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2021-07-09Merge tag 'nfs-for-5.14-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfsLinus Torvalds5-0/+21
Pull NFS client updates from Trond Myklebust: "Highlights include: Features: - Multiple patches to add support for fcntl() leases over NFSv4. - A sysfs interface to display more information about the various transport connections used by the RPC client - A sysfs interface to allow a suitably privileged user to offline a transport that may no longer point to a valid server - A sysfs interface to allow a suitably privileged user to change the server IP address used by the RPC client Stable fixes: - Two sunrpc fixes for deadlocks involving privileged rpc_wait_queues Bugfixes: - SUNRPC: Avoid a KASAN slab-out-of-bounds bug in xdr_set_page_base() - SUNRPC: prevent port reuse on transports which don't request it. - NFSv3: Fix memory leak in posix_acl_create() - NFS: Various fixes to attribute revalidation timeouts - NFSv4: Fix handling of non-atomic change attribute updates - NFSv4: If a server is down, don't cause mounts to other servers to hang as well - pNFS: Fix an Oops in pnfs_mark_request_commit() when doing O_DIRECT - NFS: Fix mount failures due to incorrect setting of the has_sec_mnt_opts filesystem flag - NFS: Ensure nfs_readpage returns promptly when an internal error occurs - NFS: Fix fscache read from NFS after cache error - pNFS: Various bugfixes around the LAYOUTGET operation" * tag 'nfs-for-5.14-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (46 commits) NFSv4/pNFS: Return an error if _nfs4_pnfs_v3_ds_connect can't load NFSv3 NFSv4/pNFS: Don't call _nfs4_pnfs_v3_ds_connect multiple times NFSv4/pnfs: Clean up layout get on open NFSv4/pnfs: Fix layoutget behaviour after invalidation NFSv4/pnfs: Fix the layout barrier update NFS: Fix fscache read from NFS after cache error NFS: Ensure nfs_readpage returns promptly when internal error occurs sunrpc: remove an offlined xprt using sysfs sunrpc: provide showing transport's state info in the sysfs directory sunrpc: display xprt's queuelen of assigned tasks via sysfs sunrpc: provide multipath info in the sysfs directory NFSv4.1 identify and mark RPC tasks that can move between transports sunrpc: provide transport info in the sysfs directory SUNRPC: take a xprt offline using sysfs sunrpc: add dst_attr attributes to the sysfs xprt directory SUNRPC for TCP display xprt's source port in sysfs xprt_info SUNRPC query transport's source port SUNRPC display xprt's main value in sysfs's xprt_info SUNRPC mark the first transport sunrpc: add add sysfs directory per xprt under each xprt_switch ...
2021-07-08sunrpc: remove an offlined xprt using sysfsOlga Kornievskaia1-0/+1
Once a transport has been put offline, this transport can be also removed from the list of transports. Any tasks that have been stuck on this transport would find the next available active transport and be re-tried. This transport would be removed from the xprt_switch list and freed. Signed-off-by: Olga Kornievskaia <[email protected]> Signed-off-by: Trond Myklebust <[email protected]>
2021-07-08NFSv4.1 identify and mark RPC tasks that can move between transportsOlga Kornievskaia1-0/+2
In preparation for when we can re-try a task on a different transport, identify and mark such RPC tasks as moveable. Only 4.1+ operarations can be re-tried on a different transport. Signed-off-by: Olga Kornievskaia <[email protected]> Signed-off-by: Trond Myklebust <[email protected]>
2021-07-08SUNRPC: take a xprt offline using sysfsOlga Kornievskaia1-0/+1
Using sysfs's xprt_state attribute, mark a particular transport offline. It will not be picked during the round-robin selection. It's not allowed to take the main (1st created transport associated with the rpc_client) offline. Also bring a transport back online via sysfs by writing "online" and that would allow for this transport to be picked during the round- robin selection. Signed-off-by: Olga Kornievskaia <[email protected]> Signed-off-by: Trond Myklebust <[email protected]>
2021-07-08SUNRPC query transport's source portOlga Kornievskaia1-0/+1
Provide ability to query transport's source port. Signed-off-by: Olga Kornievskaia <[email protected]> Signed-off-by: Trond Myklebust <[email protected]>
