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2020-07-15xprtrdma: fix incorrect header size calculationsColin Ian King1-2/+2
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 <colin.king@canonical.com> Reviewed-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-07-13xprtrdma: Fix handling of connect errorsChuck Lever1-3/+5
Ensure that the connect worker is awoken if an attempt to establish a connection is unsuccessful. Otherwise the worker waits forever and the transport workload hangs. Connect errors should not attempt to destroy the ep, since the connect worker continues to use it after the handler runs, so these errors are now handled independently of DISCONNECTED events. Reported-by: Dan Aloni <dan@kernelim.com> Fixes: e28ce90083f0 ("xprtrdma: kmalloc rpcrdma_ep separate from rpcrdma_xprt") Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-07-13xprtrdma: Fix return code from rpcrdma_xprt_connect()Chuck Lever1-6/+10
I noticed that when rpcrdma_xprt_connect() returns -ENOMEM, instead of retrying the connect, the RPC client kills the RPC task that requested the connection. We want a retry here. Fixes: cb586decbb88 ("xprtrdma: Make sendctx queue lifetime the same as connection lifetime") Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-07-13xprtrdma: Fix recursion into rpcrdma_xprt_disconnect()Chuck Lever2-8/+7
Both Dan and I have observed two processes invoking rpcrdma_xprt_disconnect() concurrently. In my case: 1. The connect worker invokes rpcrdma_xprt_disconnect(), which drains the QP and waits for the final completion 2. This causes the newly posted Receive to flush and invoke xprt_force_disconnect() 3. xprt_force_disconnect() sets CLOSE_WAIT and wakes up the RPC task that is holding the transport lock 4. The RPC task invokes xprt_connect(), which calls ->ops->close 5. xprt_rdma_close() invokes rpcrdma_xprt_disconnect(), which tries to destroy the QP. Deadlock. To prevent xprt_force_disconnect() from waking anything, handle the clean up after a failed connection attempt in the xprt's sndtask. The retry loop is removed from rpcrdma_xprt_connect() to ensure that the newly allocated ep and id are properly released before a REJECTED connection attempt can be retried. Reported-by: Dan Aloni <dan@kernelim.com> Fixes: e28ce90083f0 ("xprtrdma: kmalloc rpcrdma_ep separate from rpcrdma_xprt") Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-07-13xprtrdma: Fix double-free in rpcrdma_ep_create()Chuck Lever1-5/+2
In the error paths, there's no need to call kfree(ep) after calling rpcrdma_ep_put(ep). Fixes: e28ce90083f0 ("xprtrdma: kmalloc rpcrdma_ep separate from rpcrdma_xprt") Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-07-02Merge tag 'nfsd-5.8-1' of git://linux-nfs.org/~bfields/linuxLinus Torvalds1-0/+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
2020-06-29SUNRPC: Add missing definition of ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGEChristophe Leroy1-0/+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>
2020-06-26SUNRPC: Properly set the @subbuf parameter of xdr_buf_subsegment()Chuck Lever1-0/+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>
2020-06-26sunrpc: fixed rollback in rpc_gssd_dummy_populate()Vasily Averin1-0/+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>
2020-06-22xprtrdma: Fix handling of RDMA_ERROR repliesChuck Lever1-6/+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>
2020-06-22xprtrdma: Clean up disconnectChuck Lever2-10/+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>
2020-06-22xprtrdma: Clean up synopsis of rpcrdma_flush_disconnect()Chuck Lever3-11/+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>
2020-06-22xprtrdma: Use re_connect_status safely in rpcrdma_xprt_connect()Chuck Lever2-4/+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>
2020-06-22xprtrdma: Prevent dereferencing r_xprt->rx_ep after it is freedChuck Lever1-10/+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>
2020-06-11Merge tag 'nfs-for-5.8-1' of git://git.linux-nfs.org/projects/anna/linux-nfsLinus Torvalds10-79/+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 ...
