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* net/rds: restrict iovecs length for RDS_CMSG_RDMA_ARGSSabyrzhan Tasbolatov2021-02-021-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | syzbot found WARNING in rds_rdma_extra_size [1] when RDS_CMSG_RDMA_ARGS control message is passed with user-controlled 0x40001 bytes of args->nr_local, causing order >= MAX_ORDER condition. The exact value 0x40001 can be checked with UIO_MAXIOV which is 0x400. So for kcalloc() 0x400 iovecs with sizeof(struct rds_iovec) = 0x10 is the closest limit, with 0x10 leftover. Same condition is currently done in rds_cmsg_rdma_args(). [1] WARNING: mm/page_alloc.c:5011 [..] Call Trace: alloc_pages_current+0x18c/0x2a0 mm/mempolicy.c:2267 alloc_pages include/linux/gfp.h:547 [inline] kmalloc_order+0x2e/0xb0 mm/slab_common.c:837 kmalloc_order_trace+0x14/0x120 mm/slab_common.c:853 kmalloc_array include/linux/slab.h:592 [inline] kcalloc include/linux/slab.h:621 [inline] rds_rdma_extra_size+0xb2/0x3b0 net/rds/rdma.c:568 rds_rm_size net/rds/send.c:928 [inline] Reported-by: syzbot+1bd2b07f93745fa38425@syzkaller.appspotmail.com Signed-off-by: Sabyrzhan Tasbolatov <snovitoll@gmail.com> Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com> Link: https://lore.kernel.org/r/20210201203233.1324704-1-snovitoll@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
* rds: stop using dmapoolChristoph Hellwig2020-11-175-69/+101
| | | | | | | | | | | | | RDMA ULPs should only perform DMA through the ib_dma_* API instead of using the hidden dma_device directly. In addition using the dma coherent API family that dmapool is a part of can be very ineffcient on plaforms that are not DMA coherent. Switch to use slab allocations and the ib_dma_* APIs instead. Link: https://lore.kernel.org/r/20201106181941.1878556-6-hch@lst.de Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
* Merge branch 'for-rc' into rdma.gitJason Gunthorpe2020-11-171-2/+3
|\ | | | | | | | | | | | | | | From https://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma.git The rc RDMA branch is needed due to dependencies on the next patches. Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
| * RDMA: Add rdma_connect_locked()Jason Gunthorpe2020-10-281-2/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There are two flows for handling RDMA_CM_EVENT_ROUTE_RESOLVED, either the handler triggers a completion and another thread does rdma_connect() or the handler directly calls rdma_connect(). In all cases rdma_connect() needs to hold the handler_mutex, but when handler's are invoked this is already held by the core code. This causes ULPs using the 2nd method to deadlock. Provide a rdma_connect_locked() and have all ULPs call it from their handlers. Link: https://lore.kernel.org/r/0-v2-53c22d5c1405+33-rdma_connect_locking_jgg@nvidia.com Reported-and-tested-by: Guoqing Jiang <guoqing.jiang@cloud.ionos.com> Fixes: 2a7cec538169 ("RDMA/cma: Fix locking for the RDMA_CM_CONNECT state") Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com> Acked-by: Jack Wang <jinpu.wang@cloud.ionos.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Max Gurtovoy <mgurtovoy@nvidia.com> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
* | RDMA: Lift ibdev_to_node from rds to common codeChristoph Hellwig2020-11-121-7/+0
|/ | | | | | | | Lift the ibdev_to_node from rds to common code and document it. Link: https://lore.kernel.org/r/20201106181941.1878556-4-hch@lst.de Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
* net/rds: suppress page allocation failure error in recv buffer refillManjunath Patil2020-10-091-3/+3
| | | | | | | | | | | | | RDS/IB tries to refill the recv buffer in softirq context using GFP_NOWAIT flag. However alloc failure is handled by queueing a work to refill the recv buffer with GFP_KERNEL flag. This means failure to allocate with GFP_NOWAIT isn't fatal. Do not print the PAF warnings if softirq context fails to refill the recv buffer. We will see the PAF warnings when worker also fails to allocate. Signed-off-by: Manjunath Patil <manjunath.b.patil@oracle.com> Reviewed-by: Aruna Ramakrishna <aruna.ramakrishna@oracle.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
