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76ce4dcec0
linux/fs/nfsd
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Chuck Lever 76ce4dcec0 NFSD: Cap rsize_bop result based on send buffer size 
Since before the git era, NFSD has conserved the number of pages
held by each nfsd thread by combining the RPC receive and send
buffers into a single array of pages. This works because there are
no cases where an operation needs a large RPC Call message and a
large RPC Reply at the same time.

Once an RPC Call has been received, svc_process() updates
svc_rqst::rq_res to describe the part of rq_pages that can be
used for constructing the Reply. This means that the send buffer
(rq_res) shrinks when the received RPC record containing the RPC
Call is large.

Add an NFSv4 helper that computes the size of the send buffer. It
replaces svc_max_payload() in spots where svc_max_payload() returns
a value that might be larger than the remaining send buffer space.
Callers who need to know the transport's actual maximum payload size
will continue to use svc_max_payload().

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2022-09-26 14:02:50 -04:00
..
acl.h NFSD: add posix ACLs to struct nfsd_attrs 2022-08-04 10:28:03 -04:00
auth.c
auth.h
blocklayout.c block: remove genhd.h 2022-02-02 07:49:59 -07:00
blocklayoutxdr.c
blocklayoutxdr.h
cache.h nfsd: use DEFINE_SHOW_ATTRIBUTE to define nfsd_reply_cache_stats_fops 2022-09-26 14:02:50 -04:00
current_stateid.h
export.c fs: add is_idmapped_mnt() helper 2021-12-03 18:44:06 +01:00
export.h nfsd: report per-export stats 2021-01-25 09:36:28 -05:00
fault_inject.c nfsd: no need to check return value of debugfs_create functions 2019-07-03 16:57:17 +02:00
filecache.c nfsd: use DEFINE_SHOW_ATTRIBUTE to define nfsd_file_cache_stats_fops 2022-09-26 14:02:50 -04:00
filecache.h nfsd: use DEFINE_SHOW_ATTRIBUTE to define nfsd_file_cache_stats_fops 2022-09-26 14:02:50 -04:00
flexfilelayout.c nfsd: use correct format characters 2022-03-17 19:47:38 -04:00
flexfilelayoutxdr.c
flexfilelayoutxdr.h
idmap.h
Kconfig NFSD: Remove CONFIG_NFSD_V3 2022-03-11 10:25:14 -05:00
lockd.c NFSD: simplify struct nfsfh 2021-10-02 15:51:10 -04:00
Makefile NFSD: Remove CONFIG_NFSD_V3 2022-03-11 10:25:14 -05:00
netns.h NFSD: add shrinker to reap courtesy clients on low memory condition 2022-09-26 14:02:41 -04:00
nfs2acl.c SUNRPC: Parametrize how much of argsize should be zeroed 2022-09-26 14:02:42 -04:00
nfs3acl.c SUNRPC: Parametrize how much of argsize should be zeroed 2022-09-26 14:02:42 -04:00
nfs3proc.c NFSD: Refactor common code out of dirlist helpers 2022-09-26 14:02:47 -04:00
nfs3xdr.c NFSD: Clean up WRITE arg decoders 2022-09-26 14:02:47 -04:00
nfs4acl.c NFSD: add posix ACLs to struct nfsd_attrs 2022-08-04 10:28:03 -04:00
nfs4callback.c NFSD: Move copy offload callback arguments into a separate structure 2022-07-29 20:17:00 -04:00
nfs4idmap.c NFSD: move from strlcpy with unused retval to strscpy 2022-09-26 14:02:20 -04:00
nfs4layouts.c NFSD: Add tracepoints to report NFSv4 callback completions 2022-09-26 14:02:32 -04:00
nfs4proc.c NFSD: Cap rsize_bop result based on send buffer size 2022-09-26 14:02:50 -04:00
nfs4recover.c nfsd: Propagate some error code returned by memdup_user() 2022-09-26 14:02:22 -04:00
nfs4state.c NFSD: Rename the fields in copy_stateid_t 2022-09-26 14:02:50 -04:00
nfs4xdr.c NFSD: Clean up nfs4svc_encode_compoundres() 2022-09-26 14:02:48 -04:00
nfscache.c nfsd: use DEFINE_SHOW_ATTRIBUTE to define nfsd_reply_cache_stats_fops 2022-09-26 14:02:50 -04:00
nfsctl.c nfsd: use DEFINE_SHOW_ATTRIBUTE to define nfsd_file_cache_stats_fops 2022-09-26 14:02:50 -04:00
nfsd.h NFSD: add shrinker to reap courtesy clients on low memory condition 2022-09-26 14:02:41 -04:00
nfsfh.c NFSD: Replace dprintk() call site in fh_verify() 2022-09-26 14:02:31 -04:00
nfsfh.h NFSD: discard fh_locked flag and fh_lock/fh_unlock 2022-08-04 10:28:48 -04:00
nfsproc.c NFSD: Refactor common code out of dirlist helpers 2022-09-26 14:02:47 -04:00
nfssvc.c NFSD: move from strlcpy with unused retval to strscpy 2022-09-26 14:02:20 -04:00
nfsxdr.c NFSD: Clean up WRITE arg decoders 2022-09-26 14:02:47 -04:00
pnfs.h
state.h NFSD: Rename the fields in copy_stateid_t 2022-09-26 14:02:50 -04:00
stats.c nfsd: use DEFINE_PROC_SHOW_ATTRIBUTE to define nfsd_proc_ops 2022-09-26 14:02:49 -04:00
stats.h nfsd: make nfsd_stats.th_cnt atomic_t 2021-12-13 13:42:51 -05:00
trace.c NFSD: Add SPDX header for fs/nfsd/trace.c 2020-11-30 13:00:24 -05:00
trace.h NFSD: Add a mechanism to wait for a DELEGRETURN 2022-09-26 14:02:32 -04:00
vfs.c NFSD: Make nfsd4_remove() wait before returning NFS4ERR_DELAY 2022-09-26 14:02:41 -04:00
vfs.h NFSD: drop fname and flen args from nfsd_create_locked() 2022-09-26 14:02:30 -04:00
xdr3.h SUNRPC: Change return value type of .pc_encode 2021-10-13 11:34:49 -04:00
xdr4.h NFSD: Pack struct nfsd4_compoundres 2022-09-26 14:02:49 -04:00
xdr4cb.h
xdr.h NFSD: prevent underflow in nfssvc_decode_writeargs() 2022-03-15 09:35:56 -04:00