2020-06-11xprtrdma: Make xprt_rdma_slot_table_entries staticZou Wei1-1/+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>
2020-06-11sunrpc: add missing newline when printing parameter 'auth_hashtable_size' by ↵Xiongfeng Wang1-1/+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>
2020-06-11SUNRPC: Set SOFTCONN when destroying GSS contextsChuck Lever1-5/+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>
2020-06-11SUNRPC: rpc_call_null_helper() should set RPC_TASK_SOFTChuck Lever2-5/+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>
2020-06-11SUNRPC: rpc_call_null_helper() already sets RPC_TASK_NULLCREDSChuck Lever1-2/+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>
2020-06-11SUNRPC: trace RPC client lifetime eventsChuck Lever1-24/+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>
2020-06-11SUNRPC: Trace transport lifetime eventsChuck Lever3-19/+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>
2020-06-11SUNRPC: Split the xdr_buf event classChuck Lever3-5/+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>
2020-06-11SUNRPC: Add tracepoint to rpc_call_rpcerror()Chuck Lever1-0/+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>
2020-06-11SUNRPC: Trace GSS context lifetimesChuck Lever2-4/+7
Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-06-11SUNRPC: receive buffer size estimation values almost never changeChuck Lever2-16/+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>
2020-06-11Merge tag 'nfsd-5.8' of git://linux-nfs.org/~bfields/linuxLinus Torvalds17-461/+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 ...
2020-06-08sunrpc: use kmemdup_nul() in gssp_stringify()Chen Zhou1-1/+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>
2020-05-28SUNRPC: Remove unreachable error condition in rpcb_getport_async()Xiyu Yang1-6/+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>
2020-05-28sunrpc: clean up properly in gss_mech_unregister()NeilBrown2-9/+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>
2020-05-28sunrpc: svcauth_gss_register_pseudoflavor must reject duplicate registrations.NeilBrown1-2/+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>
2020-05-28sunrpc: check that domain table is empty at module unload.NeilBrown3-0/+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>
2020-05-28ipv6: add ip6_sock_set_recvpktinfoChristoph Hellwig1-8/+2
Add a helper to directly set the IPV6_RECVPKTINFO 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>
2020-05-28ipv6: add ip6_sock_set_addr_preferencesChristoph Hellwig1-3/+4
Add a helper to directly set the IPV6_ADD_PREFERENCES 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>
2020-05-28ipv6: add ip6_sock_set_v6onlyChristoph Hellwig1-5/+1
Add a helper to directly set the IPV6_V6ONLY 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>
2020-05-28ipv4: add ip_sock_set_pktinfoChristoph Hellwig1-3/+2
Add a helper to directly set the IP_PKTINFO 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>
2020-05-28tcp: add tcp_sock_set_keepcntChristoph Hellwig1-2/+1
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>
2020-05-28tcp: add tcp_sock_set_keepintvlChristoph Hellwig1-2/+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>
2020-05-28tcp: add tcp_sock_set_keepidleChristoph Hellwig1-2/+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>
2020-05-28tcp: add tcp_sock_set_user_timeoutChristoph Hellwig1-2/+1
Add a helper to directly set the TCP_USER_TIMEOUT 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>
2020-05-28net: add sock_set_reuseportChristoph Hellwig1-16/+1
Add a helper to directly set the SO_REUSEPORT 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>
2020-05-28net: add sock_set_keepaliveChristoph Hellwig1-3/+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>
2020-05-28net: add sock_no_lingerChristoph Hellwig1-10/+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>
2020-05-27net: sunrpc: Fix off-by-one issues in 'rpc_ntop6'Fedor Tokarev1-2/+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>
2020-05-24Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netDavid S. Miller1-2/+7
The MSCC bug fix in 'net' had to be slightly adjusted because the register accesses are done slightly differently in net-next. Signed-off-by: David S. Miller <davem@davemloft.net>
2020-05-21Merge branch 'nfsd-5.8' of git://linux-nfs.org/~cel/cel-2.6 into ↵J. Bruce Fields16-469/+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
2020-05-20SUNRPC: Clean up request deferral tracepointsChuck Lever1-6/+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>
2020-05-20SUNRPC: Restructure svc_udp_recvfrom()Chuck Lever1-25/+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>
2020-05-20SUNRPC: Refactor svc_recvfrom()Chuck Lever1-41/+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>
2020-05-20SUNRPC: Clean up svc_release_skb() functionsChuck Lever1-8/+15
Rename these functions using the convention used for other xpo method entry points. Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
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