mirror of https://gitee.com/openkylin/linux.git
NFS: Convert NFSv3 to use the container user namespace
When mapping NFS identities, we want to substitute for the uids and gids on the wire as we would for the AUTH_UNIX creds. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
parent
ac83228a71
commit
264d948ce7
142
fs/nfs/nfs3xdr.c
142
fs/nfs/nfs3xdr.c
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@ -104,6 +104,20 @@ static const umode_t nfs_type2fmt[] = {
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[NF3FIFO] = S_IFIFO,
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};
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static struct user_namespace *rpc_userns(const struct rpc_clnt *clnt)
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{
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if (clnt && clnt->cl_cred)
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return clnt->cl_cred->user_ns;
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return &init_user_ns;
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}
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static struct user_namespace *rpc_rqst_userns(const struct rpc_rqst *rqstp)
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{
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if (rqstp->rq_task)
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return rpc_userns(rqstp->rq_task->tk_client);
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return &init_user_ns;
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}
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/*
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* Encode/decode NFSv3 basic data types
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*
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@ -516,7 +530,8 @@ static __be32 *xdr_decode_nfstime3(__be32 *p, struct timespec *timep)
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* set_mtime mtime;
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* };
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*/
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static void encode_sattr3(struct xdr_stream *xdr, const struct iattr *attr)
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static void encode_sattr3(struct xdr_stream *xdr, const struct iattr *attr,
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struct user_namespace *userns)
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{
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struct timespec ts;
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u32 nbytes;
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@ -551,13 +566,13 @@ static void encode_sattr3(struct xdr_stream *xdr, const struct iattr *attr)
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if (attr->ia_valid & ATTR_UID) {
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*p++ = xdr_one;
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*p++ = cpu_to_be32(from_kuid(&init_user_ns, attr->ia_uid));
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*p++ = cpu_to_be32(from_kuid_munged(userns, attr->ia_uid));
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} else
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*p++ = xdr_zero;
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if (attr->ia_valid & ATTR_GID) {
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*p++ = xdr_one;
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*p++ = cpu_to_be32(from_kgid(&init_user_ns, attr->ia_gid));
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*p++ = cpu_to_be32(from_kgid_munged(userns, attr->ia_gid));
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} else
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*p++ = xdr_zero;
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@ -606,7 +621,8 @@ static void encode_sattr3(struct xdr_stream *xdr, const struct iattr *attr)
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* nfstime3 ctime;
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* };
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*/
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static int decode_fattr3(struct xdr_stream *xdr, struct nfs_fattr *fattr)
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static int decode_fattr3(struct xdr_stream *xdr, struct nfs_fattr *fattr,
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struct user_namespace *userns)
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{
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umode_t fmode;
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__be32 *p;
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@ -619,10 +635,10 @@ static int decode_fattr3(struct xdr_stream *xdr, struct nfs_fattr *fattr)
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fattr->mode = (be32_to_cpup(p++) & ~S_IFMT) | fmode;
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fattr->nlink = be32_to_cpup(p++);
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fattr->uid = make_kuid(&init_user_ns, be32_to_cpup(p++));
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fattr->uid = make_kuid(userns, be32_to_cpup(p++));
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if (!uid_valid(fattr->uid))
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goto out_uid;
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fattr->gid = make_kgid(&init_user_ns, be32_to_cpup(p++));
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fattr->gid = make_kgid(userns, be32_to_cpup(p++));
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if (!gid_valid(fattr->gid))
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goto out_gid;
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@ -659,7 +675,8 @@ static int decode_fattr3(struct xdr_stream *xdr, struct nfs_fattr *fattr)
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* void;
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* };
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*/
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static int decode_post_op_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr)
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static int decode_post_op_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
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struct user_namespace *userns)
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{
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__be32 *p;
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@ -667,7 +684,7 @@ static int decode_post_op_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr)
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if (unlikely(!p))
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return -EIO;
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if (*p != xdr_zero)
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return decode_fattr3(xdr, fattr);
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return decode_fattr3(xdr, fattr, userns);
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return 0;
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}
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@ -728,14 +745,15 @@ static int decode_pre_op_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr)
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return 0;
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}
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static int decode_wcc_data(struct xdr_stream *xdr, struct nfs_fattr *fattr)