2021-07-08SUNRPC mark the first transportOlga Kornievskaia1-0/+1
When an RPC client gets created it's first transport is special and should be marked a main transport. Signed-off-by: Olga Kornievskaia <[email protected]> Signed-off-by: Trond Myklebust <[email protected]>
2021-07-08sunrpc: add dst_attr attributes to the sysfs xprt directoryOlga Kornievskaia1-0/+1
Allow to query and set the destination's address of a transport. Setting of the destination address is allowed only for TCP or RDMA based connections. Signed-off-by: Olga Kornievskaia <[email protected]> Signed-off-by: Trond Myklebust <[email protected]>
2021-07-08sunrpc: add add sysfs directory per xprt under each xprt_switchOlga Kornievskaia1-0/+2
Add individual transport directories under each transport switch group. For instance, for each nconnect=X connections there will be a transport directory. Naming conventions also identifies transport type -- xprt-<id>-<type> where type is udp, tcp, rdma, local, bc. Signed-off-by: Olga Kornievskaia <[email protected]> Signed-off-by: Trond Myklebust <[email protected]>
2021-07-08sunrpc: add xprt_switch direcotry to sunrpc's sysfsOlga Kornievskaia1-0/+2
Add xprt_switch directory to the sysfs and create individual xprt_swith subdirectories for multipath transport group. Signed-off-by: Olga Kornievskaia <[email protected]> Signed-off-by: Trond Myklebust <[email protected]>
2021-07-08sunrpc: keep track of the xprt_class in rpc_xprt structureOlga Kornievskaia1-0/+2
We need to keep track of the type for a given transport. Signed-off-by: Olga Kornievskaia <[email protected]> Signed-off-by: Trond Myklebust <[email protected]>
2021-07-08sunrpc: add IDs to multipathOlga Kornievskaia1-0/+4
This is used to uniquely identify sunrpc multipath objects in /sys. Signed-off-by: Dan Aloni <[email protected]> Signed-off-by: Olga Kornievskaia <[email protected]> Signed-off-by: Trond Myklebust <[email protected]>
2021-07-08sunrpc: add xprt idOlga Kornievskaia1-0/+2
This adds a unique identifier for a sunrpc transport in sysfs, which is similarly managed to the unique IDs of clients. Signed-off-by: Dan Aloni <[email protected]> Signed-off-by: Olga Kornievskaia <[email protected]> Signed-off-by: Trond Myklebust <[email protected]>
2021-07-08sunrpc: Create per-rpc_clnt sysfs kobjectsOlga Kornievskaia1-0/+2
These will eventually have files placed under them for sysfs operations. Signed-off-by: Anna Schumaker <[email protected]> Signed-off-by: Olga Kornievskaia <[email protected]> Signed-off-by: Trond Myklebust <[email protected]>
2021-07-01kernel.h: split out kstrtox() and simple_strtox() to a separate headerAndy Shevchenko1-0/+1
kernel.h is being used as a dump for all kinds of stuff for a long time. Here is the attempt to start cleaning it up by splitting out kstrtox() and simple_strtox() helpers. At the same time convert users in header and lib folders to use new header. Though for time being include new header back to kernel.h to avoid twisted indirected includes for existing users. [[email protected]: fix documentation references] Link: https://lkml.kernel.org/r/[email protected] Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Andy Shevchenko <[email protected]> Acked-by: Jonathan Cameron <[email protected]> Cc: Francis Laniel <[email protected]> Cc: Randy Dunlap <[email protected]> Cc: Kars Mulder <[email protected]> Cc: Trond Myklebust <[email protected]> Cc: Anna Schumaker <[email protected]> Cc: "J. Bruce Fields" <[email protected]> Cc: Chuck Lever <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2021-05-26SUNRPC: More fixes for backlog congestionTrond Myklebust1-0/+2
Ensure that we fix the XPRT_CONGESTED starvation issue for RDMA as well as socket based transports. Ensure we always initialise the request after waking up from the backlog list. Fixes: e877a88d1f06 ("SUNRPC in case of backlog, hand free slots directly to waiting task") Signed-off-by: Trond Myklebust <[email protected]>
2021-05-07Merge tag 'nfs-for-5.13-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfsLinus Torvalds1-0/+1
