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* svcrdma: Fix page leak in svc_rdma_recv_read_chunk()Chuck Lever2020-07-131-7/+21
| | | | | | | | | | Commit 07d0ff3b0cd2 ("svcrdma: Clean up Read chunk path") moved the page saver logic so that it gets executed event when an error occurs. In that case, the I/O is never posted, and those pages are then leaked. Errors in this path, however, are quite rare. Fixes: 07d0ff3b0cd2 ("svcrdma: Clean up Read chunk path") Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
* SUNRPC: Augment server-side rpcgss tracepointsChuck Lever2020-07-132-38/+82
| | | | | | | | | | | | | | | | Add similar tracepoints to those that were recently added on the client side to track failures in the integ and priv unwrap paths. And, let's collect the seqno-specific tracepoints together with a common naming convention. Regarding the gss_check_seq_num() changes: everywhere else treats the GSS sequence number as an unsigned 32-bit integer. As far back as 2.6.12, I couldn't find a compelling reason to do things differently here. As a defensive change it's better to eliminate needless implicit sign conversions. Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
* Merge tag 'nfsd-5.8-1' of git://linux-nfs.org/~bfields/linuxLinus Torvalds2020-07-021-0/+1
|\ | | | | | | | | | | | | | | | | | | | | | | | | Pull nfsd fixes from Bruce Fields: "Fixes for a umask bug on exported filesystems lacking ACL support, a leak and a module unloading bug in the /proc/fs/nfsd/clients/ code, and a compile warning" * tag 'nfsd-5.8-1' of git://linux-nfs.org/~bfields/linux: SUNRPC: Add missing definition of ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE nfsd: fix nfsdfs inode reference count leak nfsd4: fix nfsdfs reference count loop nfsd: apply umask on fs without ACL support
| * SUNRPC: Add missing definition of ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGEChristophe Leroy2020-06-291-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Even if that's only a warning, not including asm/cacheflush.h leads to svc_flush_bvec() being empty allthough powerpc defines ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE. CC net/sunrpc/svcsock.o net/sunrpc/svcsock.c:227:5: warning: "ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE" is not defined [-Wundef] #if ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE ^ Include linux/highmem.h so that asm/cacheflush.h will be included. Reported-by: Christophe Leroy <christophe.leroy@csgroup.eu> Reported-by: kernel test robot <lkp@intel.com> Fixes: ca07eda33e01 ("SUNRPC: Refactor svc_recvfrom()") Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Acked-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* | SUNRPC: Properly set the @subbuf parameter of xdr_buf_subsegment()Chuck Lever2020-06-261-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | @subbuf is an output parameter of xdr_buf_subsegment(). A survey of call sites shows that @subbuf is always uninitialized before xdr_buf_segment() is invoked by callers. There are some execution paths through xdr_buf_subsegment() that do not set all of the fields in @subbuf, leaving some pointer fields containing garbage addresses. Subsequent processing of that buffer then results in a page fault. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Cc: <stable@vger.kernel.org> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
* | sunrpc: fixed rollback in rpc_gssd_dummy_populate()Vasily Averin2020-06-261-0/+1
| | | | | | | | | | | | | | | | | | | | __rpc_depopulate(gssd_dentry) was lost on error path cc: stable@vger.kernel.org Fixes: commit 4b9a445e3eeb ("sunrpc: create a new dummy pipe for gssd to hold open") Signed-off-by: Vasily Averin <vvs@virtuozzo.com> Reviewed-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