* RDS: drop double zeroingJulia Lawall2020-09-201-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | sg_init_table zeroes its first argument, so the allocation of that argument doesn't have to. the semantic patch that makes this change is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ expression x,n,flags; @@ x = - kcalloc + kmalloc_array (n,sizeof(*x),flags) ... sg_init_table(x,n) // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: rds: delete duplicated wordsRandy Dunlap2020-09-182-2/+2
| | | | | | | | | | | | Drop repeated words in net/rds/. Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jakub Kicinski <kuba@kernel.org> Cc: Santosh Shilimkar <santosh.shilimkar@oracle.com> Cc: linux-rdma@vger.kernel.org Cc: rds-devel@oss.oracle.com Signed-off-by: David S. Miller <davem@davemloft.net>
* treewide: Use fallthrough pseudo-keywordGustavo A. R. Silva2020-08-231-1/+1
| | | | | | | | | | Replace the existing /* fall through */ comments and its variants with the new pseudo-keyword macro fallthrough[1]. Also, remove unnecessary fall-through markings when it is the case. [1] https://www.kernel.org/doc/html/v5.7/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netDavid S. Miller2020-08-021-1/+2
|\ | | | | | | | | | | | | Resolved kernel/bpf/btf.c using instructions from merge commit 69138b34a7248d2396ab85c8652e20c0c39beaba Signed-off-by: David S. Miller <davem@davemloft.net>
| * rds: Prevent kernel-infoleak in rds_notify_queue_get()Peilin Ye2020-07-311-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | rds_notify_queue_get() is potentially copying uninitialized kernel stack memory to userspace since the compiler may leave a 4-byte hole at the end of `cmsg`. In 2016 we tried to fix this issue by doing `= { 0 };` on `cmsg`, which unfortunately does not always initialize that 4-byte hole. Fix it by using memset() instead. Cc: stable@vger.kernel.org Fixes: f037590fff30 ("rds: fix a leak of kernel memory") Fixes: bdbe6fbc6a2f ("RDS: recv.c") Suggested-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Peilin Ye <yepeilin.cs@gmail.com> Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net: pass a sockptr_t into ->setsockoptChristoph Hellwig2020-07-243-27/+23
| | | | | | | | | | | | | | | | | | | | | | Rework the remaining setsockopt code to pass a sockptr_t instead of a plain user pointer. This removes the last remaining set_fs(KERNEL_DS) outside of architecture specific code. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Stefan Schmidt <stefan@datenfreihafen.org> [ieee802154] Acked-by: Matthieu Baerts <matthieu.baerts@tessares.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net: rds: rdma_transport.h: delete duplicated wordRandy Dunlap2020-07-191-1/+1
|/ | | | | | | | | | Delete the doubled word "be" in a comment. Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Cc: Santosh Shilimkar <santosh.shilimkar@oracle.com> Cc: netdev@vger.kernel.org Cc: linux-rdma@vger.kernel.org Signed-off-by: David S. Miller <davem@davemloft.net>
* rds: If one path needs re-connection, check all and re-connectRao Shoaib2020-07-013-1/+20
| | | | | | | | | | | | | | | | | | In testing with mprds enabled, Oracle Cluster nodes after reboot were not able to communicate with others nodes and so failed to rejoin the cluster. Peers with lower IP address initiated connection but the node could not respond as it choose a different path and could not initiate a connection as it had a higher IP address. With this patch, when a node sends out a packet and the selected path is down, all other paths are also checked and any down paths are re-connected. Reviewed-by: Ka-cheong Poon <ka-cheong.poon@oracle.com> Reviewed-by: David Edmondson <david.edmondson@oracle.com> Signed-off-by: Somasundaram Krishnasamy <somasundaram.krishnasamy@oracle.com> Signed-off-by: Rao Shoaib <rao.shoaib@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* rds: transport module should be auto loaded when transport is setRao Shoaib2020-06-251-9/+17