Pull NFS client updates from Trond Myklebust: "Highlights include: Stable fixes: - Add validation of the UDP retrans parameter to prevent shift out-of-bounds - Don't discard pNFS layout segments that are marked for return Bugfixes: - Fix a NULL dereference crash in xprt_complete_bc_request() when the NFSv4.1 server misbehaves. - Fix the handling of NFS READDIR cookie verifiers - Sundry fixes to ensure attribute revalidation works correctly when the server does not return post-op attributes. - nfs4_bitmask_adjust() must not change the server global bitmasks - Fix major timeout handling in the RPC code. - NFSv4.2 fallocate() fixes. - Fix the NFSv4.2 SEEK_HOLE/SEEK_DATA end-of-file handling - Copy offload attribute revalidation fixes - Fix an incorrect filehandle size check in the pNFS flexfiles driver - Fix several RDMA transport setup/teardown races - Fix several RDMA queue wrapping issues - Fix a misplaced memory read barrier in sunrpc's call_decode() Features: - Micro optimisation of the TCP transmission queue using TCP_CORK - statx() performance improvements by further splitting up the tracking of invalid cached file metadata. - Support the NFSv4.2 'change_attr_type' attribute and use it to optimise handling of change attribute updates" * tag 'nfs-for-5.13-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (85 commits) xprtrdma: Fix a NULL dereference in frwr_unmap_sync() sunrpc: Fix misplaced barrier in call_decode NFSv4.2: Remove ifdef CONFIG_NFSD from NFSv4.2 client SSC code. xprtrdma: Move fr_mr field to struct rpcrdma_mr xprtrdma: Move the Work Request union to struct rpcrdma_mr xprtrdma: Move fr_linv_done field to struct rpcrdma_mr xprtrdma: Move cqe to struct rpcrdma_mr xprtrdma: Move fr_cid to struct rpcrdma_mr xprtrdma: Remove the RPC/RDMA QP event handler xprtrdma: Don't display r_xprt memory addresses in tracepoints xprtrdma: Add an rpcrdma_mr_completion_class xprtrdma: Add tracepoints showing FastReg WRs and remote invalidation xprtrdma: Avoid Send Queue wrapping xprtrdma: Do not wake RPC consumer on a failed LocalInv xprtrdma: Do not recycle MR after FastReg/LocalInv flushes xprtrdma: Clarify use of barrier in frwr_wc_localinv_done() xprtrdma: Rename frwr_release_mr() xprtrdma: rpcrdma_mr_pop() already does list_del_init() xprtrdma: Delete rpcrdma_recv_buffer_put() xprtrdma: Fix cwnd update ordering ...
2021-04-05SUNRPC: Set TCP_CORK until the transmit queue is emptyTrond Myklebust1-0/+1
When we have multiple RPC requests queued up, it makes sense to set the TCP_CORK option while the transmit queue is non-empty. Signed-off-by: Trond Myklebust <[email protected]>
2021-03-31svcrdma: Remove svc_rdma_recv_ctxt::rc_pages and ::rc_argChuck Lever1-3/+0
These fields are no longer used. The size of struct svc_rdma_recv_ctxt is now less than 300 bytes on x86_64, down from 2440 bytes. Signed-off-by: Chuck Lever <[email protected]>
2021-03-31svcrdma: Remove sc_read_complete_qChuck Lever1-2/+0
Now that svc_rdma_recvfrom() waits for Read completion, sc_read_complete_q is no longer used. Signed-off-by: Chuck Lever <[email protected]>
2021-03-22SUNRPC: Export svc_xprt_received()Chuck Lever1-0/+1
Prepare svc_xprt_received() to be called from transport code instead of from generic RPC server code. Signed-off-by: Chuck Lever <[email protected]>
2021-03-22svcrdma: Remove unused sc_pages fieldChuck Lever1-2/+1
Clean up. This significantly reduces the size of struct svc_rdma_send_ctxt. Signed-off-by: Chuck Lever <[email protected]>
2021-03-22svcrdma: Normalize Send page handlingChuck Lever1-0/+1
Currently svc_rdma_sendto() migrates xdr_buf pages into a separate page list and NULLs out a bunch of entries in rq_pages while the pages are under I/O. The Send completion handler then frees those pages later. Instead, let's wait for the Send completion, then handle page releasing in the nfsd thread. I'd like to avoid the cost of 250+ put_page() calls in the Send completion handler, which is single- threaded. Signed-off-by: Chuck Lever <[email protected]>
2021-03-22svcrdma: Add a "deferred close" helperChuck Lever1-0/+1
Refactor a bit of commonly used logic so that every site that wants a close deferred to an nfsd thread does all the right things (set_bit(XPT_CLOSE) then enqueue). Also, once XPT_CLOSE is set on a transport, it is never cleared. If XPT_CLOSE is already set, then the close is already being handled and the enqueue can be skipped. Signed-off-by: Chuck Lever <[email protected]>