* | xprtrdma: Fix handling of RDMA_ERROR repliesChuck Lever2020-06-221-6/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The RPC client currently doesn't handle ERR_CHUNK replies correctly. rpcrdma_complete_rqst() incorrectly passes a negative number to xprt_complete_rqst() as the number of bytes copied. Instead, set task->tk_status to the error value, and return zero bytes copied. In these cases, return -EIO rather than -EREMOTEIO. The RPC client's finite state machine doesn't know what to do with -EREMOTEIO. Additional clean ups: - Don't double-count RDMA_ERROR replies - Remove a stale comment Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Cc: <stable@kernel.vger.org> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
* | xprtrdma: Clean up disconnectChuck Lever2020-06-222-10/+14
| | | | | | | | | | | | | | | | | | | | | | 1. Ensure that only rpcrdma_cm_event_handler() modifies ep->re_connect_status to avoid racy changes to that field. 2. Ensure that xprt_force_disconnect() is invoked only once as a transport is closed or destroyed. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
* | xprtrdma: Clean up synopsis of rpcrdma_flush_disconnect()Chuck Lever2020-06-223-11/+11
| | | | | | | | | | | | | | Refactor: Pass struct rpcrdma_xprt instead of an IB layer object. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
* | xprtrdma: Use re_connect_status safely in rpcrdma_xprt_connect()Chuck Lever2020-06-222-4/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | Clean up: Sometimes creating a fresh rpcrdma_ep can fail. That's why xprt_rdma_connect() always checks if the r_xprt->rx_ep pointer is valid before dereferencing it. Instead, xprt_rdma_connect() can simply check rpcrdma_xprt_connect()'s return value. Also, there's no need to set re_connect_status to zero just after the rpcrdma_ep is created, since it is allocated with kzalloc. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
* | xprtrdma: Prevent dereferencing r_xprt->rx_ep after it is freedChuck Lever2020-06-221-10/+23
|/ | | | | | | | | | | | | | r_xprt->rx_ep is known to be good while the transport's send lock is held. Otherwise additional references on rx_ep must be held when it is used outside of that lock's critical sections. For now, bump the rx_ep reference count once whenever there is at least one outstanding Receive WR. This avoids the memory bandwidth overhead of taking and releasing the reference count for every ib_post_recv() and Receive completion. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
* Merge tag 'nfs-for-5.8-1' of git://git.linux-nfs.org/projects/anna/linux-nfsLinus Torvalds2020-06-1110-79/+80
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull NFS client updates from Anna Schumaker: "New features and improvements: - Sunrpc receive buffer sizes only change when establishing a GSS credentials - Add more sunrpc tracepoints - Improve on tracepoints to capture internal NFS I/O errors Other bugfixes and cleanups: - Move a dprintk() to after a call to nfs_alloc_fattr() - Fix off-by-one issues in rpc_ntop6 - Fix a few coccicheck warnings - Use the correct SPDX license identifiers - Fix rpc_call_done assignment for BIND_CONN_TO_SESSION - Replace zero-length array with flexible array - Remove duplicate headers - Set invalid blocks after NFSv4 writes to update space_used attribute - Fix direct WRITE throughput regression" * tag 'nfs-for-5.8-1' of git://git.linux-nfs.org/projects/anna/linux-nfs: (27 commits) NFS: Fix direct WRITE throughput regression SUNRPC: rpc_xprt lifetime events should record xprt->state xprtrdma: Make xprt_rdma_slot_table_entries static nfs: set invalid blocks after NFSv4 writes NFS: remove redundant initialization of variable result sunrpc: add missing newline when printing parameter 'auth_hashtable_size' by sysfs NFS: Add a tracepoint in nfs_set_pgio_error() NFS: Trace short NFS READs NFS: nfs_xdr_status should record the procedure name SUNRPC: Set SOFTCONN when destroying GSS contexts SUNRPC: rpc_call_null_helper() should set RPC_TASK_SOFT SUNRPC: rpc_call_null_helper() already sets RPC_TASK_NULLCREDS SUNRPC: trace RPC client lifetime events SUNRPC: Trace transport lifetime events SUNRPC: Split the xdr_buf event class SUNRPC: Add tracepoint to rpc_call_rpcerror() SUNRPC: Update the RPC_SHOW_SOCKET() macro SUNRPC: Update the rpc_show_task_flags() macro SUNRPC: Trace GSS context lifetimes SUNRPC: receive buffer size estimation values almost never change ...
