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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>
71 lines
1.4 KiB
C
71 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include "bcachefs.h"
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#include "errcode.h"
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#include "trace.h"
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#include <linux/errname.h>
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static const char * const bch2_errcode_strs[] = {
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#define x(class, err) [BCH_ERR_##err - BCH_ERR_START] = #err,
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BCH_ERRCODES()
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#undef x
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NULL
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};
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static unsigned bch2_errcode_parents[] = {
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#define x(class, err) [BCH_ERR_##err - BCH_ERR_START] = class,
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BCH_ERRCODES()
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#undef x
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};
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const char *bch2_err_str(int err)
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{
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const char *errstr;
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err = abs(err);
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BUG_ON(err >= BCH_ERR_MAX);
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if (err >= BCH_ERR_START)
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errstr = bch2_errcode_strs[err - BCH_ERR_START];
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else if (err)
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errstr = errname(err);
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else
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errstr = "(No error)";
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return errstr ?: "(Invalid error)";
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}
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bool __bch2_err_matches(int err, int class)
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{
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err = abs(err);
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class = abs(class);
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BUG_ON(err >= BCH_ERR_MAX);
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BUG_ON(class >= BCH_ERR_MAX);
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while (err >= BCH_ERR_START && err != class)
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err = bch2_errcode_parents[err - BCH_ERR_START];
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return err == class;
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}
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int __bch2_err_class(int bch_err)
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{
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int std_err = -bch_err;
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BUG_ON((unsigned) std_err >= BCH_ERR_MAX);
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while (std_err >= BCH_ERR_START && bch2_errcode_parents[std_err - BCH_ERR_START])
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std_err = bch2_errcode_parents[std_err - BCH_ERR_START];
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trace_error_downcast(bch_err, std_err, _RET_IP_);
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return -std_err;
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}
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const char *bch2_blk_status_to_str(blk_status_t status)
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{
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if (status == BLK_STS_REMOVED)
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return "device removed";
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return blk_status_to_str(status);
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}
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