Commit Graph

2478 Commits

Author SHA1 Message Date
Chaitanya Kulkarni 75b5f9edb5 nvmet: replace white spaces with tabs
Instead of the using the whitespaces use tab spacing in the
nvmet_execute_identify_ns().

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-04-02 18:48:25 +02:00
Chaitanya Kulkarni 7798df6fcf nvmet: remove an unnecessary function parameter to nvmet_check_ctrl_status
In nvmet_check_ctrl_status() cmd can be derived from nvmet_req. Remove
the local variable cmd in the nvmet_check_ctrl_status() and function
parameter cmd for nvmet_check_ctrl_status(). Derive the cmd value from
req parameter in the nvmet_check_ctrl_status().

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-04-02 18:48:25 +02:00
Chaitanya Kulkarni a56f14c26d nvmet: update error log page in nvmet_alloc_ctrl()
Instead of updating the error log page in the caller of the
nvmet_alloc_ctrt() update the error log page in the nvmet_alloc_ctrl().

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-04-02 18:48:25 +02:00
Chaitanya Kulkarni 76affbe6d6 nvmet: remove a duplicate status assignment in nvmet_alloc_ctrl
In the function nvmet_alloc_ctrl() we assign status value before we
call nvmet_fine_get_subsys() to:

	status = NVME_SC_CONNECT_INVALID_PARAM | NVME_SC_DNR;

After we successfully find the subsystem we again set the status value
to:

	status = NVME_SC_CONNECT_INVALID_PARAM | NVME_SC_DNR;

Remove the duplicate status assignment value.

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-04-02 18:48:25 +02:00
Chaitanya Kulkarni 05fae499a9 nvme-pci: cleanup nvme_irq()
Get rid of a local variable that is not needed and just return the
status directly.

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-04-02 18:48:25 +02:00
Chaitanya Kulkarni e9c78c2335 nvme-pci: remove the barriers in nvme_irq()
The barriers were added to the nvme_irq() in commit 3a7afd8ee4
("nvme-pci: remove the CQ lock for interrupt driven queues") to prevent
compiler from doing memory optimization for the variabes that were
protected previously by spinlock in nvme_irq() at completion queue
processing and with queue head check condition.

The variable nvmeq->last_cq_head from those checks was removed in the
commit f6c4d97b0d ("nvme/pci: Remove last_cq_head") that was not
allwing poll queues from mistakenly triggering the spurious interrupt
detection.

Remove the barriers which were protecting the updates to the variables.

Reported-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-04-02 18:48:24 +02:00
Elad Grupi bac04454ef nvmet-tcp: fix kmap leak when data digest in use
When data digest is enabled we should unmap pdu iovec before handling
the data digest pdu.

Signed-off-by: Elad Grupi <elad.grupi@dell.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-03-18 05:39:18 +01:00
Sagi Grimberg d218a8a300 nvmet: don't check iosqes,iocqes for discovery controllers
From the base spec, Figure 78:

  "Controller Configuration, these fields are defined as parameters to
   configure an "I/O Controller (IOC)" and not to configure a "Discovery
   Controller (DC).

   ...
   If the controller does not support I/O queues, then this field shall
   be read-only with a value of 0h

Just perform this check for I/O controllers.

Fixes: a07b4970f4 ("nvmet: add a generic NVMe target")
Reported-by: Belanger, Martin <Martin.Belanger@dell.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-03-18 05:39:02 +01:00
Sagi Grimberg c4c6df5fc8 nvme-rdma: fix possible hang when failing to set io queues
We only setup io queues for nvme controllers, and it makes absolutely no
sense to allow a controller (re)connect without any I/O queues.  If we
happen to fail setting the queue count for any reason, we should not allow
this to be a successful reconnect as I/O has no chance in going through.
Instead just fail and schedule another reconnect.

Reported-by: Chao Leng <lengchao@huawei.com>
Fixes: 7110230719 ("nvme-rdma: add a NVMe over Fabrics RDMA host driver")
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chao Leng <lengchao@huawei.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-03-18 05:39:01 +01:00
Sagi Grimberg 72f572428b nvme-tcp: fix possible hang when failing to set io queues
We only setup io queues for nvme controllers, and it makes absolutely no
sense to allow a controller (re)connect without any I/O queues.  If we
happen to fail setting the queue count for any reason, we should not
allow this to be a successful reconnect as I/O has no chance in going
through. Instead just fail and schedule another reconnect.

Fixes: 3f2304f8c6 ("nvme-tcp: add NVMe over TCP host driver")
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-03-18 05:39:01 +01:00
Sagi Grimberg bb83337058 nvme-tcp: fix misuse of __smp_processor_id with preemption enabled
For our pure advisory use-case, we only rely on this call as a hint, so
fix the warning complaints of using the smp_processor_id variants with
preemption enabled.

Fixes: db5ad6b7f8 ("nvme-tcp: try to send request in queue_rq context")
Fixes: ada8317721 ("nvme-tcp: Fix warning with CONFIG_DEBUG_PREEMPT")
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Tested-by: Yi Zhang <yi.zhang@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-03-18 05:39:01 +01:00
Sagi Grimberg fd0823f405 nvme-tcp: fix a NULL deref when receiving a 0-length r2t PDU
When the controller sends us a 0-length r2t PDU we should not attempt to
try to set up a h2cdata PDU but rather conclude that this is a buggy
controller (forward progress is not possible) and simply fail it
immediately.

Fixes: 3f2304f8c6 ("nvme-tcp: add NVMe over TCP host driver")
Reported-by: Belanger, Martin <Martin.Belanger@dell.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-03-18 05:39:01 +01:00
Christoph Hellwig b94e8cd2e6 nvme: fix Write Zeroes limitations
We voluntarily limit the Write Zeroes sizes to the MDTS value provided by
the hardware, but currently get the units wrong, so fix that.

Fixes: 6e02318eae ("nvme: add support for the Write Zeroes command")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Tested-by: Klaus Jensen <k.jensen@samsung.com>
Reviewed-by: Klaus Jensen <k.jensen@samsung.com>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
2021-03-18 05:38:49 +01:00
Christoph Hellwig 985c5a329d nvme: allocate the keep alive request using BLK_MQ_REQ_NOWAIT
To avoid an error recovery deadlock where the keep alive work is waiting
for a request and thus can't be flushed to make progress for tearing down
the controller.  Also print the error code returned from
blk_mq_alloc_request to help debugging any future issues in this code.

Based on an earlier patch from Hannes Reinecke <hare@suse.de>.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Daniel Wagner <dwagner@suse.de>
2021-03-18 05:38:48 +01:00
Christoph Hellwig 06c3c3365b nvme: merge nvme_keep_alive into nvme_keep_alive_work
Merge nvme_keep_alive into its only caller to prepare for additional
changes to this code.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Daniel Wagner <dwagner@suse.de>
2021-03-18 05:38:48 +01:00
Christoph Hellwig ed01fee283 nvme-fabrics: only reserve a single tag
Fabrics drivers currently reserve two tags on the admin queue.  But
given that the connect command is only run on a freshly created queue
or after all commands have been force aborted we only need to reserve
a single tag.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Daniel Wagner <dwagner@suse.de>
2021-03-18 05:38:48 +01:00
Christoph Hellwig f4f9fc29e5 nvme: fix the nsid value to print in nvme_validate_or_alloc_ns
ns can be NULL at this point, and my move of the check from
the original patch by Chaitanya broke this.

Fixes: 0ec84df495 ("nvme-core: check ctrl css before setting up zns")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-03-12 13:17:45 -07:00
Jens Axboe d4b64fd702 nvme fixes for 5.12:
- one more quirk (Dmitry Monakhov)
  - fix max_zone_append_sectors initialization (Chaitanya Kulkarni)
  - nvme-fc reset/create race fix (James Smart)
  - fix status code on aborts/resets (Hannes Reinecke)
  - fix the CSS check for ZNS namespaces (Chaitanya Kulkarni)
  - fix a use after free in a debug printk in nvme-rdma (Lv Yunlong)
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Merge tag 'nvme-5.12-2021-03-12' of git://git.infradead.org/nvme into block-5.12

Pull NVMe fixes from Christoph:

"nvme fixes for 5.12:

 - one more quirk (Dmitry Monakhov)
 - fix max_zone_append_sectors initialization (Chaitanya Kulkarni)
 - nvme-fc reset/create race fix (James Smart)
 - fix status code on aborts/resets (Hannes Reinecke)
 - fix the CSS check for ZNS namespaces (Chaitanya Kulkarni)
 - fix a use after free in a debug printk in nvme-rdma (Lv Yunlong)"

* tag 'nvme-5.12-2021-03-12' of git://git.infradead.org/nvme:
  nvme-pci: add the DISABLE_WRITE_ZEROES quirk for a Samsung PM1725a
  nvme-rdma: Fix a use after free in nvmet_rdma_write_data_done
  nvme-core: check ctrl css before setting up zns
  nvme-fc: fix racing controller reset and create association
  nvme-fc: return NVME_SC_HOST_ABORTED_CMD when a command has been aborted
  nvme-fc: set NVME_REQ_CANCELLED in nvme_fc_terminate_exchange()
  nvme: add NVME_REQ_CANCELLED flag in nvme_cancel_request()
  nvme: simplify error logic in nvme_validate_ns()
  nvme: set max_zone_append_sectors nvme_revalidate_zones
2021-03-12 07:21:15 -07:00
Christoph Hellwig a8affc03a9 block: rename BIO_MAX_PAGES to BIO_MAX_VECS
Ever since the addition of multipage bio_vecs BIO_MAX_PAGES has been
horribly confusingly misnamed.  Rename it to BIO_MAX_VECS to stop
confusing users of the bio API.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20210311110137.1132391-2-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-03-11 07:47:48 -07:00
Dmitry Monakhov abbb5f5929 nvme-pci: add the DISABLE_WRITE_ZEROES quirk for a Samsung PM1725a
This adds a quirk for Samsung PM1725a drive which fixes timeouts and
I/O errors due to the fact that the controller does not properly
handle the Write Zeroes command, dmesg log:

nvme nvme0: I/O 528 QID 10 timeout, aborting
nvme nvme0: I/O 529 QID 10 timeout, aborting
nvme nvme0: I/O 530 QID 10 timeout, aborting
nvme nvme0: I/O 531 QID 10 timeout, aborting
nvme nvme0: I/O 532 QID 10 timeout, aborting
nvme nvme0: I/O 533 QID 10 timeout, aborting
nvme nvme0: I/O 534 QID 10 timeout, aborting
nvme nvme0: I/O 535 QID 10 timeout, aborting
nvme nvme0: Abort status: 0x0
nvme nvme0: Abort status: 0x0
nvme nvme0: Abort status: 0x0
nvme nvme0: Abort status: 0x0
nvme nvme0: Abort status: 0x0
nvme nvme0: Abort status: 0x0
nvme nvme0: Abort status: 0x0
nvme nvme0: Abort status: 0x0
nvme nvme0: I/O 528 QID 10 timeout, reset controller
nvme nvme0: controller is down; will reset: CSTS=0x3, PCI_STATUS=0x10
nvme nvme0: Device not ready; aborting reset, CSTS=0x3
nvme nvme0: Device not ready; aborting reset, CSTS=0x3
nvme nvme0: Removing after probe failure status: -19
nvme0n1: detected capacity change from 6251233968 to 0
blk_update_request: I/O error, dev nvme0n1, sector 32776 op 0x1:(WRITE) flags 0x3000 phys_seg 6 prio class 0
blk_update_request: I/O error, dev nvme0n1, sector 113319936 op 0x9:(WRITE_ZEROES) flags 0x800 phys_seg 0 prio class 0
Buffer I/O error on dev nvme0n1p2, logical block 1, lost async page write
blk_update_request: I/O error, dev nvme0n1, sector 113319680 op 0x9:(WRITE_ZEROES) flags 0x0 phys_seg 0 prio class 0
Buffer I/O error on dev nvme0n1p2, logical block 2, lost async page write
blk_update_request: I/O error, dev nvme0n1, sector 113319424 op 0x9:(WRITE_ZEROES) flags 0x0 phys_seg 0 prio class 0
Buffer I/O error on dev nvme0n1p2, logical block 3, lost async page write
blk_update_request: I/O error, dev nvme0n1, sector 113319168 op 0x9:(WRITE_ZEROES) flags 0x0 phys_seg 0 prio class 0
Buffer I/O error on dev nvme0n1p2, logical block 4, lost async page write
blk_update_request: I/O error, dev nvme0n1, sector 113318912 op 0x9:(WRITE_ZEROES) flags 0x0 phys_seg 0 prio class 0
Buffer I/O error on dev nvme0n1p2, logical block 5, lost async page write
blk_update_request: I/O error, dev nvme0n1, sector 113318656 op 0x9:(WRITE_ZEROES) flags 0x0 phys_seg 0 prio class 0
Buffer I/O error on dev nvme0n1p2, logical block 6, lost async page write
blk_update_request: I/O error, dev nvme0n1, sector 113318400 op 0x9:(WRITE_ZEROES) flags 0x0 phys_seg 0 prio class 0
blk_update_request: I/O error, dev nvme0n1, sector 113318144 op 0x9:(WRITE_ZEROES) flags 0x0 phys_seg 0 prio class 0
blk_update_request: I/O error, dev nvme0n1, sector 113317888 op 0x9:(WRITE_ZEROES) flags 0x0 phys_seg 0 prio class 0

Signed-off-by: Dmitry Monakhov <dmtrmonakhov@yandex-team.ru>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-03-11 11:48:54 +01:00
Lv Yunlong abec6561fc nvme-rdma: Fix a use after free in nvmet_rdma_write_data_done
In nvmet_rdma_write_data_done, rsp is recoverd by wc->wr_cqe and freed by
nvmet_rdma_release_rsp(). But after that, pr_info() used the freed
chunk's member object and could leak the freed chunk address with
wc->wr_cqe by computing the offset.

Signed-off-by: Lv Yunlong <lyl2019@mail.ustc.edu.cn>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-03-11 11:48:35 +01:00
Chaitanya Kulkarni 0ec84df495 nvme-core: check ctrl css before setting up zns
Ensure multiple Command Sets are supported before starting to setup a
ZNS namespace.

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
[hch: move the check around a bit]
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-03-11 11:48:35 +01:00
James Smart f20ef34d71 nvme-fc: fix racing controller reset and create association
Recent patch to prevent calling __nvme_fc_abort_outstanding_ios in
interrupt context results in a possible race condition. A controller
reset results in errored io completions, which schedules error
work. The change of error work to a work element allows it to fire
after the ctrl state transition to NVME_CTRL_CONNECTING, causing
any outstanding io (used to initialize the controller) to fail and
cause problems for connect_work.

Add a state check to only schedule error work if not in the RESETTING
state.

Fixes: 19fce0470f ("nvme-fc: avoid calling _nvme_fc_abort_outstanding_ios from interrupt context")
Signed-off-by: Nigel Kirkland <nkirkland2304@gmail.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-03-11 11:48:35 +01:00
Hannes Reinecke ae3afe6308 nvme-fc: return NVME_SC_HOST_ABORTED_CMD when a command has been aborted
When a command has been aborted we should return NVME_SC_HOST_ABORTED_CMD
to be consistent with the other transports.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Daniel Wagner <dwagner@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-03-11 11:48:34 +01:00
Hannes Reinecke 3c7aafbc8d nvme-fc: set NVME_REQ_CANCELLED in nvme_fc_terminate_exchange()
nvme_fc_terminate_exchange() is being called when exchanges are
being deleted, and as such we should be setting the NVME_REQ_CANCELLED
flag to have identical behaviour on all transports.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Daniel Wagner <dwagner@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-03-11 11:48:34 +01:00
Hannes Reinecke d358938198 nvme: add NVME_REQ_CANCELLED flag in nvme_cancel_request()
NVME_REQ_CANCELLED is translated into -EINTR in nvme_submit_sync_cmd(),
so we should be setting this flags during nvme_cancel_request() to
ensure that the callers to nvme_submit_sync_cmd() will get the correct
error code when the controller is reset.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chao Leng <lengchao@huawei.com>
Reviewed-by: Daniel Wagner <dwagner@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-03-11 11:48:34 +01:00
Hannes Reinecke d95c1f4179 nvme: simplify error logic in nvme_validate_ns()
We only should remove namespaces when we get fatal error back from
the device or when the namespace IDs have changed.
So instead of painfully masking out error numbers which might indicate
that the error should be ignored we could use an NVME status code
to indicated when the namespace should be removed.
That simplifies the final logic and makes it less error-prone.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Daniel Wagner <dwagner@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-03-11 11:48:34 +01:00
Chaitanya Kulkarni e6ad55988b nvme: set max_zone_append_sectors nvme_revalidate_zones
The chunk_sectors value affects max_zone_append_sectors.

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Tested-by: Kanchan Joshi <joshi.k@samsung.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-03-11 11:48:34 +01:00
Max Gurtovoy d9f273b758 nvmet: model_number must be immutable once set
In case we have already established connection to nvmf target, it
shouldn't be allowed to change the model_number. E.g. if someone will
identify ctrl and get model_number of "my_model" later on will change
the model_numbel via configfs to "my_new_model" this will break the NVMe
specification for "Get Log Page – Persistent Event Log" that refers to
Model Number as: "This field contains the same value as reported in the
Model Number field of the Identify Controller data structure, bytes
63:24."

Although it doesn't mentioned explicitly that this field can't be
changed, we can assume it.

So allow setting this field only once: using configfs or in the first
identify ctrl operation.

Signed-off-by: Max Gurtovoy <mgurtovoy@nvidia.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-03-05 13:41:03 +01:00
Martin George 32feb6de47 nvme-fabrics: fix kato initialization
Currently kato is initialized to NVME_DEFAULT_KATO for both
discovery & i/o controllers. This is a problem specifically
for non-persistent discovery controllers since it always ends
up with a non-zero kato value. Fix this by initializing kato
to zero instead, and ensuring various controllers are assigned
appropriate kato values as follows:

non-persistent controllers  - kato set to zero
persistent controllers      - kato set to NVMF_DEV_DISC_TMO
                              (or any positive int via nvme-cli)
i/o controllers             - kato set to NVME_DEFAULT_KATO
                              (or any positive int via nvme-cli)

Signed-off-by: Martin George <marting@netapp.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-03-05 13:41:03 +01:00
Daniel Wagner 78570f8873 nvme-hwmon: Return error code when registration fails
The hwmon pointer wont be NULL if the registration fails. Though the
exit code path will assign it to ctrl->hwmon_device. Later
nvme_hwmon_exit() will try to free the invalid pointer. Avoid this by
returning the error code from hwmon_device_register_with_info().

Fixes: ed7770f662 ("nvme/hwmon: rework to avoid devm allocation")
Signed-off-by: Daniel Wagner <dwagner@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-03-05 13:41:03 +01:00
Pascal Terjan 6e6a6828c5 nvme-pci: add quirks for Lexar 256GB SSD
Add the NVME_QUIRK_NO_NS_DESC_LIST and NVME_QUIRK_IGNORE_DEV_SUBNQN
quirks for this buggy device.

Reported and tested in https://bugs.mageia.org/show_bug.cgi?id=28417

Signed-off-by: Pascal Terjan <pterjan@google.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-03-05 13:41:03 +01:00
Zoltán Böszörményi dc22c1c058 nvme-pci: mark Kingston SKC2000 as not supporting the deepest power state
My 2TB SKC2000 showed the exact same symptoms that were provided
in 538e4a8c57 ("nvme-pci: avoid the deepest sleep state on
Kingston A2000 SSDs"), i.e. a complete NVME lockup that needed
cold boot to get it back.

According to some sources, the A2000 is simply a rebadged
SKC2000 with a slightly optimized firmware.

Adding the SKC2000 PCI ID to the quirk list with the same workaround
as the A2000 made my laptop survive a 5 hours long Yocto bootstrap
buildfest which reliably triggered the SSD lockup previously.

Signed-off-by: Zoltán Böszörményi <zboszor@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-03-05 13:41:03 +01:00
Julian Einwag 5e112d3fb8 nvme-pci: mark Seagate Nytro XM1440 as QUIRK_NO_NS_DESC_LIST.
The kernel fails to fully detect these SSDs, only the character devices
are present:

[   10.785605] nvme nvme0: pci function 0000:04:00.0
[   10.876787] nvme nvme1: pci function 0000:81:00.0
[   13.198614] nvme nvme0: missing or invalid SUBNQN field.
[   13.198658] nvme nvme1: missing or invalid SUBNQN field.
[   13.206896] nvme nvme0: Shutdown timeout set to 20 seconds
[   13.215035] nvme nvme1: Shutdown timeout set to 20 seconds
[   13.225407] nvme nvme0: 16/0/0 default/read/poll queues
[   13.233602] nvme nvme1: 16/0/0 default/read/poll queues
[   13.239627] nvme nvme0: Identify Descriptors failed (8194)
[   13.246315] nvme nvme1: Identify Descriptors failed (8194)

Adding the NVME_QUIRK_NO_NS_DESC_LIST fixes this problem.

BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=205679
Signed-off-by: Julian Einwag <jeinwag-nvme@marcapo.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
2021-03-05 13:40:55 +01:00
Linus Torvalds 3ab6608e66 block-5.12-2021-02-27
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Merge tag 'block-5.12-2021-02-27' of git://git.kernel.dk/linux-block

Pull more block updates from Jens Axboe:
 "A few stragglers (and one due to me missing it originally), and fixes
  for changes in this merge window mostly. In particular:

   - blktrace cleanups (Chaitanya, Greg)

   - Kill dead blk_pm_* functions (Bart)

   - Fixes for the bio alloc changes (Christoph)

   - Fix for the partition changes (Christoph, Ming)

   - Fix for turning off iopoll with polled IO inflight (Jeffle)

   - nbd disconnect fix (Josef)

   - loop fsync error fix (Mauricio)

   - kyber update depth fix (Yang)

   - max_sectors alignment fix (Mikulas)

   - Add bio_max_segs helper (Matthew)"

* tag 'block-5.12-2021-02-27' of git://git.kernel.dk/linux-block: (21 commits)
  block: Add bio_max_segs
  blktrace: fix documentation for blk_fill_rw()
  block: memory allocations in bounce_clone_bio must not fail
  block: remove the gfp_mask argument to bounce_clone_bio
  block: fix bounce_clone_bio for passthrough bios
  block-crypto-fallback: use a bio_set for splitting bios
  block: fix logging on capacity change
  blk-settings: align max_sectors on "logical_block_size" boundary
  block: reopen the device in blkdev_reread_part
  block: don't skip empty device in in disk_uevent
  blktrace: remove debugfs file dentries from struct blk_trace
  nbd: handle device refs for DESTROY_ON_DISCONNECT properly
  kyber: introduce kyber_depth_updated()
  loop: fix I/O error on fsync() in detached loop devices
  block: fix potential IO hang when turning off io_poll
  block: get rid of the trace rq insert wrapper
  blktrace: fix blk_rq_merge documentation
  blktrace: fix blk_rq_issue documentation
  blktrace: add blk_fill_rwbs documentation comment
  block: remove superfluous param in blk_fill_rwbs()
  ...
2021-02-28 11:23:38 -08:00
Matthew Wilcox (Oracle) 5f7136db82 block: Add bio_max_segs
It's often inconvenient to use BIO_MAX_PAGES due to min() requiring the
sign to be the same.  Introduce bio_max_segs() and change BIO_MAX_PAGES to
be unsigned to make it easier for the users.

Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-02-26 15:49:51 -07:00
Linus Torvalds ef9856a734 Merge branch 'stable/for-linus-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb
Pull swiotlb updates from Konrad Rzeszutek Wilk:
 "Two memory encryption related patches (SWIOTLB is enabled by default
  for AMD-SEV):

   - Add support for alignment so that NVME can properly work

   - Keep track of requested DMA buffers length, as underlaying hardware
     devices can trip SWIOTLB to bounce too much and crash the kernel

  And a tiny fix to use proper APIs in drivers"

* 'stable/for-linus-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb:
  swiotlb: Validate bounce size in the sync/unmap path
  nvme-pci: set min_align_mask
  swiotlb: respect min_align_mask
  swiotlb: don't modify orig_addr in swiotlb_tbl_sync_single
  swiotlb: refactor swiotlb_tbl_map_single
  swiotlb: clean up swiotlb_tbl_unmap_single
  swiotlb: factor out a nr_slots helper
  swiotlb: factor out an io_tlb_offset helper
  swiotlb: add a IO_TLB_SIZE define
  driver core: add a min_align_mask field to struct device_dma_parameters
  sdhci: stop poking into swiotlb internals
2021-02-26 13:59:32 -08:00
Jianxiong Gao 3d2d861eb0 nvme-pci: set min_align_mask
The PRP addressing scheme requires all PRP entries except for the
first one to have a zero offset into the NVMe controller pages (which
can be different from the Linux PAGE_SIZE).  Use the min_align_mask
device parameter to ensure that swiotlb does not change the address
of the buffer modulo the device page size to ensure that the PRPs
won't be malformed.

Signed-off-by: Jianxiong Gao <jxgao@google.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Jianxiong Gao <jxgao@google.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2021-02-26 10:52:50 -05:00
Linus Torvalds 9820b4dca0 for-5.12/drivers-2021-02-17
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Merge tag 'for-5.12/drivers-2021-02-17' of git://git.kernel.dk/linux-block

Pull block driver updates from Jens Axboe:

 - Remove the skd driver. It's been EOL for a long time (Damien)

 - NVMe pull requests
      - fix multipath handling of ->queue_rq errors (Chao Leng)
      - nvmet cleanups (Chaitanya Kulkarni)
      - add a quirk for buggy Amazon controller (Filippo Sironi)
      - avoid devm allocations in nvme-hwmon that don't interact well
        with fabrics (Hannes Reinecke)
      - sysfs cleanups (Jiapeng Chong)
      - fix nr_zones for multipath (Keith Busch)
      - nvme-tcp crash fix for no-data commands (Sagi Grimberg)
      - nvmet-tcp fixes (Sagi Grimberg)
      - add a missing __rcu annotation (Christoph)
      - failed reconnect fixes (Chao Leng)
      - various tracing improvements (Michal Krakowiak, Johannes
        Thumshirn)
      - switch the nvmet-fc assoc_list to use RCU protection (Leonid
        Ravich)
      - resync the status codes with the latest spec (Max Gurtovoy)
      - minor nvme-tcp improvements (Sagi Grimberg)
      - various cleanups (Rikard Falkeborn, Minwoo Im, Chaitanya
        Kulkarni, Israel Rukshin)

 - Floppy O_NDELAY fix (Denis)

 - MD pull request
      - raid5 chunk_sectors fix (Guoqing)

 - Use lore links (Kees)

 - Use DEFINE_SHOW_ATTRIBUTE for nbd (Liao)

 - loop lock scaling (Pavel)

 - mtip32xx PCI fixes (Bjorn)

 - bcache fixes (Kai, Dongdong)

 - Misc fixes (Tian, Yang, Guoqing, Joe, Andy)

* tag 'for-5.12/drivers-2021-02-17' of git://git.kernel.dk/linux-block: (64 commits)
  lightnvm: pblk: Replace guid_copy() with export_guid()/import_guid()
  lightnvm: fix unnecessary NULL check warnings
  nvme-tcp: fix crash triggered with a dataless request submission
  block: Replace lkml.org links with lore
  nbd: Convert to DEFINE_SHOW_ATTRIBUTE
  nvme: add 48-bit DMA address quirk for Amazon NVMe controllers
  nvme-hwmon: rework to avoid devm allocation
  nvmet: remove else at the end of the function
  nvmet: add nvmet_req_subsys() helper
  nvmet: use min of device_path and disk len
  nvmet: use invalid cmd opcode helper
  nvmet: use invalid cmd opcode helper
  nvmet: add helper to report invalid opcode
  nvmet: remove extra variable in id-ns handler
  nvmet: make nvmet_find_namespace() req based
  nvmet: return uniform error for invalid ns
  nvmet: set status to 0 in case for invalid nsid
  nvmet-fc: add a missing __rcu annotation to nvmet_fc_tgt_assoc.queues
  nvme-multipath: set nr_zones for zoned namespaces
  nvmet-tcp: fix potential race of tcp socket closing accept_work
  ...
2021-02-21 11:06:54 -08:00
Linus Torvalds 582cd91f69 for-5.12/block-2021-02-17
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Merge tag 'for-5.12/block-2021-02-17' of git://git.kernel.dk/linux-block

Pull core block updates from Jens Axboe:
 "Another nice round of removing more code than what is added, mostly
  due to Christoph's relentless pursuit of tech debt removal/cleanups.
  This pull request contains:

   - Two series of BFQ improvements (Paolo, Jan, Jia)

   - Block iov_iter improvements (Pavel)

   - bsg error path fix (Pan)

   - blk-mq scheduler improvements (Jan)

   - -EBUSY discard fix (Jan)

   - bvec allocation improvements (Ming, Christoph)

   - bio allocation and init improvements (Christoph)

   - Store bdev pointer in bio instead of gendisk + partno (Christoph)

   - Block trace point cleanups (Christoph)

   - hard read-only vs read-only split (Christoph)

   - Block based swap cleanups (Christoph)

   - Zoned write granularity support (Damien)

   - Various fixes/tweaks (Chunguang, Guoqing, Lei, Lukas, Huhai)"

* tag 'for-5.12/block-2021-02-17' of git://git.kernel.dk/linux-block: (104 commits)
  mm: simplify swapdev_block
  sd_zbc: clear zone resources for non-zoned case
  block: introduce blk_queue_clear_zone_settings()
  zonefs: use zone write granularity as block size
  block: introduce zone_write_granularity limit
  block: use blk_queue_set_zoned in add_partition()
  nullb: use blk_queue_set_zoned() to setup zoned devices
  nvme: cleanup zone information initialization
  block: document zone_append_max_bytes attribute
  block: use bi_max_vecs to find the bvec pool
  md/raid10: remove dead code in reshape_request
  block: mark the bio as cloned in bio_iov_bvec_set
  block: set BIO_NO_PAGE_REF in bio_iov_bvec_set
  block: remove a layer of indentation in bio_iov_iter_get_pages
  block: turn the nr_iovecs argument to bio_alloc* into an unsigned short
  block: remove the 1 and 4 vec bvec_slabs entries
  block: streamline bvec_alloc
  block: factor out a bvec_alloc_gfp helper
  block: move struct biovec_slab to bio.c
  block: reuse BIO_INLINE_VECS for integrity bvecs
  ...
2021-02-21 11:02:48 -08:00
Sagi Grimberg e11e511617 nvme-tcp: fix crash triggered with a dataless request submission
write-zeros has a bio, but does not have any data buffers associated
with it. Hence should not initialize the request iter for it (which
attempts to reference the bi_io_vec (and crash).
--
 run blktests nvme/012 at 2021-02-05 21:53:34
 BUG: kernel NULL pointer dereference, address: 0000000000000008
 #PF: supervisor read access in kernel mode
 #PF: error_code(0x0000) - not-present page
 PGD 0 P4D 0
 Oops: 0000 [#1] SMP NOPTI
 CPU: 15 PID: 12069 Comm: kworker/15:2H Tainted: G S        I       5.11.0-rc6+ #1
 Hardware name: Dell Inc. PowerEdge R640/06NR82, BIOS 2.10.0 11/12/2020
 Workqueue: kblockd blk_mq_run_work_fn
 RIP: 0010:nvme_tcp_init_iter+0x7d/0xd0 [nvme_tcp]
 RSP: 0018:ffffbd084447bd18 EFLAGS: 00010246
 RAX: 0000000000000000 RBX: ffffa0bba9f3ce80 RCX: 0000000000000000
 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000002000000
 RBP: ffffa0ba8ac6fec0 R08: 0000000002000000 R09: 0000000000000000
 R10: 0000000002800809 R11: 0000000000000000 R12: 0000000000000000
 R13: ffffa0bba9f3cf90 R14: 0000000000000000 R15: 0000000000000000
 FS:  0000000000000000(0000) GS:ffffa0c9ff9c0000(0000) knlGS:0000000000000000
 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
 CR2: 0000000000000008 CR3: 00000001c9c6c005 CR4: 00000000007706e0
 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
 PKRU: 55555554
 Call Trace:
  nvme_tcp_queue_rq+0xef/0x330 [nvme_tcp]
  blk_mq_dispatch_rq_list+0x11c/0x7c0
  ? blk_mq_flush_busy_ctxs+0xf6/0x110
  __blk_mq_sched_dispatch_requests+0x12b/0x170
  blk_mq_sched_dispatch_requests+0x30/0x60
  __blk_mq_run_hw_queue+0x2b/0x60
  process_one_work+0x1cb/0x360
  ? process_one_work+0x360/0x360
  worker_thread+0x30/0x370
  ? process_one_work+0x360/0x360
  kthread+0x116/0x130
  ? kthread_park+0x80/0x80
  ret_from_fork+0x1f/0x30
--

Fixes: cb9b870fba ("nvme-tcp: fix wrong setting of request iov_iter")
Reported-by: Yi Zhang <yi.zhang@redhat.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Tested-by: Yi Zhang <yi.zhang@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-02-11 08:04:51 +01:00
Filippo Sironi 4bdf260362 nvme: add 48-bit DMA address quirk for Amazon NVMe controllers
Some Amazon NVMe controllers do not follow the NVMe specification
and are limited to 48-bit DMA addresses.  Add a quirk to force
bounce buffering if needed and limit the IOVA allocation for these
devices.

This affects all current Amazon NVMe controllers that expose EBS
volumes (0x0061, 0x0065, 0x8061) and local instance storage
(0xcd00, 0xcd01, 0xcd02).

Signed-off-by: Filippo Sironi <sironi@amazon.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-02-10 16:38:06 +01:00
Hannes Reinecke ed7770f662 nvme-hwmon: rework to avoid devm allocation
The original design to use device-managed resource allocation
doesn't really work as the NVMe controller has a vastly different
lifetime than the hwmon sysfs attributes, causing warning about
duplicate sysfs entries upon reconnection.
This patch reworks the hwmon allocation to avoid device-managed
resource allocation, and uses the NVMe controller as parent for
the sysfs attributes.

Cc: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Tested-by: Enzo Matsumiya <ematsumiya@suse.de>
Tested-by: Daniel Wagner <dwagner@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-02-10 16:38:06 +01:00
Chaitanya Kulkarni 295a39f5a5 nvmet: remove else at the end of the function
The function nvmet_parse_io_cmd() returns value from
nvmet_file_parse_io_cmd() or nvmet_bdev_parse_io_cmd() based on which
backend is set for the request. Remove the else and just return the
value from nvmet_bdev_parse_io_cmd().

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-02-10 16:38:06 +01:00
Chaitanya Kulkarni 20c2c3bb83 nvmet: add nvmet_req_subsys() helper
Just like what we have to get the passthru ctrl from the req, add an
helper to get the subsystem associated with the nvmet_req() instead
of open coding the chain of structures.

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-02-10 16:38:05 +01:00
Chaitanya Kulkarni d86481e924 nvmet: use min of device_path and disk len
In function __assign_req_name() instead of using the DEVICE_NAME_LEN in
strncpy() use min of DISK_NAME_LEN and strlen(req->ns->device_path).

This is needed to turn off the following warnings:-

In file included from drivers/nvme/target/core.c:14:
In function ‘__assign_req_name’,
    inlined from ‘trace_event_raw_event_nvmet_req_init’ at drivers/nvme/target/./trace.h:58:1:
drivers/nvme/target/trace.h:52:3: warning: ‘strncpy’ specified bound 32 equals destination size [-Wstringop-truncation]
   strncpy(name, req->ns->device_path, DISK_NAME_LEN);
   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In function ‘__assign_req_name’,
    inlined from ‘perf_trace_nvmet_req_complete’ at drivers/nvme/target/./trace.h💯1:
drivers/nvme/target/trace.h:52:3: warning: ‘strncpy’ specified bound 32 equals destination size [-Wstringop-truncation]
   strncpy(name, req->ns->device_path, DISK_NAME_LEN);
   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In function ‘__assign_req_name’,
    inlined from ‘perf_trace_nvmet_req_init’ at drivers/nvme/target/./trace.h:58:1:
drivers/nvme/target/trace.h:52:3: warning: ‘strncpy’ specified bound 32 equals destination size [-Wstringop-truncation]
   strncpy(name, req->ns->device_path, DISK_NAME_LEN);
   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In function ‘__assign_req_name’,
    inlined from ‘trace_event_raw_event_nvmet_req_complete’ at drivers/nvme/target/./trace.h💯1:
drivers/nvme/target/trace.h:52:3: warning: ‘strncpy’ specified bound 32 equals destination size [-Wstringop-truncation]
   strncpy(name, req->ns->device_path, DISK_NAME_LEN);
   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-02-10 16:38:05 +01:00
Chaitanya Kulkarni 07116ea50f nvmet: use invalid cmd opcode helper
In the NVMeOF block device backend, file backend, and passthru backend
we reject and report the commands if opcode is not handled.

Use the previously introduced helper in the passthru backend to make the
error message uniform.

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-02-10 16:38:05 +01:00
Chaitanya Kulkarni 1c2c761368 nvmet: use invalid cmd opcode helper
In the NVMeOF block device backend, file backend, and passthru backend
we reject and report the commands if opcode is not handled.

Use the previously introduced helper in file backend to reduce the
duplicate code and make the error message uniform.

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-02-10 16:38:05 +01:00
Chaitanya Kulkarni d81d57cf1b nvmet: add helper to report invalid opcode
In the NVMeOF block device backend, file backend, and passthru backend
we reject and report the commands if opcode is not handled.

Add an helper and use it in block device backend to keep the code
and error message uniform.

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-02-10 16:38:05 +01:00
Chaitanya Kulkarni 3999434b6c nvmet: remove extra variable in id-ns handler
In nvmet_execute_identify_ns() local variable ctrl is accessed only in
one place, remove that and directly use it from nvmet_req->sq->ctrl.

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-02-10 16:38:04 +01:00
Chaitanya Kulkarni 3a1f7c79ae nvmet: make nvmet_find_namespace() req based
The six callers of nvmet_find_namespace() duplicate the error log page
update and status setting code for each call on failure.

All callers are nvmet requests based functions, so we can pass req
to the nvmet_find_namesapce() & derive ctrl from req, that'll allow us
to update the error log page in nvmet_find_namespace(). Now that we
pass the request we can also get rid of the local variable in
nvmet_find_namespace() and use the req->ns and return the error code.

Replace the ctrl parameter with nvmet_req for nvmet_find_namespace(),
centralize the error log page update for non allocated namesapces, and
return uniform error for non-allocated namespace.

The nvmet_find_namespace() takes nsid parameter which is from NVMe
commands structures such as get_log_page, identify, rw and common. All
these commands have same offset for the nsid field.

Derive nsid from req->cmd->common.nsid) & remove the extra parameter
from the nvmet_find_namespace().

Lastly now we associate the ns to the req parameter that we pass to the
nvmet_find_namespace(), rename nvmet_find_namespace() to
nvmet_req_find_ns().

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-02-10 16:38:04 +01:00
Chaitanya Kulkarni aa0aff604a nvmet: return uniform error for invalid ns
For nvmet_find_namespace() error case we have inconsistent error code
mapping in the function nvmet_get_smart_log_nsid() and
nvmet_set_feat_write_protect().

There is no point in retrying for the invalid namesapce from the host
side. Set the error code to the NVME_SC_INVALID_NS | NVME_SC_DNR which
matches what we have in nvmet_execute_identify_desclist().

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-02-10 16:38:04 +01:00
Chaitanya Kulkarni 40244ad36b nvmet: set status to 0 in case for invalid nsid
For unallocated namespace in nvmet_execute_identify_ns() don't set the
status to NVME_SC_INVALID_NS, set it to zero.

Fixes: bffcd50778 ("nvmet: set right status on error in id-ns handler")
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-02-10 16:38:04 +01:00
Christoph Hellwig b5df8e79a2 nvmet-fc: add a missing __rcu annotation to nvmet_fc_tgt_assoc.queues
Make sparse happy after the recent conversion to RCU lookups.

Fixes: 4e2f02bf77 ("nvmet-fc: use RCU proctection for assoc_list")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: James Smart <james.smart@broadcom.com>
2021-02-10 16:38:04 +01:00
Keith Busch 73a1a2298f nvme-multipath: set nr_zones for zoned namespaces
The bio based drivers only require the request_queue's nr_zones is set,
so set this field in the head if the namespace path is zoned.

Fixes: 240e6ee272 ("nvme: support for zoned namespaces")
Reported-by: Minwoo Im <minwoo.im.dev@gmail.com>
Cc: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-02-10 16:38:04 +01:00
Sagi Grimberg 0fbcfb089a nvmet-tcp: fix potential race of tcp socket closing accept_work
When we accept a TCP connection and allocate an nvmet-tcp queue we should
make sure not to fully establish it or reference it as the connection may
be already closing, which triggers queue release work, which does not
fence against queue establishment.

In order to address such a race, we make sure to check the sk_state and
contain the queue reference to be done underneath the sk_callback_lock
such that the queue release work correctly fences against it.

Fixes: 872d26a391 ("nvmet-tcp: add NVMe over TCP target driver")
Reported-by: Elad Grupi <elad.grupi@dell.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-02-10 16:38:03 +01:00
Sagi Grimberg fda871c0ba nvmet-tcp: fix receive data digest calculation for multiple h2cdata PDUs
When a host sends multiple h2cdata PDUs for a single command, we
should verify the data digest calculation per PDU and not
per command.

Fixes: 872d26a391 ("nvmet-tcp: add NVMe over TCP target driver")
Reported-by: Narayan Ayalasomayajula <Narayan.Ayalasomayajula@wdc.com>
Tested-by: Narayan Ayalasomayajula <Narayan.Ayalasomayajula@wdc.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-02-10 16:38:03 +01:00
Chao Leng 62eca39722 nvme-rdma: handle nvme_rdma_post_send failures better
nvme_rdma_post_send failing is a path related error and should bounce
to another path when using nvme-multipath.  Call nvme_host_path_error
when nvme_rdma_post_send returns -EIO to ensure nvme_complete_rq gets
invoked to fail over to another path if there is one.

Signed-off-by: Chao Leng <lengchao@huawei.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-02-10 16:38:03 +01:00
Chao Leng ea5e5f42cd nvme-fabrics: avoid double completions in nvmf_fail_nonready_command
When reconnecting, the request may be completed with
NVME_SC_HOST_PATH_ERROR in nvmf_fail_nonready_command, which currently
set the state of the request to MQ_RQ_IN_FLIGHT before calling
nvme_complete_rq.  When this happens for a request that is freed by
the caller, such as nvme_submit_user_cmd, in the worst case the request
could be completed again in tear down process.

Instead of calling blk_mq_start_request from nvmf_fail_nonready_command,
just use the new nvme_host_path_error helper to complete the command
without starting it.

Signed-off-by: Chao Leng <lengchao@huawei.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-02-10 16:38:03 +01:00
Chao Leng dda3248e7f nvme: introduce a nvme_host_path_error helper
When using nvme native multipathing, if a path related error occurs
during ->queue_rq, the request needs to be completed with
NVME_SC_HOST_PATH_ERROR so that the request can be failed over.

Introduce a helper to complete the command from ->queue_rq in a wait
that invokes nvme_complete_rq.

Signed-off-by: Chao Leng <lengchao@huawei.com>
[hch: renamed, added a return value to clean up the callers a bit]
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-02-10 16:38:03 +01:00
Jiapeng Chong f720a8edbc nvme: convert sysfs sprintf/snprintf family to sysfs_emit
Fix the following coccicheck warning:

./drivers/nvme/host/core.c:3580:8-16: WARNING: use scnprintf or sprintf.
./drivers/nvme/host/core.c:3570:8-16: WARNING: use scnprintf or sprintf.
./drivers/nvme/host/core.c:3560:8-16: WARNING: use scnprintf or sprintf.
./drivers/nvme/host/core.c:3526:8-16: WARNING: use scnprintf or sprintf.
./drivers/nvme/host/core.c:2833:8-16: WARNING: use scnprintf or sprintf.

Reported-by: Abaci Robot<abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-02-10 16:38:02 +01:00
Damien Le Moal 73d90386b5 nvme: cleanup zone information initialization
For a zoned namespace, in nvme_update_ns_info(), call
nvme_update_zone_info() after executing nvme_update_disk_info() so that
the namespace queue logical and physical block size limits are set.
This allows setting the namespace queue max_zone_append_sectors limit
in nvme_update_zone_info() instead of nvme_revalidate_zones(),
simplifying this function. Also use blk_queue_set_zoned() to set the
namespace zoned model.

Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@edc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-02-10 07:44:40 -07:00
Sagi Grimberg cb8563f5c7 nvmet-tcp: fix out-of-bounds access when receiving multiple h2cdata PDUs
When the host sends multiple h2cdata PDUs, we keep track on
the receive progress and calculate the scatterlist index and
offsets.

The issue is that sg_offset should only be kept for the first
iov entry we map in the iovec as this is the difference between
our cursor and the sg entry offset itself.

In addition, the sg index was calculated wrong because we should
not round up when dividing the command byte offset with PAG_SIZE.

Fixes: 872d26a391 ("nvmet-tcp: add NVMe over TCP target driver")
Reported-by: Narayan Ayalasomayajula <Narayan.Ayalasomayajula@wdc.com>
Tested-by: Narayan Ayalasomayajula <Narayan.Ayalasomayajula@wdc.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-02-03 16:57:36 +01:00
Claus Stovgaard c9e95c3928 nvme-pci: ignore the subsysem NQN on Phison E16
Tested both with Corsairs firmware 11.3 and 13.0 for the Corsairs MP600
and both have the issue as reported by the kernel.

nvme nvme0: missing or invalid SUBNQN field.

Signed-off-by: Claus Stovgaard <claus.stovgaard@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-02-02 10:48:37 +01:00
Thorsten Leemhuis 538e4a8c57 nvme-pci: avoid the deepest sleep state on Kingston A2000 SSDs
Some Kingston A2000 NVMe SSDs sooner or later get confused and stop
working when they use the deepest APST sleep while running Linux. The
system then crashes and one has to cold boot it to get the SSD working
again.

Kingston seems to known about this since at least mid-September 2020:
https://bbs.archlinux.org/viewtopic.php?pid=1926994#p1926994

Someone working for a German company representing Kingston to the German
press confirmed to me Kingston engineering is aware of the issue and
investigating; the person stated that to their current knowledge only
the deepest APST sleep state causes trouble. Therefore, make Linux avoid
it for now by applying the NVME_QUIRK_NO_DEEPEST_PS to this SSD.

