kernel.git/net/sunrpc/xprtrdma, branch linux-5.9.y

svcrdma: fix bounce buffers for unaligned offsets and multiple pages

2020-10-29T09:11:56Z

[ Upstream commit c327a310ec4d6ecbea13185ed56c11def441d9ab ] This was discovered using O_DIRECT at the client side, with small unaligned file offsets or IOs that span multiple file pages. Fixes: e248aa7be86 ("svcrdma: Remove max_sge check at connect time") Signed-off-by: Dan Aloni Signed-off-by: J. Bruce Fields Signed-off-by: Sasha Levin

Merge tag 'nfs-for-5.9-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

2020-09-09T18:14:20Z

Pull NFS client bugfixes from Trond Myklebust: - Fix an NFS/RDMA resource leak - Fix the error handling during delegation recall - NFSv4.0 needs to return the delegation on a zero-stateid SETATTR - Stop printk reading past end of string * tag 'nfs-for-5.9-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: SUNRPC: stop printk reading past end of string NFS: Zero-stateid SETATTR should first return delegation NFSv4.1 handle ERR_DELAY error reclaiming locking state on delegation recall xprtrdma: Release in-flight MRs on disconnect

xprtrdma: Release in-flight MRs on disconnect

2020-08-26T19:29:21Z

Dan Aloni reports that when a server disconnects abruptly, a few memory regions are left DMA mapped. Over time this leak could pin enough I/O resources to slow or even deadlock an NFS/RDMA client. I found that if a transport disconnects before pending Send and FastReg WRs can be posted, the to-be-registered MRs are stranded on the req's rl_registered list and never released -- since they weren't posted, there's no Send completion to DMA unmap them. Reported-by: Dan Aloni Signed-off-by: Chuck Lever Signed-off-by: Anna Schumaker

treewide: Use fallthrough pseudo-keyword

2020-08-23T22:36:59Z

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

Merge tag 'nfsd-5.9' of git://git.linux-nfs.org/projects/cel/cel-2.6

2020-08-09T20:58:04Z

Pull NFS server updates from Chuck Lever: "Highlights: - Support for user extended attributes on NFS (RFC 8276) - Further reduce unnecessary NFSv4 delegation recalls Notable fixes: - Fix recent krb5p regression - Address a few resource leaks and a rare NULL dereference Other: - De-duplicate RPC/RDMA error handling and other utility functions - Replace storage and display of kernel memory addresses by tracepoints" * tag 'nfsd-5.9' of git://git.linux-nfs.org/projects/cel/cel-2.6: (38 commits) svcrdma: CM event handler clean up svcrdma: Remove transport reference counting svcrdma: Fix another Receive buffer leak SUNRPC: Refresh the show_rqstp_flags() macro nfsd: netns.h: delete a duplicated word SUNRPC: Fix ("SUNRPC: Add "@len" parameter to gss_unwrap()") nfsd: avoid a NULL dereference in __cld_pipe_upcall() nfsd4: a client's own opens needn't prevent delegations nfsd: Use seq_putc() in two functions svcrdma: Display chunk completion ID when posting a rw_ctxt svcrdma: Record send_ctxt completion ID in trace_svcrdma_post_send() svcrdma: Introduce Send completion IDs svcrdma: Record Receive completion ID in svc_rdma_decode_rqst svcrdma: Introduce Receive completion IDs svcrdma: Introduce infrastructure to support completion IDs svcrdma: Add common XDR encoders for RDMA and Read segments svcrdma: Add common XDR decoders for RDMA and Read segments SUNRPC: Add helpers for decoding list discriminators symbolically svcrdma: Remove declarations for functions long removed svcrdma: Clean up trace_svcrdma_send_failed() tracepoint ...

svcrdma: CM event handler clean up

2020-07-28T14:18:15Z

Now that there's a core tracepoint that reports these events, there's no need to maintain dprintk() call sites in each arm of the switch statements. We also refresh the documenting comments. Signed-off-by: Chuck Lever

svcrdma: Remove transport reference counting

2020-07-28T14:18:14Z

Jason tells me that a ULP cannot rely on getting an ESTABLISHED and DISCONNECTED event pair for each connection, so transport reference counting in the CM event handler will never be reliable. Now that we have ib_drain_qp(), svcrdma should no longer need to hold transport references while Sends and Receives are posted. So remove the get/put call sites in the CM event handlers. This eliminates a significant source of locked memory bus traffic. Signed-off-by: Chuck Lever

svcrdma: Fix another Receive buffer leak

2020-07-28T14:18:13Z

During a connection tear down, the Receive queue is flushed before the device resources are freed. Typically, all the Receives flush with IB_WR_FLUSH_ERR. However, any pending successful Receives flush with IB_WR_SUCCESS, and the server automatically posts a fresh Receive to replace the completing one. This happens even after the connection has closed and the RQ is drained. Receives that are posted after the RQ is drained appear never to complete, causing a Receive resource leak. The leaked Receive buffer is left DMA-mapped. To prevent these late-posted recv_ctxt's from leaking, block new Receive posting after XPT_CLOSE is set. Signed-off-by: Chuck Lever

xprtrdma: fix incorrect header size calculations

2020-07-15T17:01:01Z

Currently the header size calculations are using an assignment operator instead of a += operator when accumulating the header size leading to incorrect sizes. Fix this by using the correct operator. Addresses-Coverity: ("Unused value") Fixes: 302d3deb2068 ("xprtrdma: Prevent inline overflow") Signed-off-by: Colin Ian King Reviewed-by: Chuck Lever Signed-off-by: Anna Schumaker

svcrdma: Display chunk completion ID when posting a rw_ctxt

2020-07-13T21:28:24Z

Re-use the post_rw tracepoint (safely) to trace cc_info lifetime events, including completion IDs. Signed-off-by: Chuck Lever