| Age | Commit message (Collapse) | Author | Files | Lines |
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Add support for detecting capacity changes on nvmet blockdev and file
backed namespaces. This allows for emulating and testing online resizing
of nvme devices and filesystems on top.
Signed-off-by: Anthony Iliopoulos <ailiop@suse.com>
[chaitanya: Fix comments posted on V1]
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
[hch: reuse code a bit more]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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The kbuild tst robot flagged the following 3 issues:
Case 1)
>> drivers/nvme/target/fc.c:1201:37: warning: Either the condition
>> '!assoc' is redundant or there is possible null pointer dereference:
>> assoc. [nullPointerRedundantCheck]
>> struct nvmet_fc_tgtport *tgtport = assoc->tgtport;
^
>> drivers/nvme/target/fc.c:1853:7: note: Assuming that condition '!assoc'
>> is not redundant
>> if (!assoc)
^
>> drivers/nvme/target/fc.c:1850:37: note: Assignment
>> 'assoc=nvmet_fc_find_target_assoc(tgtport,be64_to_cpu(
>> rqst->associd.association_id))', assigned value is 0
>> assoc = nvmet_fc_find_target_assoc(tgtport,
^
>> drivers/nvme/target/fc.c:1896:31: note: Calling function
>> 'nvmet_fc_delete_target_assoc', 1st argument 'assoc' value is 0
>> nvmet_fc_delete_target_assoc(assoc);
^
The tool isn't smart enough to see that line 1854 sets a ret value which
thereafter causes the routine to exit. This occurs before any of the assoc
references, so it is not an issue. There are 2 more reportings of this
same failure.
To quiet the tool - rework the if test that does the exit to also
reference assoc. No change in logic otherwise.
Case 2)
drivers/nvme/target/fc.c:1202:29: warning: The scope of the variable
'queue' can be reduced. [variableScope]
struct nvmet_fc_tgt_queue *queue;
^
The tool is requesting the variable be declared within the code block
that utilizes it. Ignoring this report as existing code style is fine.
Case 3)
drivers/nvme/target/fc.c:1137:16: warning: Variable 'needrandom' is
assigned a value that is never used. [unreadVariable]
needrandom = true;
^
Another parsing issue with the tool. Given that parens were not used
with the list_for_each_entry() check, it inadvertantly thinks the
break exited the outer while loop not the inner for loop.
This is not an error. But, added parens to the inner list_for_each_entry()
to quiet the tool and as it is better coding style.
-- james
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reported-by: kbuild test robot <lkp@intel.com>
CC: kbuild test robot <lkp@intel.com>
CC: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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In order to save resource allocation and utilize the completion
locality in a better way (compared to SRQ per device that exist today),
allocate Shared Receive Queues (SRQs) per completion vector. Associate
each created QP/CQ with an appropriate SRQ according to the queue index.
This association will reduce the lock contention in the fast path
(compared to SRQ per device solution) and increase the locality in
memory buffers. Add new module parameter for SRQ size to adjust it
according to the expected load. User should make sure the size is >= 256
to avoid lack of resources. Also reduce the debug level of "last WQE
reached" event that is raised when a QP is using SRQ during destruction
process to relief the log.
Signed-off-by: Max Gurtovoy <maxg@mellanox.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Add support for performing LS requests from target to host.
Include sending request from targetport, reception into host,
host sending ls rsp.
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Currently nvmefc-loop only sends LS's from host to target.
Slightly rework data structures and routine names to reflect this
path. Allows a straight-forward conversion to be used by ls's
from target to host.
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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As part of FC-NVME-2 (and ammendment on FC-NVME), the target is to
send a Disconnect LS after an association is terminated and any
exchanges for the association have been ABTS'd. The target is also
not to send the receipt to any Disconnect Association LS, received
to initiate the association termination or received while the
association is terminating, until the Disconnect LS has been transmit.
Add support for sending Disconnect Association LS after all I/O's
complete (which is after ABTS'd certainly). Utilizes the new LLDD
api to send ls requests.
There is no need to track the Disconnect LS response or to retry
after timeout. All spec requirements will have been met by waiting
for i/o completion to initiate the transmission.
Add support for tracking the reception of Disconnect Association
and defering the response transmission until after the Disconnect
Association LS has been transmit.
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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In preparation to add ls request support, rename the current ls_list,
which is RCV LS request only, to ls_rcv_list.