I have two such SSDs, but it seems the problem doesn't occur with them.
I hence couldn't verify if this patch really fixes the problem, but all
the data in front of me suggests it should.

This patch can easily be reverted or improved upon if a better solution
surfaces.

FWIW, there are many reports about the issue scattered around the web;
most of the users disabled APST completely to make things work, some
just made Linux avoid the deepest sleep state:

https://bugzilla.kernel.org/show_bug.cgi?id=195039#c65
https://bugzilla.kernel.org/show_bug.cgi?id=195039#c73
https://bugzilla.kernel.org/show_bug.cgi?id=195039#c74
https://bugzilla.kernel.org/show_bug.cgi?id=195039#c78
https://bugzilla.kernel.org/show_bug.cgi?id=195039#c79
https://bugzilla.kernel.org/show_bug.cgi?id=195039#c80
https://askubuntu.com/questions/1222049/nvmekingston-a2000-sometimes-stops-giving-response-in-ubuntu-18-04dell-inspir
https://community.acer.com/en/discussion/604326/m-2-nvme-ssd-aspire-517-51g-issue-compatibility-kingston-a2000-linux-ubuntu

For the record, some data from 'nvme id-ctrl /dev/nvme0'

NVME Identify Controller:
vid       : 0x2646
ssvid     : 0x2646
mn        : KINGSTON SA2000M81000G
fr        : S5Z42105
[...]
ps    0 : mp:9.00W operational enlat:0 exlat:0 rrt:0 rrl:0
          rwt:0 rwl:0 idle_power:- active_power:-
ps    1 : mp:4.60W operational enlat:0 exlat:0 rrt:1 rrl:1
          rwt:1 rwl:1 idle_power:- active_power:-
ps    2 : mp:3.80W operational enlat:0 exlat:0 rrt:2 rrl:2
          rwt:2 rwl:2 idle_power:- active_power:-
ps    3 : mp:0.0450W non-operational enlat:2000 exlat:2000 rrt:3 rrl:3
          rwt:3 rwl:3 idle_power:- active_power:-
ps    4 : mp:0.0040W non-operational enlat:15000 exlat:15000 rrt:4 rrl:4
          rwt:4 rwl:4 idle_power:- active_power:-

Cc: stable@vger.kernel.org # 4.14+
Signed-off-by: Thorsten Leemhuis <linux@leemhuis.info>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-02-02 10:46:17 +01:00
Chao Leng 563c81586d nvme-tcp: use cancel tagset helper for tear down
Use nvme_cancel_tagset and nvme_cancel_admin_tagset to clean code for
tear down process.

Signed-off-by: Chao Leng <lengchao@huawei.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-02-02 10:26:13 +01:00
Chao Leng c4189d680e nvme-rdma: use cancel tagset helper for tear down
Use nvme_cancel_tagset and nvme_cancel_admin_tagset to clean code for
tear down process.

Signed-off-by: Chao Leng <lengchao@huawei.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-02-02 10:26:12 +01:00
Chao Leng 70a99574a7 nvme-tcp: add clean action for failed reconnection
If reconnect failed after start io queues, the queues will be unquiesced
and new requests continue to be delivered. Reconnection error handling
process directly free queues without cancel suspend requests. The
suppend request will time out, and then crash due to use the queue
after free.

Add sync queues and cancel suppend requests for reconnection error
handling.

Signed-off-by: Chao Leng <lengchao@huawei.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-02-02 10:26:12 +01:00
Chao Leng 958dc1d32c nvme-rdma: add clean action for failed reconnection
A crash happens when inject failed reconnection.
If reconnect failed after start io queues, the queues will be unquiesced
and new requests continue to be delivered. Reconnection error handling
process directly free queues without cancel suspend requests. The
suppend request will time out, and then crash due to use the queue
after free.

Add sync queues and cancel suppend requests for reconnection error
handling.

Signed-off-by: Chao Leng <lengchao@huawei.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-02-02 10:26:12 +01:00
Chao Leng 2547906982 nvme-core: add cancel tagset helpers
Add nvme_cancel_tagset and nvme_cancel_admin_tagset for tear down and
reconnection error handling.

Signed-off-by: Chao Leng <lengchao@huawei.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-02-02 10:26:12 +01:00
Chaitanya Kulkarni 8f8ea928fd nvme-core: get rid of the extra space
Remove the extra space in the nvme_free_cels() when calling
xa_for_each loop which is not a common practice
(except drivers/infiniband/core/ not sure why).

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-02-02 10:26:12 +01:00
Johannes Thumshirn 4a407d5ebc nvme: add tracing of zns commands
When support for the NVMe ZNS commands was merged, tracing of these has
been omitted.

Add nvme_cmd_zone_mgmt_send, nvme_cmd_zone_mgmt_recv as well as
nvme_cmd_zone_append to the nvme driver's tracing facility.

Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-02-02 10:26:12 +01:00
Michal Krakowiak 3a98c51a24 nvme: parse format nvm command details when tracing
Add detailed parsing of format nvm admin command to make the
trace log more consistent and human-readable.

Signed-off-by: Michal Krakowiak <michal.krakowiak@intel.com>
Acked-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Minwoo Im <minwoo.im.dev@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-02-02 10:26:12 +01:00
Chaitanya Kulkarni 193fcf371f nvmet: add lba to sect conversion helpers
In this preparation patch, we add helpers to convert lbas to sectors &
sectors to lba. This is needed to eliminate code duplication in the ZBD
backend.

Use these helpers in the block device backend.

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-02-02 10:26:11 +01:00
Chaitanya Kulkarni 3c7b224f19 nvmet: remove extra variable in identify ns
We remove the extra local variable struct nvmet_ns in
nvmet_execute_identify_ns() since req already has ns member that can be
reused, this also eliminates the explicit call to nvmet_put_namespace()
which is already present in the request completion path.

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-02-02 10:26:11 +01:00
Chaitanya Kulkarni 3631c7f4a2 nvmet: remove extra variable in id-desclist
We remove the extra local variable struct nvmet_ns in
nvmet_execute_identify_desclist() since req already has ns member that
can be reused, this also eliminates the explicit call to
nvmet_put_namespace() which is already present in the request
completion path.

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-02-02 10:26:11 +01:00
Chaitanya Kulkarni 624e67fdf9 nvmet: remove extra variable in smart log nsid
We remove the extra local variable struct nvmet_ns in
nvmet_get_smart_log_nsid() since req already has ns member that can be
reused, this also eliminates the explicit call to nvmet_put_namespace()
which is already present in the request completion path.

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-02-02 10:26:11 +01:00
Minwoo Im fc97e942d9 nvme: refactor ns->ctrl by request
Just for current code in nvme_cleanup_cmd(), we don't have to get
namespace instance, but we need controller instance.

Controller instance can be retrieved by namespace instance, but it can
be directly accessed by nvme_request instance from request.

	ctrl = nvme_req(req)->ctrl;

We don't have to go around namespace instance from request instance
through gendisk.

Signed-off-by: Minwoo Im <minwoo.im.dev@gmail.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-02-02 10:26:11 +01:00
Sagi Grimberg 0dc9edaf80 nvme-tcp: pass multipage bvec to request iov_iter
iov_iter uses the right helpers so we should be able
to pass in a multipage bvec. Right now the iov_iter is
initialized with more segments that it needs which doesn't
fail because the iov_iter is capped by byte count, but it
is better to use a full multipage bvec iter.

Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-02-02 10:26:11 +01:00
Sagi Grimberg 60141aa08c nvme-tcp: get rid of unused helper function
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-02-02 10:26:11 +01:00
Sagi Grimberg cb9b870fba nvme-tcp: fix wrong setting of request iov_iter
We might set the iov_iter direction wrong, which is harmless for this
use-case, but get it right. Also this makes the code slightly cleaner.

Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-02-02 10:26:11 +01:00
Minwoo Im f9063a5327 nvme: support command retry delay for admin command
The controller can request a delay retrying a failed command by setting
the Command Retry Delay (CRD) field in the Completion Queue Entry.

Currentlty this features is only applied to commands on the I/O queue, but
not to commands on the admin queue.  Retreive the nvme_ctrl from the
request so that no namespace is required and apply the feature to all
commands.

Signed-off-by: Minwoo Im <minwoo.im.dev@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-02-02 10:26:10 +01:00
Rikard Falkeborn 60b152a508 nvme: constify static attribute_group structs
The only usage of these is to put their addresses in arrays of pointers
to const attribute_groups. Make them const to allow the compiler to put
them in read-only memory.

Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-02-02 10:26:10 +01:00
Leonid Ravich 4e2f02bf77 nvmet-fc: use RCU proctection for assoc_list
searching assoc_list protected by rcu_read_lock if list not changed inline.
and according to the rcu list rules.

queue array embedded into nvmet_fc_tgt_assoc protected by rcu_read_lock
according to rcu dereference/assign rules.

queue and assoc object freed after grace period by call_rcu.

tgtport lock taken for changing assoc_list.

Reviewed-by: Eldad Zinger <Eldad.Zinger@dell.com>
Reviewed-by: Elad Grupi <Elad.Grupi@dell.com>
Reviewed-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Leonid Ravich <Leonid.Ravich@emc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-02-02 10:26:10 +01:00
Israel Rukshin 36ca03c830 nvmet: Fix nvmet_is_port_enabled indentation
Remove extra tab.

Signed-off-by: Israel Rukshin <israelr@nvidia.com>
Reviewed-by: Max Gurtovoy <mgurtovoy@nvidia.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-02-02 10:26:10 +01:00
Israel Rukshin cc34562261 nvmet: Use nvmet_is_port_enabled helper for pi_enable
Remove code duplication.

Signed-off-by: Israel Rukshin <israelr@nvidia.com>
Reviewed-by: Max Gurtovoy <mgurtovoy@nvidia.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-02-02 10:26:10 +01:00
Chao Leng 772ea326a4 nvme-core: use list_add_tail_rcu instead of list_add_tail for nvme_init_ns_head
The "list" of nvme_ns_head is used as rcu list, now in nvme_init_ns_head
list_add_tail is used to add ns->siblings to the rcu list. It is not safe.
Should use list_add_tail_rcu instead of list_add_tail.

Signed-off-by: Chao Leng <lengchao@huawei.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-01-28 19:25:07 +01:00
Daniel Wagner d1bcf006a9 nvme-multipath: Early exit if no path is available
nvme_round_robin_path() should test if the return ns pointer is valid.
nvme_next_ns() will return a NULL pointer if there is no path left.

Fixes: 75c10e7327 ("nvme-multipath: round-robin I/O policy")
Signed-off-by: Daniel Wagner <dwagner@suse.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-01-28 19:25:07 +01:00
Chaitanya Kulkarni 899199292b nvme-pci: add the DISABLE_WRITE_ZEROES quirk for a SPCC device
This adds a quirk for SPCC 256GB NVMe 1.3 drive which fixes timeouts and
I/O errors due to the fact that the controller does not properly
handle the Write Zeroes command:

[ 2745.659527] CPU: 2 PID: 0 Comm: swapper/2 Tainted: G            E 5.10.6-BET #1
[ 2745.659528] Hardware name: System manufacturer System Product Name/PRIME X570-P, BIOS 3001 12/04/2020
[ 2776.138874] nvme nvme1: I/O 414 QID 3 timeout, aborting
[ 2776.138886] nvme nvme1: I/O 415 QID 3 timeout, aborting
[ 2776.138891] nvme nvme1: I/O 416 QID 3 timeout, aborting
[ 2776.138895] nvme nvme1: I/O 417 QID 3 timeout, aborting
[ 2776.138912] nvme nvme1: Abort status: 0x0
[ 2776.138921] nvme nvme1: I/O 428 QID 3 timeout, aborting
[ 2776.138922] nvme nvme1: Abort status: 0x0
[ 2776.138925] nvme nvme1: Abort status: 0x0
[ 2776.138974] nvme nvme1: Abort status: 0x0
[ 2776.138977] nvme nvme1: Abort status: 0x0
[ 2806.346792] nvme nvme1: I/O 414 QID 3 timeout, reset controller
[ 2806.363566] nvme nvme1: 15/0/0 default/read/poll queues
[ 2836.554298] nvme nvme1: I/O 415 QID 3 timeout, disable controller
[ 2836.672064] blk_update_request: I/O error, dev nvme1n1, sector 16350 op 0x9:(WRITE_ZEROES) flags 0x0 phys_seg 0 prio class 0
[ 2836.672072] blk_update_request: I/O error, dev nvme1n1, sector 16093 op 0x9:(WRITE_ZEROES) flags 0x0 phys_seg 0 prio class 0
[ 2836.672074] blk_update_request: I/O error, dev nvme1n1, sector 15836 op 0x9:(WRITE_ZEROES) flags 0x0 phys_seg 0 prio class 0
[ 2836.672076] blk_update_request: I/O error, dev nvme1n1, sector 15579 op 0x9:(WRITE_ZEROES) flags 0x0 phys_seg 0 prio class 0
[ 2836.672078] blk_update_request: I/O error, dev nvme1n1, sector 15322 op 0x9:(WRITE_ZEROES) flags 0x0 phys_seg 0 prio class 0
[ 2836.672080] blk_update_request: I/O error, dev nvme1n1, sector 15065 op 0x9:(WRITE_ZEROES) flags 0x0 phys_seg 0 prio class 0
[ 2836.672082] blk_update_request: I/O error, dev nvme1n1, sector 14808 op 0x9:(WRITE_ZEROES) flags 0x0 phys_seg 0 prio class 0
[ 2836.672083] blk_update_request: I/O error, dev nvme1n1, sector 14551 op 0x9:(WRITE_ZEROES) flags 0x0 phys_seg 0 prio class 0
[ 2836.672085] blk_update_request: I/O error, dev nvme1n1, sector 14294 op 0x9:(WRITE_ZEROES) flags 0x0 phys_seg 0 prio class 0
[ 2836.672087] blk_update_request: I/O error, dev nvme1n1, sector 14037 op 0x9:(WRITE_ZEROES) flags 0x0 phys_seg 0 prio class 0
[ 2836.672121] nvme nvme1: failed to mark controller live state
[ 2836.672123] nvme nvme1: Removing after probe failure status: -19
[ 2836.689016] Aborting journal on device dm-0-8.
[ 2836.689024] Buffer I/O error on dev dm-0, logical block 25198592, lost sync page write
[ 2836.689027] JBD2: Error -5 detected when updating journal superblock for dm-0-8.

Reported-by: Bradley Chapman <chapman6235@comcast.net>
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Tested-by: Bradley Chapman <chapman6235@comcast.net>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-01-28 19:25:07 +01:00
Chaitanya Kulkarni 59c157433f nvme-core: check bdev value for NULL
The nvme-core sets the bdev to NULL when admin comamnd is issued from
IOCTL in the following path e.g. nvme list :-

block_ioctl()
 blkdev_ioctl()
  nvme_ioctl()
   nvme_user_cmd()
    nvme_submit_user_cmd()

The commit 309dca309f ("block: store a block_device pointer in struct bio")
now uses bdev unconditionally in the macro bio_set_dev() and assumes
that bdev value is not NULL which results in the following crash in
since thats where bdev is actually accessed :-

void bio_associate_blkg_from_css(struct bio *bio,
				 struct cgroup_subsys_state *css)
{
	if (bio->bi_blkg)
		blkg_put(bio->bi_blkg);

	if (css && css->parent) {
		bio->bi_blkg = blkg_tryget_closest(bio, css);
	} else {
-------------->	blkg_get(bio->bi_bdev->bd_disk->queue->root_blkg);
		bio->bi_blkg = bio->bi_bdev->bd_disk->queue->root_blkg;
	}
}
EXPORT_SYMBOL_GPL(bio_associate_blkg_from_css);

[  345.385947] BUG: kernel NULL pointer dereference, address: 0000000000000690
[  345.387103] #PF: supervisor read access in kernel mode
[  345.387894] #PF: error_code(0x0000) - not-present page
[  345.388756] PGD 162a2b067 P4D 162a2b067 PUD 1633eb067 PMD 0
[  345.389625] Oops: 0000 [#1] SMP NOPTI
[  345.390206] CPU: 15 PID: 4100 Comm: nvme Tainted: G           OE     5.11.0-rc5blk+ #141
[  345.391377] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.0-59-gc9ba52764
[  345.393074] RIP: 0010:bio_associate_blkg_from_css.cold.47+0x58/0x21f

[  345.396362] RSP: 0018:ffffc90000dbbce8 EFLAGS: 00010246
[  345.397078] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000027
[  345.398114] RDX: 0000000000000000 RSI: ffff888813be91f0 RDI: ffff888813be91f8
[  345.399039] RBP: ffffc90000dbbd30 R08: 0000000000000001 R09: 0000000000000001
[  345.399950] R10: 0000000064c66670 R11: 00000000ef955201 R12: ffff888812d32800
[  345.401031] R13: 0000000000000000 R14: ffff888113e51540 R15: ffff888113e51540
[  345.401976] FS:  00007f3747f1d780(0000) GS:ffff888813a00000(0000) knlGS:0000000000000000
[  345.402997] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  345.403737] CR2: 0000000000000690 CR3: 000000081a4bc000 CR4: 00000000003506e0
[  345.404685] Call Trace:
[  345.405031]  bio_associate_blkg+0x71/0x1c0
[  345.405649]  nvme_submit_user_cmd+0x1aa/0x38e [nvme_core]
[  345.406348]  nvme_user_cmd.isra.73.cold.98+0x54/0x92 [nvme_core]
[  345.407117]  nvme_ioctl+0x226/0x260 [nvme_core]
[  345.407707]  blkdev_ioctl+0x1c8/0x2b0
[  345.408183]  block_ioctl+0x3f/0x50
[  345.408627]  __x64_sys_ioctl+0x84/0xc0
[  345.409117]  do_syscall_64+0x33/0x40
[  345.409592]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[  345.410233] RIP: 0033:0x7f3747632107

[  345.413125] RSP: 002b:00007ffe461b6648 EFLAGS: 00000206 ORIG_RAX: 0000000000000010
[  345.414086] RAX: ffffffffffffffda RBX: 00000000007b7fd0 RCX: 00007f3747632107
[  345.414998] RDX: 00007ffe461b6650 RSI: 00000000c0484e41 RDI: 0000000000000004
[  345.415966] RBP: 0000000000000004 R08: 00000000007b7fe8 R09: 00000000007b9080
[  345.416883] R10: 00007ffe461b62c0 R11: 0000000000000206 R12: 00000000007b7fd0
[  345.417808] R13: 0000000000000000 R14: 0000000000000003 R15: 0000000000000000

Add a NULL check before we set the bdev for bio.

This issue is found on block/for-next tree.

Fixes: 309dca309f ("block: store a block_device pointer in struct bio")
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-01-27 10:10:15 -07:00
Christoph Hellwig c6bf3f0e25 block: use an on-stack bio in blkdev_issue_flush
There is no point in allocating memory for a synchronous flush.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Acked-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-01-27 09:51:48 -07:00
Christoph Hellwig a7c7f7b2b6 nvme: use bio_set_dev to assign ->bi_bdev
Always use the bio_set_dev helper to assign ->bi_bdev to make sure
other state related to the device is uptodate.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-01-26 08:50:01 -07:00
Guoqing Jiang 684da7628d block: remove unnecessary argument from blk_execute_rq
We can remove 'q' from blk_execute_rq as well after the previous change
in blk_execute_rq_nowait.

And more importantly it never really was needed to start with given
that we can trivial derive it from struct request.

Cc: linux-scsi@vger.kernel.org
Cc: virtualization@lists.linux-foundation.org
Cc: linux-ide@vger.kernel.org
Cc: linux-mmc@vger.kernel.org
Cc: linux-nvme@lists.infradead.org
Cc: linux-nfs@vger.kernel.org
Acked-by: Ulf Hansson <ulf.hansson@linaro.org> # for mmc
Signed-off-by: Guoqing Jiang <guoqing.jiang@cloud.ionos.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-01-24 21:52:39 -07:00
Guoqing Jiang 8eeed0b554 block: remove unnecessary argument from blk_execute_rq_nowait
The 'q' is not used since commit a1ce35fa49 ("block: remove dead
elevator code"), also update the comment of the function.

And more importantly it never really was needed to start with given
that we can trivial derive it from struct request.

Cc: target-devel@vger.kernel.org
Cc: linux-scsi@vger.kernel.org
Cc: virtualization@lists.linux-foundation.org
Cc: linux-ide@vger.kernel.org
Cc: linux-mmc@vger.kernel.org
Cc: linux-nvme@lists.infradead.org
Cc: linux-nfs@vger.kernel.org
Signed-off-by: Guoqing Jiang <guoqing.jiang@cloud.ionos.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-01-24 21:52:39 -07:00
Christoph Hellwig 309dca309f block: store a block_device pointer in struct bio
Replace the gendisk pointer in struct bio with a pointer to the newly
improved struct block device.  From that the gendisk can be trivially
accessed with an extra indirection, but it also allows to directly
look up all information related to partition remapping.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-01-24 18:17:20 -07:00
Christoph Hellwig d11cd28998 nvme: allow revalidate to set a namespace read-only
Unconditionally call set_disk_ro now that it only updates the hardware
state.  This allows to properly set up the Linux devices read-only when
the controller turns a previously writable namespace read-only.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-01-24 18:15:57 -07:00
Christoph Hellwig fa0732168f nvme-pci: fix error unwind in nvme_map_data
Properly unwind step by step using refactored helpers from nvme_unmap_data
to avoid a potential double dma_unmap on a mapping failure.

Fixes: 7fe07d14f7 ("nvme-pci: merge nvme_free_iod into nvme_unmap_data")
Reported-by: Marc Orr <marcorr@google.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Marc Orr <marcorr@google.com>
2021-01-20 18:56:33 +01:00
Christoph Hellwig 9275c206f8 nvme-pci: refactor nvme_unmap_data
Split out three helpers from nvme_unmap_data that will allow finer grained
unwinding from nvme_map_data.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Marc Orr <marcorr@google.com>
2021-01-20 18:56:26 +01:00
Chaitanya Kulkarni bffcd50778 nvmet: set right status on error in id-ns handler
The function nvmet_execute_identify_ns() doesn't set the status if call
to nvmet_find_namespace() fails. In that case we set the status of the
request to the value return by the nvmet_copy_sgl().

Set the status to NVME_SC_INVALID_NS and adjust the code such that
request will have the right status on nvmet_find_namespace() failure.

Without this patch :-
NVME Identify Namespace 3:
nsze    : 0
ncap    : 0
nuse    : 0
nsfeat  : 0
nlbaf   : 0
flbas   : 0
mc      : 0
dpc     : 0
dps     : 0
nmic    : 0
rescap  : 0
fpi     : 0
dlfeat  : 0
nawun   : 0
nawupf  : 0
nacwu   : 0
nabsn   : 0
nabo    : 0
nabspf  : 0
noiob   : 0
nvmcap  : 0
mssrl   : 0
mcl     : 0
msrc    : 0
nsattr	: 0
nvmsetid: 0
anagrpid: 0
endgid  : 0
nguid   : 00000000000000000000000000000000
eui64   : 0000000000000000
lbaf  0 : ms:0   lbads:0  rp:0 (in use)

With this patch-series :-
feb3b88b501e (HEAD -> nvme-5.11) nvmet: remove extra variable in identify ns
6302aa67210a nvmet: remove extra variable in id-desclist
ed57951da453 nvmet: remove extra variable in smart log nsid
be384b8c24dc nvmet: set right status on error in id-ns handler

NVMe status: INVALID_NS: The namespace or the format of that namespace is invalid(0xb)

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-01-18 18:58:19 +01:00
Klaus Jensen 20d3bb92e8 nvme-pci: allow use of cmb on v1.4 controllers
Since NVMe v1.4 the Controller Memory Buffer must be explicitly enabled
by the host.

Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
[hch: avoid a local variable and add a comment]
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-01-18 18:58:18 +01:00
Chao Leng 9ebbfe495e nvme-tcp: avoid request double completion for concurrent nvme_tcp_timeout
Each name space has a request queue, if complete request long time,
multi request queues may have time out requests at the same time,
nvme_tcp_timeout will execute concurrently. Multi requests in different
request queues may be queued in the same tcp queue, multi
nvme_tcp_timeout may call nvme_tcp_stop_queue at the same time.
The first nvme_tcp_stop_queue will clear NVME_TCP_Q_LIVE and continue
stopping the tcp queue(cancel io_work), but the others check
NVME_TCP_Q_LIVE is already cleared, and then directly complete the
requests, complete request before the io work is completely canceled may
lead to a use-after-free condition.
Add a multex lock to serialize nvme_tcp_stop_queue.

Signed-off-by: Chao Leng <lengchao@huawei.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-01-18 18:58:18 +01:00
Chao Leng 7674073b2e nvme-rdma: avoid request double completion for concurrent nvme_rdma_timeout
A crash happens when inject completing request long time(nearly 30s).
Each name space has a request queue, when inject completing request long
time, multi request queues may have time out requests at the same time,
nvme_rdma_timeout will execute concurrently. Multi requests in different
request queues may be queued in the same rdma queue, multi
nvme_rdma_timeout may call nvme_rdma_stop_queue at the same time.
The first nvme_rdma_timeout will clear NVME_RDMA_Q_LIVE and continue
stopping the rdma queue(drain qp), but the others check NVME_RDMA_Q_LIVE
is already cleared, and then directly complete the requests, complete
request before the qp is fully drained may lead to a use-after-free
condition.

Add a multex lock to serialize nvme_rdma_stop_queue.

Signed-off-by: Chao Leng <lengchao@huawei.com>
Tested-by: Israel Rukshin <israelr@nvidia.com>
Reviewed-by: Israel Rukshin <israelr@nvidia.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-01-18 18:58:18 +01:00
Revanth Rajashekar 4d6b1c95b9 nvme: check the PRINFO bit before deciding the host buffer length
According to NVMe spec v1.4, section 8.3.1, the PRINFO bit and
the metadata size play a vital role in deteriming the host buffer size.

If PRIFNO bit is set and MS==8, the host doesn't add the metadata buffer,
instead the controller adds it.

Signed-off-by: Revanth Rajashekar <revanth.rajashekar@intel.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-01-18 18:58:16 +01:00
Sagi Grimberg 5ab25a32cd nvme: don't intialize hwmon for discovery controllers
Discovery controllers usually don't support smart log page command.
So when we connect to the discovery controller we see this warning:
nvme nvme0: Failed to read smart log (error 24577)
nvme nvme0: new ctrl: NQN "nqn.2014-08.org.nvmexpress.discovery", addr 192.168.123.1:8009
nvme nvme0: Removing ctrl: NQN "nqn.2014-08.org.nvmexpress.discovery"

Introduce a new helper to understand if the controller is a discovery
controller and use this helper to skip nvme_init_hwmon (also use it in
other places that we check if the controller is a discovery controller).

Fixes: 400b6a7b13 ("nvme: Add hardware monitoring support")
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-01-14 20:27:35 +01:00
Sagi Grimberg ca1ff67d0f nvme-tcp: fix possible data corruption with bio merges
When a bio merges, we can get a request that spans multiple
bios, and the overall request payload size is the sum of
all bios. When we calculate how much we need to send
from the existing bio (and bvec), we did not take into
account the iov_iter byte count cap.

Since multipage bvecs support, bvecs can split in the middle
which means that when we account for the last bvec send we
should also take the iov_iter byte count cap as it might be
lower than the last bvec size.

Reported-by: Hao Wang <pkuwangh@gmail.com>
Fixes: 3f2304f8c6 ("nvme-tcp: add NVMe over TCP host driver")
Tested-by: Hao Wang <pkuwangh@gmail.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-01-14 20:27:35 +01:00
Sagi Grimberg ada8317721 nvme-tcp: Fix warning with CONFIG_DEBUG_PREEMPT
We shouldn't call smp_processor_id() in a preemptible
context, but this is advisory at best, so instead
call __smp_processor_id().

Fixes: db5ad6b7f8 ("nvme-tcp: try to send request in queue_rq context")
Reported-by: Or Gerlitz <gerlitz.or@gmail.com>
Reported-by: Yi Zhang <yi.zhang@redhat.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-01-14 20:27:35 +01:00
Israel Rukshin 7a84665619 nvmet-rdma: Fix NULL deref when setting pi_enable and traddr INADDR_ANY
When setting port traddr to INADDR_ANY, the listening cm_id->device
is NULL. The associate IB device is known only when a connect request
event arrives, so checking T10-PI device capability should be done
at this stage.

Fixes: b09160c399 ("nvmet-rdma: add metadata/T10-PI support")
Signed-off-by: Israel Rukshin <israelr@nvidia.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Max Gurtovoy <mgurtovoy@nvidia.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-01-14 20:27:34 +01:00
Max Gurtovoy 2b59787a22 nvme: remove the unused status argument from nvme_trace_bio_complete
The only used argument in this function is the "req".

Signed-off-by: Max Gurtovoy <mgurtovoy@nvidia.com>
Reviewed-by: Minwoo Im <minwoo.im.dev@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-01-06 10:30:37 +01:00
Israel Rukshin 9ceb786353 nvmet-rdma: Fix list_del corruption on queue establishment failure
When a queue is in NVMET_RDMA_Q_CONNECTING state, it may has some
requests at rsp_wait_list. In case a disconnect occurs at this
state, no one will empty this list and will return the requests to
free_rsps list. Normally nvmet_rdma_queue_established() free those
requests after moving the queue to NVMET_RDMA_Q_LIVE state, but in
this case __nvmet_rdma_queue_disconnect() is called before. The
crash happens at nvmet_rdma_free_rsps() when calling
list_del(&rsp->free_list), because the request exists only at
the wait list. To fix the issue, simply clear rsp_wait_list when
destroying the queue.

Signed-off-by: Israel Rukshin <israelr@nvidia.com>
Reviewed-by: Max Gurtovoy <mgurtovoy@nvidia.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-01-06 10:30:37 +01:00
Minwoo Im 9b66fc02be nvme: unexport functions with no external caller
There are no callers for nvme_reset_ctrl_sync() and
nvme_alloc_request_qid() so that we keep the symbols exported.

Unexport those functions, mark them static and update the header file
respectively.

Signed-off-by: Minwoo Im <minwoo.im.dev@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-01-06 10:30:37 +01:00
Lalithambika Krishnakumar 62df80165d nvme: avoid possible double fetch in handling CQE
While handling the completion queue, keep a local copy of the command id
from the DMA-accessible completion entry. This silences a time-of-check
to time-of-use (TOCTOU) warning from KF/x[1], with respect to a
Thunderclap[2] vulnerability analysis. The double-read impact appears
benign.

There may be a theoretical window for @command_id to be used as an
adversary-controlled array-index-value for mounting a speculative
execution attack, but that mitigation is saved for a potential follow-on.
A man-in-the-middle attack on the data payload is out of scope for this
analysis and is hopefully mitigated by filesystem integrity mechanisms.

[1] https://github.com/intel/kernel-fuzzer-for-xen-project
[2] http://thunderclap.io/thunderclap-paper-ndss2019.pdf
Signed-off-by: Lalithambika Krishna Kumar <lalithambika.krishnakumar@intel.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-01-06 10:30:37 +01:00
Sagi Grimberg 5c11f7d9f8 nvme-tcp: Fix possible race of io_work and direct send
We may send a request (with or without its data) from two paths:

  1. From our I/O context nvme_tcp_io_work which is triggered from:
    - queue_rq
    - r2t reception
    - socket data_ready and write_space callbacks
  2. Directly from queue_rq if the send_list is empty (because we want to
     save the context switch associated with scheduling our io_work).

However, given that now we have the send_mutex, we may run into a race
condition where none of these contexts will send the pending payload to
the controller. Both io_work send path and queue_rq send path
opportunistically attempt to acquire the send_mutex however queue_rq only
attempts to send a single request, and if io_work context fails to
acquire the send_mutex it will complete without rescheduling itself.

The race can trigger with the following sequence:

  1. queue_rq sends request (no incapsule data) and blocks
  2. RX path receives r2t - prepares data PDU to send, adds h2cdata PDU
     to the send_list and schedules io_work
  3. io_work triggers and cannot acquire the send_mutex - because of (1),
     ends without self rescheduling
  4. queue_rq completes the send, and completes

==> no context will send the h2cdata - timeout.

Fix this by having queue_rq sending as much as it can from the send_list
such that if it still has any left, its because the socket buffer is
full and the socket write_space callback will trigger, thus guaranteeing
that a context will be scheduled to send the h2cdata PDU.

Fixes: db5ad6b7f8 ("nvme-tcp: try to send request in queue_rq context")
Reported-by: Potnuri Bharat Teja <bharat@chelsio.com>
Reported-by: Samuel Jones <sjones@kalrayinc.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Tested-by: Potnuri Bharat Teja <bharat@chelsio.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-01-06 10:30:36 +01:00
Gopal Tiwari 7ee5c78ca3 nvme-pci: mark Samsung PM1725a as IGNORE_DEV_SUBNQN
A system with more than one of these SSDs will only have one usable.
Hence the kernel fails to detect nvme devices due to duplicate cntlids.

[    6.274554] nvme nvme1: Duplicate cntlid 33 with nvme0, rejecting
[    6.274566] nvme nvme1: Removing after probe failure status: -22

Adding the NVME_QUIRK_IGNORE_DEV_SUBNQN quirk to resolves the issue.

Signed-off-by: Gopal Tiwari <gtiwari@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-01-06 10:30:36 +01:00
James Smart 2b54996b7d nvme-fcloop: Fix sscanf type and list_first_entry_or_null warnings
Kernel robot had the following warnings:

>> fcloop.c:1506:6: warning: %x in format string (no. 1) requires
>> 'unsigned int *' but the argument type is 'signed int *'.
>> [invalidScanfArgType_int]
>>    if (sscanf(buf, "%x:%d:%d", &opcode, &starting, &amount) != 3)
>>        ^

Resolve by changing opcode from and int to an unsigned int

and

>>  fcloop.c:1632:32: warning: Uninitialized variable: lport [uninitvar]
>>     ret = __wait_localport_unreg(lport);
>>                                  ^

>>  fcloop.c:1615:28: warning: Uninitialized variable: nport [uninitvar]
>>     ret = __remoteport_unreg(nport, rport);
>>                              ^

These aren't actual issues as the values are assigned prior to use.
It appears the tool doesn't understand list_first_entry_or_null().
Regardless, quiet the tool by initializing the pointers to NULL at
declaration.

Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-01-06 10:30:36 +01:00
James Smart 19fce0470f nvme-fc: avoid calling _nvme_fc_abort_outstanding_ios from interrupt context
Recent patches changed calling sequences. nvme_fc_abort_outstanding_ios
used to be called from a timeout or work context. Now it is being called
in an io completion context, which can be an interrupt handler.
Unfortunately, the abort outstanding ios routine attempts to stop nvme
queues and nested routines that may try to sleep, which is in conflict
with the interrupt handler.

Correct replacing the direct call with a work element scheduling, and the
abort outstanding ios routine will be called in the work element.

Fixes: 95ced8a2c7 ("nvme-fc: eliminate terminate_io use by nvme_fc_error_recovery")
Signed-off-by: James Smart <james.smart@broadcom.com>
Reported-by: Daniel Wagner <dwagner@suse.de>
Tested-by: Daniel Wagner <dwagner@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-01-06 10:30:36 +01:00
Linus Torvalds 009bd55dfc RDMA 5.11 pull request
A smaller set of patches, nothing stands out as being particularly major
 this cycle:
 
 - Driver bug fixes and updates: bnxt_re, cxgb4, rxe, hns, i40iw, cxgb4,
   mlx4 and mlx5
 
 - Bug fixes and polishing for the new rts ULP
 
 - Cleanup of uverbs checking for allowed driver operations
 
 - Use sysfs_emit all over the place
 
 - Lots of bug fixes and clarity improvements for hns
 
 - hip09 support for hns
 
 - NDR and 50/100Gb signaling rates
 
 - Remove dma_virt_ops and go back to using the IB DMA wrappers
 
 - mlx5 optimizations for contiguous DMA regions
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma

Pull rdma updates from Jason Gunthorpe:
 "A smaller set of patches, nothing stands out as being particularly
  major this cycle. The biggest item would be the new HIP09 HW support
  from HNS, otherwise it was pretty quiet for new work here:

   - Driver bug fixes and updates: bnxt_re, cxgb4, rxe, hns, i40iw,
     cxgb4, mlx4 and mlx5

   - Bug fixes and polishing for the new rts ULP

   - Cleanup of uverbs checking for allowed driver operations

   - Use sysfs_emit all over the place

   - Lots of bug fixes and clarity improvements for hns

   - hip09 support for hns

   - NDR and 50/100Gb signaling rates

   - Remove dma_virt_ops and go back to using the IB DMA wrappers

   - mlx5 optimizations for contiguous DMA regions"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma: (147 commits)
  RDMA/cma: Don't overwrite sgid_attr after device is released
  RDMA/mlx5: Fix MR cache memory leak
  RDMA/rxe: Use acquire/release for memory ordering
  RDMA/hns: Simplify AEQE process for different types of queue
  RDMA/hns: Fix inaccurate prints
  RDMA/hns: Fix incorrect symbol types
  RDMA/hns: Clear redundant variable initialization
  RDMA/hns: Fix coding style issues
  RDMA/hns: Remove unnecessary access right set during INIT2INIT
  RDMA/hns: WARN_ON if get a reserved sl from users
  RDMA/hns: Avoid filling sl in high 3 bits of vlan_id
  RDMA/hns: Do shift on traffic class when using RoCEv2
  RDMA/hns: Normalization the judgment of some features
  RDMA/hns: Limit the length of data copied between kernel and userspace
  RDMA/mlx4: Remove bogus dev_base_lock usage
  RDMA/uverbs: Fix incorrect variable type
  RDMA/core: Do not indicate device ready when device enablement fails
  RDMA/core: Clean up cq pool mechanism
  RDMA/core: Update kernel documentation for ib_create_named_qp()
  MAINTAINERS: SOFT-ROCE: Change Zhu Yanjun's email address
  ...
2020-12-16 13:42:26 -08:00
Linus Torvalds 69f637c335 for-5.11/drivers-2020-12-14
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Merge tag 'for-5.11/drivers-2020-12-14' of git://git.kernel.dk/linux-block

Pull block driver updates from Jens Axboe:
 "Nothing major in here:

   - NVMe pull request from Christoph:
        - nvmet passthrough improvements (Chaitanya Kulkarni)
        - fcloop error injection support (James Smart)
        - read-only support for zoned namespaces without Zone Append
          (Javier González)
        - improve some error message (Minwoo Im)
        - reject I/O to offline fabrics namespaces (Victor Gladkov)
        - PCI queue allocation cleanups (Niklas Schnelle)
        - remove an unused allocation in nvmet (Amit Engel)
        - a Kconfig spelling fix (Colin Ian King)
        - nvme_req_qid simplication (Baolin Wang)

   - MD pull request from Song:
        - Fix race condition in md_ioctl() (Dae R. Jeong)
        - Initialize read_slot properly for raid10 (Kevin Vigor)
        - Code cleanup (Pankaj Gupta)
        - md-cluster resync/reshape fix (Zhao Heming)

   - Move null_blk into its own directory (Damien Le Moal)

   - null_blk zone and discard improvements (Damien Le Moal)

   - bcache race fix (Dongsheng Yang)

   - Set of rnbd fixes/improvements (Gioh Kim, Guoqing Jiang, Jack Wang,
     Lutz Pogrell, Md Haris Iqbal)

   - lightnvm NULL pointer deref fix (tangzhenhao)

   - sr in_interrupt() removal (Sebastian Andrzej Siewior)

   - FC endpoint security support for s390/dasd (Jan Höppner, Sebastian
     Ott, Vineeth Vijayan). From the s390 arch guys, arch bits included
     as it made it easier for them to funnel the feature through the
     block driver tree.

   - Follow up fixes (Colin Ian King)"

* tag 'for-5.11/drivers-2020-12-14' of git://git.kernel.dk/linux-block: (64 commits)
  block: drop dead assignments in loop_init()
  sr: Remove in_interrupt() usage in sr_init_command().
  sr: Switch the sector size back to 2048 if sr_read_sector() changed it.
  cdrom: Reset sector_size back it is not 2048.
  drivers/lightnvm: fix a null-ptr-deref bug in pblk-core.c
  null_blk: Move driver into its own directory
  null_blk: Allow controlling max_hw_sectors limit
  null_blk: discard zones on reset
  null_blk: cleanup discard handling
  null_blk: Improve implicit zone close
  null_blk: improve zone locking
  block: Align max_hw_sectors to logical blocksize
  null_blk: Fail zone append to conventional zones
  null_blk: Fix zone size initialization
  bcache: fix race between setting bdev state to none and new write request direct to backing
  block/rnbd: fix a null pointer dereference on dev->blk_symlink_name
  block/rnbd-clt: Dynamically alloc buffer for pathname & blk_symlink_name
  block/rnbd: call kobject_put in the failure path
  Documentation/ABI/rnbd-srv: add document for force_close
  block/rnbd-srv: close a mapped device from server side.
  ...
2020-12-16 13:09:32 -08:00
Linus Torvalds ac7ac4618c for-5.11/block-2020-12-14
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Merge tag 'for-5.11/block-2020-12-14' of git://git.kernel.dk/linux-block

Pull block updates from Jens Axboe:
 "Another series of killing more code than what is being added, again
  thanks to Christoph's relentless cleanups and tech debt tackling.

  This contains:

   - blk-iocost improvements (Baolin Wang)

   - part0 iostat fix (Jeffle Xu)

   - Disable iopoll for split bios (Jeffle Xu)

   - block tracepoint cleanups (Christoph Hellwig)

   - Merging of struct block_device and hd_struct (Christoph Hellwig)

   - Rework/cleanup of how block device sizes are updated (Christoph
     Hellwig)

   - Simplification of gendisk lookup and removal of block device
     aliasing (Christoph Hellwig)

   - Block device ioctl cleanups (Christoph Hellwig)

   - Removal of bdget()/blkdev_get() as exported API (Christoph Hellwig)

   - Disk change rework, avoid ->revalidate_disk() (Christoph Hellwig)

   - sbitmap improvements (Pavel Begunkov)

   - Hybrid polling fix (Pavel Begunkov)

   - bvec iteration improvements (Pavel Begunkov)

   - Zone revalidation fixes (Damien Le Moal)

   - blk-throttle limit fix (Yu Kuai)

   - Various little fixes"

* tag 'for-5.11/block-2020-12-14' of git://git.kernel.dk/linux-block: (126 commits)
  blk-mq: fix msec comment from micro to milli seconds
  blk-mq: update arg in comment of blk_mq_map_queue
  blk-mq: add helper allocating tagset->tags
  Revert "block: Fix a lockdep complaint triggered by request queue flushing"
  nvme-loop: use blk_mq_hctx_set_fq_lock_class to set loop's lock class
  blk-mq: add new API of blk_mq_hctx_set_fq_lock_class
  block: disable iopoll for split bio
  block: Improve blk_revalidate_disk_zones() checks
  sbitmap: simplify wrap check
  sbitmap: replace CAS with atomic and
  sbitmap: remove swap_lock
  sbitmap: optimise sbitmap_deferred_clear()
  blk-mq: skip hybrid polling if iopoll doesn't spin
  blk-iocost: Factor out the base vrate change into a separate function
  blk-iocost: Factor out the active iocgs' state check into a separate function
  blk-iocost: Move the usage ratio calculation to the correct place
  blk-iocost: Remove unnecessary advance declaration
  blk-iocost: Fix some typos in comments
  blktrace: fix up a kerneldoc comment
  block: remove the request_queue to argument request based tracepoints
  ...
2020-12-16 12:57:51 -08:00
Ming Lei 88c9979334 nvme-loop: use blk_mq_hctx_set_fq_lock_class to set loop's lock class
Set nvme-loop's lock class via blk_mq_hctx_set_fq_lock_class for avoiding
lockdep possible recursive locking, then we can remove the dynamically
allocated lock class for each flush queue, finally we can avoid horrible
SCSI probe delay.

This way may not address situation in which one nvme-loop is backed on
another nvme-loop. However, in reality, people seldom uses this way
for test. Even though someone played in this way, it is just one
recursive locking false positive, no real deadlock issue.

Tested-by: Kashyap Desai <kashyap.desai@broadcom.com>
Reported-by: Qian Cai <cai@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Sumit Saxena <sumit.saxena@broadcom.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Kashyap Desai <kashyap.desai@broadcom.com>
Cc: Bart Van Assche <bvanassche@acm.org>
Cc: Hannes Reinecke <hare@suse.de>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-12-07 20:30:19 -07:00
Christoph Hellwig 1c02fca620 block: remove the request_queue argument to the block_bio_remap tracepoint
The request_queue can trivially be derived from the bio.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-12-04 09:42:00 -07:00
Christoph Hellwig 8446fe9255 block: switch partition lookup to use struct block_device
Use struct block_device to lookup partitions on a disk.  This removes
all usage of struct hd_struct from the I/O path.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Acked-by: Coly Li <colyli@suse.de>			[bcache]
Acked-by: Chao Yu <yuchao0@huawei.com>			[f2fs]
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-12-01 14:53:40 -07:00
Javier González 2f4c9ba23b nvme: export zoned namespaces without Zone Append support read-only
Allow ZNS NVMe SSDs to present a read-only namespace when append is not
supported, instead of rejecting the namespace directly.

This allows (i) the namespace to be used in read-only mode, which is not
a problem as the append command only affects the write path, and (ii) to
use standard management tools such as nvme-cli to choose a different
format or firmware slot that is compatible with the Linux zoned block
device.

Signed-off-by: Javier González <javier.gonz@samsung.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-12-01 20:36:38 +01:00
Javier González ba4fb32056 nvme: rename bdev operations
Remane block device operations in preparation to add char device file
operations.

Signed-off-by: Javier González <javier.gonz@samsung.com>
Reviewed-by: Minwoo Im <minwoo.im.dev@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-12-01 20:36:38 +01:00
Javier González f68abd9cc0 nvme: rename controller base dev_t char device
Rename controller base dev_t char device in preparation for adding a
namespace char device.

Signed-off-by: Javier González <javier.gonz@samsung.com>
Reviewed-by: Minwoo Im <minwoo.im.dev@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-12-01 20:36:38 +01:00
Javier González e1aaf5cacb nvme: remove unnecessary return values
Cleanup unnecessary ret values that are not checked or used in
nvme_alloc_ns().

