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path: root/drivers/infiniband/sw/rxe/rxe_mw.c
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2024-01-25RDMA/rxe: Improve newline in printing messagesLi Zhijian
Previously rxe_{dbg,info,err}() macros are appended built-in newline, but some users will add redundant newline sometimes. So remove the built-in newline for these macros. In terms of rxe_{dbg,info,err}_xxx() macros, because they don't have built-in newline, append newline when using them. CC: Daisuke Matsuda <matsuda-daisuke@fujitsu.com> Reviewed-by: Daisuke Matsuda <matsuda-daisuke@fujitsu.com> Acked-by: Zhu Yanjun <zyjzyj2000@gmail.com> Signed-off-by: Li Zhijian <lizhijian@fujitsu.com> Link: https://lore.kernel.org/r/20240109083253.3629967-1-lizhijian@fujitsu.com Signed-off-by: Leon Romanovsky <leon@kernel.org>
2023-07-18RDMA/rxe: Fix an error handling path in rxe_bind_mw()Christophe JAILLET
All errors go to the error handling path, except this one. Be consistent and also branch to it. Fixes: 02ed253770fb ("RDMA/rxe: Introduce rxe access supported flags") Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Link: https://lore.kernel.org/r/43698d8a3ed4e720899eadac887427f73d7ec2eb.1689623735.git.christophe.jaillet@wanadoo.fr Reviewed-by: Bob Pearson <rpearsonhpe@gmail.com> Acked-by: Zhu Yanjun <zyjzyj2000@gmail.com> Signed-off-by: Leon Romanovsky <leon@kernel.org>
2023-06-09RDMA/rxe: Introduce rxe access supported flagsBob Pearson
Introduce supported bit masks for setting the access attributes of MWs, MRs, and QPs. Check these when attributes are set. Link: https://lore.kernel.org/r/20230530221334.89432-5-rpearsonhpe@gmail.com Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
2023-06-09RDMA/rxe: Fix access checks in rxe_check_bind_mwBob Pearson
The subroutine rxe_check_bind_mw() in rxe_mw.c performs checks on the mw access flags before they are set so they always succeed. This patch instead checks the access flags passed in the send wqe. Fixes: 32a577b4c3a9 ("RDMA/rxe: Add support for bind MW work requests") Link: https://lore.kernel.org/r/20230530221334.89432-4-rpearsonhpe@gmail.com Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
2022-11-10RDMA/rxe: Replace pr_xxx by rxe_dbg_xxx in rxe_mw.cBob Pearson
Replace calls to pr_xxx() int rxe_mw.c with rxe_dbg_xxx(). Link: https://lore.kernel.org/r/20221103171013.20659-6-rpearsonhpe@gmail.com Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
2022-10-28RDMA/rxe: Make sure requested access is a subset of {mr,mw}->accessLi Zhijian
We should reject the requests with access flags that is not registered by MR/MW. For example, lookup_mr() should return NULL when requested access is 0x03 and mr->access is 0x01. Link: https://lore.kernel.org/r/20220927055337.22630-2-lizhijian@fujitsu.com Signed-off-by: Li Zhijian <lizhijian@fujitsu.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
2022-09-22RDMA/rxe: Use members of generic struct in rxe_mrDaisuke Matsuda
rxe_mr and ib_mr have interchangeable members. Remove device specific members and use ones in the generic struct. Both 'iova' and 'length' are filled in ib_uverbs or ib_core layer after MR registration. Signed-off-by: Daisuke Matsuda <matsuda-daisuke@fujitsu.com> Link: https://lore.kernel.org/r/20220921080844.1616883-2-matsuda-daisuke@fujitsu.com Signed-off-by: Leon Romanovsky <leon@kernel.org>
2022-07-27Revert "RDMA/rxe: Create duplicate mapping tables for FMRs"Li Zhijian
