From patchwork Tue Nov 26 18:42:16 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Benjamin Marzinski X-Patchwork-Id: 13886309 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 53A451DF74F for ; Tue, 26 Nov 2024 18:42:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732646557; cv=none; b=G0WRxKvyMkQpxI3ROldzzSCKfKw4mYGU1Da0MqK4OoC+VXJSDSb9RJHbWCc6xZYS1Opyma2w4wy0iZacPGn8x77ZWo3Dmaa03dIXrn1Y1ugxleTp0SHm4ymtNyMoc7H3xqzH3gJmoE02uS5FfGemKSsmFKin+SO5QADI/fHuSIs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732646557; c=relaxed/simple; bh=8CqEHJZ8IkdD1jm+3b3+QvLYYU3GJD/yeMPjL/hYofU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:content-type; b=U2zodNUafOzXW3NbXyw780uEiAJfJCiB3rhoR36TlwtUgJiedS0iWqQW73w5gxJ0GjDlFl4OIhGWYKMVNE8IKb/h7klRrFx0pdGpvNTD3P2zxqn6t/vVwhxKoKDlZOJfJuGv1xNJiKeOsSdRV6EChROea8zH6JzuAo2caMPqm24= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=ZGPqIrIL; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="ZGPqIrIL" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1732646553; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=8ODbx21KGX5odUdOUaLqgD30E01W2HFjjeLx8ADhCgs=; b=ZGPqIrIL45yJU3pg8i+kBkZx8hJKVM+S9Qa9nfzDboMMDVL/Jl62BXnGpriUMVHngOm7l0 GG29eH25Nsz+spk6Qoo4wV4kvsxnaIe6rfHUwo9rMI4mc9OvdF+ShtJzk4Qi+MhcOMk9rE rFU0R5QsM0enbp2vxPV60VpSbum42ik= Received: from mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-140-gzfiGTDTOUuMUprpPRPDUw-1; Tue, 26 Nov 2024 13:42:29 -0500 X-MC-Unique: gzfiGTDTOUuMUprpPRPDUw-1 X-Mimecast-MFC-AGG-ID: gzfiGTDTOUuMUprpPRPDUw Received: from mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.40]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 4207B1955E94; Tue, 26 Nov 2024 18:42:27 +0000 (UTC) Received: from bmarzins-01.fast.eng.rdu2.dc.redhat.com (bmarzins-01.fast.eng.rdu2.dc.redhat.com [10.6.23.12]) by mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id E89061956054; Tue, 26 Nov 2024 18:42:26 +0000 (UTC) Received: from bmarzins-01.fast.eng.rdu2.dc.redhat.com (localhost [127.0.0.1]) by bmarzins-01.fast.eng.rdu2.dc.redhat.com (8.17.2/8.17.1) with ESMTPS id 4AQIgPDg855496 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NOT); Tue, 26 Nov 2024 13:42:25 -0500 Received: (from bmarzins@localhost) by bmarzins-01.fast.eng.rdu2.dc.redhat.com (8.17.2/8.17.2/Submit) id 4AQIgPeB855495; Tue, 26 Nov 2024 13:42:25 -0500 From: Benjamin Marzinski To: Christophe Varoqui Cc: device-mapper development , Martin Wilck , Martin Wilck Subject: [PATCH v3 04/12] libmultipath: set uuid, name, and dmi if a device is found Date: Tue, 26 Nov 2024 13:42:16 -0500 Message-ID: <20241126184224.855459-5-bmarzins@redhat.com> In-Reply-To: <20241126184224.855459-1-bmarzins@redhat.com> References: <20241126184224.855459-1-bmarzins@redhat.com> Precedence: bulk X-Mailing-List: dm-devel@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.40 X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: mVKbasyHqne8ZEMPVFG0bH8u-zJaAJEuUIW8L3QbCPA_1732646547 X-Mimecast-Originator: redhat.com content-type: text/plain; charset="US-ASCII"; x-default=true Instead of only setting the uuid, name, and dmi on DMP_OK, return them whenever we find a device, even if that device doesn't