Signed-off-by: Javier González <javier.gonz@samsung.com>
Reviewed-by: Minwoo Im <minwoo.im.dev@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-12-01 20:36:38 +01:00
Minwoo Im f781f3dd6a nvme: print a warning for when listing active namespaces fails
During the scan_work, an Identify command is issued to figure out which
namespaces are active.  If this command fails, the nvme driver falls back
to scanning namespaces sequentially.  In this situation, we don't see
any warnings and don't even know whether list-ns command has been failed
or not easiliy.

Printa warning when the Identify command executin fail:

[    1.108399] nvme nvme0: Identify NS List failed (status=0x400b)
[    1.109583] nvme0n1: detected capacity change from 0 to 1048576
[    1.112186] nvme nvme0: Identify Descriptors failed (nsid=2, status=0x4002)
[    1.113929] nvme nvme0: Identify Descriptors failed (nsid=3, status=0x4002)
[    1.116537] nvme nvme0: Identify Descriptors failed (nsid=4, status=0x4002)
...

Signed-off-by: Minwoo Im <minwoo.im.dev@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-12-01 20:36:37 +01:00
Minwoo Im aa9d729592 nvme: improve an error message on Identify failure
Add the namespace ID to the error message when the Identify command used
to retrieve the Namespace Identification Descriptor list fails.

This avoids rather useless and duplicative messages like the following:
[    1.321031] nvme nvme0: Identify Descriptors failed (16386)
[    1.321948] nvme nvme0: Identify Descriptors failed (16386)
[    1.322872] nvme nvme0: Identify Descriptors failed (16386)
[    1.323775] nvme nvme0: Identify Descriptors failed (16386)
[    1.324687] nvme nvme0: Identify Descriptors failed (16386)
...

Also, print the nvme status code in hexadecimal rather than decimal
format rather for better readability.

Signed-off-by: Minwoo Im <minwoo.im.dev@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-12-01 20:36:37 +01:00
Victor Gladkov 8c4dfea97f nvme-fabrics: reject I/O to offline device
Commands get stuck while Host NVMe-oF controller is in reconnect state.
The controller enters into reconnect state when it loses connection with
the target.  It tries to reconnect every 10 seconds (default) until
a successful reconnect or until the reconnect time-out is reached.
The default reconnect time out is 10 minutes.

Applications are expecting commands to complete with success or error
within a certain timeout (30 seconds by default).  The NVMe host is
enforcing that timeout while it is connected, but during reconnect the
timeout is not enforced and commands may get stuck for a long period or
even forever.

To fix this long delay due to the default timeout, introduce new
"fast_io_fail_tmo" session parameter.  The timeout is measured in seconds
from the controller reconnect and any command beyond that timeout is
rejected.  The new parameter value may be passed during 'connect'.
The default value of -1 means no timeout (similar to current behavior).

Signed-off-by: Victor Gladkov <victor.gladkov@kioxia.com>
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chao Leng <lengchao@huawei.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-12-01 20:36:37 +01:00
Colin Ian King 9f20599c48 nvmet: fix a spelling mistake "incuding" -> "including" in Kconfig
There is a spelling mistake in the Kconfig help text. Fix it.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-12-01 20:36:37 +01:00
Max Gurtovoy 0068a7b010 nvmet: make sure discovery change log event is protected
Generation counter is protected by nvmet_config_sem. Make sure the
callers that call functions that might change it, are calling it
properly.

Signed-off-by: Max Gurtovoy <mgurtovoy@nvidia.com>
Reviewed-by: Israel Rukshin <israelr@nvidia.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-12-01 20:36:37 +01:00
Amit 6d65aeab7b nvmet: remove unused ctrl->cqs
remove unused cqs from nvmet_ctrl struct
this will reduce the allocated memory.

Signed-off-by: Amit <amit.engel@dell.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-12-01 20:36:36 +01:00
Niklas Schnelle e3aef0950a nvme-pci: don't allocate unused I/O queues
currently the NVME_QUIRK_SHARED_TAGS quirk for Apple devices is handled
during the assignment of nr_io_queues in nvme_setup_io_queues().
This however means that for these devices nvme_max_io_queues() will
actually not return the supported maximum which is confusing and
unexpected and also means that in nvme_probe() we are allocating
for I/O queues that will never be used.
Fix this by moving the quirk handling into nvme_max_io_queues().

Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-12-01 20:36:36 +01:00
Niklas Schnelle ff4e5fbad0 nvme-pci: drop min() from nr_io_queues assignment
in nvme_setup_io_queues() the number of I/O queues is set to either 1 in
case of a quirky Apple device or to the min of nvme_max_io_queues() or
dev->nr_allocated_queues - 1.
This is unnecessarily complicated as dev->nr_allocated_queues is only
assigned once and is nvme_max_io_queues() + 1.

Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-12-01 20:36:36 +01:00
Chaitanya Kulkarni dab3902b19 nvmet: use inline bio for passthru fast path
In nvmet_passthru_execute_cmd() which is a high frequency function
it uses bio_alloc() which leads to memory allocation from the fs pool
for each I/O.

For NVMeoF nvmet_req we already have inline_bvec allocated as a part of
request allocation that can be used with preallocated bio when we
already know the size of request before bio allocation with bio_alloc(),
which we already do.

Introduce a bio member for the nvmet_req passthru anon union. In the
fast path, check if we can get away with inline bvec and bio from
nvmet_req with bio_init() call before actually allocating from the
bio_alloc().

This will be useful to avoid any new memory allocation under high
memory pressure situation and get rid of any extra work of
allocation (bio_alloc()) vs initialization (bio_init()) when
transfer len is < NVMET_MAX_INLINE_DATA_LEN that user can configure at
compile time.

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-12-01 20:36:36 +01:00
Chaitanya Kulkarni a4fe2d3afe nvmet: use blk_rq_bio_prep instead of blk_rq_append_bio
The function blk_rq_append_bio() is a genereric API written for all
types driver (having bounce buffers) and different context (where
request is already having a bio i.e. rq->bio != NULL).

It does mainly three things: calculating the segments, bounce queue and
if req->bio == NULL call blk_rq_bio_prep() or handle low level merge()
case.

The NVMe PCIe and fabrics transports currently does not use queue
bounce mechanism. In order to find this for each request processing
in the passthru blk_rq_append_bio() does extra work in the fast path
for each request.

When I ran I/Os with different block sizes on the passthru controller
I found that we can reuse the req->sg_cnt instead of iterating over the
bvecs to find out nr_segs in blk_rq_append_bio(). This calculation in
blk_rq_append_bio() is a duplication of work given that we have the
value in req->sg_cnt. (correct me here if I'm wrong).

With NVMe passthru request based driver we allocate fresh request each
time, so every call to blk_rq_append_bio() rq->bio will be NULL i.e.
we don't really need the second condition in the blk_rq_append_bio()
and the resulting error condition in the caller of blk_rq_append_bio().

So for NVMeOF passthru driver recalculating the segments, bounce check
and ll_back_merge code is not needed such that we can get away with the
minimal version of the blk_rq_append_bio() which removes the error check
in the fast path along with extra variable in nvmet_passthru_map_sg().

This patch updates the nvmet_passthru_map_sg() such that it does only
appending the bio to the request in the context of the NVMeOF Passthru
driver. Following are perf numbers :-

With current implementation (blk_rq_append_bio()) :-
----------------------------------------------------
+    5.80%     0.02%  kworker/0:2-mm_  [nvmet]  [k] nvmet_passthru_execute_cmd
+    5.44%     0.01%  kworker/0:2-mm_  [nvmet]  [k] nvmet_passthru_execute_cmd
+    4.88%     0.00%  kworker/0:2-mm_  [nvmet]  [k] nvmet_passthru_execute_cmd
+    5.44%     0.01%  kworker/0:2-mm_  [nvmet]  [k] nvmet_passthru_execute_cmd
+    4.86%     0.01%  kworker/0:2-mm_  [nvmet]  [k] nvmet_passthru_execute_cmd
+    5.17%     0.00%  kworker/0:2-eve  [nvmet]  [k] nvmet_passthru_execute_cmd

With this patch using blk_rq_bio_prep() :-
----------------------------------------------------
+    3.14%     0.02%  kworker/0:2-eve  [nvmet]  [k] nvmet_passthru_execute_cmd
+    3.26%     0.01%  kworker/0:2-eve  [nvmet]  [k] nvmet_passthru_execute_cmd
+    5.37%     0.01%  kworker/0:2-mm_  [nvmet]  [k] nvmet_passthru_execute_cmd
+    5.18%     0.02%  kworker/0:2-eve  [nvmet]  [k] nvmet_passthru_execute_cmd
+    4.84%     0.02%  kworker/0:2-mm_  [nvmet]  [k] nvmet_passthru_execute_cmd
+    4.87%     0.01%  kworker/0:2-mm_  [nvmet]  [k] nvmet_passthru_execute_cmd

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-12-01 20:36:36 +01:00
Chaitanya Kulkarni 06b3bec820 nvmet: remove op_flags for passthru commands
For passthru commands setting op_flags has no meaning. Remove the code
that sets the op flags in nvmet_passthru_map_sg().

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-12-01 20:36:36 +01:00
Chaitanya Kulkarni 39dfe84451 nvme: split nvme_alloc_request()
Right now nvme_alloc_request() allocates a request from block layer
based on the value of the qid. When qid set to NVME_QID_ANY it used
blk_mq_alloc_request() else blk_mq_alloc_request_hctx().

The function nvme_alloc_request() is called from different context, The
only place where it uses non NVME_QID_ANY value is for fabrics connect
commands :-

nvme_submit_sync_cmd()		NVME_QID_ANY
nvme_features()			NVME_QID_ANY
nvme_sec_submit()		NVME_QID_ANY
nvmf_reg_read32()		NVME_QID_ANY
nvmf_reg_read64()		NVME_QID_ANY
nvmf_reg_write32()		NVME_QID_ANY
nvmf_connect_admin_queue()	NVME_QID_ANY
nvme_submit_user_cmd()		NVME_QID_ANY
	nvme_alloc_request()
nvme_keep_alive()		NVME_QID_ANY
	nvme_alloc_request()
nvme_timeout()			NVME_QID_ANY
	nvme_alloc_request()
nvme_delete_queue()		NVME_QID_ANY
	nvme_alloc_request()
nvmet_passthru_execute_cmd()	NVME_QID_ANY
	nvme_alloc_request()
nvmf_connect_io_queue() 	QID
	__nvme_submit_sync_cmd()
		nvme_alloc_request()

With passthru nvme_alloc_request() now falls into the I/O fast path such
that blk_mq_alloc_request_hctx() is never gets called and that adds
additional branch check in fast path.

Split the nvme_alloc_request() into nvme_alloc_request() and
nvme_alloc_request_qid().

Replace each call of the nvme_alloc_request() with NVME_QID_ANY param
with a call to newly added nvme_alloc_request() without NVME_QID_ANY.

Replace a call to nvme_alloc_request() with QID param with a call to
newly added nvme_alloc_request() and nvme_alloc_request_qid()
based on the qid value set in the __nvme_submit_sync_cmd().

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-12-01 20:36:35 +01:00
Chaitanya Kulkarni 47e9730c26 nvmet: add passthru io timeout value attr
NVMeOF controller in the passsthru mode is capable of handling wide set
of I/O commands including vender specific passhtru io comands.

The vendor specific I/O commands are used to read the large drive
logs and can take longer than default NVMe commands, i.e. for
passthru requests the timeout value may differ from the passthru
controller's default timeout values (nvme-core:io_timeout).

Add a configfs attribute so that user can set the io timeout values.
In case if this configfs value is not set nvme_alloc_request() will set
the NVME_IO_TIMEOUT value when request queuedata is NULL.

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-12-01 20:36:35 +01:00
Chaitanya Kulkarni a2f6a2b8ce nvmet: add passthru admin timeout value attr
NVMeOF controller in the passsthru mode is capable of handling wide set
of admin commands including vender specific passhtru admin comands.

The vendor specific admin commands are used to read the large drive
logs and can take longer than default NVMe commands, i.e. for
passthru requests the timeout value may differ from the passthru
controller's default timeout values (nvme-core:admin_timeout).

Add a configfs attribute so that user can set the admin timeout values.
In case if this configfs value is not set nvme_alloc_request() will set
the ADMIN_TIMEOUT value when request queuedata is NULL.

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-12-01 20:36:35 +01:00
Chaitanya Kulkarni dc96f93874 nvme: use consistent macro name for timeout
This is purely a clenaup patch, add prefix NVME to the ADMIN_TIMEOUT to
make consistent with NVME_IO_TIMEOUT.

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-12-01 20:36:35 +01:00
Chaitanya Kulkarni 0d2e7c840b nvme: centralize setting the timeout in nvme_alloc_request
The function nvme_alloc_request() is called from different context
(I/O and Admin queue) where callers do not consider the I/O timeout when
called from I/O queue context.

Update nvme_alloc_request() to set the default I/O and Admin timeout
value based on whether the queuedata is set or not.

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-12-01 20:36:35 +01:00
Baolin Wang 84115d6d80 nvme: simplify nvme_req_qid()
Use the request's '->mq_hctx->queue_num' directly to simplify the
nvme_req_qid() function.

Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-12-01 20:36:34 +01:00
James Smart 03d99e5d63 nvme-fcloop: add sysfs attribute to inject command drop
Add sysfs attribute to specify parameters for dropping a command.  The
attribute takes a string of:

  <opcode>:<starting a what instance>:<number of times>

Opcode is formatted as lower 8 bits are opcode.  If a fabrics opcode, a
bit above bits 7:0 will be set.

Once set, each sqe is looked at. If the opcode matches the running
instance count is updated. If the instance count is in the range of where
to drop (based on starting and # of times), then drop the command by not
passing it to the target layer.

Signed-off-by: James Smart <james.smart@broadcom.com>
2020-12-01 20:36:34 +01:00
Jason Gunthorpe ed92f6a52b Linux 5.10-rc5
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Merge tag 'v5.10-rc5' into rdma.git for-next

For dependencies in following patches

Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
2020-11-23 16:50:59 -04:00
Christoph Hellwig 5a7a9e038b RDMA/core: remove use of dma_virt_ops
Use the ib_dma_* helpers to skip the DMA translation instead.  This
removes the last user if dma_virt_ops and keeps the weird layering
violation inside the RDMA core instead of burderning the DMA mapping
subsystems with it.  This also means the software RDMA drivers now don't
have to mess with DMA parameters that are not relevant to them at all, and
that in the future we can use PCI P2P transfers even for software RDMA, as
there is no first fake layer of DMA mapping that the P2P DMA support.

Link: https://lore.kernel.org/r/20201106181941.1878556-8-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Mike Marciniszyn <mike.marciniszyn@cornelisnetworks.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
2020-11-17 15:22:07 -04:00
Jason Gunthorpe bf3b7b7ba9 Merge branch 'for-rc' into rdma.git
From https://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma.git

The rc RDMA branch is needed due to dependencies on the next patches.

Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
2020-11-17 15:20:26 -04:00
Christoph Hellwig d17e66aadb nvme: use set_capacity_and_notify in nvme_set_queue_dying
Use the block layer helper to update both the disk and block device
sizes.  Contrary to the name no notification is sent in this case,
as a size 0 is special cased.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-11-16 08:34:14 -07:00
Christoph Hellwig 449f4ec989 block: remove the update_bdev parameter to set_capacity_revalidate_and_notify
The update_bdev argument is always set to true, so remove it.  Also
rename the function to the slighly less verbose set_capacity_and_notify,
as propagating the disk size to the block device isn't really
revalidation.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Petr Vorel <pvorel@suse.cz>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-11-16 08:34:14 -07:00
Christoph Hellwig 5dd55749b7 nvme: let set_capacity_revalidate_and_notify update the bdev size
There is no good reason to call revalidate_disk_size separately.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-11-16 08:34:14 -07:00
Keith Busch 8168d23fbc nvme: fix memory leak freeing command effects
xa_destroy() frees only internal data. The caller is responsible for
freeing the exteranl objects referenced by an xarray.

Fixes: 1cf7a12e09 ("nvme: use an xarray to lookup the Commands Supported and Effects log")
Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-11-14 09:57:55 +01:00
Keith Busch f6224b8681 nvme: directly cache command effects log
Remove the struct used for tracking known command effects logs in a
list. This is now saved in an xarray that doesn't use these elements.
Instead, store the log directly instead of the wrapper struct.

Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-11-14 09:57:55 +01:00
Minwoo Im 0f0d2c876c nvme: free sq/cq dbbuf pointers when dbbuf set fails
If Doorbell Buffer Config command fails even 'dev->dbbuf_dbs != NULL'
which means OACS indicates that NVME_CTRL_OACS_DBBUF_SUPP is set,
nvme_dbbuf_update_and_check_event() will check event even it's not been
successfully set.

This patch fixes mismatch among dbbuf for sq/cqs in case that dbbuf
command fails.

Signed-off-by: Minwoo Im <minwoo.im.dev@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-11-14 09:57:55 +01:00
Christoph Hellwig 22dd4c7076 nvme-rdma: Use ibdev_to_node instead of dereferencing ->dma_device
->dma_device is a private implementation detail of the RDMA core.  Use the
ibdev_to_node helper to get the NUMA node for a ib_device instead of
poking into ->dma_device.

Link: https://lore.kernel.org/r/20201106181941.1878556-5-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
2020-11-12 13:33:44 -04:00
Sagi Grimberg 65c5a055b0 nvme: fix incorrect behavior when BLKROSET is called by the user
The offending commit breaks BLKROSET ioctl because a device
revalidation will blindly override BLKROSET setting. Hence,
we remove the disk rw setting in case NVME_NS_ATTR_RO is cleared
from by the controller.

Fixes: 1293477f4f ("nvme: set gendisk read only based on nsattr")
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-11-09 17:39:15 +01:00
Jens Axboe 7ae7a8de05 nvme fixes for 5.10:
- revert a nvme_queue size optimization (Keith Bush)
  - fabrics timeout races fixes (Chao Leng and Sagi Grimberg)
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Merge tag 'nvme-5.10-2020-11-05' of git://git.infradead.org/nvme into block-5.10

Pull NVMe fixes from Christoph:

"nvme fixes for 5.10:

 - revert a nvme_queue size optimization (Keith Bush)
 - fabrics timeout races fixes (Chao Leng and Sagi Grimberg)"

* tag 'nvme-5.10-2020-11-05' of git://git.infradead.org/nvme:
  nvme-tcp: avoid repeated request completion
  nvme-rdma: avoid repeated request completion
  nvme-tcp: avoid race between time out and tear down
  nvme-rdma: avoid race between time out and tear down
  nvme: introduce nvme_sync_io_queues
  Revert "nvme-pci: remove last_sq_tail"
2020-11-05 07:10:50 -07:00
Sagi Grimberg 0a8a2c85b8 nvme-tcp: avoid repeated request completion
The request may be executed asynchronously, and rq->state may be
changed to IDLE. To avoid repeated request completion, only
MQ_RQ_COMPLETE of rq->state is checked in nvme_tcp_complete_timed_out.
It is not safe, so need adding check IDLE for rq->state.

Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Chao Leng <lengchao@huawei.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-11-03 10:26:02 +01:00
Sagi Grimberg fdf58e02ad nvme-rdma: avoid repeated request completion
The request may be executed asynchronously, and rq->state may be
changed to IDLE. To avoid repeated request completion, only
MQ_RQ_COMPLETE of rq->state is checked in nvme_rdma_complete_timed_out.
It is not safe, so need adding check IDLE for rq->state.

Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Chao Leng <lengchao@huawei.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-11-03 10:26:02 +01:00
Chao Leng d6f66210f4 nvme-tcp: avoid race between time out and tear down
Now use teardown_lock to serialize for time out and tear down. This may
cause abnormal: first cancel all request in tear down, then time out may
complete the request again, but the request may already be freed or
restarted.

To avoid race between time out and tear down, in tear down process,
first we quiesce the queue, and then delete the timer and cancel
the time out work for the queue. At the same time we need to delete
teardown_lock.

Signed-off-by: Chao Leng <lengchao@huawei.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-11-03 10:26:02 +01:00
Chao Leng 3017013dcc nvme-rdma: avoid race between time out and tear down
Now use teardown_lock to serialize for time out and tear down. This may
cause abnormal: first cancel all request in tear down, then time out may
complete the request again, but the request may already be freed or
restarted.

To avoid race between time out and tear down, in tear down process,
first we quiesce the queue, and then delete the timer and cancel
the time out work for the queue. At the same time we need to delete
teardown_lock.

Signed-off-by: Chao Leng <lengchao@huawei.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-11-03 10:26:01 +01:00
Chao Leng 04800fbff4 nvme: introduce nvme_sync_io_queues
Introduce sync io queues for some scenarios which just only need sync
io queues not sync all queues.

Signed-off-by: Chao Leng <lengchao@huawei.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-11-03 10:25:55 +01:00
Keith Busch 38210800bf Revert "nvme-pci: remove last_sq_tail"
Multiple CPUs may be mapped to the same hctx, allowing mulitple
submission contexts to attempt commit_rqs(). We need to verify we're
not writing the same doorbell value multiple times since that's a spec
violation.

Revert commit 54b2fcee1d.

Link: https://bugzilla.redhat.com/show_bug.cgi?id=1878596
Reported-by: "B.L. Jones" <brandon.gustav@googlemail.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
2020-11-02 19:03:14 +01:00
Linus Torvalds 5fc6b075e1 block-5.10-2020-10-30
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Merge tag 'block-5.10-2020-10-30' of git://git.kernel.dk/linux-block

Pull block fixes from Jens Axboe:

 - null_blk zone fixes (Damien, Kanchan)

 - NVMe pull request from Christoph:
       - improve zone revalidation (Keith Busch)
       - gracefully handle zero length messages in nvme-rdma (zhenwei pi)
       - nvme-fc error handling fixes (James Smart)
       - nvmet tracing NULL pointer dereference fix (Chaitanya Kulkarni)"

 - xsysace platform fixes (Andy)

 - scatterlist type cleanup (David)

 - blk-cgroup memory fixes (Gabriel)

 - nbd block size update fix (Ming)

 - Flush completion state fix (Ming)

 - bio_add_hw_page() iteration fix (Naohiro)

* tag 'block-5.10-2020-10-30' of git://git.kernel.dk/linux-block:
  blk-mq: mark flush request as IDLE in flush_end_io()
  lib/scatterlist: use consistent sg_copy_buffer() return type
  xsysace: use platform_get_resource() and platform_get_irq_optional()
  null_blk: Fix locking in zoned mode
  null_blk: Fix zone reset all tracing
  nbd: don't update block size after device is started
  block: advance iov_iter on bio_add_hw_page failure
  null_blk: synchronization fix for zoned device
  nvmet: fix a NULL pointer dereference when tracing the flush command
  nvme-fc: remove nvme_fc_terminate_io()
  nvme-fc: eliminate terminate_io use by nvme_fc_error_recovery
  nvme-fc: remove err_work work item
  nvme-fc: track error_recovery while connecting
  nvme-rdma: handle unexpected nvme completion data length
  nvme: ignore zone validate errors on subsequent scans
  blk-cgroup: Pre-allocate tree node on blkg_conf_prep
  blk-cgroup: Fix memleak on error path
2020-10-30 15:02:49 -07:00
Jason Gunthorpe 071ba4cc55 RDMA: Add rdma_connect_locked()
There are two flows for handling RDMA_CM_EVENT_ROUTE_RESOLVED, either the
handler triggers a completion and another thread does rdma_connect() or
the handler directly calls rdma_connect().

