From: Mike Christie <michael.christie@oracle.com> To: bvanassche@acm.org, linux-block@vger.kernel.org, dm-devel@redhat.com, snitzer@kernel.org, axboe@kernel.dk, hch@lst.de, linux-nvme@lists.infradead.org, martin.petersen@oracle.com, linux-scsi@vger.kernel.org, james.bottomley@hansenpartnership.com Subject: [PATCH 0/20] Use block pr_ops in LIO Date: Mon, 8 Aug 2022 19:03:59 -0500 [thread overview] Message-ID: <20220809000419.10674-1-michael.christie@oracle.com> (raw) The following patches were built over Linus's tree and this patchset which fixes some scsi error handling issues: https://lore.kernel.org/linux-scsi/1136e369-49b0-c3ef-340a-ab337f514fc5@oracle.com/T/#meebd5040bc360f8c86532b792b48dbe3efe88619 The patches allow us to use the block pr_ops with LIO's target_core_iblock module to support cluster applications in VMs. Currently, to use windows clustering or linux clustering (pacemaker + cluster labs scsi fence agents) in VMs with LIO and vhost-scsi, you have to use tcmu or pscsi or use a cluster aware FS/framework for the LIO pr file. Setting up a cluster FS/framework is pain and waste when your real backend device is already a distributed device, and pscsi and tcmu are nice for specific use cases, but iblock gives you the best performance and allows you to use stacked devices like dm-multipath. So these patches allow iblock to work like pscsi/tcmu where they can pass a PR command to the backend module. And then iblock will use the pr_ops to pass the PR command to the real devices similar to what we do for unmap today. The patches are separated in the following groups: patches 1 - 11 - Add callouts to read a reservation and it's keys. patches 12 - 16 - Have pr_ops return a blk_status_t. patches 17 - 20 - Support for target_core_iblock to bypass the emulate PR code and call the pr_ops. This patchset has been tested with the libiscsi PGR ops and with window's failover cluster verification test. v2: - Drop BLK_STS_NEXUS rename changes. Will do separately. - Add NVMe support. - Fixed bug in target_core_iblock where a variable was not initialized mentioned by Christoph. - Fixed sd pr_ops UA handling issue found when running libiscsi PGR tests. - Added patches to allow pr_ops to pass up a BLK_STS so we could return a RESERVATION_CONFLICT status when a pr_ops callout fails.
WARNING: multiple messages have this Message-ID (diff)
From: Mike Christie <michael.christie@oracle.com> To: bvanassche@acm.org, linux-block@vger.kernel.org, dm-devel@redhat.com, snitzer@kernel.org, axboe@kernel.dk, hch@lst.de, linux-nvme@lists.infradead.org, martin.petersen@oracle.com, linux-scsi@vger.kernel.org, james.bottomley@hansenpartnership.com Subject: [dm-devel] [PATCH 0/20] Use block pr_ops in LIO Date: Mon, 8 Aug 2022 19:03:59 -0500 [thread overview] Message-ID: <20220809000419.10674-1-michael.christie@oracle.com> (raw) The following patches were built over Linus's tree and this patchset which fixes some scsi error handling issues: https://lore.kernel.org/linux-scsi/1136e369-49b0-c3ef-340a-ab337f514fc5@oracle.com/T/#meebd5040bc360f8c86532b792b48dbe3efe88619 The patches allow us to use the block pr_ops with LIO's target_core_iblock module to support cluster applications in VMs. Currently, to use windows clustering or linux clustering (pacemaker + cluster labs scsi fence agents) in VMs with LIO and vhost-scsi, you have to use tcmu or pscsi or use a cluster aware FS/framework for the LIO pr file. Setting up a