TCP transport relies on the routing table to determine which source
address and interface to use when making a connection. Currently, there
is no way to tell from userspace where a connection was made. This
patch exposes the actual source address using a new field named
"src_addr=" in the "address" attribute.
This is needed to diagnose and identify connectivity issues. With the
source address we can infer the interface associated with each
connection.
This was tested with nvme-cli 2.0 to verify it does not have any
adverse effect. The new "src_addr=" field will simply be displayed in
the output of the "list-subsys" or "list -v" commands as shown here.
$ nvme list-subsys
nvme-subsys0 - NQN=nqn.2014-08.org.nvmexpress.discovery
\
+- nvme0 tcp traddr=192.168.56.1,trsvcid=8009,src_addr=192.168.56.101 live
Signed-off-by: Martin Belanger <martin.belanger@dell.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
kmap() is being deprecated in favor of kmap_local_page().[1]
There are two main problems with kmap(): (1) It comes with an overhead as
mapping space is restricted and protected by a global lock for
synchronization and (2) it also requires global TLB invalidation when the
kmap’s pool wraps and it might block when the mapping space is fully
utilized until a slot becomes available.
The pages which will be mapped are allocated in nvmet_tcp_map_data(),
using the GFP_KERNEL flag. This assures that they cannot come from
HIGHMEM. This imply that a straight page_address() can replace the kmap()
of sg_page(sg) in nvmet_tcp_map_pdu_iovec(). As a side effect, we might
also delete the field "nr_mapped" from struct "nvmet_tcp_cmd" because,
after removing the kmap() calls, there would be no longer any need of it.
In addition, there is no reason to use a kvec for the command receive
data buffers iovec, use a bio_vec instead and let iov_iter handle the
buffer mapping and data copy.
Test with blktests on a QEMU/KVM x86_32 VM, 6GB RAM, booting a kernel with
HIGHMEM64GB enabled.
[1] "[PATCH] checkpatch: Add kmap and kmap_atomic to the deprecated
list" https://lore.kernel.org/all/20220813220034.806698-1-ira.weiny@intel.com/
Cc: Chaitanya Kulkarni <chaitanyak@nvidia.com>
Cc: Keith Busch <kbusch@kernel.org>
Suggested-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Fabio M. De Francesco <fmdefrancesco@gmail.com>
Suggested-by: Christoph Hellwig <hch@lst.de>
Suggested-by: Al Viro <viro@zeniv.linux.org.uk>
[sagi: added bio_vec plus minor naming changes]
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
The 32-bit field, dma_len, packs better in the iod struct above the
dma_addr_t on 64-bit systems.
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
The largest allowed transfer is 4MB, which can use at most 1025 PRPs.
Each PRP is 8 bytes, so the maximum number of 4k nvme pages needed for
the iod_list is 3, which fits in an 's8' type.
While modifying this field, change the name to "nr_allocations" to
better represent that this is referring to the number of units allocated
from a dma_pool.
Also introduce a BUILD_BUG_ON to ensure we never accidently increase the
largest transfer limit beyond 127 chained prp lists.
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
It's only true or false, so make this a bool to reflect that and save
some space in nvme_iod.
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
We can get the nvme_queue from the req just as easily, so remove the
duplicate path to the same structure to save some space.
Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
It's perfectly fine to use the same traddr and trsvcid more than once
as long we use different host interface. This is used in setups where
the host has more than one interface but the target exposes only one
traddr/trsvcid combination.
Use the same acceptance rules for host_iface as we have for
host_traddr.
Signed-off-by: Daniel Wagner <dwagner@suse.de>
Reviewed-by: Chao Leng <lengchao@huawei.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
On reconnect, the number of queues might have changed.
In the case where we have more queues available than previously we try
to access queues which are not initialized yet.
The other case where we have less queues than previously, the
connection attempt will fail because the target doesn't support the
old number of queues and we end up in a reconnect loop.
Thus, only start queues which are currently present in the tagset
limited by the number of available queues. Then we update the tagset
and we can start any new queue.
Signed-off-by: Daniel Wagner <dwagner@suse.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
On reconnect, the number of queues might have changed.
In the case where we have more queues available than previously we try
to access queues which are not initialized yet.
The other case where we have less queues than previously, the
connection attempt will fail because the target doesn't support the
old number of queues and we end up in a reconnect loop.
Thus, only start queues which are currently present in the tagset
limited by the number of available queues. Then we update the tagset
and we can start any new queue.
