&s->list, &c->fsck_errors);
 101         s->nr++;
 102         suppressing     = s->nr == 10;
 103         print           = s->nr <= 10;
 104         buf             = s->buf;
 105 print:
 106         va_start(args, fmt);
 107         vscnprintf(buf, sizeof(_buf), fmt, args);
 108         va_end(args);
 109
 110         if (c->opts.fix_errors == FSCK_OPT_EXIT) {
 111                 bch_err(c, "%s, exiting", buf);
 112                 mutex_unlock(&c->fsck_error_lock);
 113                 return FSCK_ERR_EXIT;
 114         }
 115
 116         if (flags & FSCK_CAN_FIX) {
 117                 if (c->opts.fix_errors == FSCK_OPT_ASK) {
 118                         printk(KERN_ERR "%s: fix?", buf);
 119                         fix = ask_yn();
 120                 } else if (c->opts.fix_errors == FSCK_OPT_YES ||
 121                            (c->opts.nochanges &&
 122                             !(flags & FSCK_CAN_IGNORE))) {
 123                         if (print)
 124                                 bch_err(c, "%s, fixing", buf);
 125                         fix = true;
 126                 } else {
 127                         if (print)
 128                                 bch_err(c, "%s, not fixing", buf);
 129                         fix = false;
 130                 }
 131         } else if (flags & FSCK_NEED_FSCK) {
 132                 if (print)
 133                         bch_err(c, "%s (run fsck to correct)", buf);
 134         } else {
 135                 if (print)
 136                         bch_err(c, "%s (repair unimplemented)", buf);
 137         }
 138
 139         if (suppressing)
 140                 bch_err(c, "Ratelimiting new instances of previous error");
 141
 142         mutex_unlock(&c->fsck_error_lock);
 143
 144         set_bit(fix
 145                 ? BCH_FS_FSCK_FIXED_ERRORS
 146                 : BCH_FS_FSCK_UNFIXED_ERRORS, &c->flags);
 147
 148         return fix                              ? FSCK_ERR_FIX
 149                 : flags & FSCK_CAN_IGNORE       ? FSCK_ERR_IGNORE
 150                                                 : FSCK_ERR_EXIT;
 151 }
 152
 153 void bch2_flush_fsck_errs(struct bch_fs *c)
 154 {
 155         struct fsck_err_state *s, *n;
 156
 157         mutex_lock(&c->fsck_error_lock);
 158         set_bit(BCH_FS_FSCK_DONE, &c->flags);
 159
 160         list_for_each_entry_safe(s, n, &c->fsck_errors, list) {
 161                 if (s->nr > 10)
 162                         bch_err(c, "Saw %llu errors like:\n    %s", s->nr, s->buf);
 163
 164                 list_del(&s->list);
 165                 kfree(s);
 166         }
 167
 168         mutex_unlock(&c->fsck_error_lock);
 169 }