| | | | | | | | | | | This enhancement auto loads transport module when the transport is set via SO_RDS_TRANSPORT socket option. Reviewed-by: Ka-Cheong Poon <ka-cheong.poon@oracle.com> Reviewed-by: Håkon Bugge <haakon.bugge@oracle.com> Signed-off-by: Rao Shoaib <rao.shoaib@oracle.com> Signed-off-by: Somasundaram Krishnasamy <somasundaram.krishnasamy@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net/rds: NULL pointer de-reference in rds_ib_add_one()Ka-Cheong Poon2020-06-151-1/+7
| | | | | | | | | The parent field of a struct device may be NULL. The macro ibdev_to_node() should check for that. Signed-off-by: Ka-Cheong Poon <ka-cheong.poon@oracle.com> Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* treewide: replace '---help---' in Kconfig files with 'help'Masahiro Yamada2020-06-141-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | Since commit 84af7a6194e4 ("checkpatch: kconfig: prefer 'help' over '---help---'"), the number of '---help---' has been gradually decreasing, but there are still more than 2400 instances. This commit finishes the conversion. While I touched the lines, I also fixed the indentation. There are a variety of indentation styles found. a) 4 spaces + '---help---' b) 7 spaces + '---help---' c) 8 spaces + '---help---' d) 1 space + 1 tab + '---help---' e) 1 tab + '---help---' (correct indentation) f) 1 tab + 1 space + '---help---' g) 1 tab + 2 spaces + '---help---' In order to convert all of them to 1 tab + 'help', I ran the following commend: $ find . -name 'Kconfig*' | xargs sed -i 's/^[[:space:]]*---help---/\thelp/' Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
* Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdmaLinus Torvalds2020-06-058-332/+38
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull rdma updates from Jason Gunthorpe: "A more active cycle than most of the recent past, with a few large, long discussed works this time. The RNBD block driver has been posted for nearly two years now, and flowing through RDMA due to it also introducing a new ULP. The removal of FMR has been a recurring discussion theme for a long time. And the usual smattering of features and bug fixes. Summary: - Various small driver bugs fixes in rxe, mlx5, hfi1, and efa - Continuing driver cleanups in bnxt_re, hns - Big cleanup of mlx5 QP creation flows - More consistent use of src port and flow label when LAG is used and a mlx5 implementation - Additional set of cleanups for IB CM - 'RNBD' network block driver and target. This is a network block RDMA device specific to ionos's cloud environment. It brings strong multipath and resiliency capabilities. - Accelerated IPoIB for HFI1 - QP/WQ/SRQ ioctl migration for uverbs, and support for multiple async fds - Support for exchanging the new IBTA defiend ECE data during RDMA CM exchanges - Removal of the very old and insecure FMR interface from all ULPs and drivers. FRWR should be preferred for at least a decade now" * tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma: (247 commits) RDMA/cm: Spurious WARNING triggered in cm_destroy_id() RDMA/mlx5: Return ECE DC support RDMA/mlx5: Don't rely on FW to set zeros in ECE response RDMA/mlx5: Return an error if copy_to_user fails IB/hfi1: Use free_netdev() in hfi1_netdev_free() RDMA/hns: Uninitialized variable in modify_qp_init_to_rtr() RDMA/core: Move and rename trace_cm_id_create() IB/hfi1: Fix hfi1_netdev_rx_init() error handling RDMA: Remove 'max_map_per_fmr' RDMA: Remove 'max_fmr' RDMA/core: Remove FMR device ops RDMA/rdmavt: Remove FMR memory registration RDMA/mthca: Remove FMR support for memory registration RDMA/mlx4: Remove FMR support for memory registration RDMA/i40iw: Remove FMR leftovers RDMA/bnxt_re: Remove FMR leftovers RDMA/mlx5: Remove FMR leftovers RDMA/core: Remove FMR pool API RDMA/rds: Remove FMR support for memory registration RDMA/srp: Remove support for FMR memory registration ...
