From owner-svn-src-all@freebsd.org Thu Jan 26 20:51:52 2017 Return-Path: Delivered-To: svn-src-all@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 1B479CC1357; Thu, 26 Jan 2017 20:51:52 +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 mx1.freebsd.org (Postfix) with ESMTPS id DC1561114; Thu, 26 Jan 2017 20:51:51 +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 v0QKpoMo099856; Thu, 26 Jan 2017 20:51:50 GMT (envelope-from mav@FreeBSD.org) Received: (from mav@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id v0QKpo6U099855; Thu, 26 Jan 2017 20:51:50 GMT (envelope-from mav@FreeBSD.org) Message-Id: <201701262051.v0QKpo6U099855@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: mav set sender to mav@FreeBSD.org using -f From: Alexander Motin Date: Thu, 26 Jan 2017 20:51:50 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r312837 - stable/10/sys/cam/ctl X-SVN-Group: stable-10 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: 2.1.23 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, 26 Jan 2017 20:51:52 -0000 Author: mav Date: Thu Jan 26 20:51:50 2017 New Revision: 312837 URL: https://svnweb.freebsd.org/changeset/base/312837 Log: MFC r311680: Make CTL_GETSTATS ioctl return partial data if buffer is small. Modified: stable/10/sys/cam/ctl/ctl.c Directory Properties: stable/10/ (props changed) Modified: stable/10/sys/cam/ctl/ctl.c ============================================================================== --- stable/10/sys/cam/ctl/ctl.c Thu Jan 26 20:51:18 2017 (r312836) +++ stable/10/sys/cam/ctl/ctl.c Thu Jan 26 20:51:50 2017 (r312837) @@ -2770,32 +2770,29 @@ ctl_ioctl(struct cdev *dev, u_long cmd, break; } case CTL_GETSTATS: { - struct ctl_stats *stats; + struct ctl_stats *stats = (struct ctl_stats *)addr; int i; - stats = (struct ctl_stats *)addr; - - if ((sizeof(struct ctl_lun_io_stats) * softc->num_luns) > - stats->alloc_len) { - stats->status = CTL_SS_NEED_MORE_SPACE; - stats->num_luns = softc->num_luns; - break; - } /* * XXX KDM no locking here. If the LUN list changes, * things can blow up. */ i = 0; + stats->status = CTL_SS_OK; + stats->fill_len = 0; STAILQ_FOREACH(lun, &softc->lun_list, links) { + if (stats->fill_len + sizeof(lun->stats) > + stats->alloc_len) { + stats->status = CTL_SS_NEED_MORE_SPACE; + break; + } retval = copyout(&lun->stats, &stats->lun_stats[i++], sizeof(lun->stats)); if (retval != 0) break; + stats->fill_len += sizeof(lun->stats); } stats->num_luns = softc->num_luns; - stats->fill_len = sizeof(struct ctl_lun_io_stats) * - softc->num_luns; - stats->status = CTL_SS_OK; #ifdef CTL_TIME_IO stats->flags = CTL_STATS_FLAG_TIME_VALID; #else