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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In preparation for sending LS requests for an association that
terminates, save and track the hosthandle that is part of the
LS's that are received to create associations.
Support consists of:
- Create a hostport structure that will be 1:1 mapped to a
host port handle. The hostport structure is specific to
a targetport.
- Whenever an association is created, create a host port for
the hosthandle the Create Association LS was received from.
There will be only 1 hostport structure created, with all
associations that have the same hosthandle sharing the
hostport structure.
- When the association is terminated, the hostport reference
will be removed. After the last association for the host
port is removed, the hostport will be deleted.
- Add support for the new nvmet_fc_invalidate_host() interface.
In the past, the LLDD didn't notify loss of connectivity to
host ports - the LLD would simply reject new requests and wait
for the kato timeout to kill the association. Now, when host
port connectivity is lost, the LLDD can notify the transport.
The transport will initiate the termination of all associations
for that host port. When the last association has been terminated
and the hosthandle will no longer be referenced, the new
host_release callback will be made to the lldd.
- For compatibility with prior behavior which didn't report the
hosthandle: the LLDD must set hosthandle to NULL. In these
cases, not LS request will be made, and no host_release callbacks
will be made either.
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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While code reviewing saw a couple of items that can be cleaned up:
- In nvmet_fc_delete_target_queue(), the routine unlocks, then checks
and relocks. Reorganize to avoid the unlock/relock.
- In nvmet_fc_delete_target_queue(), there's a check on the disconnect
state that is unnecessary as the routine validates the state before
starting any action.
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Add LS reception failure messages
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Given that both host and target now generate and receive LS's create
a single table definition for LS names. Each tranport half will have
a local version of the table.
Convert the target side transport to use the new common Create
Association LS validation routine.
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Ensure that when allocations are done, and the lldd options indicate
no private data is needed, that private pointers will be set to NULL
(catches driver error that forgot to set private data size).
Slightly reorg the allocations so that private data follows allocations
for LS request/response buffers. Ensures better alignments for the buffers
as well as the private pointer.
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Current code uses NVME_FC_MAX_LS_BUFFER_SIZE (2KB) when allocating
buffers for LS requests and responses. This is considerable overkill
for what is actually defined.
Rework code to have unions for all possible requests and responses
and size based on the unions. Remove NVME_FC_MAX_LS_BUFFER_SIZE.
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Routines in the target will want to be used in the host as well.
Error definitions should now shared as both sides will process
requests and responses to requests.
Moved common declarations to new fc.h header kept in the host
subdirectory.
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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The current LLDD api has:
nvme-fc: contains api for transport to do LS requests (and aborts of
them). However, there is no interface for reception of LS's and sending
responses for them.
nvmet-fc: contains api for transport to do reception of LS's and sending
of responses for them. However, there is no interface for doing LS
requests.
Revise the api's so that both nvme-fc and nvmet-fc can send LS's, as well
as receiving LS's and sending their responses.
Change name of the rcv_ls_req struct to better reflect generic use as
a context to used to send an ls rsp. Specifically:
nvmefc_tgt_ls_req -> nvmefc_ls_rsp
nvmefc_tgt_ls_req.nvmet_fc_private -> nvmefc_ls_rsp.nvme_fc_private
Change nvmet_fc_rcv_ls_req() calling sequence to provide handle that
can be used by transport in later LS request sequences for an association.
nvme-fc nvmet_fc nvme_fcloop:
Revise to adapt to changed names in api header.
Change calling sequence to nvmet_fc_rcv_ls_req() for hosthandle.
Add stubs for new interfaces:
host/fc.c: nvme_fc_rcv_ls_req()
target/fc.c: nvmet_fc_invalidate_host()
lpfc:
Revise to adapt code to changed names in api header.
Change calling sequence to nvmet_fc_rcv_ls_req() for hosthandle.