| * RDMA: Remove 'max_fmr'Jason Gunthorpe2020-06-021-1/+1
| | | | | | | | | | | | | | | | | | | | Now that FMR support is gone, this attribute can be deleted from all places. Link: https://lore.kernel.org/r/12-v3-f58e6669d5d3+2cf-fmr_removal_jgg@mellanox.com Reviewed-by: Max Gurtovoy <maxg@mellanox.com> Reviewed-by: Bernard Metzler <bmt@zurich.ibm.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
| * RDMA/rds: Remove FMR support for memory registrationMax Gurtovoy2020-06-028-322/+21
| | | | | | | | | | | | | | | | | | Use FRWR method for memory registration by default and remove the ancient and unsafe FMR method. Link: https://lore.kernel.org/r/3-v3-f58e6669d5d3+2cf-fmr_removal_jgg@mellanox.com Signed-off-by: Max Gurtovoy <maxg@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
| * RDMA/cma: Provide ECE reject reasonLeon Romanovsky2020-05-271-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | IBTA declares "vendor option not supported" reject reason in REJ messages if passive side doesn't want to accept proposed ECE options. Due to the fact that ECE is managed by userspace, there is a need to let users to provide such rejected reason. Link: https://lore.kernel.org/r/20200526103304.196371-7-leon@kernel.org Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
| * Merge tag 'v5.7-rc6' into rdma.git for-nextJason Gunthorpe2020-05-214-65/+51
| |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Linux 5.7-rc6 Conflict in drivers/net/ethernet/mellanox/mlx5/core/steering/dr_send.c resolved by deleting dr_cq_event, matching how netdev resolved it. Required for dependencies in the following patches. Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
| * | RDMA: Allow ib_client's to fail when add() is calledJason Gunthorpe2020-05-061-8/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When a client is added it isn't allowed to fail, but all the client's have various failure paths within their add routines. This creates the very fringe condition where the client was added, failed during add and didn't set the client_data. The core code will then still call other client_data centric ops like remove(), rename(), get_nl_info(), and get_net_dev_by_params() with NULL client_data - which is confusing and unexpected. If the add() callback fails, then do not call any more client ops for the device, even remove. Remove all the now redundant checks for NULL client_data in ops callbacks. Update all the add() callbacks to return error codes appropriately. EOPNOTSUPP is used for cases where the ULP does not support the ib_device - eg because it only works with IB. Link: https://lore.kernel.org/r/20200421172440.387069-1-leon@kernel.org Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Acked-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
* | | tcp: add tcp_sock_set_keepcntChristoph Hellwig2020-05-282-15/+4
| | | | | | | | | | | | | | | | | | | | | | | | Add a helper to directly set the TCP_KEEPCNT sockopt from kernel space without going through a fake uaccess. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | tcp: add tcp_sock_set_keepintvlChristoph Hellwig2020-05-281-3/+1
| | | | | | | | | | | | | | | | | | | | | | | | Add a helper to directly set the TCP_KEEPINTVL sockopt from kernel space without going through a fake uaccess. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | tcp: add tcp_sock_set_keepidleChristoph Hellwig2020-05-281-4/+1
| | | | | | | | | | | | | | | | | | | | | | | | Add a helper to directly set the TCP_KEEP_IDLE sockopt from kernel space without going through a fake uaccess. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | tcp: add tcp_sock_set_nodelayChristoph Hellwig2020-05-283-12/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a helper to directly set the TCP_NODELAY sockopt from kernel space without going through a fake uaccess. Cleanup the callers to avoid pointless wrappers now that this is a simple function call. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Sagi Grimberg <sagi@grimberg.me> Acked-by: Jason Gunthorpe <jgg@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | tcp: add tcp_sock_set_corkChristoph Hellwig2020-05-281-7/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | Add a helper to directly set the TCP_CORK sockopt from kernel space without going through a fake uaccess. Cleanup the callers to avoid pointless wrappers now that this is a simple function call. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | net: add sock_set_keepaliveChristoph Hellwig2020-05-281-5/+1
