user/sven/linux.git/drivers/scsi/device_handler, branch v4.19.114

scsi: scsi_dh_alua: handle RTPG sense code correctly during state transitions

2019-11-10T10:27:20Z

[ Upstream commit b6ce6fb121a655aefe41dccc077141c102145a37 ] Some arrays are not capable of returning RTPG data during state transitioning, but rather return an 'LUN not accessible, asymmetric access state transition' sense code. In these cases we can set the state to 'transitioning' directly and don't need to evaluate the RTPG data (which we won't have anyway). Link: https://lore.kernel.org/r/20191007135701.32389-1-hare@suse.de Reviewed-by: Laurence Oberman Reviewed-by: Ewan D. Milne Reviewed-by: Bart Van Assche Signed-off-by: Hannes Reinecke Signed-off-by: Martin K. Petersen Signed-off-by: Sasha Levin

scsi: scsi_dh_rdac: zero cdb in send_mode_select()

2019-10-05T11:10:00Z

commit 57adf5d4cfd3198aa480e7c94a101fc8c4e6109d upstream. cdb in send_mode_select() is not zeroed and is only partially filled in rdac_failover_get(), which leads to some random data getting to the device. Users have reported storage responding to such commands with INVALID FIELD IN CDB. Code before commit 327825574132 was not affected, as it called blk_rq_set_block_pc(). Fix this by zeroing out the cdb first. Identified & fix proposed by HPE. Fixes: 327825574132 ("scsi_dh_rdac: switch to scsi_execute_req_flags()") Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20190904155205.1666-1-martin.wilck@suse.com Signed-off-by: Martin Wilck Acked-by: Ales Novak Reviewed-by: Shane Seymour Signed-off-by: Martin K. Petersen Signed-off-by: Greg Kroah-Hartman

scsi: scsi_dh_alua: always use a 2 second delay before retrying RTPG

2019-08-16T08:12:49Z

[ Upstream commit 20122994e38aef0ae50555884d287adde6641c94 ] Retrying immediately after we've received a 'transitioning' sense code is pretty much pointless, we should always use a delay before retrying. So ensure the default delay is applied before retrying. Signed-off-by: Hannes Reinecke Tested-by: Zhangguanghui Signed-off-by: Martin K. Petersen Signed-off-by: Sasha Levin

scsi: scsi_dh_alua: Fix possible null-ptr-deref

2019-06-22T06:15:21Z

[ Upstream commit 12e750bc62044de096ab9a95201213fd912b9994 ] If alloc_workqueue fails in alua_init, it should return -ENOMEM, otherwise it will trigger null-ptr-deref while unloading module which calls destroy_workqueue dereference wq->lock like this: BUG: KASAN: null-ptr-deref in __lock_acquire+0x6b4/0x1ee0 Read of size 8 at addr 0000000000000080 by task syz-executor.0/7045 CPU: 0 PID: 7045 Comm: syz-executor.0 Tainted: G C 5.1.0+ #28 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1ubuntu1 Call Trace: dump_stack+0xa9/0x10e __kasan_report+0x171/0x18d ? __lock_acquire+0x6b4/0x1ee0 kasan_report+0xe/0x20 __lock_acquire+0x6b4/0x1ee0 lock_acquire+0xb4/0x1b0 __mutex_lock+0xd8/0xb90 drain_workqueue+0x25/0x290 destroy_workqueue+0x1f/0x3f0 __x64_sys_delete_module+0x244/0x330 do_syscall_64+0x72/0x2a0 entry_SYSCALL_64_after_hwframe+0x49/0xbe Reported-by: Hulk Robot Fixes: 03197b61c5ec ("scsi_dh_alua: Use workqueue for RTPG") Signed-off-by: YueHaibing Reviewed-by: Bart Van Assche Signed-off-by: Martin K. Petersen Signed-off-by: Sasha Levin

Merge branch 'fixes' into misc

2018-04-04T00:38:39Z

Somewhat nasty merge due to conflicts between "33b28357dd00 scsi: qla2xxx: Fix Async GPN_FT for FCP and FC-NVMe scan" and "2b5b96473efc scsi: qla2xxx: Fix FC-NVMe LUN discovery" Merge is non-trivial and has been verified by Qlogic (Cavium) Signed-off-by: James E.J. Bottomley

scsi: scsi_dh_alua: Correct comment for alua_alloc_pg()

2018-03-15T04:32:02Z

In the comment for function alua_alloc_pg() the argument '@h' is mistakenly referred to. Fix this by replacing it with the correct argument reference, '@tpgs', and provide a short description. Signed-off-by: John Pittman Reviewed-by Laurence Oberman Signed-off-by: Martin K. Petersen

scsi: device_handler: remove VLAs

2018-03-13T02:37:20Z

In preparation to enabling -Wvla, remove VLAs and replace them with fixed-length arrays instead. scsi_dh_{alua,emc,rdac} use variable-length array declarations to store command blocks, with the appropriate size as determined by COMMAND_SIZE. This patch replaces these with fixed-sized arrays using MAX_COMMAND_SIZE, so that the array size can be determined at compile time. This was prompted by https://lkml.org/lkml/2018/3/7/621 Signed-off-by: Stephen Kitt Reviewed-by: Hannes Reinecke Signed-off-by: Martin K. Petersen

scsi: scsi_dh: Document alua_rtpg_queue() arguments

2018-01-31T03:26:26Z

Since commit 3a025e1d1c2e ("Add optional check for bad kernel-doc comments") building with W=1 causes warnings to appear for issues in kernel-doc headers. This patch avoids that the following warnings are reported when building with W=1: drivers/scsi/device_handler/scsi_dh_alua.c:867: warning: No description found for parameter 'pg' drivers/scsi/device_handler/scsi_dh_alua.c:867: warning: No description found for parameter 'sdev' drivers/scsi/device_handler/scsi_dh_alua.c:867: warning: No description found for parameter 'qdata' drivers/scsi/device_handler/scsi_dh_alua.c:867: warning: No description found for parameter 'force' Signed-off-by: Bart Van Assche Cc: Christoph Hellwig Cc: Hannes Reinecke Cc: Johannes Thumshirn Reviewed-by: Hannes Reinecke Reviewed-by: Johannes Thumshirn Signed-off-by: Martin K. Petersen

scsi: scsi_dh_alua: skip RTPG for devices only supporting active/optimized

2018-01-11T04:25:11Z

For hardware only supporting active/optimized there's no point in ever re-issuing RTPG as the only new state we can possibly read is active/optimized. This avoid spurious errors during path failover on such arrays. Signed-off-by: Hannes Reinecke Reviewed-by: Bart Van Assche Signed-off-by: Martin K. Petersen

scsi: scsi_dh: Return SCSI_DH_XX error code from ->attach()

2017-09-25T23:03:14Z

Rather than having each device handler implementing their own error mapping, have the ->attach() call return a SCSI_DH_XXX error code and implement the mapping in scsi_dh_handler_attach(). Suggested-by: Christoph Hellwig Signed-off-by: Hannes Reinecke Reviewed-by: Johannes Thumshirn Signed-off-by: Martin K. Petersen