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| author | Chuck Lever <chuck.lever@oracle.com> | 2023-07-19 11:33:09 -0400 |
|---|---|---|
| committer | Chuck Lever <chuck.lever@oracle.com> | 2023-08-29 17:45:22 -0400 |
| commit | 50bce06f0e7993aeaa03d39a8f8979b31e5862bd (patch) | |
| tree | 0da8fcea9ed2552fc7016e2407f73a2c981e97aa | |
| parent | fd19ca36fd782b84f71b86525b91a905cda913a4 (diff) | |
| download | linux-starfive-50bce06f0e7993aeaa03d39a8f8979b31e5862bd.tar.gz linux-starfive-50bce06f0e7993aeaa03d39a8f8979b31e5862bd.tar.bz2 linux-starfive-50bce06f0e7993aeaa03d39a8f8979b31e5862bd.zip | |
NFSD: Report zero space limit for write delegations
Replace the -1 (no limit) with a zero (no reserved space).
This prevents certain non-determinant client behavior, such as
silly-renaming a file when the only open reference is a write
delegation. Such a rename can leave unexpected .nfs files in a
directory that is otherwise supposed to be empty.
Note that other server implementations that support write delegation
also set this field to zero.
Suggested-by: Dai Ngo <dai.ngo@oracle.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
| -rw-r--r-- | fs/nfsd/nfs4xdr.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c index 95aafe52fa0c..d4de39404cde 100644 --- a/fs/nfsd/nfs4xdr.c +++ b/fs/nfsd/nfs4xdr.c @@ -3978,17 +3978,20 @@ nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid); if (nfserr) return nfserr; - p = xdr_reserve_space(xdr, 32); + + p = xdr_reserve_space(xdr, XDR_UNIT * 8); if (!p) return nfserr_resource; *p++ = cpu_to_be32(open->op_recall); /* + * Always flush on close + * * TODO: space_limit's in delegations */ *p++ = cpu_to_be32(NFS4_LIMIT_SIZE); - *p++ = cpu_to_be32(~(u32)0); - *p++ = cpu_to_be32(~(u32)0); + *p++ = xdr_zero; + *p++ = xdr_zero; /* * TODO: ACE's in delegations |