[RFC PATCH 2/3] NFSD: Make nfsd_genl_rqstp::rq_ops array best-effort
From: Chuck Lever <cel@kernel.org>
Date: 2025-06-10 16:05:14
Subsystem:
filesystems (vfs and infrastructure), kernel nfsd, sunrpc, and lockd servers, the rest · Maintainers:
Alexander Viro, Christian Brauner, Chuck Lever, Jeff Layton, Linus Torvalds
From: Chuck Lever <chuck.lever@oracle.com> To enable NFSD to handle NFSv4 COMPOUNDs of unrestricted size, resize the array in struct nfsd_genl_rqstp so it saves only up to 16 operations per COMPOUND. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> --- fs/nfsd/nfsctl.c | 3 ++- fs/nfsd/nfsd.h | 2 +- 2 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index b9b2189ce880..1e0ebcc3216c 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c@@ -1569,7 +1569,8 @@ int nfsd_nl_rpc_status_get_dumpit(struct sk_buff *skb, int j; args = rqstp->rq_argp; - genl_rqstp.rq_opcnt = args->opcnt; + genl_rqstp.rq_opcnt = min_t(u32, args->opcnt, + ARRAY_SIZE(genl_rqstp.rq_opnum)); for (j = 0; j < genl_rqstp.rq_opcnt; j++) genl_rqstp.rq_opnum[j] = args->ops[j].opnum;
diff --git a/fs/nfsd/nfsd.h b/fs/nfsd/nfsd.h
index 1bfd0b4e9af7..570065285e67 100644
--- a/fs/nfsd/nfsd.h
+++ b/fs/nfsd/nfsd.h@@ -72,7 +72,7 @@ struct nfsd_genl_rqstp { /* NFSv4 compound */ u32 rq_opcnt; - u32 rq_opnum[NFSD_MAX_OPS_PER_COMPOUND]; + u32 rq_opnum[16]; }; extern struct svc_program nfsd_programs[];
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2.49.0