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Pull block fixes from Jens Axboe:
"Here's a set of fixes that should go into this merge window. This
contains:
- NVMe pull request from Christoph with various fixes
- Better discard support for loop (Evan)
- Only call ->commit_rqs() if we have queued IO (Keith)
- blkcg offlining fixes (Tejun)
- fix (and fix the fix) for busy partitions"
* tag 'block-5.7-2020-04-10' of git://git.kernel.dk/linux-block:
block: fix busy device checking in blk_drop_partitions again
block: fix busy device checking in blk_drop_partitions
nvmet-rdma: fix double free of rdma queue
blk-mq: don't commit_rqs() if none were queued
nvme-fc: Revert "add module to ops template to allow module references"
nvme: fix deadlock caused by ANA update wrong locking
nvmet-rdma: fix bonding failover possible NULL deref
loop: Better discard support for block devices
loop: Report EOPNOTSUPP properly
nvmet: fix NULL dereference when removing a referral
nvme: inherit stable pages constraint in the mpath stack device
blkcg: don't offline parent blkcg first
blkcg: rename blkcg->cgwb_refcnt to ->online_pin and always use it
nvme-tcp: fix possible crash in recv error flow
nvme-tcp: don't poll a non-live queue
nvme-tcp: fix possible crash in write_zeroes processing
nvmet-fc: fix typo in comment
nvme-rdma: Replace comma with a semicolon
nvme-fcloop: fix deallocation of working context
nvme: fix compat address handling in several ioctls
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In case rdma accept fails at nvmet_rdma_queue_connect(), release work is
scheduled. Later on, a new RDMA CM event may arrive since we didn't
destroy the cm-id and call nvmet_rdma_queue_connect_fail(), which
schedule another release work. This will cause calling
nvmet_rdma_free_queue twice. To fix this we implicitly destroy the cm_id
with non-zero ret code, which guarantees that new rdma_cm events will
not arrive afterwards. Also add a qp pointer to nvmet_rdma_queue
structure, so we can use it when the cm_id pointer is NULL or was
destroyed.
Signed-off-by: Israel Rukshin <israelr@mellanox.com>
Suggested-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
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The original patch was to resolve the lldd being able to be unloaded
while being used to talk to the boot device of the system. However, the
end result of the original patch is that any driver unload while a nvme
controller is live via the lldd is now being prohibited. Given the module
reference, the module teardown routine can't be called, thus there's no
way, other than manual actions to terminate the controllers.
Fixes: 863fbae929c7 ("nvme_fc: add module to ops template to allow module references")
Cc: <stable@vger.kernel.org> # v5.4+
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
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RDMA_CM_EVENT_ADDR_CHANGE event occur in the case of bonding failover
on normal as well as on listening cm_ids. Hence this event will
immediately trigger a NULL dereference trying to disconnect a queue
for a cm_id that actually belongs to the port.
To fix this we provide a different handler for the listener cm_ids
that will defer a work to disable+(re)enable the port which essentially
destroys and setups another listener cm_id
Reported-by: Alex Lyakas <alex@zadara.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Tested-by: Alex Lyakas <alex@zadara.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
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Pull SCSI updates from James Bottomley:
"This series has a huge amount of churn because it pulls in Mauro's doc
update changing all our txt files to rst ones.
Excluding that, we have the usual driver updates (qla2xxx, ufs, lpfc,
zfcp, ibmvfc, pm80xx, aacraid), a treewide update for scnprintf and
some other minor updates.
The major core change is Hannes moving functions out of the aacraid
driver and into the core"
* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (223 commits)
scsi: aic7xxx: aic97xx: Remove FreeBSD-specific code
scsi: ufs: Do not rely on prefetched data
scsi: dc395x: remove dc395x_bios_param
scsi: libiscsi: Fix error count for active session
scsi: hpsa: correct race condition in offload enabled
scsi: message: fusion: Replace zero-length array with flexible-array member
scsi: qedi: Add PCI shutdown handler support
scsi: qedi: Add MFW error recovery process
scsi: ufs: Enable block layer runtime PM for well-known logical units
scsi: ufs-qcom: Override devfreq parameters
scsi: ufshcd: Let vendor override devfreq parameters
scsi: ufshcd: Update the set frequency to devfreq
scsi: ufs: Resume ufs host before accessing ufs device
scsi: ufs-mediatek: customize the delay for enabling host
scsi: ufs: make HCE polling more compact to improve initialization latency
scsi: ufs: allow custom delay prior to host enabling
scsi: ufs-mediatek: use common delay function
scsi: ufs: introduce common and flexible delay function
scsi: ufs: use an enum for host capabilities
scsi: ufs: fix uninitialized tx_lanes in ufshcd_disable_tx_lcc()
...
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When item release is called, the parent is already null. We need the
parent to pass to nvmet_referral_disable so hook it up to
->disconnect_notify.
