Chuck Lever aadc3bbea1 NFSD: Limit the number of concurrent async COPY operations ... Nothing appears to limit the number of concurrent async COPY operations that clients can start. In addition, AFAICT each async COPY can copy an unlimited number of 4MB chunks, so can run for a long time. Thus IMO async COPY can become a DoS vector. Add a restriction mechanism that bounds the number of concurrent background COPY operations. Start simple and try to be fair -- this patch implements a per-namespace limit. An async COPY request that occurs while this limit is exceeded gets NFS4ERR_DELAY. The requesting client can choose to send the request again after a delay or fall back to a traditional read/write style copy. If there is need to make the mechanism more sophisticated, we can visit that in future patches. Cc: stable@vger.kernel.org Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Chuck Lever <chuck.lever@oracle.com>		2024-09-20 19:31:03 -04:00
..
acl.h
auth.c	nfsd: Pass 'cred' instead of 'rqstp' to some functions.	2024-09-20 19:31:03 -04:00
auth.h	nfsd: Pass 'cred' instead of 'rqstp' to some functions.	2024-09-20 19:31:03 -04:00
blocklayout.c	NFSD: Annotate struct pnfs_block_deviceaddr with __counted_by()	2024-09-20 19:31:03 -04:00
blocklayoutxdr.c	NFSD: Make @gdev parameter of ->encode_getdeviceinfo a const pointer	2023-10-16 12:44:29 -04:00
blocklayoutxdr.h	NFSD: Annotate struct pnfs_block_deviceaddr with __counted_by()	2024-09-20 19:31:03 -04:00
cache.h	nfsd: don't allocate the versions array.	2024-09-20 19:29:23 -04:00
current_stateid.h
export.c	nfsd: Move error code mapping to per-version proc code.	2024-09-20 19:31:03 -04:00
export.h	nfsd: Pass 'cred' instead of 'rqstp' to some functions.	2024-09-20 19:31:03 -04:00
filecache.c	nfsd: remove unused parameter of nfsd_file_mark_find_or_create	2024-09-20 19:31:03 -04:00
filecache.h	nfsd: add list_head nf_gc to struct nfsd_file	2024-09-01 10:04:53 -04:00
flexfilelayout.c
flexfilelayoutxdr.c	NFSD: Make @gdev parameter of ->encode_getdeviceinfo a const pointer	2023-10-16 12:44:29 -04:00
flexfilelayoutxdr.h	NFSD: Make @gdev parameter of ->encode_getdeviceinfo a const pointer	2023-10-16 12:44:29 -04:00
idmap.h
Kconfig	NFSD: Fix nfsdcld warning	2024-07-08 14:10:02 -04:00
lockd.c
Makefile	NFSD: introduce netlink stubs	2023-10-16 12:44:09 -04:00
netlink.c	nfsd: new netlink ops to get/set server pool_mode	2024-07-08 14:10:05 -04:00
netlink.h	nfsd: new netlink ops to get/set server pool_mode	2024-07-08 14:10:05 -04:00
netns.h	NFSD: Limit the number of concurrent async COPY operations	2024-09-20 19:31:03 -04:00
nfs2acl.c	NFSD: remove unused structs 'nfsd3_voidargs'	2024-07-08 14:10:01 -04:00
nfs3acl.c	NFSD: remove unused structs 'nfsd3_voidargs'	2024-07-08 14:10:01 -04:00
nfs3proc.c	nfsd: move error choice for incorrect object types to version-specific code.	2024-09-20 19:31:03 -04:00
nfs3xdr.c	nfsd: Fix NFSv3 atomicity bugs in nfsd_setattr()	2024-03-01 09:12:33 -05:00
nfs4acl.c	nfsd: inherit required unset default acls from effective set	2023-08-29 17:45:22 -04:00
nfs4callback.c	nfsd: add more nfsd_cb tracepoints	2024-09-20 19:31:03 -04:00
nfs4idmap.c	nfsd: call cache_put if xdr_reserve_space returns NULL	2024-09-20 19:31:03 -04:00
nfs4layouts.c	nfsd: track the main opcode for callbacks	2024-09-20 19:31:03 -04:00
nfs4proc.c	NFSD: Limit the number of concurrent async COPY operations	2024-09-20 19:31:03 -04:00
nfs4recover.c	nfsd: use clear_and_wake_up_bit()	2024-09-20 19:31:03 -04:00
nfs4state.c	NFSD: Limit the number of concurrent async COPY operations	2024-09-20 19:31:03 -04:00
nfs4xdr.c	NFSD: Fix NFSv4's PUTPUBFH operation	2024-09-20 19:31:03 -04:00
nfscache.c	nfsd: Simplify the allocation of slab caches in nfsd_drc_slab_create	2024-03-01 09:12:24 -05:00
nfsctl.c	sunrpc: change sp_nrthreads from atomic_t to unsigned int.	2024-09-20 19:31:03 -04:00
nfsd.h	nfsd: move error choice for incorrect object types to version-specific code.	2024-09-20 19:31:03 -04:00
nfsfh.c	nfsd: move error choice for incorrect object types to version-specific code.	2024-09-20 19:31:03 -04:00
nfsfh.h	nfsd: further centralize protocol version checks.	2024-09-20 19:31:03 -04:00
nfsproc.c	nfsd: move error choice for incorrect object types to version-specific code.	2024-09-20 19:31:03 -04:00
nfssvc.c	nfsd: use nfsd_v4client() in nfsd_breaker_owns_lease()	2024-09-20 19:31:03 -04:00
nfsxdr.c	NFSD: Ensure that xdr_write_pages updates rq_next_page	2023-06-05 09:01:44 -04:00
pnfs.h	nfsd: allow layout state to be admin-revoked.	2024-03-01 09:12:22 -05:00
state.h	nfsd: track the main opcode for callbacks	2024-09-20 19:31:03 -04:00
stats.c	fs: nfsd: use group allocation/free of per-cpu counters API	2024-05-06 09:07:17 -04:00
stats.h	fs: nfsd: use group allocation/free of per-cpu counters API	2024-05-06 09:07:17 -04:00
trace.c
trace.h	nfsd: add more nfsd_cb tracepoints	2024-09-20 19:31:03 -04:00
vfs.c	nfsd: map the EBADMSG to nfserr_io to avoid warning	2024-09-20 19:31:03 -04:00
vfs.h	nfsd: Pass 'cred' instead of 'rqstp' to some functions.	2024-09-20 19:31:03 -04:00
xdr3.h	nfsd: Fix NFSv3 atomicity bugs in nfsd_setattr()	2024-03-01 09:12:33 -05:00
xdr4.h	NFSD: Limit the number of concurrent async COPY operations	2024-09-20 19:31:03 -04:00
xdr4cb.h	NFSD: add support for CB_GETATTR callback	2024-03-01 09:12:31 -05:00
xdr.h