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nvmet_rdma_install_queue() is driven from the ->io_work workqueue
function, but will call flush_workqueue() which might trigger
->release_work() which in itself calls flush_work on ->io_work.
To avoid that check for pending queue in disconnecting status,
and return 'controller busy' when we reached a certain threshold.
Signed-off-by: Hannes Reinecke <hare@suse.de>
Tested-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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nvmet_tcp_install_queue() is driven from the ->io_work workqueue
function, but will call flush_workqueue() which might trigger
->release_work() which in itself calls flush_work on ->io_work.
To avoid that check for pending queue in disconnecting status,
and return 'controller busy' when we reached a certain threshold.
Signed-off-by: Hannes Reinecke <hare@suse.de>
Tested-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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During resets, if queues are unquiesced first, then the host can submit
IOs to the controller using shadow doorbell logic but the controller
won't be aware. This can lead to necessary MMIO doorbells from being
not issued, causing requests to be delayed and timed-out.
Signed-off-by: William Butler <wab@google.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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The nvmet_tcp_handle_h2c_data_pdu() function should take into
consideration the possibility that the header digest and/or the data
digests are enabled when calculating the expected PDU length, before
comparing it to the value stored in cmd->pdu_len.
Fixes: efa56305908b ("nvmet-tcp: Fix a kernel panic when host sends an invalid H2C PDU length")
Signed-off-by: Maurizio Lombardi <mlombard@redhat.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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Print the command_id along side blk-mq's tag to help match commands with
protocol wire traces and logs.
Signed-off-by: Max Gurtovoy <mgurtovoy@nvidia.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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Print the command_id along side blk-mq's tag to help match commands with
protocol wire traces and logs.
Signed-off-by: Max Gurtovoy <mgurtovoy@nvidia.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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Kernel configs don't necessarily have opcode decoding, and some opcodes
are not even decodable. It is still interesting for debugging SSD issues
to know what opcode is timing out, what request type it came from, and
the data size (if applicable).
Also print the command_id along side blk-mq's tag to help match commands
with protocol wire traces and firmware logs,
Reviewed-by: Max Gurtovoy <mgurtovoy@nvidia.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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A previous patch introduced a struct_group() in nvme_common_command to help
stringop fortification figure out the length of the fields, but one function
is not currently using them:
In file included from drivers/nvme/target/core.c:7:
In file included from include/linux/string.h:254:
include/linux/fortify-string.h:592:4: error: call to '__read_overflow2_field' declared with 'warning' attribute: detected read beyond size of field (2nd parameter); maybe use struct_group()? [-Werror,-Wattribute-warning]
__read_overflow2_field(q_size_field, size);
^
Change this one to use the correct field name to avoid the warning.
Fixes: 5c629dc9609dc ("nvme: use struct group for generic command dwords")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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An earlier patch had tried to address a warning about a string copy with
missing zero termination:
drivers/nvme/target/trace.h:52:3: warning: ‘strncpy’ specified bound 32 equals destination size [-Wstringop-truncation]
The new version causes a different warning with some compiler versions, notably
gcc-9 and gcc-10, and also misses the zero padding that was apparently done
intentionally in the original code:
drivers/nvme/target/trace.h:56:2: error: 'strncpy' specified bound depends on the length of the source argument [-Werror=stringop-overflow=]
Change it to use strscpy_pad() with the original length, which will give
a properly padded and zero-terminated string as well as avoiding the warning.
Fixes: d86481e924a7 ("nvmet: use min of device_path and disk len")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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We currently rely on gendisk's file operations (fops) to distinguish
between a namespace head (ns_head) and a regular namespace. To enhance
code readability, introduce a helper function.
Additionally, we must ensure that the device is not an ns_head before
calling nvme_get_ns_from_dev(). To enforce this, add a WARN_ON check
within the nvme_get_ns_from_dev().
Signed-off-by: Guixin Liu <kanie@linux.alibaba.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Liu Song <liusong@linux.alibaba.com>
[include fix: https://lore.kernel.org/oe-kbuild-all/202401031943.0N72Tkji-lkp@intel.com/]
Signed-off-by: Keith Busch <kbusch@kernel.org>
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SK Hynix BC901 drive write zero will cause Chromebook takes more than 20 mins to switch to developer mode
"disable write zeroes" can fix this issue and Sk Hynix has been verified.