cluster FS/framework is pain and waste when your real backend device is already a distributed device, and pscsi and tcmu are nice for specific use cases, but iblock gives you the best performance and allows you to use stacked devices like dm-multipath. So these patches allow iblock to work like pscsi/tcmu where they can pass a PR command to the backend module. And then iblock will use the pr_ops to pass the PR command to the real devices similar to what we do for unmap today. The patches are separated in the following groups: patches 1 - 11 - Add callouts to read a reservation and it's keys. patches 12 - 16 - Have pr_ops return a blk_status_t. patches 17 - 20 - Support for target_core_iblock to bypass the emulate PR code and call the pr_ops. This patchset has been tested with the libiscsi PGR ops and with window's failover cluster verification test. v2: - Drop BLK_STS_NEXUS rename changes. Will do separately. - Add NVMe support. - Fixed bug in target_core_iblock where a variable was not initialized mentioned by Christoph. - Fixed sd pr_ops UA handling issue found when running libiscsi PGR tests. - Added patches to allow pr_ops to pass up a BLK_STS so we could return a RESERVATION_CONFLICT status when a pr_ops callout fails. -- dm-devel mailing list dm-devel@redhat.com https://listman.redhat.com/mailman/listinfo/dm-devel
next reply other threads:[~2022-08-09 0:04 UTC|newest] Thread overview: 94+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-08-09 0:03 Mike Christie [this message] 2022-08-09 0:03 ` [dm-devel] [PATCH 0/20] Use block pr_ops in LIO Mike Christie 2022-08-09 0:04 ` [PATCH v2 01/20] block: Add PR callouts for read keys and reservation Mike Christie 2022-08-09 0:04 ` [dm-devel] " Mike Christie 2022-08-09 0:04 ` [PATCH v2 02/20] scsi: Rename sd_pr_command Mike Christie 2022-08-09 0:04 ` [dm-devel] " Mike Christie 2022-08-09 19:22 ` Bart Van Assche 2022-08-09 19:22 ` [dm-devel] " Bart Van Assche 2022-08-09 0:04 ` [PATCH v2 03/20] scsi: Move sd_pr_type to header to share Mike Christie 2022-08-09 0:04 ` [dm-devel] " Mike Christie 2022-08-09 0:04 ` [PATCH v2 04/20] scsi: Add support for block PR read keys/reservation Mike Christie 2022-08-09 0:04 ` [dm-devel] " Mike Christie 2022-08-09 19:26 ` Bart Van Assche 2022-08-09 19:26 ` [dm-devel] " Bart Van Assche 2022-08-10 3:28 ` Mike Christie 2022-08-10 3:28 ` [dm-devel] " Mike Christie 2022-08-09 0:04 ` [PATCH v2 05/20] dm: " Mike Christie 2022-08-09 0:04 ` [dm-devel] " Mike Christie 2022-08-09 0:04 ` [PATCH v2 06/20] nvme: Fix reservation status related structs Mike Christie 2022-08-09 0:04 ` [dm-devel] " Mike Christie 2022-08-09 7:19 ` Christoph Hellwig 2022-08-09 7:19 ` [dm-devel] " Christoph Hellwig 2022-08-09 11:09 ` Chaitanya Kulkarni 2022-08-09 11:09 ` [dm-devel] " Chaitanya Kulkarni 2022-08-09 0:04 ` [PATCH v2 07/20] nvme: Don't hardcode the data len for pr commands Mike Christie 2022-08-09 0:04 ` [dm-devel] " Mike Christie 2022-08-09 7:19 ` Christoph Hellwig 2022-08-09 7:19 ` [dm-devel] " Christoph Hellwig 2022-08-09 0:04 ` [PATCH v2 08/20] nvme: Add helper to convert to a pr_ops PR type Mike Christie 2022-08-09 0:04 ` [dm-devel] " Mike Christie 2022-08-09 7:20 ` Christoph Hellwig 2022-08-09 7:20 ` [dm-devel] " Christoph Hellwig 2022-08-09 11:12 ` Chaitanya Kulkarni 2022-08-09 11:12 ` [dm-devel] " Chaitanya Kulkarni 2022-08-09 0:04 ` [PATCH v2 09/20] nvme: Add helper to execute Reservation Report Mike Christie 2022-08-09 0:04 ` [dm-devel] " Mike Christie 2022-08-09 10:55 ` Chaitanya Kulkarni 2022-08-09 10:55 ` [dm-devel] " Chaitanya Kulkarni 2022-08-09 16:18 ` Mike Christie 2022-08-09 16:18 ` [dm-devel] " Mike Christie 2022-08-09 10:56 ` Chaitanya Kulkarni 2022-08-09 10:56 ` [dm-devel] " Chaitanya Kulkarni 2022-08-09 14:51 ` Keith Busch 2022-08-09 14:51 ` [dm-devel] " Keith Busch 2022-08-09 16:21 ` Mike Christie 2022-08-09 16:21 ` [dm-devel] " Mike Christie 2022-08-10 1:45 ` Chaitanya Kulkarni 2022-08-10 1:45 ` [dm-devel] " Chaitanya Kulkarni 2022-08-10 3:17 ` Keith Busch 2022-08-10 3:17 ` [dm-devel] " Keith Busch 2022-08-10 4:54 ` Chaitanya Kulkarni 2022-08-10 4:54 ` [dm-devel] " Chaitanya Kulkarni 2022-08-09 0:04 ` [PATCH v2 10/20] nvme: Add pr_ops read_keys support Mike Christie 2022-08-09 0:04 ` [dm-devel] " Mike Christie 2022-08-09 0:04 ` [PATCH v2 11/20] nvme: Add pr_ops read_reservation support Mike Christie 2022-08-09 0:04 ` [dm-devel] " Mike Christie 2022-08-09 0:04 ` [PATCH v2 12/20] block,nvme,scsi,dm: Add blk_status to pr_ops callouts Mike Christie 2022-08-09 0:04 ` [dm-devel] [PATCH v2 12/20] block, nvme, scsi, dm: " Mike Christie 2022-08-09 7:21 ` [PATCH v2 12/20] block,nvme,scsi,dm: " Christoph Hellwig 2022-08-09 7:21 ` [dm-devel] [PATCH v2 12/20] block, nvme, scsi, dm: " Christoph Hellwig 2022-08-09 18:08 ` [PATCH v2 12/20] block,nvme,scsi,dm: " Mike Christie 2022-08-09 18:08 ` [dm-devel] [PATCH v2 12/20] block, nvme, scsi, dm: " Mike Christie 2022-08-09 19:33 ` [PATCH v2 12/20] block,nvme,scsi,dm: " Bart Van Assche 2022-08-09 19:33 ` [dm-devel] [PATCH v2 12/20] block, nvme, scsi, dm: " Bart Van Assche 2022-08-10 3:34 ` [PATCH v2 12/20] block,nvme,scsi,dm: " Mike Christie 2022-08-10 3:34 ` [dm-devel] [PATCH v2 12/20] block, nvme, scsi, dm: " Mike Christie 2022-08-09 0:04 ` [PATCH v2 13/20] nvme: Have nvme pr_ops return a blk_status_t Mike Christie 2022-08-09 0:04 ` [dm-devel] " Mike Christie 2022-08-09 10:58 ` Chaitanya Kulkarni 2022-08-09 10:58 ` [dm-devel] " Chaitanya Kulkarni 2022-08-09 0:04 ` [PATCH v2 14/20] scsi: Retry pr_ops commands if a UA is returned Mike Christie 2022-08-09 0:04 ` [dm-devel] " Mike Christie 2022-08-09 7:16 ` Christoph Hellwig 2022-08-09 7:16 ` [dm-devel] " Christoph Hellwig 2022-08-09 16:24 ` Mike Christie 2022-08-09 16:24 ` [dm-devel] " Mike Christie 2022-08-09 19:31 ` Bart Van Assche 2022-08-09 19:31 ` [dm-devel] " Bart Van Assche 2022-08-09 0:04 ` [PATCH v2 15/20] scsi: Export scsi_result_to_blk_status Mike Christie 2022-08-09 0:04 ` [dm-devel] " Mike Christie 2022-08-09 0:04 ` [PATCH v2 16/20] scsi: Have sd pr_ops return a blk_status_t Mike Christie 2022-08-09 0:04 ` [dm-devel] " Mike Christie 2022-08-09 7:18 ` Christoph Hellwig 2022-08-09 7:18 ` [dm-devel] " Christoph Hellwig 2022-08-09 16:22 ` Mike Christie 2022-08-09 16:22 ` [dm-devel] " Mike Christie 2022-08-09 0:04 ` [PATCH v2 17/20] scsi: target: Rename sbc_ops to exec_cmd_ops Mike Christie 2022-08-09 0:04 ` [dm-devel] " Mike Christie 2022-08-09 0:04 ` [dm-devel] [PATCH v2 18/20] scsi: target: Allow backends to hook into PR handling Mike Christie 2022-08-09 0:04 ` Mike Christie 2022-08-09 0:04 ` [dm-devel] [PATCH v2 19/20] scsi: target: Don't support SCSI-2 RESERVE/RELEASE Mike Christie 2022-08-09 0:04 ` Mike Christie 2022-08-09 0:04 ` [PATCH v2 20/20] scsi: target: Add block PR support to iblock Mike Christie 2022-08-09 0:04 ` [dm-devel] " Mike Christie
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