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615f867c14
Instead of overloading standard error codes (EINTR/EAGAIN), and defining short lists of error codes in multiple places that potentially end up overlapping & conflicting, we're now going to have one master list of error codes. Error codes are defined with an x-macro: thus we also have bch2_err_str() now. Also, error codes have a class field. Now, instead of checking for errors with ==, code should use bch2_err_matches(), which returns true if the error is equal to or a sub-error of the error class. This means we can define unique errors for every source location where an error is generated, which will help improve our error messages. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
51 lines
984 B
C
51 lines
984 B
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 <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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#define BCH_ERR_0 0
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static unsigned bch2_errcode_parents[] = {
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#define x(class, err) [BCH_ERR_##err - BCH_ERR_START] = BCH_ERR_##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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