Signed-off-by: Jim.Lin <jim.lin@siliconmotion.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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The remote port is removed too late from fcloop_nports list. Remove it
when port is unregistered.
This prevents a busy loop in fcloop_exit, because it is possible the
remote port is found in the list and thus we will never progress.
The kernel log will be spammed with
nvme_fcloop: fcloop_exit: Failed deleting remote port
nvme_fcloop: fcloop_exit: Failed deleting target port
Signed-off-by: Daniel Wagner <dwagner@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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The first command issued from the host to the target is the fabrics
connect command. At this point, neither the target queue nor the
controller have been allocated. But we already try to trace this command
in nvmet_req_init.
Reported by KASAN.
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Daniel Wagner <dwagner@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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There is no need for the bracket around the identifier. Remove it.
Signed-off-by: Daniel Wagner <dwagner@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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Just stash away the DMRL value in the nvme_ctrl struture, and leave
all interpretation to nvme_config_discard, where we know DSM is
supported by the time we're configuring the number of segments.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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ctrl->max_discard_sectors stores a value that is potentially based of
the DMRSL field in Identify Controller, which is in units of LBAs and
thus dependent on the Format of a namespace.
Fix this by moving the calculation of max_discard_sectors entirely
into nvme_config_discard and replacing the ctrl->max_discard_sectors
value with a local variable so that the calculation is always
namespace-specific.
Fixes: 1a86924e4f46 ("nvme: fix interpretation of DMRSL")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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Don't just skip the discard sectors and segments but also the granularity
if a value was already set before.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Max Gurtovoy <mgurtovoy@nvidia.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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Expeand the comment a bit to explain what is going on.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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No, a __le32 cast doesn't magically byteswap on big-endian systems..
Fixes: 70525e5d82f6 ("nvmet-tcp: peek icreq before starting TLS")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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There is no users for NVMF_AUTH_HASH_LEN macro.
Reviewed-by: Israel Rukshin <israelr@nvidia.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Max Gurtovoy <mgurtovoy@nvidia.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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There is no requirement to call nvme_tcp_free_queue() for queue
deallocation if the pskid is null or the queue allocation fails, as
the NVME_TCP_Q_ALLOCATED flag would not be set in such scenarios.
Signed-off-by: Guixin Liu <kanie@linux.alibaba.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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Simplify the nvmet_tcp_handle_h2c_data_pdu() function by removing
boilerplate code.
Signed-off-by: Maurizio Lombardi <mlombard@redhat.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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in nvmet_tcp_handle_h2c_data_pdu(), if the host sends a data_offset
different from rbytes_done, the driver ends up calling nvmet_req_complete()
passing a status error.
The problem is that at this point cmd->req is not yet initialized,
the kernel will crash after dereferencing a NULL pointer.
Fix the bug by replacing the call to nvmet_req_complete() with
nvmet_tcp_fatal_error().
Fixes: 872d26a391da ("nvmet-tcp: add NVMe over TCP target driver")
Reviewed-by: Keith Busch <kbsuch@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Maurizio Lombardi <mlombard@redhat.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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If the host sends an H2CData command with an invalid DATAL,
the kernel may crash in nvmet_tcp_build_pdu_iovec().
Unable to handle kernel NULL pointer dereference at
virtual address 0000000000000000
lr : nvmet_tcp_io_work+0x6ac/0x718 [nvmet_tcp]
Call trace:
process_one_work+0x174/0x3c8
worker_thread+0x2d0/0x3e8
kthread+0x104/0x110
Fix the bug by raising a fatal error if DATAL isn't coherent
with the packet size.
Also, the PDU length should never exceed the MAXH2CDATA parameter which
has been communicated to the host in nvmet_tcp_handle_icreq().