Reported-by: Tony Asleson <tasleson@redhat.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>
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Fix typo in comment: about should be abort
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chiatanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Himanshu Madhani <hmadhani@marvell.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
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There's been a longstanding bug of LS completions which freed ls ops,
particularly the disconnect LS, while executing on a work context that
is in the memory being free. Not a good thing to do.
Rework LS handling to make callbacks in the rport context rather than
the ls_request context.
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
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Pull block driver updates from Jens Axboe:
- floppy driver cleanup series from Willy
- NVMe updates and fixes (Various)
- null_blk trace improvements (Chaitanya)
- bcache fixes (Coly)
- md fixes (via Song)
- loop block size change optimizations (Martijn)
- scnprintf() use (Takashi)
* tag 'for-5.7/drivers-2020-03-29' of git://git.kernel.dk/linux-block: (81 commits)
null_blk: add trace in null_blk_zoned.c
null_blk: add tracepoint helpers for zoned mode
block: add a zone condition debug helper
nvme: cleanup namespace identifier reporting in nvme_init_ns_head
nvme: rename __nvme_find_ns_head to nvme_find_ns_head
nvme: refactor nvme_identify_ns_descs error handling
nvme-tcp: Add warning on state change failure at nvme_tcp_setup_ctrl
nvme-rdma: Add warning on state change failure at nvme_rdma_setup_ctrl
nvme: Fix controller creation races with teardown flow
nvme: Make nvme_uninit_ctrl symmetric to nvme_init_ctrl
nvme: Fix ctrl use-after-free during sysfs deletion
nvme-pci: Re-order nvme_pci_free_ctrl
nvme: Remove unused return code from nvme_delete_ctrl_sync
nvme: Use nvme_state_terminal helper
nvme: release ida resources
nvme: Add compat_ioctl handler for NVME_IOCTL_SUBMIT_IO
nvmet-tcp: optimize tcp stack TX when data digest is used
nvme-fabrics: Use scnprintf() for avoiding potential buffer overflow
nvme-multipath: do not reset on unknown status
nvmet-rdma: allocate RW ctxs according to mdts
...
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Pull block updates from Jens Axboe:
- Online capacity resizing (Balbir)
- Number of hardware queue change fixes (Bart)
- null_blk fault injection addition (Bart)
- Cleanup of queue allocation, unifying the node/no-node API
(Christoph)
- Cleanup of genhd, moving code to where it makes sense (Christoph)
- Cleanup of the partition handling code (Christoph)
- disk stat fixes/improvements (Konstantin)
- BFQ improvements (Paolo)
- Various fixes and improvements
* tag 'for-5.7/block-2020-03-29' of git://git.kernel.dk/linux-block: (72 commits)
block: return NULL in blk_alloc_queue() on error
block: move bio_map_* to blk-map.c
Revert "blkdev: check for valid request queue before issuing flush"
block: simplify queue allocation
bcache: pass the make_request methods to blk_queue_make_request
null_blk: use blk_mq_init_queue_data
block: add a blk_mq_init_queue_data helper
block: move the ->devnode callback to struct block_device_operations
block: move the part_stat* helpers from genhd.h to a new header
block: move block layer internals out of include/linux/genhd.h
block: move guard_bio_eod to bio.c
block: unexport get_gendisk
block: unexport disk_map_sector_rcu
block: unexport disk_get_part
block: mark part_in_flight and part_in_flight_rw static
block: mark block_depr static
block: factor out requeue handling from dispatch code
block/diskstats: replace time_in_queue with sum of request times
block/diskstats: accumulate all per-cpu counters in one pass
block/diskstats: more accurate approximation of io_ticks for slow disks
...
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Put the ctrl reference count at nvme_uninit_ctrl as opposed to
nvme_init_ctrl which takes it. This decrease the reference count at the
core layer instead of decreasing it on each transport separately.
Also move the call of nvme_uninit_ctrl at PCI driver after calling to
nvme_release_prp_pools and nvme_dev_unmap, in order to put the reference
count after using the dev. This is safe because those functions use
nvme_dev which is freed only later at nvme_pci_free_ctrl.
Signed-off-by: Israel Rukshin <israelr@mellanox.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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In case nvme_sysfs_delete() is called by the user before taking the ctrl
reference count, the ctrl may be freed during the creation and cause the
bug. Take the reference as soon as the controller is externally visible,
which is done by cdev_device_add() in nvme_init_ctrl(). Also take the
reference count at the core layer instead of taking it on each transport
separately.