| | | | | | | | | | | | | | | | | | | | | | | | Add a helper to directly set the SO_KEEPALIVE sockopt from kernel space without going through a fake uaccess. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | net: add sock_no_lingerChristoph Hellwig2020-05-283-14/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a helper to directly set the SO_LINGER sockopt from kernel space with onoff set to true and a linger time of 0 without going through a fake uaccess. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | rds: fix crash in rds_info_getsockopt()John Hubbard2020-05-201-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The conversion to pin_user_pages() had a bug: it overlooked the case of allocation of pages failing. Fix that by restoring an equivalent check. Reported-by: syzbot+118ac0af4ac7f785a45b@syzkaller.appspotmail.com Fixes: dbfe7d74376e ("rds: convert get_user_pages() --> pin_user_pages()") Cc: David S. Miller <davem@davemloft.net> Cc: Jakub Kicinski <kuba@kernel.org> Cc: netdev@vger.kernel.org Cc: linux-rdma@vger.kernel.org Cc: rds-devel@oss.oracle.com Signed-off-by: John Hubbard <jhubbard@nvidia.com> Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | rds: convert get_user_pages() --> pin_user_pages()John Hubbard2020-05-171-4/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This code was using get_user_pages_fast(), in a "Case 2" scenario (DMA/RDMA), using the categorization from [1]. That means that it's time to convert the get_user_pages_fast() + put_page() calls to pin_user_pages_fast() + unpin_user_pages() calls. There is some helpful background in [2]: basically, this is a small part of fixing a long-standing disconnect between pinning pages, and file systems' use of those pages. [1] Documentation/core-api/pin_user_pages.rst [2] "Explicit pinning of user-space pages": https://lwn.net/Articles/807108/ Cc: David S. Miller <davem@davemloft.net> Cc: Jakub Kicinski <kuba@kernel.org> Cc: netdev@vger.kernel.org Cc: linux-rdma@vger.kernel.org Cc: rds-devel@oss.oracle.com Signed-off-by: John Hubbard <jhubbard@nvidia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | Merge branch 'work.sysctl' of ↵Daniel Borkmann2020-04-281-4/+2
|\ \ \ | |_|/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull in Christoph Hellwig's series that changes the sysctl's ->proc_handler methods to take kernel pointers instead. It gets rid of the set_fs address space overrides used by BPF. As per discussion, pull in the feature branch into bpf-next as it relates to BPF sysctl progs. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20200427071508.GV23230@ZenIV.linux.org.uk/T/
| * | sysctl: pass kernel pointers to ->proc_handlerChristoph Hellwig2020-04-271-4/+2
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | Instead of having all the sysctl handlers deal with user pointers, which is rather hairy in terms of the BPF interaction, copy the input to and from userspace in common code. This also means that the strings are always NUL-terminated by the common code, making the API a little bit safer. As most handler just pass through the data to one of the common handlers a lot of the changes are mechnical. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Andrey Ignatov <rdna@fb.