match. To make the code simpler, we set these values before checks that could possibly return DMP_ERR. The only caller of libmp_mapinfo() that could update a multipath value incorrectly because of this is update_multipath_table(). Fix that. Signed-off-by: Benjamin Marzinski Reviewed-by: Martin Wilck --- libmultipath/devmapper.c | 47 +++++++++++++++++++------------------- libmultipath/devmapper.h | 5 +++- libmultipath/structs_vec.c | 5 +++- tests/mapinfo.c | 45 +++++++++++++++++++++++++----------- 4 files changed, 63 insertions(+), 39 deletions(-) diff --git a/libmultipath/devmapper.c b/libmultipath/devmapper.c index 42176667..38c49bd5 100644 --- a/libmultipath/devmapper.c +++ b/libmultipath/devmapper.c @@ -736,6 +736,29 @@ static int libmp_mapinfo__(int flags, mapid_t id, mapinfo_t info, const char *ma && !(uuid = dm_task_get_uuid(dmt)))) return DMP_ERR; + if (info.name) { + strlcpy(info.name, name, WWID_SIZE); + condlog(4, "%s: %s: name: \"%s\"", fname__, map_id, info.name); + } + if (info.uuid) { + strlcpy(info.uuid, uuid, DM_UUID_LEN); + condlog(4, "%s: %s: uuid: \"%s\"", fname__, map_id, info.uuid); + } + + if (info.dmi) { + memcpy(info.dmi, &dmi, sizeof(*info.dmi)); + condlog(4, "%s: %s %d:%d, %d targets, %s table, %s, %s, %d opened, %u events", + fname__, map_id, + info.dmi->major, info.dmi->minor, + info.dmi->target_count, + info.dmi->live_table ? "live" : + info.dmi->inactive_table ? "inactive" : "no", + info.dmi->suspended ? "suspended" : "active", + info.dmi->read_only ? "ro" : "rw", + info.dmi->open_count, + info.dmi->event_nr); + } + if (flags & MAPINFO_CHECK_UUID && ((flags & MAPINFO_PART_ONLY && !is_mpath_part_uuid(uuid, NULL)) || (!(flags & MAPINFO_PART_ONLY) && !is_mpath_uuid(uuid)))) { @@ -768,40 +791,16 @@ static int libmp_mapinfo__(int flags, mapid_t id, mapinfo_t info, const char *ma /* * Check possible error conditions. - * If error is returned, don't touch any output parameters. */ if ((info.status && !(tmp_status = strdup(params))) || (info.target && !tmp_target && !(tmp_target = strdup(params)))) return DMP_ERR; - if (info.name) { - strlcpy(info.name, name, WWID_SIZE); - condlog(4, "%s: %s: name: \"%s\"", fname__, map_id, info.name); - } - if (info.uuid) { - strlcpy(info.uuid, uuid, DM_UUID_LEN); - condlog(4, "%s: %s: uuid: \"%s\"", fname__, map_id, info.uuid); - } - if (info.size) { *info.size = length; condlog(4, "%s: %s: size: %lld", fname__, map_id, *info.size); } - if (info.dmi) { - memcpy(info.dmi, &dmi, sizeof(*info.dmi)); - condlog(4, "%s: %s %d:%d, %d targets, %s table, %s, %s, %d opened, %u events", - fname__, map_id, - info.dmi->major, info.dmi->minor, - info.dmi->target_count, - info.dmi->live_table ? "live" : - info.dmi->inactive_table ? "inactive" : "no", - info.dmi->suspended ? "suspended" : "active", - info.dmi->read_only ? "ro" : "rw", - info.dmi->open_count, - info.dmi->event_nr); - } - if (info.target) { *info.target = steal_ptr(tmp_target); if (!tgt_set) diff --git a/libmultipath/devmapper.h b/libmultipath/devmapper.h index 0bd2b907..4aeefad1 100644 --- a/libmultipath/devmapper.h +++ b/libmultipath/devmapper.h @@ -115,7 +115,10 @@ typedef struct libmp_map_info { * * This function