2021-03-22svcrdma: Maintain a Receive water markChuck Lever1-0/+2
Post more Receives when the number of pending Receives drops below a water mark. The batch mechanism is disabled if the underlying device cannot support a reasonably-sized Receive Queue. Signed-off-by: Chuck Lever <[email protected]>
2021-03-22NFSD: Update the NFSv3 PATHCONF3res encoder to use struct xdr_streamChuck Lever1-2/+16
Signed-off-by: Chuck Lever <[email protected]>
2021-03-22NFSD: Update the NFSv3 READ3res encode to use struct xdr_streamChuck Lever1-0/+20
Signed-off-by: Chuck Lever <[email protected]>
2021-03-22NFSD: Extract the svcxdr_init_encode() helperChuck Lever1-0/+25
NFSD initializes an encode xdr_stream only after the RPC layer has already inserted the RPC Reply header. Thus it behaves differently than xdr_init_encode does, which assumes the passed-in xdr_buf is entirely devoid of content. nfs4proc.c has this server-side stream initialization helper, but it is visible only to the NFSv4 code. Move this helper to a place that can be accessed by NFSv2 and NFSv3 server XDR functions. Signed-off-by: Chuck Lever <[email protected]>
2021-03-11svcrdma: Revert "svcrdma: Reduce Receive doorbell rate"Chuck Lever1-1/+0
I tested commit 43042b90cae1 ("svcrdma: Reduce Receive doorbell rate") with mlx4 (IB) and software iWARP and didn't find any issues. However, I recently got my hardware iWARP setup back on line (FastLinQ) and it's crashing hard on this commit (confirmed via bisect). The failure mode is complex. - After a connection is established, the first Receive completes normally. - But the second and third Receives have garbage in their Receive buffers. The server responds with ERR_VERS as a result. - When the client tears down the connection to retry, a couple of posted Receives flush twice, and that corrupts the recv_ctxt free list. - __svc_rdma_free then faults or loops infinitely while destroying the xprt's recv_ctxts. Since 43042b90cae1 ("svcrdma: Reduce Receive doorbell rate") does not fix a bug but is a scalability enhancement, it's safe and appropriate to revert it while working on a replacement. Fixes: 43042b90cae1 ("svcrdma: Reduce Receive doorbell rate") Signed-off-by: Chuck Lever <[email protected]>
2021-02-22Merge tag 'nfsd-5.12-1' of ↵Linus Torvalds1-0/+2
git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux Pull more nfsd updates from Chuck Lever: "Here are a few additional NFSD commits for the merge window: Optimization: - Cork the socket while there are queued replies Fixes: - DRC shutdown ordering - svc_rdma_accept() lockdep splat" * tag 'nfsd-5.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux: SUNRPC: Further clean up svc_tcp_sendmsg() SUNRPC: Remove redundant socket flags from svc_tcp_sendmsg() SUNRPC: Use TCP_CORK to optimise send performance on the server svcrdma: Hold private mutex while invoking rdma_accept() nfsd: register pernet ops last, unregister first
2021-02-21Merge tag 'nfsd-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linuxLinus Torvalds4-15/+17
Pull nfsd updates from Chuck Lever: - Update NFSv2 and NFSv3 XDR decoding functions - Further improve support for re-exporting NFS mounts - Convert NFSD stats to per-CPU counters - Add batch Receive posting to the server's RPC/RDMA transport * tag 'nfsd-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux: (65 commits) nfsd: skip some unnecessary stats in the v4 case nfs: use change attribute for NFS re-exports NFSv4_2: SSC helper should use its own config. nfsd: cstate->session->se_client -> cstate->clp nfsd: simplify nfsd4_check_open_reclaim nfsd: remove unused set_client argument nfsd: find_cpntf_state cleanup nfsd: refactor set_client nfsd: rename lookup_clientid->set_client nfsd: simplify nfsd_renew nfsd: simplify process_lock nfsd4: simplify process_lookup1 SUNRPC: Correct a comment svcrdma: DMA-sync the receive buffer in svc_rdma_recvfrom() svcrdma: Reduce Receive doorbell rate svcrdma: Deprecate stat variables that are no longer used svcrdma: Restore read and write stats svcrdma: Convert rdma_stat_sq_starve to a per-CPU counter svcrdma: Convert rdma_stat_recv to a per-CPU counter svcrdma: Refactor svc_rdma_init() and svc_rdma_clean_up() ...