Below 2 commits will be reverted: commit 8ff5f5d9d8cf ("RDMA/rxe: Prevent double freeing rxe_map_set()") commit 647bf13ce944 ("RDMA/rxe: Create duplicate mapping tables for FMRs") The community has a few bug reports which pointed this commit at last. Some proposals are raised up in the meantime but all of them have no follow-up operation. The previous commit led the map_set of FMR to be not available any more if the MR is registered again after invalidating. Although the mentioned patch try to fix a potential race in building/accessing the same table for fast memory regions, it broke rtrs etc ULPs. Since the latter could be worse, revert this patch. With previous commit, it's observed that a same MR in rnbd server will trigger below code path: -> rxe_mr_init_fast() |-> alloc map_set() # map_set is uninitialized |...-> rxe_map_mr_sg() # build the map_set |-> rxe_mr_set_page() |...-> rxe_reg_fast_mr() # mr->state change to VALID from FREE that means # we can access host memory(such rxe_mr_copy) |...-> rxe_invalidate_mr() # mr->state change to FREE from VALID |...-> rxe_reg_fast_mr() # mr->state change to VALID from FREE, # but map_set was not built again |...-> rxe_mr_copy() # kernel crash due to access wild addresses # that lookup from the map_set The backtraces are not always identical. [1st]---------- RIP: 0010:lookup_iova+0x66/0xa0 [rdma_rxe] Code: 00 00 00 48 d3 ee 89 32 c3 4c 8b 18 49 8b 3b 48 8b 47 08 48 39 c6 72 38 48 29 c6 45 31 d2 b8 01 00 00 00 48 63 c8 48 c1 e1 04 <48> 8b 4c 0f 08 48 39 f1 77 21 83 c0 01 48 29 ce 3d 00 01 00 00 75 RSP: 0018:ffffb7ff80063bf0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff9b9949d86800 RCX: 0000000000000000 RDX: ffffb7ff80063c00 RSI: 0000000049f6b378 RDI: 002818da00000004 RBP: 0000000000000120 R08: ffffb7ff80063c08 R09: ffffb7ff80063c04 R10: 0000000000000002 R11: ffff9b9916f7eef8 R12: ffff9b99488a0038 R13: ffff9b99488a0038 R14: ffff9b9914fb346a R15: ffff9b990ab27000 FS: 0000000000000000(0000) GS:ffff9b997dc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007efc33a98ed0 CR3: 0000000014f32004 CR4: 00000000001706f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> rxe_mr_copy.part.0+0x6f/0x140 [rdma_rxe] rxe_responder+0x12ee/0x1b60 [rdma_rxe] ? rxe_icrc_check+0x7e/0x100 [rdma_rxe] ? rxe_rcv+0x1d0/0x780 [rdma_rxe] ? rxe_icrc_hdr.isra.0+0xf6/0x160 [rdma_rxe] rxe_do_task+0x67/0xb0 [rdma_rxe] rxe_xmit_packet+0xc7/0x210 [rdma_rxe] rxe_requester+0x680/0xee0 [rdma_rxe] ? update_load_avg+0x5f/0x690 ? update_load_avg+0x5f/0x690 ? rtrs_clt_recv_done+0x1b/0x30 [rtrs_client] [2nd]---------- RIP: 0010:rxe_mr_copy.part.0+0xa8/0x140 [rdma_rxe] Code: 00 00 49 c1 e7 04 48 8b 00 4c 8d 2c d0 48 8b 44 24 10 4d 03 7d 00 85 ed 7f 10 eb 6c 89 54 24 0c 49 83 c7 10 31 c0 85 ed 7e 5e <49> 8b 3f 8b 14 24 4c 89 f6 48 01 c7 85 d2 74 06 48 89 fe 4c 89 f7 RSP: 0018:ffffae3580063bf8 EFLAGS: 00010202 RAX: 0000000000018978 RBX: ffff9d7ef7a03600 RCX: 0000000000000008 RDX: 000000000000007c RSI: 000000000000007c RDI: ffff9d7ef7a03600 RBP: 0000000000000120 R08: ffffae3580063c08 R09: ffffae3580063c04 R10: ffff9d7efece0038 R11: ffff9d7ec4b1db00 R12: ffff9d7efece0038 R13: ffff9d7ef4098260 R14: ffff9d7f11e23c6a R15: 4c79500065708144 FS: 0000000000000000(0000) GS:ffff9d7f3dc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fce47276c60 CR3: 0000000003f66004 CR4: 00000000001706f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> rxe_responder+0x12ee/0x1b60 [rdma_rxe] ? rxe_icrc_check+0x7e/0x100 [rdma_rxe] ? rxe_rcv+0x1d0/0x780 [rdma_rxe] ? rxe_icrc_hdr.isra.0+0xf6/0x160 [rdma_rxe] rxe_do_task+0x67/0xb0 [rdma_rxe] rxe_xmit_packet+0xc7/0x210 [rdma_rxe] rxe_requester+0x680/0xee0 [rdma_rxe] ? update_load_avg+0x5f/0x690 ? update_load_avg+0x5f/0x690 ? rtrs_clt_recv_done+0x1b/0x30 [rtrs_client] rxe_do_task+0x67/0xb0 [rdma_rxe] tasklet_action_common.constprop.0+0x92/0xc0 __do_softirq+0xe1/0x2d8 run_ksoftirqd+0x21/0x30 smpboot_thread_fn+0x183/0x220 ? sort_range+0x20/0x20 kthread+0xe2/0x110 ? kthread_complete_and_exit+0x20/0x20 ret_from_fork+0x22/0x30 Link: https://lore.kernel.org/r/1658805386-2-1-git-send-email-lizhijian@fujitsu.com Link: https://lore.kernel.org/all/20220210073655.42281-1-guoqing.jiang@linux.dev/T/ Link: https://www.spinics.net/lists/linux-rdma/msg110836.html Link: https://lore.kernel.org/lkml/94a5ea93-b8bb-3a01-9497-e2021f29598a@linux.dev/t/ Tested-by: Md Haris Iqbal <haris.iqbal@ionos.com> Reviewed-by: Bob Pearson <rpearsonhpe@gmail.com> Signed-off-by: Li Zhijian <lizhijian@fujitsu.com> Signed-off-by: Leon Romanovsky <leon@kernel.org>
2022-07-21RDMA/rxe: Fix mw bind to allow any consumer key portionBob Pearson