In all cases rdma_connect() needs to hold the handler_mutex, but when
handler's are invoked this is already held by the core code. This causes
ULPs using the 2nd method to deadlock.

Provide a rdma_connect_locked() and have all ULPs call it from their
handlers.

Link: https://lore.kernel.org/r/0-v2-53c22d5c1405+33-rdma_connect_locking_jgg@nvidia.com
Reported-and-tested-by: Guoqing Jiang <guoqing.jiang@cloud.ionos.com>
Fixes: 2a7cec5381 ("RDMA/cma: Fix locking for the RDMA_CM_CONNECT state")
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Acked-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Max Gurtovoy <mgurtovoy@nvidia.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
2020-10-28 09:14:49 -03:00
Chaitanya Kulkarni 3c3751f2da nvmet: fix a NULL pointer dereference when tracing the flush command
When target side trace in turned on and flush command is issued from the
host it results in the following Oops.

[  856.789724] BUG: kernel NULL pointer dereference, address: 0000000000000068
[  856.790686] #PF: supervisor read access in kernel mode
[  856.791262] #PF: error_code(0x0000) - not-present page
[  856.791863] PGD 6d7110067 P4D 6d7110067 PUD 66f0ad067 PMD 0
[  856.792527] Oops: 0000 [#1] SMP NOPTI
[  856.792950] CPU: 15 PID: 7034 Comm: nvme Tainted: G           OE     5.9.0nvme-5.9+ #71
[  856.793790] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.0-59-gc9ba5276e3214
[  856.794956] RIP: 0010:trace_event_raw_event_nvmet_req_init+0x13e/0x170 [nvmet]
[  856.795734] Code: 41 5c 41 5d c3 31 d2 31 f6 e8 4e 9b b8 e0 e9 0e ff ff ff 49 8b 55 00 48 8b 38 8b 0
[  856.797740] RSP: 0018:ffffc90001be3a60 EFLAGS: 00010246
[  856.798375] RAX: 0000000000000000 RBX: ffff8887e7d2c01c RCX: 0000000000000000
[  856.799234] RDX: 0000000000000020 RSI: 0000000057e70ea2 RDI: ffff8887e7d2c034
[  856.800088] RBP: ffff88869f710578 R08: ffff888807500d40 R09: 00000000fffffffe
[  856.800951] R10: 0000000064c66670 R11: 00000000ef955201 R12: ffff8887e7d2c034
[  856.801807] R13: ffff88869f7105c8 R14: 0000000000000040 R15: ffff88869f710440
[  856.802667] FS:  00007f6a22bd8780(0000) GS:ffff888813a00000(0000) knlGS:0000000000000000
[  856.803635] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  856.804367] CR2: 0000000000000068 CR3: 00000006d73e0000 CR4: 00000000003506e0
[  856.805283] Call Trace:
[  856.805613]  nvmet_req_init+0x27c/0x480 [nvmet]
[  856.806200]  nvme_loop_queue_rq+0xcb/0x1d0 [nvme_loop]
[  856.806862]  blk_mq_dispatch_rq_list+0x123/0x7b0
[  856.807459]  ? kvm_sched_clock_read+0x14/0x30
[  856.808025]  __blk_mq_sched_dispatch_requests+0xc7/0x170
[  856.808708]  blk_mq_sched_dispatch_requests+0x30/0x60
[  856.809372]  __blk_mq_run_hw_queue+0x70/0x100
[  856.809935]  __blk_mq_delay_run_hw_queue+0x156/0x170
[  856.810574]  blk_mq_run_hw_queue+0x86/0xe0
[  856.811104]  blk_mq_sched_insert_request+0xef/0x160
[  856.811733]  blk_execute_rq+0x69/0xc0
[  856.812212]  ? blk_mq_rq_ctx_init+0xd0/0x230
[  856.812784]  nvme_execute_passthru_rq+0x57/0x130 [nvme_core]
[  856.813461]  nvme_submit_user_cmd+0xeb/0x300 [nvme_core]
[  856.814099]  nvme_user_cmd.isra.82+0x11e/0x1a0 [nvme_core]
[  856.814752]  blkdev_ioctl+0x1dc/0x2c0
[  856.815197]  block_ioctl+0x3f/0x50
[  856.815606]  __x64_sys_ioctl+0x84/0xc0
[  856.816074]  do_syscall_64+0x33/0x40
[  856.816533]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[  856.817168] RIP: 0033:0x7f6a222ed107
[  856.817617] Code: 44 00 00 48 8b 05 81 cd 2c 00 64 c7 00 26 00 00 00 48 c7 c0 ff ff ff ff c3 66 2e 8
[  856.819901] RSP: 002b:00007ffca848f058 EFLAGS: 00000202 ORIG_RAX: 0000000000000010
[  856.820846] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f6a222ed107
[  856.821726] RDX: 00007ffca848f060 RSI: 00000000c0484e43 RDI: 0000000000000003
[  856.822603] RBP: 0000000000000003 R08: 000000000000003f R09: 0000000000000005
[  856.823478] R10: 00007ffca848ece0 R11: 0000000000000202 R12: 00007ffca84912d3
[  856.824359] R13: 00007ffca848f4d0 R14: 0000000000000002 R15: 000000000067e900
[  856.825236] Modules linked in: nvme_loop(OE) nvmet(OE) nvme_fabrics(OE) null_blk nvme(OE) nvme_corel

Move the nvmet_req_init() tracepoint after we parse the command in
nvmet_req_init() so that we can get rid of the duplicate
nvmet_find_namespace() call.
Rename __assign_disk_name() ->  __assign_req_name(). Now that we call
tracepoint after parsing the command simplify the newly added
__assign_req_name() which fixes this bug.

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-10-27 10:02:50 +01:00
James Smart ac9b820e71 nvme-fc: remove nvme_fc_terminate_io()
__nvme_fc_terminate_io() is now called by only 1 place, in reset_work.
Consoldate and move the functionality of terminate_io into reset_work.

In reset_work, rather than calling the create_association directly,
schedule the connect work element to do its thing. After scheduling,
flush the connect work element to continue with semantic of not
returning until connect has been attempted at least once.

Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-10-27 10:02:29 +01:00
James Smart 95ced8a2c7 nvme-fc: eliminate terminate_io use by nvme_fc_error_recovery
nvme_fc_error_recovery() special cases handling when in CONNECTING state
and calls __nvme_fc_terminate_io(). __nvme_fc_terminate_io() itself
special cases CONNECTING state and calls the routine to abort outstanding
ios.

Simplify the sequence by putting the call to abort outstanding I/Os
directly in nvme_fc_error_recovery.

Move the location of __nvme_fc_abort_outstanding_ios(), and
nvme_fc_terminate_exchange() which is called by it, to avoid adding
function prototypes for nvme_fc_error_recovery().

Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-10-27 10:02:08 +01:00
James Smart 9c2bb2577d nvme-fc: remove err_work work item
err_work was created to handle errors (mainly I/O timeouts) while in
CONNECTING state. The flag for err_work_active is also unneeded.

Remove err_work_active and err_work.  The actions to abort I/Os are moved
inline to nvme_error_recovery().

Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-10-27 10:01:39 +01:00
James Smart caf1cbe367 nvme-fc: track error_recovery while connecting
Whenever there are errors during CONNECTING, the driver recovers by
aborting all outstanding ios and counts on the io completion to fail them
and thus the connection/association they are on.  However, the connection
failure depends on a failure state from the core routines.  Not all
commands that are issued by the core routine are guaranteed to cause a
failure of the core routine. They may be treated as a failure status and
the status is then ignored.

As such, whenever the transport enters error_recovery while CONNECTING,
it will set a new flag indicating an association failed. The
create_association routine which creates and initializes the controller,
will monitor the state of the flag as well as the core routine error
status and ensure the association fails if there was an error.

Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-10-27 10:01:30 +01:00
zhenwei pi 25c1ca6eca nvme-rdma: handle unexpected nvme completion data length
Receiving a zero length message leads to the following warnings because
the CQE is processed twice:

refcount_t: underflow; use-after-free.
WARNING: CPU: 0 PID: 0 at lib/refcount.c:28

RIP: 0010:refcount_warn_saturate+0xd9/0xe0
Call Trace:
 <IRQ>
 nvme_rdma_recv_done+0xf3/0x280 [nvme_rdma]
 __ib_process_cq+0x76/0x150 [ib_core]
 ...

Sanity check the received data length, to avoids this.

Thanks to Chao Leng & Sagi for suggestions.

Signed-off-by: zhenwei pi <pizhenwei@bytedance.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-10-27 10:00:05 +01:00
Keith Busch 8685699c28 nvme: ignore zone validate errors on subsequent scans
Revalidating nvme zoned namespaces requires IO commands, and there are
controller states that prevent IO. For example, a sanitize in progress
is required to fail all IO, but we don't want to remove a namespace
we've previously added just because the controller is in such a state.
Suppress the error in this case.

Reported-by: Michael Nguyen <michael.nguyen@wdc.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-10-27 09:58:42 +01:00
James Smart f673714a12 nvme-fc: shorten reconnect delay if possible for FC
We've had several complaints about a 10s reconnect delay (the default)
when there was an error while there is connectivity to a subsystem.
The max_reconnects and reconnect_delay are set in common code prior to
calling the transport to create the controller.

This change checks if the default reconnect delay is being used, and if
so, it adjusts it to a shorter period (2s) for the nvme-fc transport.
It does so by calculating the controller loss tmo window, changing the
value of the reconnect delay, and then recalculating the maximum number
of reconnect attempts allowed.

Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-10-23 12:54:45 +02:00
James Smart 88e837ed0f nvme-fc: wait for queues to freeze before calling update_hr_hw_queues
On reconnect, the code currently does not freeze the controller before
possibly updating the number hw queues for the controller.

Add the freeze before updating the number of hw queues.  Note: the queues
are already started and remain started through the reconnect.

Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-10-23 12:54:36 +02:00
James Smart 514a6dc9ec nvme-fc: fix error loop in create_hw_io_queues
The loop that backs out of hw io queue creation continues through index
0, which corresponds to the admin queue as well.

Fix the loop so it only proceeds through indexes 1..n which correspond to
I/O queues.

Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-10-23 12:54:23 +02:00
James Smart 52793d62a6 nvme-fc: fix io timeout to abort I/O
Currently, an I/O timeout unconditionally invokes
nvme_fc_error_recovery() which checks for LIVE or CONNECTING state.  If
live, the routine resets the controller which initiates a reconnect -
which is valid.  If CONNECTING, err_work is scheduled.  Err_work then
calls the terminate_io routine, which also checks for CONNECTING and
noops any further action on outstanding I/O.  The result is nothing
happened to the timed out io.  As such, if the command was dropped on
the wire, it will never timeout / complete, and the connect process
will hang.

Change the behavior of the io timeout routine to unconditionally abort
the I/O.  I/O completion handling will note that an io failed due to an
abort and will terminate the connection / association as needed.  If the
abort was unable to happen, continue with a call to
nvme_fc_error_recovery(). To ensure something different happens in
nvme_fc_error_recovery() rework it so at it will abort all I/Os on the
association to force a failure.

As I/O aborts now may occur outside of delete_association, counting for
completion must be wary and only count those aborted during
delete_association when TERMIO is set on the controller.

Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-10-23 12:52:16 +02:00
Chaitanya Kulkarni 150dfb6c83 nvmet: don't use BLK_MQ_REQ_NOWAIT for passthru
By default, we set the passthru request allocation flag such that it
returns the error in the following code path and we fail the I/O when
BLK_MQ_REQ_NOWAIT is used for request allocation :-

nvme_alloc_request()
 blk_mq_alloc_request()
  blk_mq_queue_enter()
   if (flag & BLK_MQ_REQ_NOWAIT)
        return -EBUSY; <-- return if busy.

On some controllers using BLK_MQ_REQ_NOWAIT ends up in I/O error where
the controller is perfectly healthy and not in a degraded state.

Block layer request allocation does allow us to wait instead of
immediately returning the error when we BLK_MQ_REQ_NOWAIT flag is not
used. This has shown to fix the I/O error problem reported under
heavy random write workload.

Remove the BLK_MQ_REQ_NOWAIT parameter for passthru request allocation
which resolves this issue.

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-10-22 15:28:02 +02:00
Logan Gunthorpe 5e063101ff nvmet: cleanup nvmet_passthru_map_sg()
Clean up some confusing elements of nvmet_passthru_map_sg() by returning
early if the request is greater than the maximum bio size. This allows
us to drop the sg_cnt variable.

This should not result in any functional change but makes the code
clearer and more understandable. The original code allocated a truncated
bio then would return EINVAL when bio_add_pc_page() filled that bio. The
new code just returns EINVAL early if this would happen.

Fixes: c1fef73f79 ("nvmet: add passthru code to process commands")
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Suggested-by: Douglas Gilbert <dgilbert@interlog.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-10-22 15:28:02 +02:00
Logan Gunthorpe df06047d54 nvmet: limit passthru MTDS by BIO_MAX_PAGES
nvmet_passthru_map_sg() only supports mapping a single BIO, not a chain
so the effective maximum transfer should also be limitted by
BIO_MAX_PAGES (presently this works out to 1MB).

For PCI passthru devices the max_sectors would typically be more
limitting than BIO_MAX_PAGES, but this may not be true for all passthru
devices.

Fixes: c1fef73f79 ("nvmet: add passthru code to process commands")
Suggested-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Sagi Grimberg <sagi@grimberg.me>
Cc: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-10-22 15:27:57 +02:00
zhenwei pi 85bd23f3dc nvmet: fix uninitialized work for zero kato
When connecting a controller with a zero kato value using the following
command line

   nvme connect -t tcp -n NQN -a ADDR -s PORT --keep-alive-tmo=0

the warning below can be reproduced:

WARNING: CPU: 1 PID: 241 at kernel/workqueue.c:1627 __queue_delayed_work+0x6d/0x90
with trace:
  mod_delayed_work_on+0x59/0x90
  nvmet_update_cc+0xee/0x100 [nvmet]
  nvmet_execute_prop_set+0x72/0x80 [nvmet]
  nvmet_tcp_try_recv_pdu+0x2f7/0x770 [nvmet_tcp]
  nvmet_tcp_io_work+0x63f/0xb2d [nvmet_tcp]
  ...

This is caused by queuing up an uninitialized work.  Althrough the
keep-alive timer is disabled during allocating the controller (fixed in
0d3b6a8d21), ka_work still has a chance to run (called by
nvmet_start_ctrl).

Fixes: 0d3b6a8d21 ("nvmet: Disable keep-alive timer when kato is cleared to 0h")
Signed-off-by: zhenwei pi <pizhenwei@bytedance.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-10-22 15:27:14 +02:00
Kai-Heng Feng 02ca079c99 nvme-pci: disable Write Zeroes on Sandisk Skyhawk
Like commit 5611ec2b98 ("nvme-pci: prevent SK hynix PC400 from using
Write Zeroes command"), Sandisk Skyhawk has the same issue:
[ 6305.633887] blk_update_request: operation not supported error, dev nvme0n1, sector 340812032 op 0x9:(WRITE_ZEROES) flags 0x0 phys_seg 0 prio class 0

So also disable Write Zeroes command on Sandisk Skyhawk.

BugLink: https://bugs.launchpad.net/bugs/1899503
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-10-22 15:27:14 +02:00
Keith Busch 643c476d6f nvme: use queuedata for nvme_req_qid
The request's rq_disk isn't set for passthrough IO commands, so tracing
uses qid 0 for these which incorrectly decodes as an admin command. Use
the request_queue's queuedata instead since that value is always set for
the IO queues, and never set for the admin queue.

Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-10-22 15:27:14 +02:00
Chao Leng a87da50f39 nvme-rdma: fix crash due to incorrect cqe
A crash happened due to injecting error test.
When a CQE has incorrect command id due do an error injection, the host
may find a request which is already freed.  Dereferencing req->mr->rkey
causes a crash in nvme_rdma_process_nvme_rsp because the mr is already
freed.

Add a check for the mr to fix it.

Signed-off-by: Chao Leng <lengchao@huawei.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-10-22 15:27:14 +02:00
Chao Leng 43efdb8e87 nvme-rdma: fix crash when connect rejected
A crash can happened when a connect is rejected.   The host establishes
the connection after received ConnectReply, and then continues to send
the fabrics Connect command.  If the controller does not receive the
ReadyToUse capsule, host may receive a ConnectReject reply.

Call nvme_rdma_destroy_queue_ib after the host received the
RDMA_CM_EVENT_REJECTED event.  Then when the fabrics Connect command
times out, nvme_rdma_timeout calls nvme_rdma_complete_rq to fail the
request.  A crash happenes due to use after free in
nvme_rdma_complete_rq.

nvme_rdma_destroy_queue_ib is redundant when handling the
RDMA_CM_EVENT_REJECTED event as nvme_rdma_destroy_queue_ib is already
called in connection failure handler.

Signed-off-by: Chao Leng <lengchao@huawei.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-10-22 15:27:13 +02:00
Keith Busch afaf5c6c81 nvme: translate zone resource errors
Translate zoned resource errors to the appropriate blk_status_t.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-10-13 15:05:05 -06:00
Linus Torvalds 7cd4ecd917 drivers-5.10-2020-10-12
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Merge tag 'drivers-5.10-2020-10-12' of git://git.kernel.dk/linux-block

Pull block driver updates from Jens Axboe:
 "Here are the driver updates for 5.10.

  A few SCSI updates in here too, in coordination with Martin as they
  depend on core block changes for the shared tag bitmap.

  This contains:

   - NVMe pull requests via Christoph:
      - fix keep alive timer modification (Amit Engel)
      - order the PCI ID list more sensibly (Andy Shevchenko)
      - cleanup the open by controller helper (Chaitanya Kulkarni)
      - use an xarray for the CSE log lookup (Chaitanya Kulkarni)
      - support ZNS in nvmet passthrough mode (Chaitanya Kulkarni)
      - fix nvme_ns_report_zones (Christoph Hellwig)
      - add a sanity check to nvmet-fc (James Smart)
      - fix interrupt allocation when too many polled queues are
        specified (Jeffle Xu)
      - small nvmet-tcp optimization (Mark Wunderlich)
      - fix a controller refcount leak on init failure (Chaitanya
        Kulkarni)
      - misc cleanups (Chaitanya Kulkarni)
      - major refactoring of the scanning code (Christoph Hellwig)

   - MD updates via Song:
      - Bug fixes in bitmap code, from Zhao Heming
      - Fix a work queue check, from Guoqing Jiang
      - Fix raid5 oops with reshape, from Song Liu
      - Clean up unused code, from Jason Yan
      - Discard improvements, from Xiao Ni
      - raid5/6 page offset support, from Yufen Yu

   - Shared tag bitmap for SCSI/hisi_sas/null_blk (John, Kashyap,
     Hannes)

   - null_blk open/active zone limit support (Niklas)

   - Set of bcache updates (Coly, Dongsheng, Qinglang)"

* tag 'drivers-5.10-2020-10-12' of git://git.kernel.dk/linux-block: (78 commits)
  md/raid5: fix oops during stripe resizing
  md/bitmap: fix memory leak of temporary bitmap
  md: fix the checking of wrong work queue
  md/bitmap: md_bitmap_get_counter returns wrong blocks
  md/bitmap: md_bitmap_read_sb uses wrong bitmap blocks
  md/raid0: remove unused function is_io_in_chunk_boundary()
  nvme-core: remove extra condition for vwc
  nvme-core: remove extra variable
  nvme: remove nvme_identify_ns_list
  nvme: refactor nvme_validate_ns
  nvme: move nvme_validate_ns
  nvme: query namespace identifiers before adding the namespace
  nvme: revalidate zone bitmaps in nvme_update_ns_info
  nvme: remove nvme_update_formats
  nvme: update the known admin effects
  nvme: set the queue limits in nvme_update_ns_info
  nvme: remove the 0 lba_shift check in nvme_update_ns_info
  nvme: clean up the check for too large logic block sizes
  nvme: freeze the queue over ->lba_shift updates
  nvme: factor out a nvme_configure_metadata helper
  ...
2020-10-13 13:04:41 -07:00
Linus Torvalds 3ad11d7ac8 block-5.10-2020-10-12
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Merge tag 'block-5.10-2020-10-12' of git://git.kernel.dk/linux-block

Pull block updates from Jens Axboe:

 - Series of merge handling cleanups (Baolin, Christoph)

 - Series of blk-throttle fixes and cleanups (Baolin)

 - Series cleaning up BDI, seperating the block device from the
   backing_dev_info (Christoph)

 - Removal of bdget() as a generic API (Christoph)

 - Removal of blkdev_get() as a generic API (Christoph)

 - Cleanup of is-partition checks (Christoph)

 - Series reworking disk revalidation (Christoph)

 - Series cleaning up bio flags (Christoph)

 - bio crypt fixes (Eric)

 - IO stats inflight tweak (Gabriel)

 - blk-mq tags fixes (Hannes)

 - Buffer invalidation fixes (Jan)

 - Allow soft limits for zone append (Johannes)

 - Shared tag set improvements (John, Kashyap)

 - Allow IOPRIO_CLASS_RT for CAP_SYS_NICE (Khazhismel)

 - DM no-wait support (Mike, Konstantin)

 - Request allocation improvements (Ming)

 - Allow md/dm/bcache to use IO stat helpers (Song)

 - Series improving blk-iocost (Tejun)

 - Various cleanups (Geert, Damien, Danny, Julia, Tetsuo, Tian, Wang,
   Xianting, Yang, Yufen, yangerkun)

* tag 'block-5.10-2020-10-12' of git://git.kernel.dk/linux-block: (191 commits)
  block: fix uapi blkzoned.h comments
  blk-mq: move cancel of hctx->run_work to the front of blk_exit_queue
  blk-mq: get rid of the dead flush handle code path
  block: get rid of unnecessary local variable
  block: fix comment and add lockdep assert
  blk-mq: use helper function to test hw stopped
  block: use helper function to test queue register
  block: remove redundant mq check
  block: invoke blk_mq_exit_sched no matter whether have .exit_sched
  percpu_ref: don't refer to ref->data if it isn't allocated
  block: ratelimit handle_bad_sector() message
  blk-throttle: Re-use the throtl_set_slice_end()
  blk-throttle: Open code __throtl_de/enqueue_tg()
  blk-throttle: Move service tree validation out of the throtl_rb_first()
  blk-throttle: Move the list operation after list validation
  blk-throttle: Fix IO hang for a corner case
  blk-throttle: Avoid tracking latency if low limit is invalid
  blk-throttle: Avoid getting the current time if tg->last_finish_time is 0
  blk-throttle: Remove a meaningless parameter for throtl_downgrade_state()
  block: Remove redundant 'return' statement
  ...
2020-10-13 12:12:44 -07:00
Linus Torvalds 583090b1b8 block5.9-2020-10-08
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Merge tag 'block5.9-2020-10-08' of git://git.kernel.dk/linux-block

Pull block fixes from Jens Axboe:
 "A few fixes that should go into this release:

   - NVMe controller error path reference fix (Chaitanya)

   - Fix regression with IBM partitions on non-dasd devices (Christoph)

   - Fix a missing clear in the compat CDROM packet structure (Peilin)"

* tag 'block5.9-2020-10-08' of git://git.kernel.dk/linux-block:
  partitions/ibm: fix non-DASD devices
  nvme-core: put ctrl ref when module ref get fail
  block/scsi-ioctl: Fix kernel-infoleak in scsi_put_cdrom_generic_arg()
2020-10-08 18:48:34 -07:00
Chaitanya Kulkarni c4485252cf nvme-core: remove extra condition for vwc
In nvme_set_queue_limits() we initialize vwc to false and later add
a condition to set vwc true. The value of the vwc can be declare
initialized which makes all the blk_queue_XXX() calls uniform.