2021-02-16SUNRPC: Use TCP_CORK to optimise send performance on the serverTrond Myklebust1-0/+2
Use a counter to keep track of how many requests are queued behind the xprt->xpt_mutex, and keep TCP_CORK set until the queue is empty. Signed-off-by: Trond Myklebust <[email protected]> Link: https://lore.kernel.org/linux-nfs/[email protected]/T/#u Signed-off-by: Chuck Lever <[email protected]>
2021-01-25SUNRPC: Move simple_get_bytes and simple_get_netobj into private headerDave Wysochanski1-2/+1
Remove duplicated helper functions to parse opaque XDR objects and place inside new file net/sunrpc/auth_gss/auth_gss_internal.h. In the new file carry the license and copyright from the source file net/sunrpc/auth_gss/auth_gss.c. Finally, update the comment inside include/linux/sunrpc/xdr.h since lockd is not the only user of struct xdr_netobj. Signed-off-by: Dave Wysochanski <[email protected]> Signed-off-by: Trond Myklebust <[email protected]>
2021-01-25svcrdma: Reduce Receive doorbell rateChuck Lever1-0/+1
This is similar to commit e340c2d6ef2a ("xprtrdma: Reduce the doorbell rate (Receive)") which added Receive batching to the client. Signed-off-by: Chuck Lever <[email protected]>
2021-01-25svcrdma: Deprecate stat variables that are no longer usedChuck Lever1-5/+0
Clean up. We are not permitted to remove old proc files. Instead, convert these variables to stubs that are only ever allowed to display a value of zero. Signed-off-by: Chuck Lever <[email protected]>
2021-01-25svcrdma: Restore read and write statsChuck Lever1-2/+2
Now that we have an efficient mechanism to update these two stats, let's start maintaining them again. Signed-off-by: Chuck Lever <[email protected]>
2021-01-25svcrdma: Convert rdma_stat_sq_starve to a per-CPU counterChuck Lever1-1/+1
Avoid the overhead of a memory bus lock cycle for counting a value that is hardly every used. Signed-off-by: Chuck Lever <[email protected]>
2021-01-25svcrdma: Convert rdma_stat_recv to a per-CPU counterChuck Lever1-1/+2
Receives are frequent events. Avoid the overhead of a memory bus lock cycle for counting a value that is hardly every used. Signed-off-by: Chuck Lever <[email protected]>
2021-01-25SUNRPC: Move definition of XDR_UNITChuck Lever2-6/+10
Clean up: The unit of XDR alignment is defined by RFC 4506, not as part of the RPC message header. Thus it belongs in include/linux/sunrpc/xdr.h. Signed-off-by: Chuck Lever <[email protected]>
2021-01-25SUNRPC: Make trace_svc_process() display the RPC procedure symbolicallyChuck Lever1-0/+1
The next few patches will employ these strings to help make server- side trace logs more human-readable. A similar technique is already in use in kernel RPC client code. Signed-off-by: Chuck Lever <[email protected]>
2020-12-17Merge tag 'nfs-for-5.11-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfsLinus Torvalds2-15/+15
Pull NFS client updates from Trond Myklebust: "Highlights include: Features: - NFSv3: Add emulation of lookupp() to improve open_by_filehandle() support - A series of patches to improve readdir performance, particularly with large directories - Basic support for using NFS/RDMA with the pNFS files and flexfiles drivers - Micro-optimisations for RDMA - RDMA tracing improvements Bugfixes: - Fix a long standing bug with xs_read_xdr_buf() when receiving partial pages (Dan Aloni) - Various fixes for getxattr and listxattr, when used over non-TCP transports - Fixes for containerised NFS from Sargun Dhillon - switch nfsiod to be an UNBOUND workqueue (Neil Brown) - READDIR should not ask for security label information if there is no LSM policy (Olga Kornievskaia) - Avoid using interval-based rebinding with TCP in lockd (Calum Mackay) - A series of RPC and NFS layer fixes to support the NFSv4.2 READ_PLUS code - A couple of fixes for pnfs/flexfiles read failover Cleanups: - Various cleanups for the SUNRPC xdr code in conjunction with the READ_PLUS fixes" * tag 'nfs-for-5.11-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (90 commits) NFS/pNFS: Fix a typo in ff_layout_resend_pnfs_read() pNFS/flexfiles: Avoid spurious layout returns in ff_layout_choose_ds_for_read NFSv4/pnfs: Add tracing for the deviceid cache fs/lockd: convert comma to semicolon NFSv4.2: fix error return on memory allocation failure NFSv4.2/pnfs: Don't use READ_PLUS with pNFS yet NFSv4.2: Deal with potential READ_PLUS data extent buffer overflow NFSv4.2: Don't error when exiting early on a READ_PLUS buffer overflow NFSv4.2: Handle hole lengths that exceed the READ_PLUS read buffer NFSv4.2: decode_read_plus_hole() needs to check the extent offset NFSv4.2: decode_read_plus_data() must skip padding after data segment NFSv4.2: Ensure we always reset the result->count in decode_read_plus() SUNRPC: When expanding the buffer, we may need grow the sparse pages SUNRPC: Cleanup - constify a number of xdr_buf helpers SUNRPC: Clean up open coded setting of the xdr_stream 'nwords' field SUNRPC: _copy_to/from_pages() now check for zero length SUNRPC: Cleanup xdr_shrink_bufhead() SUNRPC: Fix xdr_expand_hole() SUNRPC: Fixes for xdr_align_data() SUNRPC: _shift_data_left/right_pages should check the shift length ...