| * xprtrdma: Make xprt_rdma_slot_table_entries staticZou Wei2020-06-111-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | Fix the following sparse warning: net/sunrpc/xprtrdma/transport.c:71:14: warning: symbol 'xprt_rdma_slot_table_entries' was not declared. Should it be static? Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Zou Wei <zou_wei@huawei.com> Reviewed-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * sunrpc: add missing newline when printing parameter 'auth_hashtable_size' by ↵Xiongfeng Wang2020-06-111-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | sysfs When I cat parameter '/sys/module/sunrpc/parameters/auth_hashtable_size', it displays as follows. It is better to add a newline for easy reading. [root@hulk-202 ~]# cat /sys/module/sunrpc/parameters/auth_hashtable_size 16[root@hulk-202 ~]# Signed-off-by: Xiongfeng Wang <wangxiongfeng2@huawei.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * SUNRPC: Set SOFTCONN when destroying GSS contextsChuck Lever2020-06-111-5/+4
| | | | | | | | | | | | | | | | | | | | | | | | Move the RPC_TASK_SOFTCONN flag into rpc_call_null_helper(). The only minor behavior change is that it is now also set when destroying GSS contexts. This gives a better guarantee that gss_send_destroy_context() will not hang for long if a connection cannot be established. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * SUNRPC: rpc_call_null_helper() should set RPC_TASK_SOFTChuck Lever2020-06-112-5/+4
| | | | | | | | | | | | | | | | | | | | Clean up. All of rpc_call_null_helper() call sites assert RPC_TASK_SOFT, so move that setting into rpc_call_null_helper() itself. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * SUNRPC: rpc_call_null_helper() already sets RPC_TASK_NULLCREDSChuck Lever2020-06-111-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | Clean up. Commit a52458b48af1 ("NFS/NFSD/SUNRPC: replace generic creds with 'struct cred'.") made rpc_call_null_helper() set RPC_TASK_NULLCREDS unconditionally. Therefore there's no need for rpc_call_null_helper()'s call sites to set RPC_TASK_NULLCREDS. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * SUNRPC: trace RPC client lifetime eventsChuck Lever2020-06-111-24/+15
| | | | | | | | | | | | | | | | | | The "create" tracepoint records parts of the rpc_create arguments, and the shutdown tracepoint records when the rpc_clnt is about to signal pending tasks and destroy auths. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * SUNRPC: Trace transport lifetime eventsChuck Lever2020-06-113-19/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Refactor: Hoist create/destroy/disconnect tracepoints out of xprtrdma and into the generic RPC client. Some benefits include: - Enable tracing of xprt lifetime events for the socket transport types - Expose the different types of disconnect to help run down issues with lingering connections Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * SUNRPC: Split the xdr_buf event classChuck Lever2020-06-113-5/+5
| | | | | | | | | | | | | | | | | | To help tie the recorded xdr_buf to a particular RPC transaction, the client side version of this class should display task ID information and the server side one should show the request's XID. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * SUNRPC: Add tracepoint to rpc_call_rpcerror()Chuck Lever2020-06-111-0/+1
| | | | | | | | | | | | | | Add a tracepoint in another common exit point for failing RPCs. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * SUNRPC: Trace GSS context lifetimesChuck Lever2020-06-112-4/+7
| | | | | | | | | | Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * SUNRPC: receive buffer size estimation values almost never changeChuck Lever2020-06-112-16/+32
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Avoid unnecessary cache sloshing by placing the buffer size estimation update logic behind an atomic bit flag. The size of GSS information included in each wrapped Reply does not change during the lifetime of a GSS context. Therefore, the au_rslack and au_ralign fields need to be updated only once after establishing a fresh GSS credential. Thus a slack size update must occur after a cred is created, duplicated, renewed, or expires. I'm not sure I have this exactly right. A trace point is introduced to track updates to these variables to enable troubleshooting the problem if I missed a spot. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| * net: sunrpc: Fix off-by-one issues in 'rpc_ntop6'Fedor Tokarev2020-05-271-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | Fix off-by-one issues in 'rpc_ntop6': - 'snprintf' returns the number of characters which would have been written if enough space had been available, excluding the terminating null byte. Thus, a return value of 'sizeof(scopebuf)' means that the last character was dropped. - 'strcat' adds a terminating null byte to the string, thus if len == buflen, the null byte is written past the end of the buffer. Signed-off-by: Fedor Tokarev <ftokarev@gmail.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