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | net/rds: Use ERR_PTR for rds_message_alloc_sgs()Jason Gunthorpe2020-04-154-21/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Returning the error code via a 'int *ret' when the function returns a pointer is very un-kernely and causes gcc 10's static analysis to choke: net/rds/message.c: In function ‘rds_message_map_pages’: net/rds/message.c:358:10: warning: ‘ret’ may be used uninitialized in this function [-Wmaybe-uninitialized] 358 | return ERR_PTR(ret); Use a typical ERR_PTR return instead. Signed-off-by: Jason Gunthorpe <jgg@mellanox.com> Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net/rds: Fix MR reference counting problemKa-Cheong Poon2020-04-092-21/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In rds_free_mr(), it calls rds_destroy_mr(mr) directly. But this defeats the purpose of reference counting and makes MR free handling impossible. It means that holding a reference does not guarantee that it is safe to access some fields. For example, In rds_cmsg_rdma_dest(), it increases the ref count, unlocks and then calls mr->r_trans->sync_mr(). But if rds_free_mr() (and rds_destroy_mr()) is called in between (there is no lock preventing this to happen), r_trans_private is set to NULL, causing a panic. Similar issue is in rds_rdma_unuse(). Reported-by: zerons <sironhide0null@gmail.com> Signed-off-by: Ka-Cheong Poon <ka-cheong.poon@oracle.com> Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net/rds: Replace struct rds_mr's r_refcount with struct krefKa-Cheong Poon2020-04-093-23/+20
|/ | | | | | | | And removed rds_mr_put(). Signed-off-by: Ka-Cheong Poon <ka-cheong.poon@oracle.com> Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net/rds: Track user mapped pages through special APILeon Romanovsky2020-02-161-12/+12
| | | | | | | | | | | | | | | | | | | | | | | Convert net/rds to use the newly introduces pin_user_pages() API, which properly sets FOLL_PIN. Setting FOLL_PIN is now required for code that requires tracking of pinned pages. Note that this effectively changes the code's behavior: it now ultimately calls set_page_dirty_lock(), instead of set_page_dirty(). This is probably more accurate. As Christoph Hellwig put it, "set_page_dirty() is only safe if we are dealing with a file backed page where we have reference on the inode it hangs off." [1] [1] https://lore.kernel.org/r/20190723153640.GB720@lst.de Cc: Hans Westgaard Ry <hans.westgaard.ry@oracle.com> Cc: Santosh Shilimkar <santosh.shilimkar@oracle.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: John Hubbard <jhubbard@nvidia.com> Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net/rds: Use prefetch for On-Demand-Paging MRHans Westgaard Ry2020-01-181-0/+9
| | | | | | | | | Try prefetching pages when using On-Demand-Paging MR using ib_advise_mr. Signed-off-by: Hans Westgaard Ry <hans.westgaard.ry@oracle.com> Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
* net/rds: Handle ODP mr registration/unregistrationHans Westgaard Ry2020-01-187-56/+244
| | | | | | | | | On-Demand-Paging MRs are registered using ib_reg_user_mr and unregistered with ib_dereg_mr. Signed-off-by: Hans Westgaard Ry <hans.westgaard.ry@oracle.com> Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
* net/rds: Detect need of On-Demand-Paging memory registrationHans Westgaard Ry2020-01-161-2/+4
| | | | | | | | | Add code to check if memory intended for RDMA is FS-DAX-memory. RDS will fail with error code EOPNOTSUPP if FS-DAX-memory is detected. Signed-off-by: Hans Westgaard Ry <hans.westgaard.ry@oracle.com> Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netDavid S. Miller2019-11-161-8/+15
|\ | | | | | | | | | | | | Lots of overlapping changes and parallel additions, stuff like that. Signed-off-by: David S. Miller <davem@davemloft.net>
| * rds: ib: update WR sizes when bringing up connectionDag Moxnes2019-11-161-8/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently WR sizes are updated from rds_ib_sysctl_max_send_wr and rds_ib_sysctl_max_recv_wr when a connection is shut down. As a result, a connection being down while rds_ib_sysctl_max_send_wr or rds_ib_sysctl_max_recv_wr are updated, will not update the sizes when it comes back up. Move resizing of WRs to rds_ib_setup_qp so that connections will be setup with the most current WR sizes. Signed-off-by: Dag Moxnes <dag.moxnes@oracle.com> Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net/rds: Remove unnecessary null checkYueHaibing2019-10-171-2/+1