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-10-07 07:56:20 +02:00
Chaitanya Kulkarni af5d6f7ba5 nvme-core: remove extra variable
In nvme_validate_ns() the exra variable ctrl is used only twice.
Using ns->ctrl directly still maintains the redability and original
length of the lines in the code. Get rid of the extra variable ctrl &
use ns->ctrl directly.

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-10-07 07:56:20 +02:00
Christoph Hellwig 7b15336257 nvme: remove nvme_identify_ns_list
Just fold it into the only caller.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
2020-10-07 07:56:19 +02:00
Christoph Hellwig 0a05226a3a nvme: refactor nvme_validate_ns
Move the logic to revalidate the block_device size or remove the
namespace from the caller into nvme_validate_ns.  This removes
the return value and thus the status code translation.  Additionally
it also catches non-permanent errors from nvme_update_ns_info using
the existing logic.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
2020-10-07 07:56:19 +02:00
Christoph Hellwig b2dc748a70 nvme: move nvme_validate_ns
Move nvme_validate_ns just above its only remaining caller.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
2020-10-07 07:56:19 +02:00
Christoph Hellwig 8b7c0ff2d4 nvme: query namespace identifiers before adding the namespace
Check the namespace identifier list first thing when scanning namespaces.
This keeps the code to query the CSI common between the alloc and validate
path, and helps to structure the code better for multiple command set
support.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
2020-10-07 07:56:19 +02:00
Christoph Hellwig 3a9967ba7a nvme: revalidate zone bitmaps in nvme_update_ns_info
Consolidate the two calls into a single place.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
2020-10-07 07:56:19 +02:00
Christoph Hellwig af0f446d2c nvme: remove nvme_update_formats
Now that the queue is frozen before updating ->lba_shift we can't hit the
invalid references mentioned in the comment any more.  More importantly
this code would not have helped us if the format was changed by another
controller or through implementation defined back channels.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
2020-10-07 07:56:19 +02:00
Christoph Hellwig 75eb779ee0 nvme: update the known admin effects
A Format NVM command can change the capabilities of namespaces, while
Sanitize does change the Logical Block Content and must be serialized.

Also remove CSUPP bit for Format - it is not a mandatory command,
and we don't check for the bit anyway.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
2020-10-07 07:56:19 +02:00
Christoph Hellwig 658d9f7c2c nvme: set the queue limits in nvme_update_ns_info
Only set the queue limits once we have the real block size.  This also
updates the limits on a rescan if needed.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
2020-10-07 07:56:18 +02:00
Christoph Hellwig 310b30e575 nvme: remove the 0 lba_shift check in nvme_update_ns_info
We can no longer reach this code if Identify Namespace failed.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
2020-10-07 07:56:18 +02:00
Christoph Hellwig 13f0b26bbf nvme: clean up the check for too large logic block sizes
Use a single statement to set both the capacity and fake block size
instead of two.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
2020-10-07 07:56:18 +02:00
Christoph Hellwig f9d5f4579f nvme: freeze the queue over ->lba_shift updates
Ensure that there can't be any I/O in flight went we change the disk
geometry in nvme_update_ns_info, most notable the LBA size by lifting
the queue free from nvme_update_disk_info into the caller

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
2020-10-07 07:56:18 +02:00
Christoph Hellwig d4609ea8b3 nvme: factor out a nvme_configure_metadata helper
Factor out a helper from nvme_update_ns_info that configures the
per-namespaces metadata and PI settings.  Also make sure the helpers
clear the flags explicitly instead of all of ->features to allow for
potentially reusing ->features for future non-metadata flags.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
2020-10-07 07:56:18 +02:00
Christoph Hellwig fab72f5a04 nvme: call nvme_identify_ns as the first thing in nvme_alloc_ns_block
Check if the namespace actually exists as the very first thing and don't
bother with any extra work if not.  This should speed up and simplify
the sequential scanning for NVMe 1.0 devices.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
2020-10-07 07:56:18 +02:00
Christoph Hellwig b8b8cd0133 nvme: lift the check for an unallocated namespace into nvme_identify_ns
Move the check from the two callers into the common helper.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
2020-10-07 07:56:18 +02:00
Christoph Hellwig 81382f1730 nvme: rename __nvme_revalidate_disk
Rename __nvme_revalidate_disk to nvme_update_ns_info and pass a
namespace instead of the gendisk.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
2020-10-07 07:56:17 +02:00
Christoph Hellwig 2124f096fb nvme: rename _nvme_revalidate_disk
Rename _nvme_revalidate_disk to nvme_validate_ns to better describe
what the function does, and pass the struct nvme_ns instead of the
gendisk to better match the call chain.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
2020-10-07 07:56:17 +02:00
Christoph Hellwig eba9bcf7fe nvme: rename nvme_validate_ns to nvme_validate_or_alloc_ns
Use a slightly more descriptive name to enable reusing nvme_validate_ns
in the next patch for a lower level function.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
2020-10-07 07:56:17 +02:00
Christoph Hellwig d525c3c023 nvme: remove the disk argument to nvme_update_zone_info
The queue can trivially be derived from the nvme_ns structure.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
2020-10-07 07:56:17 +02:00
Christoph Hellwig 7fad20dd7c nvme: fix initialization of the zone bitmaps
The removal of the ->revalidate_disk method broke the initialization of
the zone bitmaps, as nvme_revalidate_disk now never gets called during
initialization.

Move the zone related code from nvme_revalidate_disk into a new helper in
zns.c, and call it from nvme_alloc_ns in addition to nvme_validate_ns to
ensure the zone bitmaps are initialized during probe.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
2020-10-07 07:56:17 +02:00
Chaitanya Kulkarni 1401fcc4e3 nvme-loop: don't put ctrl on nvme_init_ctrl error
The function nvme_init_ctrl() gets the ctrl reference & when it fails it
does put the ctrl reference in the error unwind code.

When creating loop ctrl in nvme_loop_create_ctrl() if nvme_init_ctrl()
returns non zero (i.e. error) value it jumps to the "out_put_ctrl" label
which calls nvme_put_ctrl(), that will lead to douple ctrl put in error
unwind path.

Update nvme_loop_create_ctrl() such that this patch removes the
"out_put_ctrl" label, add a new "out" label after nvme_put_ctrl() in
error unwind path and jump to newly added label when nvme_init_ctrl()
call retuns an error.

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-10-07 07:56:16 +02:00
Chaitanya Kulkarni 4bab690930 nvme-core: put ctrl ref when module ref get fail
When try_module_get() fails in the nvme_dev_open() it returns without
releasing the ctrl reference which was taken earlier.

Put the ctrl reference which is taken before calling the
try_module_get() in the error return code path.

Fixes: 52a3974feb "nvme-core: get/put ctrl and transport module in nvme_dev_open/release()"
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-10-07 07:55:40 +02:00
Linus Torvalds 165563c050 Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Pull networking fixes from David Miller:

 1) Make sure SKB control block is in the proper state during IPSEC
    ESP-in-TCP encapsulation. From Sabrina Dubroca.

 2) Various kinds of attributes were not being cloned properly when we
    build new xfrm_state objects from existing ones. Fix from Antony
    Antony.

 3) Make sure to keep BTF sections, from Tony Ambardar.

 4) TX DMA channels need proper locking in lantiq driver, from Hauke
    Mehrtens.

 5) Honour route MTU during forwarding, always. From Maciej
    Żenczykowski.

 6) Fix races in kTLS which can result in crashes, from Rohit
    Maheshwari.

 7) Skip TCP DSACKs with rediculous sequence ranges, from Priyaranjan
    Jha.

 8) Use correct address family in xfrm state lookups, from Herbert Xu.

 9) A bridge FDB flush should not clear out user managed fdb entries
    with the ext_learn flag set, from Nikolay Aleksandrov.

10) Fix nested locking of netdev address lists, from Taehee Yoo.

11) Fix handling of 32-bit DATA_FIN values in mptcp, from Mat Martineau.

12) Fix r8169 data corruptions on RTL8402 chips, from Heiner Kallweit.

13) Don't free command entries in mlx5 while comp handler could still be
    running, from Eran Ben Elisha.

14) Error flow of request_irq() in mlx5 is busted, due to an off by one
    we try to free and IRQ never allocated. From Maor Gottlieb.

15) Fix leak when dumping netlink policies, from Johannes Berg.

16) Sendpage cannot be performed when a page is a slab page, or the page
    count is < 1. Some subsystems such as nvme were doing so. Create a
    "sendpage_ok()" helper and use it as needed, from Coly Li.

17) Don't leak request socket when using syncookes with mptcp, from
    Paolo Abeni.

* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (111 commits)
  net/core: check length before updating Ethertype in skb_mpls_{push,pop}
  net: mvneta: fix double free of txq->buf
  net_sched: check error pointer in tcf_dump_walker()
  net: team: fix memory leak in __team_options_register
  net: typhoon: Fix a typo Typoon --> Typhoon
  net: hinic: fix DEVLINK build errors
  net: stmmac: Modify configuration method of EEE timers
  tcp: fix syn cookied MPTCP request socket leak
  libceph: use sendpage_ok() in ceph_tcp_sendpage()
  scsi: libiscsi: use sendpage_ok() in iscsi_tcp_segment_map()
  drbd: code cleanup by using sendpage_ok() to check page for kernel_sendpage()
  tcp: use sendpage_ok() to detect misused .sendpage
  nvme-tcp: check page by sendpage_ok() before calling kernel_sendpage()
  net: add WARN_ONCE in kernel_sendpage() for improper zero-copy send
  net: introduce helper sendpage_ok() in include/linux/net.h
  net: usb: pegasus: Proper error handing when setting pegasus' MAC address
  net: core: document two new elements of struct net_device
  netlink: fix policy dump leak
  net/mlx5e: Fix race condition on nhe->n pointer in neigh update
  net/mlx5e: Fix VLAN create flow
  ...
2020-10-05 11:27:14 -07:00
Coly Li 7d4194abfc nvme-tcp: check page by sendpage_ok() before calling kernel_sendpage()
Currently nvme_tcp_try_send_data() doesn't use kernel_sendpage() to
send slab pages. But for pages allocated by __get_free_pages() without
__GFP_COMP, which also have refcount as 0, they are still sent by
kernel_sendpage() to remote end, this is problematic.

The new introduced helper sendpage_ok() checks both PageSlab tag and
page_count counter, and returns true if the checking page is OK to be
sent by kernel_sendpage().

This patch fixes the page checking issue of nvme_tcp_try_send_data()
with sendpage_ok(). If sendpage_ok() returns true, send this page by
kernel_sendpage(), otherwise use sock_no_sendpage to handle this page.

Signed-off-by: Coly Li <colyli@suse.de>
Cc: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Jan Kara <jack@suse.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Mikhail Skorzhinskii <mskorzhinskiy@solarflare.com>
Cc: Philipp Reisner <philipp.reisner@linbit.com>
Cc: Sagi Grimberg <sagi@grimberg.me>
Cc: Vlastimil Babka <vbabka@suse.com>
Cc: stable@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-02 15:27:08 -07:00
Jeffle Xu 21cc2f3f79 nvme-pci: allocate separate interrupt for the reserved non-polled I/O queue
One queue will be reserved for non-polled IO when nvme.poll_queues is
greater or equal than the number of IO queues that the nvme controller
can provide. Currently the reserved queue for non-polled IO will reuse
the interrupt used by admin queue in this case, e.g, vector 0.

This can work and the performance may not be an issue since the admin
queue is used unfrequently. However this behaviour may be inconsistent
with that when nvme.poll_queues is smaller than the number of IO
queues available.

Thus allocate separate interrupt for this reserved queue, and thus make
the behaviour consistent.

Signed-off-by: Jeffle Xu <jefflexu@linux.alibaba.com>
[hch: minor cleanups, mostly to the pre-existing surrounding code]
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-09-27 09:14:19 +02:00
Christoph Hellwig 936fab503f nvme: fix error handling in nvme_ns_report_zones
nvme_submit_sync_cmd can return positive NVMe error codes in addition to
the negative Linux error code, which are currently ignored.  Fix this
by removing __nvme_ns_report_zones and handling the errors from
nvme_submit_sync_cmd in the caller instead of multiplexing the return
value and the number of zones reported into a single return value.

Fixes: 240e6ee272 ("nvme: support for zoned namespaces")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
2020-09-27 09:14:19 +02:00
James Smart ddd3d10517 nvmet-fc: fix missing check for no hostport struct
A hostport port pointer is allowed to be NULL as it is not allocated if
the lldd does not support the new interfaces for NVME LS request support.
The hostport free routine validates the handle but forgot to validate the
hostport pointer.

Validate the hostport pointer before using it to validate the handle.

Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-09-27 09:14:19 +02:00
Chaitanya Kulkarni 5b3356d9da nvmet: add passthru ZNS support
In the default passthru implementation NVMeOF target passthru ctrl is
not capable of handling Zoned Namespaces (ZNS).

Update the nvmet_parse_pasthru_admin_cmd() to allow
NVME_ID_CNS_CS_CTRL/NVME_CIS_ZNS and NVME_ID_CNS_CS_NS/NVME_CIS_ZNS.

With this addition NVMeOF Passthru allows Zoned Namespaces.

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-09-27 09:14:19 +02:00
Amit Engel 4e683c48db nvmet: handle keep-alive timer when kato is modified by a set features cmd
A user may modify the kato by a set features cmd.  To properly deal
with races or a kato value of 0 (no keep alive enabled) change
nvmet_set_feat_kato to first disable the timer, then set the value
and then re-enable the timer.

Signed-off-by: Amit Engel <amit.engel@dell.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-09-27 09:14:19 +02:00
Mark Wunderlich f7790e5de9 nvmet-tcp: have queue io_work context run on sock incoming cpu
No real good need to spread queues artificially. Usually the
target will serve multiple hosts, and it's better to run on the socket
incoming cpu for better affinitization rather than spread queues on all
online cpus.

We rely on RSS to spread the work around sufficiently.

Signed-off-by: Mark Wunderlich <mark.wunderlich@intel.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-09-27 09:14:18 +02:00
Andy Shevchenko 0b85f59d30 nvme-pci: Move enumeration by class to be last in the table
It's unusual that we have enumeration by class in the middle of the table.
It might potentially be problematic in the future if we add another entry
after it.

So, move class matching entry to be the last in the ID table.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-09-27 09:14:18 +02:00
Chaitanya Kulkarni 1cf7a12e09 nvme: use an xarray to lookup the Commands Supported and Effects log
When using linked list we have to open code the locking, search, and
destroy operations with the loops even if data structure doesn't fall
into the fast path.

One of the main advantage of having XArray to store, search, and remove
items is that it handles all the locking by itself, avoids the loops
when using linked lists, provides clear API to replace the linked list's
search and destroy loops.

This patch replaces the ctrl->cel list with XArray and removes :-

a. Extra code needed for the linked list for ctrl->cel item management
   such as nvme_find_cel().
b. Destroy loop in the nvme_free_ctrl().
c. Explicit insertion locking in the nvme_get_effects_log().

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-09-27 09:14:18 +02:00
Chaitanya Kulkarni b2702aaaa4 nvme: lift the file open code from nvme_ctrl_get_by_path
Lift opening the file open/close code from nvme_ctrl_get_by_path into
the caller, just keeping a simple nvme_ctrl_from_file() helper.

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
[hch: refactored a bit, split the bug fixes into a separate prep patch]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
2020-09-27 09:14:18 +02:00
Linus Torvalds 9d2fbaefb3 block-5.9-2020-09-25
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Merge tag 'block-5.9-2020-09-25' of git://git.kernel.dk/linux-block

Pull block fixes from Jens Axboe:
 "NVMe pull request from Christoph, and removal of a dead define.

   - fix error during controller probe that cause double free irqs
     (Keith Busch)

   - FC connection establishment fix (James Smart)

   - properly handle completions for invalid tags (Xianting Tian)

   - pass the correct nsid to the command effects and supported log
     (Chaitanya Kulkarni)"

* tag 'block-5.9-2020-09-25' of git://git.kernel.dk/linux-block:
  block: remove unused BLK_QC_T_EAGAIN flag
  nvme-core: don't use NVME_NSID_ALL for command effects and supported log
  nvme-fc: fail new connections to a deleted host or remote port
  nvme-pci: fix NULL req in completion handler
  nvme: return errors for hwmon init
2020-09-26 11:07:36 -07:00
Jens Axboe ac8f7a0264 Merge branch 'for-5.10/block' into for-5.10/drivers
* for-5.10/block: (140 commits)
  bdi: replace BDI_CAP_NO_{WRITEBACK,ACCT_DIRTY} with a single flag
  bdi: invert BDI_CAP_NO_ACCT_WB
  bdi: replace BDI_CAP_STABLE_WRITES with a queue and a sb flag
  mm: use SWP_SYNCHRONOUS_IO more intelligently
  bdi: remove BDI_CAP_SYNCHRONOUS_IO
  bdi: remove BDI_CAP_CGROUP_WRITEBACK
  block: lift setting the readahead size into the block layer
  md: update the optimal I/O size on reshape
  bdi: initialize ->ra_pages and ->io_pages in bdi_init
  aoe: set an optimal I/O size
  bcache: inherit the optimal I/O size
  drbd: remove dead code in device_to_statistics
  fs: remove the unused SB_I_MULTIROOT flag
  block: mark blkdev_get static
  PM: mm: cleanup swsusp_swap_check
  mm: split swap_type_of
  PM: rewrite is_hibernate_resume_dev to not require an inode
  mm: cleanup claim_swapfile
  ocfs2: cleanup o2hb_region_dev_store
  dasd: cleanup dasd_scan_partitions
  ...
2020-09-24 13:44:39 -06:00
Christoph Hellwig 1cb039f3dc bdi: replace BDI_CAP_STABLE_WRITES with a queue and a sb flag
The BDI_CAP_STABLE_WRITES is one of the few bits of information in the
backing_dev_info shared between the block drivers and the writeback code.
To help untangling the dependency replace it with a queue flag and a
superblock flag derived from it.  This also helps with the case of e.g.
a file system requiring stable writes due to its own checksumming, but
not forcing it on other users of the block device like the swap code.

One downside is that we an't support the stable_pages_required bdi
attribute in sysfs anymore.  It is replaced with a queue attribute which
also is writable for easier testing.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-09-24 13:43:39 -06:00
Christoph Hellwig c2e4cd57cf block: lift setting the readahead size into the block layer
Drivers shouldn't really mess with the readahead size, as that is a VM
concept.  Instead set it based on the optimal I/O size by lifting the
algorithm from the md driver when registering the disk.  Also set
bdi->io_pages there as well by applying the same scheme based on
max_sectors.  To ensure the limits work well for stacking drivers a
new helper is added to update the readahead limits from the block
limits, which is also called from disk_stack_limits.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Mike Snitzer <snitzer@redhat.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-09-24 13:43:39 -06:00
Chaitanya Kulkarni 46d2613eae nvme-core: don't use NVME_NSID_ALL for command effects and supported log
In the function nvme_get_effects_log() it uses NVME_NSID_ALL which has
namespace scope. The command effect log page is controller specific.

Replace NVME_NSID_ALL with 0x00 which specifies the controller scope
instead of namespace scope.

Fixes: 84fef62d13 ("nvme: check admin passthru command effects")
Link: https://bugzilla.kernel.org/show_bug.cgi?id=209287
Reported-by: Huai-Cheng Kuo <hh81478072@gmail.com>
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-09-23 20:01:47 +02:00
Linus Torvalds c37b718922 block-5.9-2020-09-22
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Merge tag 'block-5.9-2020-09-22' of git://git.kernel.dk/linux-block

Pull block fixes from Jens Axboe:
 "A few NVMe fixes, and a dasd write zero fix"

* tag 'block-5.9-2020-09-22' of git://git.kernel.dk/linux-block:
  nvmet: get transport reference for passthru ctrl
  nvme-core: get/put ctrl and transport module in nvme_dev_open/release()
  nvme-tcp: fix kconfig dependency warning when !CRYPTO
  nvme-pci: disable the write zeros command for Intel 600P/P3100
  s390/dasd: Fix zero write for FBA devices
2020-09-22 14:31:38 -07:00
James Smart 9e0e8dac98 nvme-fc: fail new connections to a deleted host or remote port
The lldd may have made calls to delete a remote port or local port and
the delete is in progress when the cli then attempts to create a new
controller. Currently, this proceeds without error although it can't be
very successful.

Fix this by validating that both the host port and remote port are
present when a new controller is to be created.

Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-09-22 17:49:55 +02:00
Xianting Tian 50b7c24390 nvme-pci: fix NULL req in completion handler
Currently, we use nvmeq->q_depth as the upper limit for a valid tag in
nvme_handle_cqe(), it is not correct. Because the available tag number
is recorded in tagset, which is not equal to nvmeq->q_depth.

The nvme driver registers interrupts for queues before initializing the
tagset, because it uses the number of successful request_irq() calls to
configure the tagset parameters. This allows a race condition with the
current tag validity check if the controller happens to produce an
interrupt with a corrupted CQE before the tagset is initialized.

Replace the driver's indirect tag check with the one already provided by
the block layer.

Signed-off-by: Xianting Tian <tian.xianting@h3c.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-09-22 17:49:55 +02:00
Keith Busch 59e330f8ff nvme: return errors for hwmon init
Initializing the nvme hwmon retrieves a log from the controller. If the
controller is broken, we need to return the appropriate error so that
subsequent initialization doesn't attempt to continue.

Reported-by: Tong Zhang <ztong0001@gmail.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-09-22 17:49:55 +02:00
Christoph Hellwig 3a6b076168 nvmet: get transport reference for passthru ctrl
Grab a reference to the transport driver to ensure it can't be unloaded
while a passthrough controller is active.

Fixes: c1fef73f79 ("nvmet: add passthru code to process commands")
Reported-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
2020-09-17 10:36:25 +02:00
Chaitanya Kulkarni 52a3974feb nvme-core: get/put ctrl and transport module in nvme_dev_open/release()
Get and put the reference to the ctrl in the nvme_dev_open() and
nvme_dev_release() before and after module get/put for ctrl in char
device file operations.