* | Merge tag 'nfsd-5.8' of git://linux-nfs.org/~bfields/linuxLinus Torvalds2020-06-1117-461/+407
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull nfsd updates from Bruce Fields: "Highlights: - Keep nfsd clients from unnecessarily breaking their own delegations. Note this requires a small kthreadd addition. The result is Tejun Heo's suggestion (see link), and he was OK with this going through my tree. - Patch nfsd/clients/ to display filenames, and to fix byte-order when displaying stateid's. - fix a module loading/unloading bug, from Neil Brown. - A big series from Chuck Lever with RPC/RDMA and tracing improvements, and lay some groundwork for RPC-over-TLS" Link: https://lore.kernel.org/r/1588348912-24781-1-git-send-email-bfields@redhat.com * tag 'nfsd-5.8' of git://linux-nfs.org/~bfields/linux: (49 commits) sunrpc: use kmemdup_nul() in gssp_stringify() nfsd: safer handling of corrupted c_type nfsd4: make drc_slab global, not per-net SUNRPC: Remove unreachable error condition in rpcb_getport_async() nfsd: Fix svc_xprt refcnt leak when setup callback client failed sunrpc: clean up properly in gss_mech_unregister() sunrpc: svcauth_gss_register_pseudoflavor must reject duplicate registrations. sunrpc: check that domain table is empty at module unload. NFSD: Fix improperly-formatted Doxygen comments NFSD: Squash an annoying compiler warning SUNRPC: Clean up request deferral tracepoints NFSD: Add tracepoints for monitoring NFSD callbacks NFSD: Add tracepoints to the NFSD state management code NFSD: Add tracepoints to NFSD's duplicate reply cache SUNRPC: svc_show_status() macro should have enum definitions SUNRPC: Restructure svc_udp_recvfrom() SUNRPC: Refactor svc_recvfrom() SUNRPC: Clean up svc_release_skb() functions SUNRPC: Refactor recvfrom path dealing with incomplete TCP receives SUNRPC: Replace dprintk() call sites in TCP receive path ...
| * | sunrpc: use kmemdup_nul() in gssp_stringify()Chen Zhou2020-06-081-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It is more efficient to use kmemdup_nul() if the size is known exactly . According to doc: "Note: Use kmemdup_nul() instead if the size is known exactly." Signed-off-by: Chen Zhou <chenzhou10@huawei.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * | SUNRPC: Remove unreachable error condition in rpcb_getport_async()Xiyu Yang2020-05-281-6/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | rpcb_getport_async() invokes rpcb_call_async(), which return the value of rpc_run_task() to "child". Since rpc_run_task() is impossible to return an ERR pointer, there is no need to add the IS_ERR() condition on "child" here. So we need to remove it. Signed-off-by: Xiyu Yang <xiyuyang19@fudan.edu.cn> Signed-off-by: Xin Tan <tanxin.ctf@gmail.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * | sunrpc: clean up properly in gss_mech_unregister()NeilBrown2020-05-282-9/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | gss_mech_register() calls svcauth_gss_register_pseudoflavor() for each flavour, but gss_mech_unregister() does not call auth_domain_put(). This is unbalanced and makes it impossible to reload the module. Change svcauth_gss_register_pseudoflavor() to return the registered auth_domain, and save it for later release. Cc: stable@vger.kernel.org (v2.6.12+) Link: https://bugzilla.kernel.org/show_bug.cgi?id=206651 Signed-off-by: NeilBrown <neilb@suse.de> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * | sunrpc: svcauth_gss_register_pseudoflavor must reject duplicate registrations.NeilBrown2020-05-281-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There is no valid case for supporting duplicate pseudoflavor registrations. Currently the silent acceptance of such registrations is hiding a bug. The rpcsec_gss_krb5 module registers 2 flavours but does not unregister them, so if you load, unload, reload the module, it will happily continue to use the old registration which now has pointers to the memory were the module was originally loaded. This could lead to unexpected results. So disallow duplicate registrations. Link: https://bugzilla.kernel.org/show_bug.cgi?id=206651 Cc: stable@vger.kernel.org (v2.6.12+) Signed-off-by: NeilBrown <neilb@suse.de> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * | sunrpc: check that domain table is empty at module unload.NeilBrown2020-05-283-0/+28
