From dcfe480544eef72d666cb1695624449e2c22da2d Mon Sep 17 00:00:00 2001 From: Markus Armbruster Date: Tue, 7 Jul 2020 18:06:01 +0200 Subject: 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 Reviewed-by: Eric Blake Message-Id: <20200707160613.848843-34-armbru@redhat.com> --- block/quorum.c | 16 +++++++--------- block/replication.c | 11 +++++------ block/throttle-groups.c | 22 +++++++++------------- block/vxhs.c | 9 ++++----- 4 files changed, 25 insertions(+), 33 deletions(-) (limited to 'block') diff --git a/block/quorum.c b/block/quorum.c index beb3b6dbcc..5d52e605db 100644 --- a/block/quorum.c +++ b/block/quorum.c @@ -910,13 +910,12 @@ static int quorum_open(BlockDriverState *bs, QDict *options, int flags, /* 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 @@ static int quorum_open(BlockDriverState *bs, QDict *options, int flags, 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 @@ static int quorum_open(BlockDriverState *bs, QDict *options, int flags, -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 @@ static int quorum_open(BlockDriverState *bs, QDict *options, int flags, 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 @@ static int quorum_open(BlockDriverState *bs, QDict *options, int flags, 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 @@ static int quorum_open(BlockDriverState *bs, QDict *options, int flags, &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 @@ close_exit: g_free(opened); exit: qemu_opts_del(opts); - /* propagate error */ - error_propagate(errp, local_err); return ret; } diff --git a/block/replication.c b/block/replication.c index 5701eeb9e8..b844a09eb1 100644 --- a/block/replication.c +++ b/block/replication.c @@ -105,7 +105,7 @@ static int replication_open(BlockDriverState *bs, QDict *options, mode = qemu_opt_get(opts, REPLICATION_MODE); if (!mode) { - error_setg(&local_err, "Missing the option mode"); + error_setg(errp, "Missing the option mode"); goto fail; } @@ -113,7 +113,8 @@ static int replication_open(BlockDriverState *bs, QDict *options, s->mode = REPLICATION_MODE_PRIMARY; top_id = qemu_opt_get(opts, REPLICATION_TOP_ID); if (top_id) { - error_setg(&local_err, "The primary side does not support option top-id"); + error_setg(errp, + "The primary side does not support option top-id"); goto fail; } } else if (!strcmp(mode, "secondary")) { @@ -121,11 +122,11 @@ static int replication_open(BlockDriverState *bs, QDict *options, top_id = qemu_opt_get(opts, REPLICATION_TOP_ID); s->top_id = g_strdup(top_id); if (!s->top_id) { - error_setg(&local_err, "Missing the option top-id"); + error_setg(errp, "Missing the option top-id"); goto fail; } } else { - error_setg(&local_err, + error_setg(errp, "The option mode's value should be primary or secondary"); goto fail; } @@ -136,8 +137,6 @@ static int replication_open(BlockDriverState *bs, QDict *options, fail: qemu_opts_del(opts); - error_propagate(errp, local_err); - return ret; } diff --git a/block/throttle-groups.c b/block/throttle-groups.c index e411051160..3d7e7cf990 100644 --- a/block/throttle-groups.c +++ b/block/throttle-groups.c @@ -819,16 +819,17 @@ static void throttle_group_set(Object *obj, Visitor *v, const char * name, * transaction, as certain combinations are invalid. */ if (tg->is_initialized) { - error_setg(&local_err, "Property cannot be set after initialization"); - goto ret; + error_setg(errp, "Property cannot be set after initialization"); + return; } if (!visit_type_int64(v, name, &value, &local_err)) { - goto ret; + error_propagate(errp, local_err); + return; } if (value < 0) { - error_setg(&local_err, "Property values cannot be negative"); - goto ret; + error_setg(errp, "Property values cannot be negative"); + return; } cfg = &tg->ts.cfg; @@ -841,9 +842,9 @@ static void throttle_group_set(Object *obj, Visitor *v, const char * name, break; case BURST_LENGTH: if (value > UINT_MAX) { - error_setg(&local_err, "%s value must be in the" - "range [0, %u]", info->name, UINT_MAX); - goto ret; + error_setg(errp, "%s value must be in the" "range [0, %u]", + info->name, UINT_MAX); + return; } cfg->buckets[info->type].burst_length = value; break; @@ -851,11 +852,6 @@ static void throttle_group_set(Object *obj, Visitor *v, const char * name, cfg->op_size = value; break; } - -ret: - error_propagate(errp, local_err); - return; - } static void throttle_group_get(Object *obj, Visitor *v, const char *name, diff --git a/block/vxhs.c b/block/vxhs.c index 237df4f185..fecaeb82c9 100644 --- a/block/vxhs.c +++ b/block/vxhs.c @@ -326,14 +326,14 @@ static int vxhs_open(BlockDriverState *bs, QDict *options, /* vdisk-id is the disk UUID */ vdisk_id_opt = qemu_opt_get(opts, VXHS_OPT_VDISK_ID); if (!vdisk_id_opt) { - error_setg(&local_err, QERR_MISSING_PARAMETER, VXHS_OPT_VDISK_ID); + error_setg(errp, QERR_MISSING_PARAMETER, VXHS_OPT_VDISK_ID); ret = -EINVAL; goto out; } /* vdisk-id may contain a leading '/' */ if (strlen(vdisk_id_opt) > UUID_FMT_LEN + 1) { - error_setg(&local_err, "vdisk-id cannot be more than %d characters", + error_setg(errp, "vdisk-id cannot be more than %d characters", UUID_FMT_LEN); ret = -EINVAL; goto out; @@ -352,14 +352,14 @@ static int vxhs_open(BlockDriverState *bs, QDict *options, server_host_opt = qemu_opt_get(tcp_opts, VXHS_OPT_HOST); if (!server_host_opt) { - error_setg(&local_err, QERR_MISSING_PARAMETER, + error_setg(errp, QERR_MISSING_PARAMETER, VXHS_OPT_SERVER"."VXHS_OPT_HOST); ret = -EINVAL; goto out; } if (strlen(server_host_opt) > MAXHOSTNAMELEN) { - error_setg(&local_err, "server.host cannot be more than %d characters", + error_setg(errp, "server.host cannot be more than %d characters", MAXHOSTNAMELEN); ret = -EINVAL; goto out; @@ -412,7 +412,6 @@ out: if (ret < 0) { vxhs_unref(); - error_propagate(errp, local_err); g_free(s->vdisk_hostinfo.host); g_free(s->vdisk_guid); g_free(s->tlscredsid); -- cgit v1.2.3