eb386617be
Add a tracepoint for downcasting private errors to standard errors, so they can be recovered even when not logged; also, add some documentation. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
72 lines
1.4 KiB
C
72 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
|
|
#include "bcachefs.h"
|
|
#include "errcode.h"
|
|
#include "trace.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 bch_err)
|
|
{
|
|
int std_err = -bch_err;
|
|
BUG_ON((unsigned) std_err >= BCH_ERR_MAX);
|
|
|
|
while (std_err >= BCH_ERR_START && bch2_errcode_parents[std_err - BCH_ERR_START])
|
|
std_err = bch2_errcode_parents[std_err - BCH_ERR_START];
|
|
|
|
trace_error_downcast(bch_err, std_err, _RET_IP_);
|
|
|
|
return -std_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);
|
|
}
|