Signed-off-by: Israel Rukshin <israelr@mellanox.com>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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If we have a 4-byte data digest to send to the wire, but we
have more data to send, set MSG_MORE to tell the stack
that more is coming.
Reviewed-by: Mark Wunderlich <mark.wunderlich@intel.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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Current nvmet-rdma code allocates MR pool budget based on queue size,
assuming both host and target use the same "max_pages_per_mr" count.
After limiting the mdts value for RDMA controllers, we know the factor
of maximum MR's per IO operation. Thus, make sure MR pool will be
sufficient for the required IO depth and IO size.
That is, say host's SQ size is 100, then the MR pool budget allocated
currently at target will also be 100 MRs. But 100 IO WRITE Requests
with 256 sg_count(IO size above 1MB) require 200 MRs when target's
"max_pages_per_mr" is 128.
Reported-by: Krishnamraju Eraparaju <krishna2@chelsio.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Max Gurtovoy <maxg@mellanox.com>
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Set the maximal data transfer size to be 1MB (currently mdts is
unlimited). This will allow calculating the amount of MR's that
one ctrl should allocate to fulfill it's capabilities.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Max Gurtovoy <maxg@mellanox.com>
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Some transports, such as RDMA, would like to set the Maximum Data
Transfer Size (MDTS) according to device/port/ctrl characteristics.
This will enable the transport to set the optimal MDTS according to
controller needs and device capabilities. Add a new nvmet transport
op that is called during ctrl identification. This will not effect
transports that don't implement this option. The return value of the new
op is according to the NVMe spec definition for MDTS.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Max Gurtovoy <maxg@mellanox.com>
Signed-off-by: Israel Rukshin <israelr@mellanox.com>
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MAXH2CDATA is not zero based. Also no reason to limit ourselves to
1M transfers as we can do more easily. Make this an arbitrary limit
of 16M.
Reported-by: Wenhua Liu <liuw@vmware.com>
Cc: stable@vger.kernel.org # v5.0+
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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For set feature command when setting up NVME_FEAT_NUM_QUEUES, check
Number of I/O Completion Queues Requested (NCQR) and Number of I/O
Submission Queues Requested (NSQR) before we proceed, for invalid values
(i.e. 65535) return an appropriate NVMe invalid field status.
Signed-off-by: Amit Engel <Amit.Engel@dell.com>
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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These macros are just used by a few files. Move them out of genhd.h,
which is included everywhere into a new standalone header.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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When we send PDU data, we want to optimize the tcp stack
operation if we have more data to send. So when we set MSG_MORE
when:
- We have more fragments coming in the batch, or
- We have a more data to send in this PDU
- We don't have a data digest trailer
- We optimize with the SUCCESS flag and omit the NVMe completion
(used if sq_head pointer update is disabled)
This addresses a regression in QD=1 with SUCCESS flag optimization
as we unconditionally set MSG_MORE when we didn't actually have
more data to send.
Fixes: 70583295388a ("nvmet-tcp: implement C2HData SUCCESS optimization")
Reported-by: Mark Wunderlich <mark.wunderlich@intel.com>
Tested-by: Mark Wunderlich <mark.wunderlich@intel.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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Move the get_unaligned_be24(), get_unaligned_le24() and
put_unaligned_le24() definitions from various drivers into
include/linux/unaligned/generic.h. Add a put_unaligned_be24()
implementation.
Link: https://lore.kernel.org/r/20200313203102.16613-4-bvanassche@acm.org
Cc: Keith Busch <kbusch@kernel.org>
Cc: Sagi Grimberg <sagi@grimberg.me>
Cc: Jens Axboe <axboe@fb.com>
Cc: Harvey Harrison <harvey.harrison@gmail.com>
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> # For drivers/usb
Reviewed-by: Felipe Balbi <balbi@kernel.org> # For drivers/usb/gadget
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Enable ability to associate all sockets related to NVMf TCP traffic
to a priority group that will perform optimized network processing for
this traffic class. Maintain initial default behavior of using priority
of zero.
Signed-off-by: Kiran Patil <kiran.patil@intel.com>
Signed-off-by: Mark Wunderlich <mark.wunderlich@intel.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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For nvmet in configfs.c we check return values for all the sscanf()
calls. Add similar check into the nvmet_subsys_attr_serial_store().