Signed-off-by: Daniel Wagner <dwagner@suse.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Allow to set the max queues the target supports. This is useful for
testing the reconnect attempt of the host with changing numbers of
supported queues.
Signed-off-by: Daniel Wagner <dwagner@suse.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
For no volatile write cache block device backend, sending flush bio is
unnecessary, avoid to do that.
Signed-off-by: Guixin Liu <kanie@linux.alibaba.com>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
The parameter is not used in this function, so remove it.
Signed-off-by: Genjian Zhang <zhanggenjian@kylinos.cn>
Signed-off-by: Christoph Hellwig <hch@lst.de>
req->cqe->result.u16 has already been assigned in the previous line, no
need to do it again.
Signed-off-by: Jackie Liu <liuyun01@kylinos.cn>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Current "fake" nqn field is "nqn.2014.08.org.nvmexpress:", it is
not aligned with the canonical version for history reasons.
Signed-off-by: Linjun Bao <meljbao@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Pull block fixes from Jens Axboe:
- NVMe pull via Christoph:
- fix a use after free in nvmet (Bart Van Assche)
- fix a use after free when detecting digest errors
(Sagi Grimberg)
- fix regression that causes sporadic TCP requests to time out
(Sagi Grimberg)
- fix two off by ones errors in the nvmet ZNS support
(Dennis Maisenbacher)
- requeue aen after firmware activation (Keith Busch)
- Fix missing request flags in debugfs code (me)
- Partition scan fix (Ming)
* tag 'block-6.0-2022-09-09' of git://git.kernel.dk/linux-block:
block: add missing request flags to debugfs code
nvme: requeue aen after firmware activation
nvmet: fix mar and mor off-by-one errors
nvme-tcp: fix regression that causes sporadic requests to time out
nvme-tcp: fix UAF when detecting digest errors
nvmet: fix a use-after-free
block: don't add partitions if GD_SUPPRESS_PART_SCAN is set
Maximum Active Resources (MAR) and Maximum Open Resources (MOR) are 0's
based vales where a value of 0xffffffff indicates that there is no limit.
Decrement the values that are returned by bdev_max_open_zones and
bdev_max_active_zones as the block layer helpers are not 0's based.
A 0 returned by the block layer helpers indicates no limit, thus convert
it to 0xffffffff (U32_MAX).
Fixes: aaf2e048af ("nvmet: add ZBD over ZNS backend support")
Suggested-by: Niklas Cassel <niklas.cassel@wdc.com>
Signed-off-by: Dennis Maisenbacher <dennis.maisenbacher@wdc.com>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
When we queue requests, we strive to batch as much as possible and also
signal the network stack that more data is about to be sent over a socket
with MSG_SENDPAGE_NOTLAST. This flag looks at the pending requests queued
as well as queue->more_requests that is derived from the block layer
last-in-batch indication.
We set more_request=true when we flush the request directly from
.queue_rq submission context (in nvme_tcp_send_all), however this is
wrongly assuming that no other requests may be queued during the
execution of nvme_tcp_send_all.
Due to this, a race condition may happen where:
1. request X is queued as !last-in-batch
2. request X submission context calls nvme_tcp_send_all directly
3. nvme_tcp_send_all is preempted and schedules to a different cpu
4. request Y is queued as last-in-batch
5. nvme_tcp_send_all context sends request X+Y, however signals for
both MSG_SENDPAGE_NOTLAST because queue->more_requests=true.
==> none of the requests is pushed down to the wire as the network
stack is waiting for more data, both requests timeout.
To fix this, we eliminate queue->more_requests and only rely on
the queue req_list and send_list to be not-empty.
Fixes: 122e5b9f3d ("nvme-tcp: optimize network stack with setting msg flags according to batch size")
Reported-by: Jonathan Nicklin <jnicklin@blockbridge.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Tested-by: Jonathan Nicklin <jnicklin@blockbridge.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
We should also bail from the io_work loop when we set rd_enabled to true,
so we don't attempt to read data from the socket when the TCP stream is
already out-of-sync or corrupted.
