From owner-svn-src-head@FreeBSD.ORG Wed Oct 29 03:14:31 2014 Return-Path: Delivered-To: svn-src-head@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 722E8CB2; Wed, 29 Oct 2014 03:14:31 +0000 (UTC) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:1900:2254:2068::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 5E67E1C2; Wed, 29 Oct 2014 03:14:31 +0000 (UTC) Received: from svn.freebsd.org ([127.0.1.70]) by svn.freebsd.org (8.14.9/8.14.9) with ESMTP id s9T3EVE8050786; Wed, 29 Oct 2014 03:14:31 GMT (envelope-from mav@FreeBSD.org) Received: (from mav@localhost) by svn.freebsd.org (8.14.9/8.14.9/Submit) id s9T3EUFT050781; Wed, 29 Oct 2014 03:14:30 GMT (envelope-from mav@FreeBSD.org) Message-Id: <201410290314.s9T3EUFT050781@svn.freebsd.org> X-Authentication-Warning: svn.freebsd.org: mav set sender to mav@FreeBSD.org using -f From: Alexander Motin Date: Wed, 29 Oct 2014 03:14:30 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r273809 - in head/sys/cam: ctl scsi X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 29 Oct 2014 03:14:31 -0000 Author: mav Date: Wed Oct 29 03:14:29 2014 New Revision: 273809 URL: https://svnweb.freebsd.org/changeset/base/273809 Log: Implement better handling for ENOSPC error for both CTL and CAM. This makes VMWare VAAI Thin Provisioning Stun primitive activate, pausing the virtual machine, when backing storage (ZFS pool) is getting overflowed. MFC after: 1 week Sponsored by: iXsystems, Inc. Modified: head/sys/cam/ctl/ctl_backend_block.c head/sys/cam/ctl/ctl_error.c head/sys/cam/ctl/ctl_error.h head/sys/cam/scsi/scsi_all.c Modified: head/sys/cam/ctl/ctl_backend_block.c ============================================================================== --- head/sys/cam/ctl/ctl_backend_block.c Wed Oct 29 02:23:50 2014 (r273808) +++ head/sys/cam/ctl/ctl_backend_block.c Wed Oct 29 03:14:29 2014 (r273809) @@ -501,6 +501,8 @@ ctl_be_block_biodone(struct bio *bio) if (beio->num_errors > 0) { if (error == EOPNOTSUPP) { ctl_set_invalid_opcode(&io->scsiio); + } else if (error == ENOSPC) { + ctl_set_space_alloc_fail(&io->scsiio); } else if (beio->bio_cmd == BIO_FLUSH) { /* XXX KDM is there is a better error here? */ ctl_set_internal_failure(&io->scsiio, @@ -711,14 +713,12 @@ ctl_be_block_dispatch_file(struct ctl_be char path_str[32]; ctl_scsi_path_string(io, path_str, sizeof(path_str)); - /* - * XXX KDM ZFS returns ENOSPC when the underlying - * filesystem fills up. What kind of SCSI error should we - * return for that? - */ printf("%s%s command returned errno %d\n", path_str, (beio->bio_cmd == BIO_READ) ? "READ" : "WRITE", error); - ctl_set_medium_error(&io->scsiio); + if (error == ENOSPC) { + ctl_set_space_alloc_fail(&io->scsiio); + } else + ctl_set_medium_error(&io->scsiio); ctl_complete_beio(beio); return; } @@ -804,7 +804,10 @@ ctl_be_block_dispatch_zvol(struct ctl_be * return the I/O to the user. */ if (error != 0) { - ctl_set_medium_error(&io->scsiio); + if (error == ENOSPC) { + ctl_set_space_alloc_fail(&io->scsiio); + } else + ctl_set_medium_error(&io->scsiio); ctl_complete_beio(beio); return; } Modified: head/sys/cam/ctl/ctl_error.c ============================================================================== --- head/sys/cam/ctl/ctl_error.c Wed Oct 29 02:23:50 2014 (r273808) +++ head/sys/cam/ctl/ctl_error.c Wed Oct 29 03:14:29 2014 (r273809) @@ -806,6 +806,18 @@ ctl_set_task_aborted(struct ctl_scsiio * } void +ctl_set_space_alloc_fail(struct ctl_scsiio *ctsio) +{ + /* "Space allocation failed write protect" */ + ctl_set_sense(ctsio, + /*current_error*/ 1, + /*sense_key*/ SSD_KEY_DATA_PROTECT, + /*asc*/ 0x27, + /*ascq*/ 0x07, + SSD_ELEM_NONE); +} + +void ctl_set_success(struct ctl_scsiio *ctsio) { struct scsi_sense_data *sense; Modified: head/sys/cam/ctl/ctl_error.h ============================================================================== --- head/sys/cam/ctl/ctl_error.h Wed Oct 29 02:23:50 2014 (r273808) +++ head/sys/cam/ctl/ctl_error.h Wed Oct 29 03:14:29 2014 (r273809) @@ -81,6 +81,7 @@ void ctl_set_reservation_conflict(struct void ctl_set_queue_full(struct ctl_scsiio *ctsio); void ctl_set_busy(struct ctl_scsiio *ctsio); void ctl_set_task_aborted(struct ctl_scsiio *ctsio); +void ctl_set_space_alloc_fail(struct ctl_scsiio *ctsio); void ctl_set_success(struct ctl_scsiio *ctsio); #endif /* _CTL_ERROR_H_ */ Modified: head/sys/cam/scsi/scsi_all.c ============================================================================== --- head/sys/cam/scsi/scsi_all.c Wed Oct 29 02:23:50 2014 (r273808) +++ head/sys/cam/scsi/scsi_all.c Wed Oct 29 03:14:29 2014 (r273809) @@ -1733,7 +1733,7 @@ static struct asc_table_entry asc_table[ { SST(0x27, 0x06, SS_RDEF, /* XXX TBD */ "Conditional write protect") }, /* D B */ - { SST(0x27, 0x07, SS_RDEF, /* XXX TBD */ + { SST(0x27, 0x07, SS_FATAL | ENOSPC, "Space allocation failed write protect") }, /* DTLPWROMAEBKVF */ { SST(0x28, 0x00, SS_FATAL | ENXIO,