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path: root/drivers/nvme/target/tcp.c
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2020-05-28net: add sock_set_reuseaddrChristoph Hellwig
Add a helper to directly set the SO_REUSEADDR sockopt from kernel space without going through a fake uaccess. For this the iscsi target now has to formally depend on inet to avoid a mostly theoretical compile failure. For actual operation it already did depend on having ipv4 or ipv6 support. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-05-27nvmet-tcp: move send/recv error handling in the send/recv methods instead of ↵Sagi Grimberg
call-sites Have routines handle errors and just bail out of the poll loop. This simplifies the code and will help as we may enhance the poll loop logic and these are somewhat in the way. Signed-off-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-05-27nvmet-tcp: set MSG_EOR if we send last payload in the batchSagi Grimberg
when trying to send the pdu data digest, we should set this flag. Reported-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-05-27nvmet-tcp: set MSG_SENDPAGE_NOTLAST with MSG_MORE when we have more to sendSagi Grimberg
We can signal the stack that this is not the last page coming and the stack can build a larger tso segment, so go ahead and use it. Signed-off-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-03-30Merge tag 'for-5.7/drivers-2020-03-29' of git://git.kernel.dk/linux-blockLinus Torvalds
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 ...
2020-03-26nvmet-tcp: optimize tcp stack TX when data digest is usedSagi Grimberg
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>
2020-03-26nvmet-tcp: fix maxh2cdata icresp parameterSagi Grimberg
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>
2020-03-21nvmet-tcp: set MSG_MORE only if we actually have more to sendSagi Grimberg
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>
2020-03-04nvmet-tcp: set SO_PRIORITY for accepted socketsWunderlich, Mark
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>
2019-11-04nvmet: Open code nvmet_req_execute()Christoph Hellwig
Now that nvmet_req_execute does nothing, open code it. Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Signed-off-by: Christoph Hellwig <hch@lst.de> [split patch, update changelog] Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Signed-off-by: Keith Busch <kbusch@kernel.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-11-04nvmet-tcp: Don't set the request's data_lenLogan Gunthorpe
It's not apprporiate for the transports to set the data_len field of the request which is only used by the core. In this case, just use a variable on the stack to store the length of the sgl for comparison. Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Signed-off-by: Keith Busch <kbusch@kernel.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-11-04nvmet-tcp: Don't check data_len in nvmet_tcp_map_data()Logan Gunthorpe
None of the other transports check data_len which is verified in core code. The function should instead check that the sgl length is non-zero. Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Signed-off-by: Keith Busch <kbusch@kernel.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-09-25nvmet-tcp: remove superflous check on request sglSagi Grimberg
Now that sgl_free is null safe, drop the superflous check. Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
2019-08-29nvmet-tcp: Add TOS for tcp transportIsrael Rukshin
Set the outgoing packets type of service (TOS) according to the receiving TOS. 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: Sagi Grimberg <sagi@grimberg.me>
2019-08-29nvmet-tcp: fix possible memory leakSagi Grimberg
when we uninit a command in error flow we also need to free an iovec if it was allocated. Reviewed-by: Max Gurtovoy <maxg@mellanox.com> Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
2019-08-29nvmet-tcp: fix possible NULL derefSagi Grimberg
We must only call sgl_free for sgl that we actually allocated. Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
2019-04-25nvmet-tcp: don't fail maxr2t greater than 1Sagi Grimberg
The host may support it, but nothing prevents us from sending a single r2t at a time like we do anyways. Signed-off-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Christoph Hellwig <hch@lst.de>
2019-04-25nvmet: rename nvme_completion instances from rsp to cqeMax Gurtovoy
Use NVMe namings for improving code readability. Signed-off-by: Max Gurtovoy <maxg@mellanox.com> Reviewed-by : Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
2019-04-05nvmet-tcp: implement C2HData SUCCESS optimizationSagi Grimberg
TP 8000 says that the use of the SUCCESS flag depends on weather the controller support disabling sq_head pointer updates. Given that we support it by default, makes sense that we go the extra mile to actually use the SUCCESS flag. When we create the C2HData PDU header, we check if sqhd_disabled is set on our queue, if so, we set the SUCCESS flag in the PDU header and skip sending a completion response capsule. Signed-off-by: Sagi Grimberg <sagi@grimberg.me> Reviewed-by: Oliver Smith-Denny <osmithde@cisco.com> Tested-by: Oliver Smith-Denny <osmithde@cisco.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
2019-01-16nvmet-tcp: fix uninitialized variable accessSagi Grimberg
If we end up in nvmet_tcp_try_recv_one with a bogus state queue receive state we will access result which is uninitialized. Initialize restult to 0 which will be considered as if no data was received by the tcp socket. Fixes: 872d26a391da ("nvmet-tcp: add NVMe over TCP target driver") Reported-by: Dan Carpenter <dan.carpenter@oracle.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>
2018-12-18nvmet-tcp: fix endianess annotationsChristoph Hellwig
Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Sagi Grimberg <sagi@grimberg.me>
2018-12-13nvmet-tcp: add NVMe over TCP target driverSagi Grimberg
This patch implements the TCP transport driver for the NVMe over Fabrics target stack. This allows exporting NVMe over Fabrics functionality over good old TCP/IP. The driver implements the TP 8000 of how nvme over fabrics capsules and data are encapsulated in nvme-tcp pdus and exchaged on top of a TCP byte stream. nvme-tcp header and data digest are supported as well. Signed-off-by: Sagi Grimberg <sagi@lightbitslabs.com> Signed-off-by: Roy Shterman <roys@lightbitslabs.com> Signed-off-by: Solganik Alexander <sashas@lightbitslabs.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
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