Fixes: 3f2304f8c6 ("nvme-tcp: add NVMe over TCP host driver")
Reported-by: Daniel Wagner <dwagner@suse.de>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Daniel Wagner <dwagner@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Pull block fixes from Jens Axboe:
- NVMe pull request via Christoph:
- error handling fix for the new auth code (Hannes Reinecke)
- fix unhandled tcp states in nvmet_tcp_state_change (Maurizio
Lombardi)
- add NVME_QUIRK_BOGUS_NID for Lexar NM610 (Shyamin Ayesh)
- Add documentation for the ublk driver merged in this merge window
(Ming)
* tag 'block-6.0-2022-09-02' of git://git.kernel.dk/linux-block:
Documentation: document ublk
nvmet-tcp: fix unhandled tcp states in nvmet_tcp_state_change()
nvmet-auth: add missing goto in nvmet_setup_auth()
nvme-pci: add NVME_QUIRK_BOGUS_NID for Lexar NM610
TCP_FIN_WAIT2 and TCP_LAST_ACK were not handled, the connection is closing
so we can ignore them and avoid printing the "unhandled state"
warning message.
[ 1298.852386] nvmet_tcp: queue 2 unhandled state 5
[ 1298.879112] nvmet_tcp: queue 7 unhandled state 5
[ 1298.884253] nvmet_tcp: queue 8 unhandled state 5
[ 1298.889475] nvmet_tcp: queue 9 unhandled state 5
v2: Do not call nvmet_tcp_schedule_release_queue(), just ignore
the fin_wait2 and last_ack states.
Signed-off-by: Maurizio Lombardi <mlombard@redhat.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
There's a goto missing in nvmet_setup_auth(), causing a kernel oops
when nvme_auth_extract_key() fails.
Reported-by: Tal Lossos <tallossos@gmail.com>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Lexar NM610 reports bogus eui64 values that appear to be the same across
all drives. Quirk them out so they are not marked as "non globally unique"
duplicates.
Signed-off-by: Shyamin Ayesh <me@shyamin.com>
[patch formatting]
Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Pull block fixes from Jens Axboe:
- NVMe pull request
- print nvme connect Linux error codes properly (Amit Engel)
- fix the fc_appid_store return value (Christoph Hellwig)
- fix a typo in an error message (Christophe JAILLET)
- add another non-unique identifier quirk (Dennis P. Kliem)
- check if the queue is allocated before stopping it in nvme-tcp
(Maurizio Lombardi)
- restart admin queue if the caller needs to restart queue in
nvme-fc (Ming Lei)
- use kmemdup instead of kmalloc + memcpy in nvme-auth (Zhang
Xiaoxu)
- __alloc_disk_node() error handling fix (Rafael)
* tag 'block-6.0-2022-08-12' of git://git.kernel.dk/linux-block:
block: Do not call blk_put_queue() if gendisk allocation fails
nvme-pci: add NVME_QUIRK_BOGUS_NID for ADATA XPG GAMMIX S70
nvme-tcp: check if the queue is allocated before stopping it
nvme-fabrics: Fix a typo in an error message
nvme-fabrics: parse nvme connect Linux error codes
nvmet-auth: use kmemdup instead of kmalloc + memcpy
nvme-fc: fix the fc_appid_store return value
nvme-fc: restart admin queue if the caller needs to restart queue
ADATA XPG GAMMIX S70 reports bogus eui64 values that appear to be the same
across all drives. Quirk them out so they are not marked as "non globally
unique" duplicates.
Signed-off-by: Dennis P. Kliem <dpkliem@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
When an error is detected and the host reconnects, the
nvme_tcp_error_recovery_work() function is called and starts
tearing down the io queues and de-allocating them;
If at the same time the "nvme" process deletes the controller via sysfs,
the nvme_tcp_delete_ctrl() gets called and waits until the
nvme_tcp_error_recovery_work() finishes its job; then starts
tearing down the io queues, but at this point they have already
been freed and the mutexes are destroyed.
Calling mutex_lock() against a destroyed mutex triggers a warning:
[ 1299.025575] nvme nvme1: Reconnecting in 10 seconds...