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static int decode_wcc_data(struct xdr_stream *xdr, struct nfs_fattr *fattr,
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struct user_namespace *userns)
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{
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int error;
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error = decode_pre_op_attr(xdr, fattr);
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if (unlikely(error))
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goto out;
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error = decode_post_op_attr(xdr, fattr);
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error = decode_post_op_attr(xdr, fattr, userns);
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out:
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return error;
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}
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@ -837,7 +855,7 @@ static void nfs3_xdr_enc_setattr3args(struct rpc_rqst *req,
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{
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const struct nfs3_sattrargs *args = data;
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encode_nfs_fh3(xdr, args->fh);
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encode_sattr3(xdr, args->sattr);
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encode_sattr3(xdr, args->sattr, rpc_rqst_userns(req));
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encode_sattrguard3(xdr, args);
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}
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@ -998,13 +1016,14 @@ static void nfs3_xdr_enc_write3args(struct rpc_rqst *req,
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* };
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*/
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static void encode_createhow3(struct xdr_stream *xdr,
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const struct nfs3_createargs *args)
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const struct nfs3_createargs *args,
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struct user_namespace *userns)
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{
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encode_uint32(xdr, args->createmode);
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switch (args->createmode) {
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case NFS3_CREATE_UNCHECKED:
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case NFS3_CREATE_GUARDED:
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encode_sattr3(xdr, args->sattr);
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encode_sattr3(xdr, args->sattr, userns);
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break;
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case NFS3_CREATE_EXCLUSIVE:
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encode_createverf3(xdr, args->verifier);
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@ -1021,7 +1040,7 @@ static void nfs3_xdr_enc_create3args(struct rpc_rqst *req,
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const struct nfs3_createargs *args = data;
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encode_diropargs3(xdr, args->fh, args->name, args->len);
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encode_createhow3(xdr, args);
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encode_createhow3(xdr, args, rpc_rqst_userns(req));
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}
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/*
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@ -1039,7 +1058,7 @@ static void nfs3_xdr_enc_mkdir3args(struct rpc_rqst *req,
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const struct nfs3_mkdirargs *args = data;
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encode_diropargs3(xdr, args->fh, args->name, args->len);
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encode_sattr3(xdr, args->sattr);
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encode_sattr3(xdr, args->sattr, rpc_rqst_userns(req));
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}
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/*
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@ -1056,11 +1075,12 @@ static void nfs3_xdr_enc_mkdir3args(struct rpc_rqst *req,
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* };
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*/
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static void encode_symlinkdata3(struct xdr_stream *xdr,
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const void *data)
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const void *data,
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struct user_namespace *userns)
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{
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const struct nfs3_symlinkargs *args = data;
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encode_sattr3(xdr, args->sattr);
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encode_sattr3(xdr, args->sattr, userns);
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encode_nfspath3(xdr, args->pages, args->pathlen);
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}
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@ -1071,7 +1091,7 @@ static void nfs3_xdr_enc_symlink3args(struct rpc_rqst *req,
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const struct nfs3_symlinkargs *args = data;
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encode_diropargs3(xdr, args->fromfh, args->fromname, args->fromlen);
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encode_symlinkdata3(xdr, args);
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encode_symlinkdata3(xdr, args, rpc_rqst_userns(req));
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xdr->buf->flags |= XDRBUF_WRITE;
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}
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@ -1100,24 +1120,26 @@ static void nfs3_xdr_enc_symlink3args(struct rpc_rqst *req,
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* };
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*/
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static void encode_devicedata3(struct xdr_stream *xdr,
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const struct nfs3_mknodargs *args)
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const struct nfs3_mknodargs *args,
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struct user_namespace *userns)
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{
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encode_sattr3(xdr, args->sattr);
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encode_sattr3(xdr, args->sattr, userns);
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encode_specdata3(xdr, args->rdev);
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}
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static void encode_mknoddata3(struct xdr_stream *xdr,
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const struct nfs3_mknodargs *args)
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const struct nfs3_mknodargs *args,
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struct user_namespace *userns)
