From owner-svn-src-all@freebsd.org Thu Aug 8 02:08:10 2019 Return-Path: Delivered-To: svn-src-all@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 7E438C00CA; Thu, 8 Aug 2019 02:08:10 +0000 (UTC) (envelope-from mav@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 463sGf2kRzz4flK; Thu, 8 Aug 2019 02:08:10 +0000 (UTC) (envelope-from mav@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 3F6BB1DFEB; Thu, 8 Aug 2019 02:08:10 +0000 (UTC) (envelope-from mav@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id x7828Aai026121; Thu, 8 Aug 2019 02:08:10 GMT (envelope-from mav@FreeBSD.org) Received: (from mav@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id x7828Amx026120; Thu, 8 Aug 2019 02:08:10 GMT (envelope-from mav@FreeBSD.org) Message-Id: <201908080208.x7828Amx026120@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: mav set sender to mav@FreeBSD.org using -f From: Alexander Motin Date: Thu, 8 Aug 2019 02:08:10 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r350722 - stable/12/sys/cam X-SVN-Group: stable-12 X-SVN-Commit-Author: mav X-SVN-Commit-Paths: stable/12/sys/cam X-SVN-Commit-Revision: 350722 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 08 Aug 2019 02:08:10 -0000 Author: mav Date: Thu Aug 8 02:08:09 2019 New Revision: 350722 URL: https://svnweb.freebsd.org/changeset/base/350722 Log: MFC r349283 (by scottl): Refactor xpt_getattr() to make it more readable. No outwardly visible functional changes, though code flow was modified a bit internally to lessen the need for goto jumps and chained if conditionals. Modified: stable/12/sys/cam/cam_xpt.c Directory Properties: stable/12/ (props changed) Modified: stable/12/sys/cam/cam_xpt.c ============================================================================== --- stable/12/sys/cam/cam_xpt.c Thu Aug 8 02:07:05 2019 (r350721) +++ stable/12/sys/cam/cam_xpt.c Thu Aug 8 02:08:09 2019 (r350722) @@ -1253,6 +1253,7 @@ xpt_getattr(char *buf, size_t len, const char *attr, s { int ret = -1, l, o; struct ccb_dev_advinfo cdai; + struct scsi_vpd_device_id *did; struct scsi_vpd_id_descriptor *idd; xpt_path_assert(path, MA_OWNED); @@ -1285,31 +1286,36 @@ xpt_getattr(char *buf, size_t len, const char *attr, s cam_release_devq(cdai.ccb_h.path, 0, 0, 0, FALSE); if (cdai.provsiz == 0) goto out; - if (cdai.buftype == CDAI_TYPE_SCSI_DEVID) { + switch(cdai.buftype) { + case CDAI_TYPE_SCSI_DEVID: + did = (struct scsi_vpd_device_id *)cdai.buf; if (strcmp(attr, "GEOM::lunid") == 0) { - idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf, - cdai.provsiz, scsi_devid_is_lun_naa); + idd = scsi_get_devid(did, cdai.provsiz, + scsi_devid_is_lun_naa); if (idd == NULL) - idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf, - cdai.provsiz, scsi_devid_is_lun_eui64); + idd = scsi_get_devid(did, cdai.provsiz, + scsi_devid_is_lun_eui64); if (idd == NULL) - idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf, - cdai.provsiz, scsi_devid_is_lun_uuid); + idd = scsi_get_devid(did, cdai.provsiz, + scsi_devid_is_lun_uuid); if (idd == NULL) - idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf, - cdai.provsiz, scsi_devid_is_lun_md5); + idd = scsi_get_devid(did, cdai.provsiz, + scsi_devid_is_lun_md5); } else idd = NULL; + if (idd == NULL) - idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf, - cdai.provsiz, scsi_devid_is_lun_t10); + idd = scsi_get_devid(did, cdai.provsiz, + scsi_devid_is_lun_t10); if (idd == NULL) - idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf, - cdai.provsiz, scsi_devid_is_lun_name); + idd = scsi_get_devid(did, cdai.provsiz, + scsi_devid_is_lun_name); if (idd == NULL) - goto out; + break; + ret = 0; - if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == SVPD_ID_CODESET_ASCII) { + if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == + SVPD_ID_CODESET_ASCII) { if (idd->length < len) { for (l = 0; l < idd->length; l++) buf[l] = idd->identifier[l] ? @@ -1317,38 +1323,46 @@ xpt_getattr(char *buf, size_t len, const char *attr, s buf[l] = 0; } else ret = EFAULT; - } else if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == SVPD_ID_CODESET_UTF8) { + break; + } + if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == + SVPD_ID_CODESET_UTF8) { l = strnlen(idd->identifier, idd->length); if (l < len) { bcopy(idd->identifier, buf, l); buf[l] = 0; } else ret = EFAULT; - } else if ((idd->id_type & SVPD_ID_TYPE_MASK) == SVPD_ID_TYPE_UUID - && idd->identifier[0] == 0x10) { - if ((idd->length - 2) * 2 + 4 < len) { - for (l = 2, o = 0; l < idd->length; l++) { - if (l == 6 || l == 8 || l == 10 || l == 12) - o += sprintf(buf + o, "-"); - o += sprintf(buf + o, "%02x", - idd->identifier[l]); - } - } else + break; + } + if ((idd->id_type & SVPD_ID_TYPE_MASK) == + SVPD_ID_TYPE_UUID && idd->identifier[0] == 0x10) { + if ((idd->length - 2) * 2 + 4 >= len) { ret = EFAULT; - } else { - if (idd->length * 2 < len) { - for (l = 0; l < idd->length; l++) - sprintf(buf + l * 2, "%02x", - idd->identifier[l]); - } else - ret = EFAULT; + break; + } + for (l = 2, o = 0; l < idd->length; l++) { + if (l == 6 || l == 8 || l == 10 || l == 12) + o += sprintf(buf + o, "-"); + o += sprintf(buf + o, "%02x", + idd->identifier[l]); + } + break; } - } else { + if (idd->length * 2 < len) { + for (l = 0; l < idd->length; l++) + sprintf(buf + l * 2, "%02x", + idd->identifier[l]); + } else + ret = EFAULT; + break; + default: if (cdai.provsiz < len) { cdai.buf[cdai.provsiz] = 0; ret = 0; } else ret = EFAULT; + break; } out: