diff options
| author | J. Bruce Fields <bfields@redhat.com> | 2013-02-28 21:51:49 +0100 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2013-04-03 17:47:53 +0200 |
| commit | 9d313b17db965ae42137c5d4dd3063037544c4cd (patch) | |
| tree | eaf39419bb8dcf2775570aa14ca12552655a69f1 /fs/nfsd | |
| parent | nfsd4: remove BUG_ON (diff) | |
| download | linux-9d313b17db965ae42137c5d4dd3063037544c4cd.tar.xz linux-9d313b17db965ae42137c5d4dd3063037544c4cd.zip | |
nfsd4: handle seqid-mutating open errors from xdr decoding
If a client sets an owner (or group_owner or acl) attribute on open for
create, and the mapping of that owner to an id fails, then we return
BAD_OWNER. But BAD_OWNER is a seqid-mutating error, so we can't
shortcut the open processing that case: we have to at least look up the
owner so we can find the seqid to bump.
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'fs/nfsd')
| -rw-r--r-- | fs/nfsd/nfs4proc.c | 27 | ||||
| -rw-r--r-- | fs/nfsd/nfs4xdr.c | 1 | ||||
| -rw-r--r-- | fs/nfsd/xdr4.h | 1 |
3 files changed, 28 insertions, 1 deletions
diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c index c7e4e8c28827..42c498ce9f0e 100644 --- a/fs/nfsd/nfs4proc.c +++ b/fs/nfsd/nfs4proc.c @@ -351,6 +351,10 @@ nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, } if (status) goto out; + if (open->op_xdr_error) { + status = open->op_xdr_error; + goto out; + } status = nfsd4_check_open_attributes(rqstp, cstate, open); if (status) @@ -417,6 +421,24 @@ out: } /* + * OPEN is the only seqid-mutating operation whose decoding can fail + * with a seqid-mutating error (specifically, decoding of user names in + * the attributes). Therefore we have to do some processing to look up + * the stateowner so that we can bump the seqid. + */ +static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op) +{ + struct nfsd4_open *open = (struct nfsd4_open *)&op->u; + + if (!seqid_mutating_err(ntohl(op->status))) + return op->status; + if (nfsd4_has_session(cstate)) + return op->status; + open->op_xdr_error = op->status; + return nfsd4_open(rqstp, cstate, open); +} + +/* * filehandle-manipulating ops. */ static __be32 @@ -1244,8 +1266,11 @@ nfsd4_proc_compound(struct svc_rqst *rqstp, * for example, if there is a miscellaneous XDR error * it will be set to nfserr_bad_xdr. */ - if (op->status) + if (op->status) { + if (op->opnum == OP_OPEN) + op->status = nfsd4_open_omfg(rqstp, cstate, op); goto encode_op; + } /* We must be able to encode a successful response to * this operation, with enough room left over to encode a diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c index a2720071f282..229b3ac246e1 100644 --- a/fs/nfsd/nfs4xdr.c +++ b/fs/nfsd/nfs4xdr.c @@ -804,6 +804,7 @@ nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) open->op_iattr.ia_valid = 0; open->op_openowner = NULL; + open->op_xdr_error = 0; /* seqid, share_access, share_deny, clientid, ownerlen */ READ_BUF(4); READ32(open->op_seqid); diff --git a/fs/nfsd/xdr4.h b/fs/nfsd/xdr4.h index 546f8983ecf1..be0a79d1dbcb 100644 --- a/fs/nfsd/xdr4.h +++ b/fs/nfsd/xdr4.h @@ -237,6 +237,7 @@ struct nfsd4_open { u32 op_share_deny; /* request */ u32 op_deleg_want; /* request */ stateid_t op_stateid; /* response */ + __be32 op_xdr_error; /* see nfsd4_open_omfg() */ u32 op_recall; /* recall */ struct nfsd4_change_info op_cinfo; /* response */ u32 op_rflags; /* response */ |