[ 1299.636449] nvme nvme1: Removing ctrl: NQN "blktests-subsystem-1"
[ 1299.645262] ------------[ cut here ]------------
[ 1299.649949] DEBUG_LOCKS_WARN_ON(lock->magic != lock)
[ 1299.649971] WARNING: CPU: 4 PID: 104150 at kernel/locking/mutex.c:579 __mutex_lock+0x2d0/0x7dc
[ 1299.717934] CPU: 4 PID: 104150 Comm: nvme
[ 1299.828075] Call trace:
[ 1299.830526] __mutex_lock+0x2d0/0x7dc
[ 1299.834203] mutex_lock_nested+0x64/0xd4
[ 1299.838139] nvme_tcp_stop_queue+0x54/0xe0 [nvme_tcp]
[ 1299.843211] nvme_tcp_teardown_io_queues.part.0+0x90/0x280 [nvme_tcp]
[ 1299.849672] nvme_tcp_delete_ctrl+0x6c/0xf0 [nvme_tcp]
[ 1299.854831] nvme_do_delete_ctrl+0x108/0x120 [nvme_core]
[ 1299.860181] nvme_sysfs_delete+0xec/0xf0 [nvme_core]
[ 1299.865179] dev_attr_store+0x40/0x70
Fix the warning by checking if the queues are allocated
in the nvme_tcp_stop_queue(). If they are not, it makes no
sense to try to stop them.
Signed-off-by: Maurizio Lombardi <mlombard@redhat.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This fixes the assumption that errval is an unsigned nvme error
Signed-off-by: Amit Engel <amit.engel@dell.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
For code neat purpose, we can use kmemdup to replace
kmalloc + memcpy.
Signed-off-by: Zhang Xiaoxu <zhangxiaoxu5@huawei.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
"nvme-fc: fold t fc_update_appid into fc_appid_store" accidentally
changed the userspace interface for the appid attribute, because the code
that decrements "count" to remove a trailing '\n' in the parsing results
in the decremented value being incorrectly be returned from the sysfs
write. Fix this by keeping an orig_count variable for the full length
of the write.
Fixes: c814153c83 ("nvme-fc: fold t fc_update_appid into fc_appid_store")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Reviewed-by: James Smart <jsmart2021@gmail.com>
Tested-by: Muneendra Kumar M <muneendra.kumar@broadcom.com>
Without restarting admin queue in __nvme_fc_abort_outstanding_ios(),
it leaves controller not capable of handling admin pt request, and
causes io hang.
Fixes it by restarting admin queue if the caller of __nvme_fc_abort_outstanding_ios
requires to restart queue.
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: James Smart <jsmart2021@gmail.com>
Tested-by: Ewan D. Milne <emilne@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Pull dma-mapping updates from Christoph Hellwig:
- convert arm32 to the common dma-direct code (Arnd Bergmann, Robin
Murphy, Christoph Hellwig)
- restructure the PCIe peer to peer mapping support (Logan Gunthorpe)
- allow the IOMMU code to communicate an optional DMA mapping length
and use that in scsi and libata (John Garry)
- split the global swiotlb lock (Tianyu Lan)
- various fixes and cleanup (Chao Gao, Dan Carpenter, Dongli Zhang,
Lukas Bulwahn, Robin Murphy)
* tag 'dma-mapping-5.20-2022-08-06' of git://git.infradead.org/users/hch/dma-mapping: (45 commits)
swiotlb: fix passing local variable to debugfs_create_ulong()
dma-mapping: reformat comment to suppress htmldoc warning
PCI/P2PDMA: Remove pci_p2pdma_[un]map_sg()
RDMA/rw: drop pci_p2pdma_[un]map_sg()
RDMA/core: introduce ib_dma_pci_p2p_dma_supported()
nvme-pci: convert to using dma_map_sgtable()
nvme-pci: check DMA ops when indicating support for PCI P2PDMA
iommu/dma: support PCI P2PDMA pages in dma-iommu map_sg
iommu: Explicitly skip bus address marked segments in __iommu_map_sg()
dma-mapping: add flags to dma_map_ops to indicate PCI P2PDMA support
dma-direct: support PCI P2PDMA pages in dma-direct map_sg
dma-mapping: allow EREMOTEIO return code for P2PDMA transfers
PCI/P2PDMA: Introduce helpers for dma_map_sg implementations
PCI/P2PDMA: Attempt to set map_type if it has not been set
lib/scatterlist: add flag for indicating P2PDMA segments in an SGL
swiotlb: clean up some coding style and minor issues
dma-mapping: update comment after dmabounce removal
scsi: sd: Add a comment about limiting max_sectors to shost optimal limit
ata: libata-scsi: cap ata_device->max_sectors according to shost->max_sectors
scsi: scsi_transport_sas: cap shost opt_sectors according to DMA optimal limit
...