| | | | | | | | | | | | | | | | | | | | | | | | | | | The domain table should be empty at module unload. If it isn't there is a bug somewhere. So check and report. Link: https://bugzilla.kernel.org/show_bug.cgi?id=206651 Signed-off-by: NeilBrown <neilb@suse.de> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * | Merge branch 'nfsd-5.8' of git://linux-nfs.org/~cel/cel-2.6 into ↵J. Bruce Fields2020-05-2116-469/+448
| |\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | for-5.8-incoming Highlights of this series: * Remove serialization of sending RPC/RDMA Replies * Convert the TCP socket send path to use xdr_buf::bvecs (pre-requisite for RPC-on-TLS) * Fix svcrdma backchannel sendto return code * Convert a number of dprintk call sites to use tracepoints * Fix the "suggest braces around empty body in an 'else' statement" warning
| | * | SUNRPC: Clean up request deferral tracepointsChuck Lever2020-05-201-6/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Rename these so they are easy to enable and search for as a set - Move the tracepoints to get a more accurate sense of control flow - Tracepoints should not fire on xprt shutdown - Display memory address in case data structure had been corrupted - Abandon dprintk in these paths I haven't ever gotten one of these tracepoints to trigger. I wonder if we should simply remove them. Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
| | * | SUNRPC: Restructure svc_udp_recvfrom()Chuck Lever2020-05-201-25/+35
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Clean up. At this point, we are not ready yet to support bio_vecs in the UDP transport implementation. However, we can clean up svc_udp_recvfrom() to match the tracing and straight-lining recently changes made in svc_tcp_recvfrom(). Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
| | * | SUNRPC: Refactor svc_recvfrom()Chuck Lever2020-05-201-41/+68
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This function is not currently "generic" so remove the documenting comment and rename it appropriately. Its internals are converted to use bio_vecs for reading from the transport socket. In existing typical sunrpc uses of bio_vecs, the bio_vec array is allocated dynamically. Here, instead, an array of bio_vecs is added to svc_rqst. The lifetime of this array can be greater than one call to xpo_recvfrom(): - Multiple calls to xpo_recvfrom() might be needed to read an RPC message completely. - At some later point, rq_arg.bvecs will point to this array and it will carry the received message into svc_process(). I also expect that a future optimization will remove either the rq_vec or rq_pages array in favor of rq_bvec, thus conserving the size of struct svc_rqst. Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
| | * | SUNRPC: Clean up svc_release_skb() functionsChuck Lever2020-05-201-8/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Rename these functions using the convention used for other xpo method entry points. Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
| | * | SUNRPC: Refactor recvfrom path dealing with incomplete TCP receivesChuck Lever2020-05-201-20/+19
| | | | | | | | | | | | | | | | | | | | | | | | Clean up: move exception processing out of the main path. Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
| | * | SUNRPC: Replace dprintk() call sites in TCP receive pathChuck Lever2020-05-201-14/+2
| | | | | | | | | | | | | | | | Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
| | * | SUNRPC: Restructure svc_tcp_recv_record()Chuck Lever2020-05-181-26/+25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Refactor: svc_recvfrom() is going to be converted to read into bio_vecs in a moment. Unhook the only other caller, svc_tcp_recv_record(), which just wants to read the 4-byte stream record marker into a kvec. While we're in the area, streamline this helper by straight-lining the hot path, replace dprintk call sites with tracepoints, and reduce the number of atomic bit operations in this path. Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
| | * | SUNRPC: Rename svc_sock::sk_reclenChuck Lever2020-05-181-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Clean up. I find the name of the svc_sock::sk_reclen field confusing, so I've changed it to better reflect its function. This field is not read directly to get the record length. Rather, it is a buffer containing a record marker that needs to be decoded. Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