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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This patch adds a new target subsys attribute which allows user to
optionally specify model name which then used in the
nvmet_execute_identify_ctrl() to fill up the nvme_id_ctrl structure.
The default value for the model is set to "Linux" for backward
compatibility.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Mark Ruijter <MRuijter@onestopsystems.com>
[chaitanya.kulkarni@wdc.com
*Use macro for default model, coding style fixes.
*Use RCU for accessing model in for configfs and in
nvmet_execute_identify_ctrl().
]
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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This patch adds a new target subsys attribute which allows user to
optionally specify target controller IDs which then used in the
nvmet_execute_identify_ctrl() to fill up the nvme_id_ctrl structure.
For example, when using a cluster setup with two nodes, with a dual
ported NVMe drive and exporting the drive from both the nodes,
The connection to the host fails due to the same controller ID and
results in the following error message:-
"nvme nvmeX: Duplicate cntlid XXX with nvmeX, rejecting"
With this patch now user can partition the controller IDs for each
subsystem by setting up the cntlid_min and cntlid_max. These values
will be used at the time of the controller ID creation. By partitioning
the ctrl-ids for each subsystem results in the unique ctrl-id space
which avoids the collision.
When new attribute is not specified target will fall back to original
cntlid calculation method.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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This is a pure code cleanup patch which does not change any
functionality. This patch removes the extra lines, get rid of
else which is duplicate for return.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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All async events are enqueued via nvmet_add_async_event() which
updates the ctrl->async_event_cmds[] array and additionally an struct
nvmet_async_event is added to the ctrl->async_events list.
Under normal operations the nvmet_async_event_work() updates again
the ctrl->async_event_cmds and removes the corresponding struct
nvmet_async_event from the list again. Though nvmet_sq_destroy() could
be called which calls nvmet_async_events_free() which only updates the
ctrl->async_event_cmds[] array.
Add new functions nvmet_async_events_process() and
nvmet_async_events_free() to process async events, update an array and
the list.
When we destroy submission queue after clearing the aen present on
the ctrl->async list we also loop over ctrl->async_event_cmds[] for
any requests posted by the host for which we don't have the AEN in
the ctrl->async_events list by calling nvmet_async_event_process()
and nvmet_async_events_free().
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Daniel Wagner <dwagner@suse.de>
[chaitanya.kulkarni@wdc.com
* Loop over and clear out outstanding requests
* Update changelog
]
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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After nvmet_install_queue() sets sq->ctrl calling to nvmet_sq_destroy()
reduces the controller refcount. In case nvmet_install_queue() fails,
calling to nvmet_ctrl_put() is done twice (at nvmet_sq_destroy and
nvmet_execute_io_connect/nvmet_execute_admin_connect) instead of once for
the queue which leads to use after free of the controller. Fix this by set
NULL at sq->ctrl in case of a failure at nvmet_install_queue().
The bug leads to the following Call Trace:
[65857.994862] refcount_t: underflow; use-after-free.
[65858.108304] Workqueue: events nvmet_rdma_release_queue_work [nvmet_rdma]
[65858.115557] RIP: 0010:refcount_warn_saturate+0xe5/0xf0
[65858.208141] Call Trace:
[65858.211203] nvmet_sq_destroy+0xe1/0xf0 [nvmet]
[65858.216383] nvmet_rdma_release_queue_work+0x37/0xf0 [nvmet_rdma]
[65858.223117] process_one_work+0x167/0x370
[65858.227776] worker_thread+0x49/0x3e0
[65858.232089] kthread+0xf5/0x130
[65858.235895] ? max_active_store+0x80/0x80
[65858.240504] ? kthread_bind+0x10/0x10
[65858.244832] ret_from_fork+0x1f/0x30
[65858.249074] ---[ end trace f82d59250b54beb7 ]---
Fixes: bb1cc74790eb ("nvmet: implement valid sqhd values in completions")
Fixes: 1672ddb8d691 ("nvmet: Add install_queue callout")
Signed-off-by: Israel Rukshin <israelr@mellanox.com>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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Place the arguments in the correct order.
Fixes: 1672ddb8d691 ("nvmet: Add install_queue callout")
Signed-off-by: Israel Rukshin <israelr@mellanox.com>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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The host is allowed to pass the controller an sgl describing a buffer
that is larger than the dsm payload itself, allow it when executing
dsm.