Fixes: 872d26a391da ("nvmet-tcp: add NVMe over TCP target driver")
Signed-off-by: Maurizio Lombardi <mlombard@redhat.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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The discard granularity now defaults to a single sector, so don't set
that value explicitly.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Richard Weinberger <richard@nod.at>
Link: https://lore.kernel.org/r/20231228075545.362768-10-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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The discard granularity now defaults to a single sector, so don't set
that value explicitly.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20231228075545.362768-9-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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The discard granularity now defaults to a single sector, so don't set
that value explicitly.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20231228075545.362768-8-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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The discard granularity now defaults to a single sector, so don't set
that value explicitly.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20231228075545.362768-7-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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The discard granularity now defaults to a single sector, so don't set
that value explicitly. Also don't bother clearing it as a discard
granularity without discard_sectors doesn't mean anything.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20231228075545.362768-6-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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The discard granularity now defaults to a single sector, so don't set
that value explicitly.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Richard Weinberger <richard@nod.at>
Link: https://lore.kernel.org/r/20231228075545.362768-5-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Current the discard granularity defaults to 0 and must be initialized by
any driver that wants to support discard. Default to the sector size
instead, which is the smallest possible value, and a very useful default.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20231228075545.362768-4-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Just like all block I/O, discards are in units of sectors. Thus setting a
smaller than sector size discard limit in case of > 512 byte sectors in
bcache doesn't make sense. Always set the discard granularity to 512
bytes instead.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20231228075545.362768-3-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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A zero discard_granularity is not treated the same as a single-block one,
and not having any segments after taking alignment is perfectly fine
and does not need a warning.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20231228075545.362768-2-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Give BLK_DEF_MAX_SECTORS a _CAP postfix and document what it is used for.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20231227092305.279567-5-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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BLK_DEF_MAX_SECTORS despite the confusing name is the default cap for
the max_sectors limits. Don't use it to initialize max_hw_setors, which
is a hardware / driver capacility.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20231227092305.279567-4-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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BLK_DEF_MAX_SECTORS despite the confusing name is the default cap for
the max_sectors limits. Don't use it to initialize max_hw_setors, which
is a hardware / driver capacility.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20231227092305.279567-3-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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null_blk has some rather odd capping of the max_hw_sectors value to
BLK_DEF_MAX_SECTORS, which doesn't make sense - max_hw_sector is the
hardware limit, and BLK_DEF_MAX_SECTORS despite the confusing name is the
default cap for the max_sectors field used for normal file system I/O.
Remove all the capping, and simply leave it to the block layer or
user to take up or not all of that for file system I/O.
Fixes: ea17fd354ca8 ("null_blk: Allow controlling max_hw_sectors limit")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20231227092305.279567-2-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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loop_set_status doesn't change anything relevant to the discard and
write_zeroes setting, so don't bother calling loop_config_discard.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20231227082020.249427-1-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Use the queue wide write back cache tracking insted of duplicating the
value in strut rq_wb.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20231226090747.204969-1-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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submit_bio_noacct allows completely invalid operations, or operations
that are not supported in the bio path. Extent the existing switch
statement to rejcect all invalid types.
Move the code point for REQ_OP_ZONE_APPEND so that it's not right in the
middle of the zone management operations and the switch statement can
follow the numerical order of the operations.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20231221070538.1112446-1-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Fix all kernel-doc warnings in drbd_actlog.c:
drbd_actlog.c:963: warning: No description found for return value of 'drbd_rs_begin_io'
drbd_actlog.c:1015: warning: Function parameter or member 'peer_device' not described in 'drbd_try_rs_begin_io'
drbd_actlog.c:1015: warning: Excess function parameter 'device' description in 'drbd_try_rs_begin_io'
drbd_actlog.c:1015: warning: No description found for return value of 'drbd_try_rs_begin_io'
drbd_actlog.c:1197: warning: No description found for return value of 'drbd_rs_del_all'
Fix one spelling error (s/ore/or/).