The current implementation of rxe_check_bind_mw() in rxe_mw.c is incorrect since it requires the new key portion provided by the mw consumer to be different than the previous key portion. This is not required by the IBA. Remove the test. Link: https://lore.kernel.org/linux-rdma/fb4614e7-4cac-0dc7-3ef7-766dfd10e8f2@gmail.com/ Fixes: 32a577b4c3a9 ("Add support for bind MW work requests") Link: https://lore.kernel.org/r/20220714204619.13396-1-rpearsonhpe@gmail.com Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
2022-07-21RDMA/rxe: Fix spelling mistake in error printZhang Jiaming
There is a spelling mistake (writeable) in function rxe_check_bind_mw. Fix it. Signed-off-by: Zhang Jiaming <jiaming@nfschina.com> Reviewed-by: Bob Pearson <rpearsonhpe@gmail.com> Signed-off-by: Leon Romanovsky <leon@kernel.org>
2022-07-04IB: Fix spelling of 'writable'Zhang Jiaming
There is a typo (writeable) in qib_file_ops.c, qib_sd7220.c's comments, and in rxe_check_bind_mw() Link: https://lore.kernel.org/r/20220701074812.12615-1-jiaming@nfschina.com Link: https://lore.kernel.org/r/20220701080019.13329-1-jiaming@nfschina.com Signed-off-by: Zhang Jiaming <jiaming@nfschina.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
2022-06-30RDMA/rxe: Stop lookup of partially built objectsBob Pearson
Currently the rdma_rxe driver has a security weakness due to giving objects which are partially initialized indices allowing external actors to gain access to them by sending packets which refer to their index (e.g. qpn, rkey, etc) causing unpredictable results. This patch adds a new API rxe_finalize(obj) which enables looking up pool objects from indices using rxe_pool_get_index() for AH, QP, MR, and MW. They are added in create verbs only after the objects are fully initialized. It also adds wait for completion to destroy/dealloc verbs to assure that all references have been dropped before returning to rdma_core by implementing a new rxe_pool API rxe_cleanup() which drops a reference to the object and then waits for all other references to be dropped. When the last reference is dropped the object is completed by kref. After that it cleans up the object and if locally allocated frees the memory. In the special case of address handle objects the delay is implemented separately if the destroy_ah call is not sleepable. Combined with deferring cleanup code to type specific cleanup routines this allows all pending activity referring to objects to complete before returning to rdma_core. Link: https://lore.kernel.org/r/20220612223434.31462-2-rpearsonhpe@gmail.com Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
2022-05-09RDMA/rxe: Move mw cleanup code to rxe_mw_cleanup()Bob Pearson
Move code from rxe_dealloc_mw() to rxe_mw_cleanup() to allow flows which hold a reference to mw to complete. Link: https://lore.kernel.org/r/20220421014042.26985-7-rpearsonhpe@gmail.com Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
2022-04-08RDMA/rxe: Remove type 2A memory window capabilityBob Pearson
Currently the rdma_rxe driver claims to support both 2A and 2B type memory windows. But the IBA requires 010-37.2.31: If an HCA supports the Base Memory Management extensions, the HCA shall support either Type 2A or Type 2B MWs, but not both. This commit removes the device capability bit for type 2A memory windows and adds a clarifying comment to rxe_mw.c. Link: https://lore.kernel.org/r/20220407184321.14207-1-rpearsonhpe@gmail.com Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
2022-03-16RDMA/rxe: Use standard names for ref countingBob Pearson
Rename rxe_add_ref() to rxe_get() and rxe_drop_ref() to rxe_put(). Significantly improves readability for new readers. Link: https://lore.kernel.org/r/20220304000808.225811-10-rpearsonhpe@gmail.com Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
2022-03-16RDMA/rxe: Replace red-black trees by xarraysBob Pearson
