error: Avoid unnecessary error_propagate() after error_setg()
Replace
error_setg(&err, ...);
error_propagate(errp, err);
by
error_setg(errp, ...);
Related pattern:
if (...) {
error_setg(&err, ...);
goto out;
}
...
out:
error_propagate(errp, err);
return;
When all paths to label out are that way, replace by
if (...) {
error_setg(errp, ...);
return;
}
and delete the label along with the error_propagate().
When we have at most one other path that actually needs to propagate,
and maybe one at the end that where propagation is unnecessary, e.g.
foo(..., &err);
if (err) {
goto out;
}
...
bar(..., &err);
out:
error_propagate(errp, err);
return;
move the error_propagate() to where it's needed, like
if (...) {
foo(..., &err);
error_propagate(errp, err);
return;
}
...
bar(..., errp);
return;
and transform the error_setg() as above.
In some places, the transformation results in obviously unnecessary
error_propagate(). The next few commits will eliminate them.
Bonus: the elimination of gotos will make later patches in this series
easier to review.
Candidates for conversion tracked down with this Coccinelle script:
@@
identifier err, errp;
expression list args;
@@
- error_setg(&err, args);
+ error_setg(errp, args);
... when != err
error_propagate(errp, err);
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20200707160613.848843-34-armbru@redhat.com>
diff --git a/block/quorum.c b/block/quorum.c
index beb3b6d..5d52e60 100644
--- a/block/quorum.c
+++ b/block/quorum.c
@@ -910,13 +910,12 @@
/* count how many different children are present */
s->num_children = qdict_array_entries(options, "children.");
if (s->num_children < 0) {
- error_setg(&local_err, "Option children is not a valid array");
+ error_setg(errp, "Option children is not a valid array");
ret = -EINVAL;
goto exit;
}
if (s->num_children < 1) {
- error_setg(&local_err,
- "Number of provided children must be 1 or more");
+ error_setg(errp, "Number of provided children must be 1 or more");
ret = -EINVAL;
goto exit;
}
@@ -929,7 +928,7 @@
s->threshold = qemu_opt_get_number(opts, QUORUM_OPT_VOTE_THRESHOLD, 0);
/* and validate it against s->num_children */
- ret = quorum_valid_threshold(s->threshold, s->num_children, &local_err);
+ ret = quorum_valid_threshold(s->threshold, s->num_children, errp);
if (ret < 0) {
goto exit;
}
@@ -942,7 +941,7 @@
-EINVAL, NULL);
}
if (ret < 0) {
- error_setg(&local_err, "Please set read-pattern as fifo or quorum");
+ error_setg(errp, "Please set read-pattern as fifo or quorum");
goto exit;
}
s->read_pattern = ret;
@@ -950,7 +949,7 @@
if (s->read_pattern == QUORUM_READ_PATTERN_QUORUM) {
s->is_blkverify = qemu_opt_get_bool(opts, QUORUM_OPT_BLKVERIFY, false);
if (s->is_blkverify && (s->num_children != 2 || s->threshold != 2)) {
- error_setg(&local_err, "blkverify=on can only be set if there are "
+ error_setg(errp, "blkverify=on can only be set if there are "
"exactly two files and vote-threshold is 2");
ret = -EINVAL;
goto exit;
@@ -959,7 +958,7 @@
s->rewrite_corrupted = qemu_opt_get_bool(opts, QUORUM_OPT_REWRITE,
false);
if (s->rewrite_corrupted && s->is_blkverify) {
- error_setg(&local_err,
+ error_setg(errp,
"rewrite-corrupted=on cannot be used with blkverify=on");
ret = -EINVAL;
goto exit;
@@ -979,6 +978,7 @@
&child_of_bds, BDRV_CHILD_DATA, false,
&local_err);
if (local_err) {
+ error_propagate(errp, local_err);
ret = -EINVAL;
goto close_exit;
}
@@ -1004,8 +1004,6 @@
g_free(opened);
exit:
qemu_opts_del(opts);
- /* propagate error */
- error_propagate(errp, local_err);
return ret;
}