| | * | SUNRPC: Trace server-side rpcbind registration eventsChuck Lever2020-05-181-15/+4
| | | | | | | | | | | | | | | | Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
| | * | SUNRPC: Replace dprintk call sites in TCP state change calloutsChuck Lever2020-05-181-29/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Report TCP socket state changes and accept failures via tracepoints, replacing dprintk() call sites. No tracepoint is added in svc_tcp_listen_data_ready. There's no information available there that isn't also reported by the svcsock_new_socket and the accept failure tracepoints. Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
| | * | SUNRPC: Add more svcsock tracepointsChuck Lever2020-05-181-20/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In addition to tracing recently-updated socket sendto events, this commit adds a trace event class that can be used for additional svcsock-related tracepoints in subsequent patches. Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
| | * | SUNRPC: Remove "#include <trace/events/skb.h>"Chuck Lever2020-05-181-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Clean up: Commit 850cbaddb52d ("udp: use it's own memory accounting schema") removed the last skb-related tracepoint from svcsock.c, so it is no longer necessary to include trace/events/skb.h. Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
| | * | SUNRPC: Trace a few more generic svc_xprt eventsChuck Lever2020-05-183-46/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In lieu of dprintks or tracepoints in each individual transport implementation, introduce tracepoints in the generic part of the RPC layer. These typically fire for connection lifetime events, so shouldn't contribute a lot of noise. Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
| | * | SUNRPC: Tracepoint to record errors in svc_xpo_create()Chuck Lever2020-05-181-1/+6
| | | | | | | | | | | | | | | | | | | | | | | | Capture transport creation failures. Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
| | * | svcrdma: Add tracepoints to report ->xpo_accept failuresChuck Lever2020-05-181-16/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Failure to accept a connection is typically due to a problem specific to a transport type. Also, ->xpo_accept returns NULL on error rather than reporting a specific problem. So, add failure-specific tracepoints in svc_rdma_accept(). Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
| | * | svcrdma: Displayed remote IP address should match stored addressChuck Lever2020-05-181-1/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Clean up: After commit 1e091c3bbf51 ("svcrdma: Ignore source port when computing DRC hash"), the IP address stored in xpt_remote always has a port number of zero. Thus, there's no need to display the port number when displaying the IP address of a remote NFS/RDMA client. Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
| | * | svcrdma: Rename tracepoints that record header decoding errorsChuck Lever2020-05-181-5/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Clean up: Use a consistent naming convention so that these trace points can be enabled quickly via a glob. Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
| | * | svcrdma: Remove backchannel dprintk call sitesChuck Lever2020-05-181-43/+5
| | | | | | | | | | | | | | | | | | | | | | | | Clean up. Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
| | * | svcrdma: Fix backchannel return codeChuck Lever2020-05-182-34/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Way back when I was writing the RPC/RDMA server-side backchannel code, I misread the TCP backchannel reply handler logic. When svc_tcp_recvfrom() successfully receives a backchannel reply, it does not return -EAGAIN. It sets XPT_DATA and returns zero. Update svc_rdma_recvfrom() to return zero. Here, XPT_DATA doesn't need to be set again: it is set whenever a new message is received, behind a spin lock in a single threaded context. Also, if handling the cb reply is not successful, the message is simply dropped. There's no special message framing to deal with as there is in the TCP case. Now that the handle_bc_reply() return value is ignored, I've removed the dprintk call sites in the error exit of handle_bc_reply() in favor of trace points in other areas that already report the error cases. Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-26 22:49:28 +0000