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-rw-r--r--fs/bcachefs/errcode.c68
1 files changed, 68 insertions, 0 deletions
diff --git a/fs/bcachefs/errcode.c b/fs/bcachefs/errcode.c
new file mode 100644
index 0000000000..d260ff9bbf
--- /dev/null
+++ b/fs/bcachefs/errcode.c
@@ -0,0 +1,68 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include "bcachefs.h"
+#include "errcode.h"
+
+#include <linux/errname.h>
+
+static const char * const bch2_errcode_strs[] = {
+#define x(class, err) [BCH_ERR_##err - BCH_ERR_START] = #err,
+ BCH_ERRCODES()
+#undef x
+ NULL
+};
+
+static unsigned bch2_errcode_parents[] = {
+#define x(class, err) [BCH_ERR_##err - BCH_ERR_START] = class,
+ BCH_ERRCODES()
+#undef x
+};
+
+const char *bch2_err_str(int err)
+{
+ const char *errstr;
+
+ err = abs(err);
+
+ BUG_ON(err >= BCH_ERR_MAX);
+
+ if (err >= BCH_ERR_START)
+ errstr = bch2_errcode_strs[err - BCH_ERR_START];
+ else if (err)
+ errstr = errname(err);
+ else
+ errstr = "(No error)";
+ return errstr ?: "(Invalid error)";
+}
+
+bool __bch2_err_matches(int err, int class)
+{
+ err = abs(err);
+ class = abs(class);
+
+ BUG_ON(err >= BCH_ERR_MAX);
+ BUG_ON(class >= BCH_ERR_MAX);
+
+ while (err >= BCH_ERR_START && err != class)
+ err = bch2_errcode_parents[err - BCH_ERR_START];
+
+ return err == class;
+}
+
+int __bch2_err_class(int err)
+{
+ err = -err;
+ BUG_ON((unsigned) err >= BCH_ERR_MAX);
+
+ while (err >= BCH_ERR_START && bch2_errcode_parents[err - BCH_ERR_START])
+ err = bch2_errcode_parents[err - BCH_ERR_START];
+
+ return -err;
+}
+
+const char *bch2_blk_status_to_str(blk_status_t status)
+{
+ if (status == BLK_STS_REMOVED)
+ return "device removed";
+ return blk_status_to_str(status);
+}