| | | | | | | | | | | | | | | | Null check before dma_pool_destroy is redundant, so remove it. This is detected by coccinelle. Signed-off-by: YueHaibing <yuehaibing@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net/rds: Add missing include fileYueHaibing2019-10-062-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix build error: net/rds/ib_cm.c: In function rds_dma_hdrs_alloc: net/rds/ib_cm.c:475:13: error: implicit declaration of function dma_pool_zalloc; did you mean mempool_alloc? [-Werror=implicit-function-declaration] hdrs[i] = dma_pool_zalloc(pool, GFP_KERNEL, &hdr_daddrs[i]); ^~~~~~~~~~~~~~~ mempool_alloc net/rds/ib.c: In function rds_ib_dev_free: net/rds/ib.c:111:3: error: implicit declaration of function dma_pool_destroy; did you mean mempool_destroy? [-Werror=implicit-function-declaration] dma_pool_destroy(rds_ibdev->rid_hdrs_pool); ^~~~~~~~~~~~~~~~ mempool_destroy Reported-by: Hulk Robot <hulkci@huawei.com> Fixes: 9b17f5884be4 ("net/rds: Use DMA memory pool allocation for rds_header") Signed-off-by: YueHaibing <yuehaibing@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netDavid S. Miller2019-10-051-3/+3
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| * net/rds: Fix error handling in rds_ib_add_one()Dotan Barak2019-10-021-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | rds_ibdev:ipaddr_list and rds_ibdev:conn_list are initialized after allocation some resources such as protection domain. If allocation of such resources fail, then these uninitialized variables are accessed in rds_ib_dev_free() in failure path. This can potentially crash the system. The code has been updated to initialize these variables very early in the function. Signed-off-by: Dotan Barak <dotanb@dev.mellanox.co.il> Signed-off-by: Sudhakar Dindukurti <sudhakar.dindukurti@oracle.com> Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net/rds: Use DMA memory pool allocation for rds_headerKa-Cheong Poon2019-10-035-61/+153
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, RDS calls ib_dma_alloc_coherent() to allocate a large piece of contiguous DMA coherent memory to store struct rds_header for sending/receiving packets. The memory allocated is then partitioned into struct rds_header. This is not necessary and can be costly at times when memory is fragmented. Instead, RDS should use the DMA memory pool interface to handle this. The DMA addresses of the pre- allocated headers are stored in an array. At send/receive ring initialization and refill time, this arrary is de-referenced to get the DMA addresses. This array is not accessed at send/receive packet processing. Suggested-by: Håkon Bugge <haakon.bugge@oracle.com> Signed-off-by: Ka-Cheong Poon <ka-cheong.poon@oracle.com> Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net/rds: Log vendor error if send/recv Work requests failSudhakar Dindukurti2019-10-022-4/+5
|/ | | | | | | | | Log vendor error if work requests fail. Vendor error provides more information that is used for debugging the issue. Signed-off-by: Sudhakar Dindukurti <sudhakar.dindukurti@oracle.com> Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net/rds: Check laddr_check before calling itKa-Cheong Poon2019-09-271-1/+4
| | | | | | | | | | | In rds_bind(), laddr_check is called without checking if it is NULL or not. And rs_transport should be reset if rds_add_bound() fails. Fixes: c5c1a030a7db ("net/rds: An rds_sock is added too early to the hash table") Reported-by: syzbot+fae39afd2101a17ec624@syzkaller.appspotmail.com Signed-off-by: Ka-Cheong Poon <ka-cheong.poon@oracle.com> Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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