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error: Use error_prepend() where it makes obvious sense

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Done with this Coccinelle semantic patch

    @@
    expression FMT, E1, E2;
    expression list ARGS;
    @@
    -    error_setg(E1, FMT, ARGS, error_get_pretty(E2));
    +    error_propagate(E1, E2);/*###*/
    +    error_prepend(E1, FMT/*@@@*/, ARGS);

followed by manual cleanup, first because I can't figure out how to
make Coccinelle transform strings, and second to get rid of now
superfluous error_propagate().

We now use or propagate the original error whole instead of just its
message obtained with error_get_pretty().  This avoids suppressing its
hint (see commit 50b7b00), but I can't see how the errors touched in
this commit could come with hints.  It also improves the message
printed with &error_abort when we screw up (see commit 1e9b65b).

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Markus Armbruster 2015-12-18 16:35:15 +01:00
parent c29b77f955
commit e43bfd9c87
6 changed files with 19 additions and 30 deletions
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19
block.c
View file

@ -1349,12 +1349,10 @@ int bdrv_open_backing_file(BlockDriverState *bs, QDict *parent_options,
ret = bdrv_open_inherit(&backing_hd,
*backing_filename ? backing_filename : NULL,
reference, options, 0, bs, &child_backing,
&local_err);
errp);
if (ret < 0) {
bs->open_flags |= BDRV_O_NO_BACKING;
error_setg(errp, "Could not open backing file: %s",
error_get_pretty(local_err));
error_free(local_err);
error_prepend(errp, "Could not open backing file: ");
goto free_exit;
}
@ -1460,12 +1458,11 @@ int bdrv_append_temp_snapshot(BlockDriverState *bs, int flags, Error **errp)
opts = qemu_opts_create(bdrv_qcow2.create_opts, NULL, 0,
&error_abort);
qemu_opt_set_number(opts, BLOCK_OPT_SIZE, total_size, &error_abort);
ret = bdrv_create(&bdrv_qcow2, tmp_filename, opts, &local_err);
ret = bdrv_create(&bdrv_qcow2, tmp_filename, opts, errp);
qemu_opts_del(opts);
if (ret < 0) {
error_setg(errp, "Could not create temporary overlay '%s': %s",
tmp_filename, error_get_pretty(local_err));
error_free(local_err);
error_prepend(errp, "Could not create temporary overlay '%s': ",
tmp_filename);
goto out;
}
@ -3729,9 +3726,9 @@ bool bdrv_op_is_blocked(BlockDriverState *bs, BlockOpType op, Error **errp)
if (!QLIST_EMPTY(&bs->op_blockers[op])) {
blocker = QLIST_FIRST(&bs->op_blockers[op]);
if (errp) {
error_setg(errp, "Node '%s' is busy: %s",
bdrv_get_device_or_node_name(bs),
error_get_pretty(blocker->reason));
*errp = error_copy(blocker->reason);
error_prepend(errp, "Node '%s' is busy: ",
bdrv_get_device_or_node_name(bs));
}
return true;
}