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Philipp Reisner <philipp.reisner@linbit.com>
Cc: Lars Ellenberg <lars.ellenberg@linbit.com>
Cc: Christoph Böhmwalder <christoph.boehmwalder@linbit.com>
Cc: <drbd-dev@lists.linbit.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: <linux-block@vger.kernel.org>
Link: https://lore.kernel.org/r/20231222061909.8791-1-rdunlap@infradead.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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commit 41fa722239b4 ("blk-mq: do not include passthrough requests in I/O
accounting")' disables I/O accounting for passthrough requests. Since tools
like 'iostat' do not show anything useful for passthrough I/O, it's
wasteful to do start/end time-stamping. So do away with that.
Avoiding the time-stamping improves the I/O performance by ~7%
Signed-off-by: Kundan Kumar <kundan.kumar@samsung.com>
Signed-off-by: Kanchan Joshi <joshi.k@samsung.com>
Link: https://lore.kernel.org/r/20231222101707.6921-1-kundan.kumar@samsung.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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for-6.8/block
Pull NVMe updates from Keith:
"nvme updates for Linux 6.8
- nvme fabrics spec updates (Guixin, Max)
- nvme target udpates (Guixin, Evan)
- nvme attribute refactoring (Daniel)
- nvme-fc numa fix (Keith)"
* tag 'nvme-6.8-2023-12-21' of git://git.infradead.org/nvme:
nvme-fc: set numa_node after nvme_init_ctrl
nvme-fabrics: don't check discovery ioccsz/iorcsz
nvmet: configfs: use ctrl->instance to track passthru subsystems
nvme: repack struct nvme_ns_head
nvme: add csi, ms and nuse to sysfs
nvme: rename ns attribute group
nvme: refactor ns info setup function
nvme: refactor ns info helpers
nvme: move ns id info to struct nvme_ns_head
nvmet: remove cntlid_min and cntlid_max check in nvmet_alloc_ctrl
nvmet: allow identical cntlid_min and cntlid_max settings
nvme-fabrics: check ioccsz and iorcsz
nvme: introduce nvme_check_ctrl_fabric_info helper
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nvme_init_ctrl() resets numa_node to NUMA_NO_NODE, so be sure to set the
desired value after that function call so it won't be overwritten.
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Max Gurtovoy <mgurtovoy@nvidia.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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IOCCSZ and IORCSZ are reserved for discovery controllers. Avoid checking
their values during identify controller phase.
Fixes: 2fcd3ab39826 ("nvme-fabrics: check ioccsz and iorcsz")
Reported-by: Daniel Wagner <dwagner@suse.de>
Tested-by: Daniel Wagner <dwagner@suse.de>
Signed-off-by: Max Gurtovoy <mgurtovoy@nvidia.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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A previous commit split disk_set_zoned(..., bool) into not taking an
argument for whether to set or clear, and instead added
disk_clear_zoned() as the counterpart. However, that commit neglected
to export the new symbol, causing failures for modular drivers that
used it.
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Fixes: d73e93b4dfab ("block: simplify disk_set_zoned")
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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disk_clear_zoned only needs to be called when a device reported zone
managed mode first and we clear it. Add a check so that disk_clear_zoned
isn't called on devices that were never zoned.
This avoids a fairly expensive queue freezing when revalidating
conventional devices.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20231217165359.604246-6-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Only use disk_set_zoned to actually enable zoned device support.
For clearing it, call disk_clear_zoned, which is renamed from
disk_clear_zone_settings and now directly clears the zoned flag as
well.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20231217165359.604246-5-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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When zones were first added the SCSI and ATA specs, two different
models were supported (in addition to the drive managed one that
is invisible to the host):
- host managed where non-conventional zones there is strict requirement
to write at the write pointer, or else an error is returned
- host aware where a write point is maintained if writes always happen
at it, otherwise it is left in an under-defined state and the
sequential write preferred zones behave like conventional zones
(probably very badly performing ones, though)
Not surprisingly this lukewarm model didn't prove to be very useful and
was finally removed from the ZBC and SBC specs (NVMe never implemented
it). Due to to the easily disappearing write pointer host software
could never rely on the write pointer to actually be useful for say
recovery.
Fortunately only a few HDD prototypes shipped using this model which
never made it to mass production. Drop the support before it is too
late. Note that any such host aware prototype HDD can still be used
with Linux as we'll now treat it as a conventional HDD.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20231217165359.604246-4-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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