2020-12-14SUNRPC: Cleanup - constify a number of xdr_buf helpersTrond Myklebust1-11/+11
There are a number of xdr helpers for struct xdr_buf that do not change the structure itself. Mark those as taking const pointers for documentation purposes. Signed-off-by: Trond Myklebust <[email protected]>
2020-12-14SUNRPC: Fix xdr_expand_hole()Trond Myklebust1-1/+1
We do want to try to grow the buffer if possible, but if that attempt fails, we still want to move the data and truncate the XDR message. Signed-off-by: Trond Myklebust <[email protected]>
2020-12-14SUNRPC: Fixes for xdr_align_data()Trond Myklebust1-1/+1
The main use case right now for xdr_align_data() is to shift the page data to the left, and in practice shrink the total XDR data buffer. This patch ensures that we fix up the accounting for the buffer length as we shift that data around. Signed-off-by: Trond Myklebust <[email protected]>
2020-12-02SUNRPC: Remove unused function xprt_load_transport()Trond Myklebust1-1/+0
Signed-off-by: Trond Myklebust <[email protected]>
2020-12-02SUNRPC: Add a helper to return the transport identifier given a netidTrond Myklebust1-0/+1
Signed-off-by: Trond Myklebust <[email protected]>
2020-12-02SUNRPC: xprt_load_transport() needs to support the netid "rdma6"Trond Myklebust1-0/+1
According to RFC5666, the correct netid for an IPv6 addressed RDMA transport is "rdma6", which we've supported as a mount option since Linux-4.7. The problem is when we try to load the module "xprtrdma6", that will fail, since there is no modulealias of that name. Fixes: 181342c5ebe8 ("xprtrdma: Add rdma6 option to support NFS/RDMA IPv6") Signed-off-by: Trond Myklebust <[email protected]>
2020-11-30NFSD: Add helper for decoding locker4Chuck Lever1-0/+21
Refactor for clarity. Signed-off-by: Chuck Lever <[email protected]>
2020-11-30NFSD: Replace READ* macros in nfsd4_decode_commit()Chuck Lever1-0/+21
Signed-off-by: Chuck Lever <[email protected]>
2020-11-30NFSD: Replace the internals of the READ_BUF() macroChuck Lever1-0/+2
Convert the READ_BUF macro in nfs4xdr.c from open code to instead use the new xdr_stream-style decoders already in use by the encode side (and by the in-kernel NFS client implementation). Once this conversion is done, each individual NFSv4 argument decoder can be independently cleaned up to replace these macros with C code. Signed-off-by: Chuck Lever <[email protected]>
2020-11-30SUNRPC: Prepare for xdr_stream-style decoding on the server-sideChuck Lever1-0/+16
A "permanent" struct xdr_stream is allocated in struct svc_rqst so that it is usable by all server-side decoders. A per-rqst scratch buffer is also allocated to handle decoding XDR data items that cross page boundaries. To demonstrate how it will be used, add the first call site for the new svcxdr_init_decode() API. As an additional part of the overall conversion, add symbolic constants for successful and failed XDR operations. Returning "0" is overloaded. Sometimes it means something failed, but sometimes it means success. To make it more clear when XDR decoding functions succeed or fail, introduce symbolic constants. Signed-off-by: Chuck Lever <[email protected]>
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