Pull block driver updates from Jens Axboe:
- NVMe pull requests via Christoph:
- add support for In-Band authentication (Hannes Reinecke)
- handle the persistent internal error AER (Michael Kelley)
- use in-capsule data for TCP I/O queue connect (Caleb Sander)
- remove timeout for getting RDMA-CM established event (Israel
Rukshin)
- misc cleanups (Joel Granados, Sagi Grimberg, Chaitanya Kulkarni,
Guixin Liu, Xiang wangx)
- use command_id instead of req->tag in trace_nvme_complete_rq()
(Bean Huo)
- various fixes for the new authentication code (Lukas Bulwahn,
Dan Carpenter, Colin Ian King, Chaitanya Kulkarni, Hannes
Reinecke)
- small cleanups (Liu Song, Christoph Hellwig)
- restore compat_ioctl support (Nick Bowler)
- make a nvmet-tcp workqueue lockdep-safe (Sagi Grimberg)
- enable generic interface (/dev/ngXnY) for unknown command sets
(Joel Granados, Christoph Hellwig)
- don't always build constants.o (Christoph Hellwig)
- print the command name of aborted commands (Christoph Hellwig)
- MD pull requests via Song:
- Improve raid5 lock contention, by Logan Gunthorpe.
- Misc fixes to raid5, by Logan Gunthorpe.
- Fix race condition with md_reap_sync_thread(), by Guoqing Jiang.
- Fix potential deadlock with raid5_quiesce and
raid5_get_active_stripe, by Logan Gunthorpe.
- Refactoring md_alloc(), by Christoph"
- Fix md disk_name lifetime problems, by Christoph Hellwig
- Convert prepare_to_wait() to wait_woken() api, by Logan
Gunthorpe;
- Fix sectors_to_do bitmap issue, by Logan Gunthorpe.
- Work on unifying the null_blk module parameters and configfs API
(Vincent)
- drbd bitmap IO error fix (Lars)
- Set of rnbd fixes (Guoqing, Md Haris)
- Remove experimental marker on bcache async device registration (Coly)
- Series from cleaning up the bio splitting (Christoph)
- Removal of the sx8 block driver. This hardware never really
widespread, and it didn't receive a lot of attention after the
initial merge of it back in 2005 (Christoph)
- A few fixes for s390 dasd (Eric, Jiang)
- Followup set of fixes for ublk (Ming)
- Support for UBLK_IO_NEED_GET_DATA for ublk (ZiyangZhang)
- Fixes for the dio dma alignment (Keith)
- Misc fixes and cleanups (Ming, Yu, Dan, Christophe
* tag 'for-5.20/block-2022-08-04' of git://git.kernel.dk/linux-block: (136 commits)
s390/dasd: Establish DMA alignment
s390/dasd: drop unexpected word 'for' in comments
ublk_drv: add support for UBLK_IO_NEED_GET_DATA
ublk_cmd.h: add one new ublk command: UBLK_IO_NEED_GET_DATA
ublk_drv: cleanup ublksrv_ctrl_dev_info
ublk_drv: add SET_PARAMS/GET_PARAMS control command
ublk_drv: fix ublk device leak in case that add_disk fails
ublk_drv: cancel device even though disk isn't up
block: fix leaking page ref on truncated direct io
block: ensure bio_iov_add_page can't fail
block: ensure iov_iter advances for added pages
drivers:md:fix a potential use-after-free bug
md/raid5: Ensure batch_last is released before sleeping for quiesce
md/raid5: Move stripe_request_ctx up
md/raid5: Drop unnecessary call to r5c_check_stripe_cache_usage()
md/raid5: Make is_inactive_blocked() helper
md/raid5: Refactor raid5_get_active_stripe()
block: pass struct queue_limits to the bio splitting helpers
block: move bio_allowed_max_sectors to blk-merge.c
block: move the call to get_max_io_size out of blk_bio_segment_split
...
Pull vfs iov_iter updates from Al Viro:
"Part 1 - isolated cleanups and optimizations.
One of the goals is to reduce the overhead of using ->read_iter() and
->write_iter() instead of ->read()/->write().
new_sync_{read,write}() has a surprising amount of overhead, in
particular inside iocb_flags(). That's the explanation for the
beginning of the series is in this pile; it's not directly
iov_iter-related, but it's a part of the same work..."