obtains the requested information for the device-mapper map * identified by the input parameters. - * Output parameters are only filled in if the return value is DMP_OK. + * If non-NULL, the name, uuid, and dmi output paramters may be filled in for + * any return value besides DMP_NOT_FOUND and will always be filled in for + * return values other than DMP_NOT_FOUND and DMP_ERR. + * The other parameters are only filled in if the return value is DMP_OK. * For target / status / size information, the map's table should contain * only one target (usually multipath or linear). */ diff --git a/libmultipath/structs_vec.c b/libmultipath/structs_vec.c index 5df495b3..d22056ca 100644 --- a/libmultipath/structs_vec.c +++ b/libmultipath/structs_vec.c @@ -504,6 +504,8 @@ update_multipath_table (struct multipath *mpp, vector pathvec, int flags) int r = DMP_ERR; char __attribute__((cleanup(cleanup_charp))) *params = NULL; char __attribute__((cleanup(cleanup_charp))) *status = NULL; + /* only set the actual mpp->dmi if libmp_mapinfo returns DMP_OK */ + struct dm_info dmi; unsigned long long size; struct config *conf; @@ -522,7 +524,7 @@ update_multipath_table (struct multipath *mpp, vector pathvec, int flags) .target = ¶ms, .status = &status, .size = &mpp->size, - .dmi = &mpp->dmi, + .dmi = &dmi, }); if (r != DMP_OK) { @@ -531,6 +533,7 @@ update_multipath_table (struct multipath *mpp, vector pathvec, int flags) } else if (size != mpp->size) condlog(0, "%s: size changed from %llu to %llu", mpp->alias, size, mpp->size); + mpp->dmi = dmi; return update_multipath_table__(mpp, pathvec, flags, params, status); } diff --git a/tests/mapinfo.c b/tests/mapinfo.c index ee487989..36511607 100644 --- a/tests/mapinfo.c +++ b/tests/mapinfo.c @@ -451,15 +451,21 @@ static void test_mapinfo_bad_check_uuid_00(void **state) static void test_mapinfo_bad_check_uuid_01(void **state) { int rc; + struct dm_info dmi = { .suspended = 0 }; + char name[WWID_SIZE] = { 0 }; + char uuid[DM_UUID_LEN] = { 0 }; mock_mapinfo_name_1(DM_DEVICE_INFO, 1, "foo", 1, 1, 0); WRAP_DM_TASK_GET_INFO(1); WRAP_DM_TASK_GET_INFO(&MPATH_DMI_01); + will_return(__wrap_dm_task_get_name, MPATH_NAME_01); will_return(__wrap_dm_task_get_uuid, BAD_UUID_01); rc = libmp_mapinfo(DM_MAP_BY_NAME | MAPINFO_CHECK_UUID, (mapid_t) { .str = "foo", }, - (mapinfo_t) { .name = NULL }); + (mapinfo_t) { .dmi = &dmi, .name = name, .uuid = uuid }); assert_int_equal(rc, DMP_NO_MATCH); + assert_true(!strcmp(name, MPATH_NAME_01)); + assert_true(!strcmp(uuid, BAD_UUID_01)); } static void test_mapinfo_bad_check_uuid_02(void **state) @@ -887,17 +893,26 @@ static void test_mapinfo_bad_next_target_01(void **state) static void test_mapinfo_bad_next_target_02(void **state) { int rc; - unsigned long long size; + struct dm_info dmi = { .suspended = 0 }; + char name[WWID_SIZE] = { 0 }; + char uuid[DM_UUID_LEN] = { 0 }; + unsigned long long size = 0; mock_mapinfo_name_1(DM_DEVICE_STATUS, 1, "foo", 1, 1, 0); WRAP_DM_TASK_GET_INFO(1); WRAP_DM_TASK_GET_INFO(&MPATH_DMI_02); + will_return(__wrap_dm_task_get_name, MPATH_NAME_01); + will_return(__wrap_dm_task_get_uuid, MPATH_UUID_01); /* no targets */ mock_dm_get_next_target(0, NULL, NULL, NULL); rc = libmp_mapinfo(DM_MAP_BY_NAME, (mapid_t) { .str = "foo", }, - (mapinfo_t) { .size = &size }); + (mapinfo_t) { .dmi = &dmi, .name = name, .uuid = uuid, .size = &size }); assert_int_equal(rc, DMP_EMPTY); + assert_int_equal(size, 0); + assert_memory_equal(&dmi, &MPATH_DMI_02, sizeof(dmi)); + assert_true(!strcmp(name, MPATH_NAME_01)); + assert_true(!strcmp(uuid, MPATH_UUID_01)); } /* libmp_mapinfo needs to do a DM_DEVICE_STATUS ioctl */ @@ -946,10 +961,10 @@ static void test_mapinfo_bad_target_type_03(void **state) (mapid_t) { .str = "foo", }, (mapinfo_t) { .dmi = &dmi, .name = name, .uuid = uuid }); assert_int_equal(rc, DMP_NO_MATCH); - /* make sure memory content is not changed */ - assert_memory_equal(&dmi, &((struct dm_info) { .exists = 0 }), sizeof(dmi)); - assert_memory_equal(&name, &((char[WWID_SIZE]) { 0 }), WWID_SIZE); - assert_memory_equal(&uuid, &((char[DM_UUID_LEN]) { 0 }), DM_UUID_LEN); + /* make sure that the ouput was filled in */ + assert_memory_equal(&dmi, &MPATH_DMI_01, sizeof(dmi)); + assert_true(!strcmp(name, MPATH_NAME_01)); + assert_true(!strcmp(uuid, MPATH_UUID_01)); } static void test_mapinfo_bad_target_type_04(void **state) @@ -1065,23 +1080,32 @@ static void test_mapinfo_no_table_01(void **state) (mapid_t) { .str = "foo", }, (mapinfo_t) { .dmi = &dmi }); assert_int_equal(rc, DMP_EMPTY); + assert_memory_equal(&dmi, &MPATH_DMI_02, sizeof(dmi)); } static void test_mapinfo_no_table_02(void **state) { int rc; struct dm_info dmi = { .suspended = 0 }; + char name[WWID_SIZE] = { 0 }; + char uuid[DM_UUID_LEN] = { 0 }; + unsigned long long size = 0; mock_mapinfo_name_1(DM_DEVICE_STATUS, 1, "foo", 1, 1, 0); WRAP_DM_TASK_GET_INFO(1); /* DMI with no live table, MAPINFO_CHECK_UUID set */ WRAP_DM_TASK_GET_INFO(&MPATH_DMI_02); + will_return(__wrap_dm_task_get_name, MPATH_NAME_01); mock_dm_get_next_target(0, NULL, NULL, NULL); will_return(__wrap_dm_task_get_uuid, MPATH_UUID_01); rc = libmp_mapinfo(DM_MAP_BY_NAME | MAPINFO_CHECK_UUID | MAPINFO_MPATH_ONLY, (mapid_t) { .str = "foo", }, - (mapinfo_t) { .dmi = &dmi }); + (mapinfo_t) { .dmi = &dmi, .name = name, .uuid = uuid, .size = &size }); assert_int_equal(rc, DMP_EMPTY); + assert_int_equal(size, 0); + assert_memory_equal(&dmi, &MPATH_DMI_02, sizeof(dmi)); + assert_true(!strcmp(name, MPATH_NAME_01)); + assert_true(!strcmp(uuid, MPATH_UUID_01)); } static void test_mapinfo_good_status_01(void **state) @@ -1121,8 +1145,6 @@ static void test_mapinfo_bad_strdup_01(void **state) (mapinfo_t) { .status = &status, .uuid = uuid, .name = name }); assert_int_equal(rc, DMP_ERR); assert_null(status); - assert_memory_equal(&name, &((char[WWID_SIZE]) { 0 }), WWID_SIZE); - assert_memory_equal(&uuid, &((char[DM_UUID_LEN]) { 0 }), DM_UUID_LEN); } @@ -1284,9 +1306,6 @@ static void test_mapinfo_bad_strdup_02(void **state) assert_int_equal(rc, DMP_ERR); assert_null(status); assert_null(target); - assert_memory_equal(&dmi, &((struct dm_info) { .suspended = 0 }), sizeof(dmi)); - assert_memory_equal(&name, &((char[WWID_SIZE]) { 0 }), WWID_SIZE); - assert_memory_equal(&uuid, &((char[DM_UUID_LEN]) { 0 }), DM_UUID_LEN); } static void test_mapinfo_bad_strdup_03(void **state)