Reported-by: Dakshaja Uppalapati <dakshaja@chelsio.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>,
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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ctrl->subsys->namespaces and subsys->namespaces are traversed with
list_for_each_entry_rcu outside an RCU read-side critical section but
under the protection of ctrl->subsys->lock and subsys->lock respectively.
Hence, add the corresponding lockdep expression to the list traversal
primitive to silence false-positive lockdep warnings, and harden RCU
lists.
Reported-by: kbuild test robot <lkp@intel.com>
Reviewed-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Signed-off-by: Amol Grover <frextrite@gmail.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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The existing implementation for the get_feature admin-cmd does not
use per-feature data len. This patch introduces a new helper function
nvmet_feat_data_len(), which is used to calculate per feature data len.
Right now we only set data len for fid 0x81 (NVME_FEAT_HOST_ID).
Fixes: commit e9061c397839 ("nvmet: Remove the data_len field from the nvmet_req struct")
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Amit Engel <amit.engel@dell.com>
[endiness, naming, and kernel style fixes]
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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In nvme-fc: it's possible to have connected active controllers
and as no references are taken on the LLDD, the LLDD can be
unloaded. The controller would enter a reconnect state and as
long as the LLDD resumed within the reconnect timeout, the
controller would resume. But if a namespace on the controller
is the root device, allowing the driver to unload can be problematic.
To reload the driver, it may require new io to the boot device,
and as it's no longer connected we get into a catch-22 that
eventually fails, and the system locks up.
Fix this issue by taking a module reference for every connected
controller (which is what the core layer did to the transport
module). Reference is cleared when the controller is removed.
Acked-by: Himanshu Madhani <hmadhani@marvell.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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nvme_loop_create_io_queues() preallocates a big buffer for the IO SGL based
on SG_CHUNK_SIZE.
Modern DMA engines are often capable of dealing with very big segments so
the SG_CHUNK_SIZE is often too big. SG_CHUNK_SIZE results in a static 4KB
SGL allocation per command.
If a controller has lots of deep queues, preallocation for the sg list can
consume substantial amounts of memory. For nvmet-loop, nr_hw_queues can be
128 and each queue's depth 128. This means the resulting preallocation
for the data SGL is 128*128*4K = 64MB per controller.
Switch to runtime allocation for SGL for lists longer than 2 entries. This
is the approach used by NVMe PCI so it should be reasonable for NVMeOF as
well. Runtime SGL allocation has always been the case for the legacy I/O
path so this is nothing new.
Tested-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Signed-off-by: Israel Rukshin <israelr@mellanox.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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Pull block driver updates from Jens Axboe:
"Here are the main block driver updates for 5.5. Nothing major in here,
mostly just fixes. This contains:
- a set of bcache changes via Coly
- MD changes from Song
- loop unmap write-zeroes fix (Darrick)
- spelling fixes (Geert)
- zoned additions cleanups to null_blk/dm (Ajay)
- allow null_blk online submit queue changes (Bart)
- NVMe changes via Keith, nothing major here either"
* tag 'for-5.5/drivers-20191121' of git://git.kernel.dk/linux-block: (56 commits)
Revert "bcache: fix fifo index swapping condition in journal_pin_cmp()"
drivers/md/raid5-ppl.c: use the new spelling of RWH_WRITE_LIFE_NOT_SET
drivers/md/raid5.c: use the new spelling of RWH_WRITE_LIFE_NOT_SET
bcache: don't export symbols
bcache: remove the extra cflags for request.o
bcache: at least try to shrink 1 node in bch_mca_scan()
bcache: add idle_max_writeback_rate sysfs interface
bcache: add code comments in bch_btree_leaf_dirty()
bcache: fix deadlock in bcache_allocator
bcache: add code comment bch_keylist_pop() and bch_keylist_pop_front()
bcache: deleted code comments for dead code in bch_data_insert_keys()
bcache: add more accurate error messages in read_super()
bcache: fix static checker warning in bcache_device_free()
bcache: fix a lost wake-up problem caused by mca_cannibalize_lock
bcache: fix fifo index swapping condition in journal_pin_cmp()
md/raid10: prevent access of uninitialized resync_pages offset
md: avoid invalid memory access for array sb->dev_roles
md/raid1: avoid soft lockup under high load
null_blk: add zone open, close, and finish support
dm: add zone open, close and finish support
...
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