Currently the rxe driver uses red-black trees to add indices to the rxe object pools. Linux xarrays provide a better way to implement the same functionality for indices. This patch replaces red-black trees by xarrays for pool objects. Since xarrays already have a spinlock use that in place of the pool rwlock. Make sure that all changes in the xarray(index) and kref(ref counnt) occur atomically. Link: https://lore.kernel.org/r/20220304000808.225811-9-rpearsonhpe@gmail.com Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
2021-11-19RDMA/rxe: Cleanup rxe_pool_entryBob Pearson
Currently three different names are used to describe rxe pool elements. They are referred to as entries, elems or pelems. This patch chooses one 'elem' and changes the other ones. Link: https://lore.kernel.org/r/20211103050241.61293-3-rpearsonhpe@gmail.com Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
2021-11-19RDMA/rxe: Replace irqsave locks with bh locksBob Pearson
Most of the locks in the rxe driver are _irqsave/restore locks but in fact there are no interrupt threads that run rxe code or share data with rxe. There are softirq threads and data sharing so the appropriate lock type is _bh. This patch replaces all irqsave type locks with bh type locks. Link: https://lore.kernel.org/r/20211103050241.61293-2-rpearsonhpe@gmail.com Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
2021-09-24RDMA/rxe: Create duplicate mapping tables for FMRsBob Pearson
For fast memory regions create duplicate mapping tables so ib_map_mr_sg() can build a new mapping table which is then swapped into place synchronously with the execution of an IB_WR_REG_MR work request. Currently the rxe driver uses the same table for receiving RDMA operations and for building new tables in preparation for reusing the MR. This exposes users to potentially incorrect results. Link: https://lore.kernel.org/r/20210914164206.19768-5-rpearsonhpe@gmail.com Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
2021-09-24RDMA/rxe: Separate HW and SW l/rkeysBob Pearson
Separate software and simulated hardware lkeys and rkeys for MRs and MWs. This makes struct ib_mr and struct ib_mw isolated from hardware changes triggered by executing work requests. This change fixes a bug seen in blktest. Link: https://lore.kernel.org/r/20210914164206.19768-4-rpearsonhpe@gmail.com Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
2021-06-16RDMA/rxe: Implement memory access through MWsBob Pearson
Add code to implement memory access through memory windows. Link: https://lore.kernel.org/r/20210608042552.33275-10-rpearsonhpe@gmail.com Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
2021-06-16RDMA/rxe: Implement invalidate MW operationsBob Pearson
Implement invalidate MW and cleaned up invalidate MR operations. Added code to perform remote invalidate for send with invalidate. Added code to perform local invalidation. Deleted some blank lines in rxe_loc.h. Link: https://lore.kernel.org/r/20210608042552.33275-9-rpearsonhpe@gmail.com Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
2021-06-16RDMA/rxe: Add support for bind MW work requestsBob Pearson
Add support for bind MW work requests from user space. Since rdma/core does not support bind mw in ib_send_wr there is no way to support bind mw in kernel space. Added bind_mw local operation in rxe_req.c. Added bind_mw WR operation in rxe_opcode.c. Added bind_mw WC in rxe_comp.c. Added additional fields to rxe_mw in rxe_verbs.h. Added rxe_do_dealloc_mw() subroutine to cleanup an mw when rxe_dealloc_mw is called. Added code to implement bind_mw operation in rxe_mw.c Link: https://lore.kernel.org/r/20210608042552.33275-8-rpearsonhpe@gmail.com Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
2021-06-16RDMA/rxe: Add ib_alloc_mw and ib_dealloc_mw verbsBob Pearson
Add ib_alloc_mw and ib_dealloc_mw verbs APIs. Added new file rxe_mw.c focused on MWs. Changed the 8 bit random key generator. Added a cleanup routine for MWs. Added verbs routines to ib_device_ops. Link: https://lore.kernel.org/r/20210608042552.33275-5-rpearsonhpe@gmail.com Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
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