* tag 'pull-work.iov_iter-base' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
first_iovec_segment(): just return address
iov_iter: massage calling conventions for first_{iovec,bvec}_segment()
iov_iter: first_{iovec,bvec}_segment() - simplify a bit
iov_iter: lift dealing with maxpages out of first_{iovec,bvec}_segment()
iov_iter_get_pages{,_alloc}(): cap the maxsize with MAX_RW_COUNT
iov_iter_bvec_advance(): don't bother with bvec_iter
copy_page_{to,from}_iter(): switch iovec variants to generic
keep iocb_flags() result cached in struct file
iocb: delay evaluation of IS_SYNC(...) until we want to check IOCB_DSYNC
struct file: use anonymous union member for rcuhead and llist
btrfs: use IOMAP_DIO_NOSYNC
teach iomap_dio_rw() to suppress dsync
No need of likely/unlikely on calls of check_copy_size()
The double indirect bio leads to somewhat suboptimal code generation.
Instead return the (original or split) bio, and make sure the
request_queue arguments to the lower level helpers is passed after the
bio to avoid constant reshuffling of the argument passing registers.
Also give it and the helpers used to implement it more descriptive names.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20220727162300.3089193-2-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
We probably need nvmet_tcp_wq to have MEM_RECLAIM as we are
sending/receiving for the socket from works on this workqueue.
Also this eliminates lockdep complaints:
--
[ 6174.010200] workqueue: WQ_MEM_RECLAIM
nvmet-wq:nvmet_tcp_release_queue_work [nvmet_tcp] is flushing
!WQ_MEM_RECLAIM nvmet_tcp_wq:nvmet_tcp_io_work [nvmet_tcp]
[ 6174.010216] WARNING: CPU: 20 PID: 14456 at kernel/workqueue.c:2628
check_flush_dependency+0x110/0x14c
Reported-by: Yi Zhang <yi.zhang@redhat.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Extend nvme_alloc_ns() and nvme_validate_ns() for unknown command-set as
well. Both are made to use a new helper (nvme_update_ns_info_cs_indep)
which is similar to nvme_update_ns_info but performs fewer operations
to get the generic interface up.
Suggested-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Joel Granados <j.granados@samsung.com>
Signed-off-by: Kanchan Joshi <joshi.k@samsung.com>
[hch: rebased on other refactoring patches]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Javier González <javier.gonz@samsung.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Change nvme_ns_scan to gather all information needed for generic
namespace setup into a nvme_ns_info structure. This structure is filled
from the Command Set Idependent Identify Namespace data structure if
it is available or else the legacy Identify namespace structure.
With that everything related to the NVM command set (and the ZNS command
set derived from it) can be encapsulated in the nvme_update_ns_info_block
function while keeping the rest of the namespace probing generic.
The downside is that we now always issue two Identify Namespace calls for
each probed namespace instead of usually just a single one previously.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Javier González <javier.gonz@samsung.com>
Reviewed-by: Joel Granados <j.granados@samsung.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Check for multiple command set support early on an error out if is
not supported when a !NVM command set namespace is found. This
prepares for adding command set independent passthrough support.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Javier González <javier.gonz@samsung.com>
Reviewed-by: Joel Granados <j.granados@samsung.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Kanchan Joshi <joshi.k@samsung.com>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
nvme_revalidate_zones can also return -ENODEV if e.g. zone sizes aren't
constant or not a power of two. In that case we should jump to marking
the gendisk hidden and only support pass through.
Fixes: 602e57c979 ("nvme: also mark passthrough-only namespaces ready in nvme_update_ns_info")
Reported-by: Joel Granados <j.granados@samsung.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Joel Granados <j.granados@samsung.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Commit 71ebe3842ebe ("nvmet-auth: Diffie-Hellman key exchange support")
intends to select 'Support for RFC 7919 FFDHE group parameters' for using
FFDHE groups for NVMe In-Band Authentication.
It however selects CRYPTO_DH_GROUPS_RFC7919, instead of the intended
CRYPTO_DH_RFC7919_GROUPS; notice the swapping of words here.
Correct the select to the intended config option.
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@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>
nvmet_auth_challenge() return type is int and currently it uses status
variable that is of type u16 in nvmet_execute_auth_receive().
Catch the return value of nvmet_auth_challenge() into int and set the
NVME_SC_INTERNAL as status variable before we jump to error.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Chaitanya Kulkarni <kch@nvidia.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>
nvmet_setup_auth() return type is int and currently it uses status
variable that is of type u16 in nvmet_execute_auth_send().
Catch the return value of nvmet_setup_auth() into int and set the
NVME_SC_INTERNAL as status variable before we jump to error.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Chaitanya Kulkarni <kch@nvidia.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>
There are a couple of spelling mistakes in pr_warn and pr_debug messages.
Fix them.
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