Introduce char_dev relase function, get/put the controller and module
which allows us to fix the potential Oops which can be easily reproduced
with a passthru ctrl (although the problem also exists with pure user
access):

Entering kdb (current=0xffff8887f8290000, pid 3128) on processor 30 Oops: (null)
due to oops @ 0xffffffffa01019ad
CPU: 30 PID: 3128 Comm: bash Tainted: G        W  OE     5.8.0-rc4nvme-5.9+ #35
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.4
RIP: 0010:nvme_free_ctrl+0x234/0x285 [nvme_core]
Code: 57 10 a0 e8 73 bf 02 e1 ba 3d 11 00 00 48 c7 c6 98 33 10 a0 48 c7 c7 1d 57 10 a0 e8 5b bf 02 e1 8
RSP: 0018:ffffc90001d63de0 EFLAGS: 00010246
RAX: ffffffffa05c0440 RBX: ffff8888119e45a0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff8888177e9550 RDI: ffff8888119e43b0
RBP: ffff8887d4768000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: ffffc90001d63c90 R12: ffff8888119e43b0
R13: ffff8888119e5108 R14: dead000000000100 R15: ffff8888119e5108
FS:  00007f1ef27b0740(0000) GS:ffff888817600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffa05c0470 CR3: 00000007f6bee000 CR4: 00000000003406e0
Call Trace:
 device_release+0x27/0x80
 kobject_put+0x98/0x170
 nvmet_passthru_ctrl_disable+0x4a/0x70 [nvmet]
 nvmet_passthru_enable_store+0x4c/0x90 [nvmet]
 configfs_write_file+0xe6/0x150
 vfs_write+0xba/0x1e0
 ksys_write+0x5f/0xe0
 do_syscall_64+0x52/0xb0
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f1ef1eb2840
Code: Bad RIP value.
RSP: 002b:00007fffdbff0eb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f1ef1eb2840
RDX: 0000000000000002 RSI: 00007f1ef27d2000 RDI: 0000000000000001
RBP: 00007f1ef27d2000 R08: 000000000000000a R09: 00007f1ef27b0740
R10: 0000000000000001 R11: 0000000000000246 R12: 00007f1ef2186400
R13: 0000000000000002 R14: 0000000000000001 R15: 0000000000000000

With this patch fix we take the module ref count in nvme_dev_open() and
release that ref count in newly introduced nvme_dev_release().

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-09-17 10:34:25 +02:00
Necip Fazil Yildiran af5ad17854 nvme-tcp: fix kconfig dependency warning when !CRYPTO
When NVME_TCP is enabled and CRYPTO is disabled, it results in the
following Kbuild warning:

WARNING: unmet direct dependencies detected for CRYPTO_CRC32C
  Depends on [n]: CRYPTO [=n]
  Selected by [y]:
  - NVME_TCP [=y] && INET [=y] && BLK_DEV_NVME [=y]

The reason is that NVME_TCP selects CRYPTO_CRC32C without depending on or
selecting CRYPTO while CRYPTO_CRC32C is subordinate to CRYPTO.

Honor the kconfig menu hierarchy to remove kconfig dependency warnings.

Fixes: 79fd751d61 ("nvme: tcp: selects CRYPTO_CRC32C for nvme-tcp")
Signed-off-by: Necip Fazil Yildiran <fazilyildiran@gmail.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-09-15 07:58:49 +02:00
David Milburn ce4cc3133d nvme-pci: disable the write zeros command for Intel 600P/P3100
The write zeros command does not work with 4k range.

bash-4.4# ./blkdiscard /dev/nvme0n1p2
bash-4.4# strace -efallocate xfs_io -c "fzero 536895488 2048" /dev/nvme0n1p2
fallocate(3, FALLOC_FL_ZERO_RANGE, 536895488, 2048) = 0
+++ exited with 0 +++
bash-4.4# dd bs=1 if=/dev/nvme0n1p2 skip=536895488 count=512 | hexdump -C
00000000  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
*
00000200

bash-4.4# ./blkdiscard /dev/nvme0n1p2
bash-4.4# strace -efallocate xfs_io -c "fzero 536895488 4096" /dev/nvme0n1p2
fallocate(3, FALLOC_FL_ZERO_RANGE, 536895488, 4096) = 0
+++ exited with 0 +++
bash-4.4# dd bs=1 if=/dev/nvme0n1p2 skip=536895488 count=512 | hexdump -C
00000000  5c 61 5c b0 96 21 1b 5e  85 0c 07 32 9c 8c eb 3c  |\a\..!.^...2...<|
00000010  4a a2 06 ca 67 15 2d 8e  29 8d a8 a0 7e 46 8c 62  |J...g.-.)...~F.b|
00000020  bb 4c 6c c1 6b f5 ae a5  e4 a9 bc 93 4f 60 ff 7a  |.Ll.k.......O`.z|

Reported-by: Eric Sandeen <esandeen@redhat.com>
Signed-off-by: David Milburn <dmilburn@redhat.com>
Tested-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-09-15 07:58:43 +02:00
Linus Torvalds 7b8731d958 - Fix a regression in bdev partition locking (Christoph)
- NVMe pull request from Christoph:
 	- cancel async events before freeing them (David Milburn)
 	- revert a broken race fix (James Smart)
 	- fix command processing during resets (Sagi Grimberg)
 
 - Fix a kyber crash with requeued flushes (Omar)
 
 - Fix __bio_try_merge_page() same_page error for no merging (Ritesh)
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Merge tag 'block-5.9-2020-09-11' of git://git.kernel.dk/linux-block

Pull block fixes from Jens Axboe:

 - Fix a regression in bdev partition locking (Christoph)

 - NVMe pull request from Christoph:
      - cancel async events before freeing them (David Milburn)
      - revert a broken race fix (James Smart)
      - fix command processing during resets (Sagi Grimberg)

 - Fix a kyber crash with requeued flushes (Omar)

 - Fix __bio_try_merge_page() same_page error for no merging (Ritesh)

* tag 'block-5.9-2020-09-11' of git://git.kernel.dk/linux-block:
  block: Set same_page to false in __bio_try_merge_page if ret is false
  nvme-fabrics: allow to queue requests for live queues
  block: only call sched requeue_request() for scheduled requests
  nvme-tcp: cancel async events before freeing event struct
  nvme-rdma: cancel async events before freeing event struct
  nvme-fc: cancel async events before freeing event struct
  nvme: Revert: Fix controller creation races with teardown flow
  block: restore a specific error code in bdev_del_partition
2020-09-11 11:55:28 -07:00
Sagi Grimberg 73a5379937 nvme-fabrics: allow to queue requests for live queues
Right now we are failing requests based on the controller state (which
is checked inline in nvmf_check_ready) however we should definitely
accept requests if the queue is live.

When entering controller reset, we transition the controller into
NVME_CTRL_RESETTING, and then return BLK_STS_RESOURCE for non-mpath
requests (have blk_noretry_request set).

This is also the case for NVME_REQ_USER for the wrong reason. There
shouldn't be any reason for us to reject this I/O in a controller reset.
We do want to prevent passthru commands on the admin queue because we
need the controller to fully initialize first before we let user passthru
admin commands to be issued.

In a non-mpath setup, this means that the requests will simply be
requeued over and over forever not allowing the q_usage_counter to drop
its final reference, causing controller reset to hang if running
concurrently with heavy I/O.

Fixes: 35897b920c ("nvme-fabrics: fix and refine state checks in __nvmf_check_ready")
Reviewed-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-09-09 08:00:50 +02:00
David Milburn ceb1e0874d nvme-tcp: cancel async events before freeing event struct
Cancel async event work in case async event has been queued up, and
nvme_tcp_submit_async_event() runs after event has been freed.

Signed-off-by: David Milburn <dmilburn@redhat.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-09-08 19:46:29 +02:00
David Milburn 925dd04c1f nvme-rdma: cancel async events before freeing event struct
Cancel async event work in case async event has been queued up, and
nvme_rdma_submit_async_event() runs after event has been freed.

Signed-off-by: David Milburn <dmilburn@redhat.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-09-08 19:46:29 +02:00
David Milburn e126e8210e nvme-fc: cancel async events before freeing event struct
Cancel async event work in case async event has been queued up, and
nvme_fc_submit_async_event() runs after event has been freed.

Signed-off-by: David Milburn <dmilburn@redhat.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-09-08 19:46:29 +02:00
James Smart b63de8400a nvme: Revert: Fix controller creation races with teardown flow
The indicated patch introduced a barrier in the sysfs_delete attribute
for the controller that rejects the request if the controller isn't
created. "Created" is defined as at least 1 call to nvme_start_ctrl().

This is problematic in error-injection testing.  If an error occurs on
the initial attempt to create an association and the controller enters
reconnect(s) attempts, the admin cannot delete the controller until
either there is a successful association created or ctrl_loss_tmo
times out.

Where this issue is particularly hurtful is when the "admin" is the
nvme-cli, it is performing a connection to a discovery controller, and
it is initiated via auto-connect scripts.  With the FC transport, if the
first connection attempt fails, the controller enters a normal reconnect
state but returns control to the cli thread that created the controller.
In this scenario, the cli attempts to read the discovery log via ioctl,
which fails, causing the cli to see it as an empty log and then proceeds
to delete the discovery controller. The delete is rejected and the
controller is left live. If the discovery controller reconnect then
succeeds, there is no action to delete it, and it sits live doing nothing.

Cc: <stable@vger.kernel.org> # v5.7+
Fixes: ce1518139e ("nvme: Fix controller creation races with teardown flow")
Signed-off-by: James Smart <james.smart@broadcom.com>
CC: Israel Rukshin <israelr@mellanox.com>
CC: Max Gurtovoy <maxg@mellanox.com>
CC: Christoph Hellwig <hch@lst.de>
CC: Keith Busch <kbusch@kernel.org>
CC: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-09-08 19:46:28 +02:00
Linus Torvalds 8075fc3b11 block-5.9-2020-09-04
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Merge tag 'block-5.9-2020-09-04' of git://git.kernel.dk/linux-block

Pull block fixes from Jens Axboe:
 "A bit larger than usual this week, mostly due to the NVMe fixes
  arriving late for -rc3 and hence didn't make last weeks pull request.

   - NVMe:
        - instance leak and io boundary fixes from Keith
        - fc locking fix from Christophe
        - various tcp/rdma reset during traffic fixes from Sagi
        - pci use-after-free fix from Tong
        - tcp target null deref fix from Ziye

   - Locking fix for partition removal (Christoph)

   - Ensure bdi->io_pages is always set (me)

   - Fixup for hd struct reference (Ming)

   - Fix for zero length bvecs (Ming)

   - Two small blk-iocost fixes (Tejun)"

* tag 'block-5.9-2020-09-04' of git://git.kernel.dk/linux-block:
  block: allow for_each_bvec to support zero len bvec
  blk-stat: make q->stats->lock irqsafe
  blk-iocost: ioc_pd_free() shouldn't assume irq disabled
  block: fix locking in bdev_del_partition
  block: release disk reference in hd_struct_free_work
  block: ensure bdi->io_pages is always initialized
  nvme-pci: cancel nvme device request before disabling
  nvme: only use power of two io boundaries
  nvme: fix controller instance leak
  nvmet-fc: Fix a missed _irqsave version of spin_lock in 'nvmet_fc_fod_op_done()'
  nvme: Fix NULL dereference for pci nvme controllers
  nvme-rdma: fix reset hang if controller died in the middle of a reset
  nvme-rdma: fix timeout handler
  nvme-rdma: serialize controller teardown sequences
  nvme-tcp: fix reset hang if controller died in the middle of a reset
  nvme-tcp: fix timeout handler
  nvme-tcp: serialize controller teardown sequences
  nvme: have nvme_wait_freeze_timeout return if it timed out
  nvme-fabrics: don't check state NVME_CTRL_NEW for request acceptance
  nvmet-tcp: Fix NULL dereference when a connect data comes in h2cdata pdu
2020-09-04 13:04:51 -07:00
Christoph Hellwig b55d3d21a0 nvme: opencode revalidate_disk in nvme_validate_ns
Keep control in the NVMe driver instead of going through an indirect
call back into ->revalidate_disk.  Also reorder the function a bit to be
easier to follow with the additional code.

And now that we have removed all callers of revalidate_disk() in the nvme
code, ->revalidate_disk is only called from the open code when first
opening the device.  Which is of course totally pointless as we have
a valid size since the initial scan, and will get an updated view
through the asynchronous notifiation everytime the size changes.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-09-02 08:00:07 -06:00
Christoph Hellwig c13f0fbc4c nvme: don't call revalidate_disk from nvme_set_queue_dying
In nvme_set_queue_dying we really just want to ensure the disk and bdev
sizes are set to zero.  Going through revalidate_disk leads to a somewhat
arcance and complex callchain relying on special behavior in a few
places.  Instead just lift the set_capacity directly to
nvme_set_queue_dying, and rename and move the nvme_mpath_update_disk_size
helper so that we can use it in nvme_set_queue_dying to propagate the
size to the bdev without detours.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-09-01 16:49:25 -06:00
Christoph Hellwig 611bee526b block: replace bd_set_size with bd_set_nr_sectors
Replace bd_set_size with a version that takes the number of sectors
instead, as that fits most of the current and future callers much better.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-09-01 16:49:25 -06:00
Jens Axboe a98278ecfb Merge branch 'block-5.9' into for-5.10/block
* block-5.9:
  blk-stat: make q->stats->lock irqsafe
  blk-iocost: ioc_pd_free() shouldn't assume irq disabled
  block: fix locking in bdev_del_partition
  block: release disk reference in hd_struct_free_work
  block: ensure bdi->io_pages is always initialized
  nvme-pci: cancel nvme device request before disabling
  nvme: only use power of two io boundaries
  nvme: fix controller instance leak
  nvmet-fc: Fix a missed _irqsave version of spin_lock in 'nvmet_fc_fod_op_done()'
  nvme: Fix NULL dereference for pci nvme controllers
  nvme-rdma: fix reset hang if controller died in the middle of a reset
  nvme-rdma: fix timeout handler
  nvme-rdma: serialize controller teardown sequences
  nvme-tcp: fix reset hang if controller died in the middle of a reset
  nvme-tcp: fix timeout handler
  nvme-tcp: serialize controller teardown sequences
  nvme: have nvme_wait_freeze_timeout return if it timed out
  nvme-fabrics: don't check state NVME_CTRL_NEW for request acceptance
  nvmet-tcp: Fix NULL dereference when a connect data comes in h2cdata pdu
2020-09-01 16:49:20 -06:00
Tong Zhang 7ad92f656b nvme-pci: cancel nvme device request before disabling
This patch addresses an irq free warning and null pointer dereference
error problem when nvme devices got timeout error during initialization.
This problem happens when nvme_timeout() function is called while
nvme_reset_work() is still in execution. This patch fixed the problem by
setting flag of the problematic request to NVME_REQ_CANCELLED before
calling nvme_dev_disable() to make sure __nvme_submit_sync_cmd() returns
an error code and let nvme_submit_sync_cmd() fail gracefully.
The following is console output.

[   62.472097] nvme nvme0: I/O 13 QID 0 timeout, disable controller
[   62.488796] nvme nvme0: could not set timestamp (881)
[   62.494888] ------------[ cut here ]------------
[   62.495142] Trying to free already-free IRQ 11
[   62.495366] WARNING: CPU: 0 PID: 7 at kernel/irq/manage.c:1751 free_irq+0x1f7/0x370
[   62.495742] Modules linked in:
[   62.495902] CPU: 0 PID: 7 Comm: kworker/u4:0 Not tainted 5.8.0+ #8
[   62.496206] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.13.0-48-gd9c812dda519-p4
[   62.496772] Workqueue: nvme-reset-wq nvme_reset_work
[   62.497019] RIP: 0010:free_irq+0x1f7/0x370
[   62.497223] Code: e8 ce 49 11 00 48 83 c4 08 4c 89 e0 5b 5d 41 5c 41 5d 41 5e 41 5f c3 44 89 f6 48 c70
[   62.498133] RSP: 0000:ffffa96800043d40 EFLAGS: 00010086
[   62.498391] RAX: 0000000000000000 RBX: ffff9b87fc458400 RCX: 0000000000000000
[   62.498741] RDX: 0000000000000001 RSI: 0000000000000096 RDI: ffffffff9693d72c
[   62.499091] RBP: ffff9b87fd4c8f60 R08: ffffa96800043bfd R09: 0000000000000163
[   62.499440] R10: ffffa96800043bf8 R11: ffffa96800043bfd R12: ffff9b87fd4c8e00
[   62.499790] R13: ffff9b87fd4c8ea4 R14: 000000000000000b R15: ffff9b87fd76b000
[   62.500140] FS:  0000000000000000(0000) GS:ffff9b87fdc00000(0000) knlGS:0000000000000000
[   62.500534] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   62.500816] CR2: 0000000000000000 CR3: 000000003aa0a000 CR4: 00000000000006f0
[   62.501165] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   62.501515] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   62.501864] Call Trace:
[   62.501993]  pci_free_irq+0x13/0x20
[   62.502167]  nvme_reset_work+0x5d0/0x12a0
[   62.502369]  ? update_load_avg+0x59/0x580
[   62.502569]  ? ttwu_queue_wakelist+0xa8/0xc0
[   62.502780]  ? try_to_wake_up+0x1a2/0x450
[   62.502979]  process_one_work+0x1d2/0x390
[   62.503179]  worker_thread+0x45/0x3b0
[   62.503361]  ? process_one_work+0x390/0x390
[   62.503568]  kthread+0xf9/0x130
[   62.503726]  ? kthread_park+0x80/0x80
[   62.503911]  ret_from_fork+0x22/0x30
[   62.504090] ---[ end trace de9ed4a70f8d71e2 ]---
[  123.912275] nvme nvme0: I/O 12 QID 0 timeout, disable controller
[  123.914670] nvme nvme0: 1/0/0 default/read/poll queues
[  123.916310] BUG: kernel NULL pointer dereference, address: 0000000000000000
[  123.917469] #PF: supervisor write access in kernel mode
[  123.917725] #PF: error_code(0x0002) - not-present page
[  123.917976] PGD 0 P4D 0
[  123.918109] Oops: 0002 [#1] SMP PTI
[  123.918283] CPU: 0 PID: 7 Comm: kworker/u4:0 Tainted: G        W         5.8.0+ #8
[  123.918650] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.13.0-48-gd9c812dda519-p4
[  123.919219] Workqueue: nvme-reset-wq nvme_reset_work
[  123.919469] RIP: 0010:__blk_mq_alloc_map_and_request+0x21/0x80
[  123.919757] Code: 66 0f 1f 84 00 00 00 00 00 41 55 41 54 55 48 63 ee 53 48 8b 47 68 89 ee 48 89 fb 8b4
[  123.920657] RSP: 0000:ffffa96800043d40 EFLAGS: 00010286
[  123.920912] RAX: ffff9b87fc4fee40 RBX: ffff9b87fc8cb008 RCX: 0000000000000000
[  123.921258] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff9b87fc618000
[  123.921602] RBP: 0000000000000000 R08: ffff9b87fdc2c4a0 R09: ffff9b87fc616000
[  123.921949] R10: 0000000000000000 R11: ffff9b87fffd1500 R12: 0000000000000000
[  123.922295] R13: 0000000000000000 R14: ffff9b87fc8cb200 R15: ffff9b87fc8cb000
[  123.922641] FS:  0000000000000000(0000) GS:ffff9b87fdc00000(0000) knlGS:0000000000000000
[  123.923032] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  123.923312] CR2: 0000000000000000 CR3: 000000003aa0a000 CR4: 00000000000006f0
[  123.923660] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  123.924007] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  123.924353] Call Trace:
[  123.924479]  blk_mq_alloc_tag_set+0x137/0x2a0
[  123.924694]  nvme_reset_work+0xed6/0x12a0
[  123.924898]  process_one_work+0x1d2/0x390
[  123.925099]  worker_thread+0x45/0x3b0
[  123.925280]  ? process_one_work+0x390/0x390
[  123.925486]  kthread+0xf9/0x130
[  123.925642]  ? kthread_park+0x80/0x80
[  123.925825]  ret_from_fork+0x22/0x30
[  123.926004] Modules linked in:
[  123.926158] CR2: 0000000000000000
[  123.926322] ---[ end trace de9ed4a70f8d71e3 ]---
[  123.926549] RIP: 0010:__blk_mq_alloc_map_and_request+0x21/0x80
[  123.926832] Code: 66 0f 1f 84 00 00 00 00 00 41 55 41 54 55 48 63 ee 53 48 8b 47 68 89 ee 48 89 fb 8b4
[  123.927734] RSP: 0000:ffffa96800043d40 EFLAGS: 00010286
[  123.927989] RAX: ffff9b87fc4fee40 RBX: ffff9b87fc8cb008 RCX: 0000000000000000
[  123.928336] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff9b87fc618000
[  123.928679] RBP: 0000000000000000 R08: ffff9b87fdc2c4a0 R09: ffff9b87fc616000
[  123.929025] R10: 0000000000000000 R11: ffff9b87fffd1500 R12: 0000000000000000
[  123.929370] R13: 0000000000000000 R14: ffff9b87fc8cb200 R15: ffff9b87fc8cb000
[  123.929715] FS:  0000000000000000(0000) GS:ffff9b87fdc00000(0000) knlGS:0000000000000000
[  123.930106] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  123.930384] CR2: 0000000000000000 CR3: 000000003aa0a000 CR4: 00000000000006f0
[  123.930731] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  123.931077] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Co-developed-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Tong Zhang <ztong0001@gmail.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
2020-08-28 16:43:57 -07:00
Keith Busch e83d776f9f nvme: only use power of two io boundaries
The kernel requires a power of two for boundaries because that's the
only way it can efficiently split commands that cross them. A
controller, however, may report a non-power of two boundary.

The driver had been rounding the controller's value to one the kernel
can use, but splitting on the wrong boundary provides no benefit on the
device side, and incurs additional submission overhead from non-optimal
splits.

Don't provide any boundary hint if the controller's value can't be used
and log a warning when first scanning a disk's unreported IO boundary.
Since the chunk sector logic has grown, move it to a separate function.

Cc: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
2020-08-28 16:43:57 -07:00
Keith Busch 192f6c29bb nvme: fix controller instance leak
If the driver has to unbind from the controller for an early failure
before the subsystem has been set up, there won't be a subsystem holding
the controller's instance, so the controller needs to free its own
instance in this case.

Fixes: 733e4b69d5 ("nvme: Assign subsys instance from first ctrl")
Signed-off-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
2020-08-28 16:43:57 -07:00
Christophe JAILLET 70e37988db nvmet-fc: Fix a missed _irqsave version of spin_lock in 'nvmet_fc_fod_op_done()'
The way 'spin_lock()' and 'spin_lock_irqsave()' are used is not consistent
in this function.

Use 'spin_lock_irqsave()' also here, as there is no guarantee that
interruptions are disabled at that point, according to surrounding code.

Fixes: a97ec51b37 ("nvmet_fc: Rework target side abort handling")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
2020-08-28 16:43:57 -07:00
Sagi Grimberg 7cd49f7576 nvme: Fix NULL dereference for pci nvme controllers
PCIe controllers do not have fabric opts, verify they exist before
showing ctrl_loss_tmo or reconnect_delay attributes.

Fixes: 764075fdcb ("nvme: expose reconnect_delay and ctrl_loss_tmo via sysfs")
Reported-by: Tobias Markus <tobias@markus-regensburg.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
2020-08-28 16:43:57 -07:00
Sagi Grimberg 2362acb678 nvme-rdma: fix reset hang if controller died in the middle of a reset
If the controller becomes unresponsive in the middle of a reset, we
will hang because we are waiting for the freeze to complete, but that
cannot happen since we have commands that are inflight holding the
q_usage_counter, and we can't blindly fail requests that times out.

So give a timeout and if we cannot wait for queue freeze before
unfreezing, fail and have the error handling take care how to
proceed (either schedule a reconnect of remove the controller).

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
2020-08-28 16:43:57 -07:00