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{
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encode_ftype3(xdr, args->type);
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switch (args->type) {
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case NF3CHR:
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case NF3BLK:
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encode_devicedata3(xdr, args);
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encode_devicedata3(xdr, args, userns);
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break;
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case NF3SOCK:
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case NF3FIFO:
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encode_sattr3(xdr, args->sattr);
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encode_sattr3(xdr, args->sattr, userns);
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break;
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case NF3REG:
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case NF3DIR:
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@ -1134,7 +1156,7 @@ static void nfs3_xdr_enc_mknod3args(struct rpc_rqst *req,
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const struct nfs3_mknodargs *args = data;
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encode_diropargs3(xdr, args->fh, args->name, args->len);
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encode_mknoddata3(xdr, args);
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encode_mknoddata3(xdr, args, rpc_rqst_userns(req));
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}
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/*
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@ -1379,7 +1401,7 @@ static int nfs3_xdr_dec_getattr3res(struct rpc_rqst *req,
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goto out;
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if (status != NFS3_OK)
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goto out_default;
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error = decode_fattr3(xdr, result);
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error = decode_fattr3(xdr, result, rpc_rqst_userns(req));
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out:
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return error;
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out_default:
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@ -1414,7 +1436,7 @@ static int nfs3_xdr_dec_setattr3res(struct rpc_rqst *req,
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error = decode_nfsstat3(xdr, &status);
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if (unlikely(error))
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goto out;
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error = decode_wcc_data(xdr, result);
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error = decode_wcc_data(xdr, result, rpc_rqst_userns(req));
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if (unlikely(error))
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goto out;
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if (status != NFS3_OK)
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@ -1449,6 +1471,7 @@ static int nfs3_xdr_dec_lookup3res(struct rpc_rqst *req,
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struct xdr_stream *xdr,
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void *data)
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{
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struct user_namespace *userns = rpc_rqst_userns(req);
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struct nfs3_diropres *result = data;
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enum nfs_stat status;
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int error;
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@ -1461,14 +1484,14 @@ static int nfs3_xdr_dec_lookup3res(struct rpc_rqst *req,
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error = decode_nfs_fh3(xdr, result->fh);
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if (unlikely(error))
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goto out;
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error = decode_post_op_attr(xdr, result->fattr);
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error = decode_post_op_attr(xdr, result->fattr, userns);
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if (unlikely(error))
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goto out;
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error = decode_post_op_attr(xdr, result->dir_attr);
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error = decode_post_op_attr(xdr, result->dir_attr, userns);
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out:
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return error;
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out_default:
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error = decode_post_op_attr(xdr, result->dir_attr);
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error = decode_post_op_attr(xdr, result->dir_attr, userns);
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if (unlikely(error))
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goto out;
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return nfs3_stat_to_errno(status);
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@ -1504,7 +1527,7 @@ static int nfs3_xdr_dec_access3res(struct rpc_rqst *req,
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error = decode_nfsstat3(xdr, &status);
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if (unlikely(error))
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goto out;
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error = decode_post_op_attr(xdr, result->fattr);
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error = decode_post_op_attr(xdr, result->fattr, rpc_rqst_userns(req));
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if (unlikely(error))
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goto out;
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if (status != NFS3_OK)
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@ -1545,7 +1568,7 @@ static int nfs3_xdr_dec_readlink3res(struct rpc_rqst *req,
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error = decode_nfsstat3(xdr, &status);
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if (unlikely(error))
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goto out;
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error = decode_post_op_attr(xdr, result);
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error = decode_post_op_attr(xdr, result, rpc_rqst_userns(req));
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if (unlikely(error))
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goto out;
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if (status != NFS3_OK)
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@ -1623,7 +1646,7 @@ static int nfs3_xdr_dec_read3res(struct rpc_rqst *req, struct xdr_stream *xdr,
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error = decode_nfsstat3(xdr, &status);
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if (unlikely(error))
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goto out;
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error = decode_post_op_attr(xdr, result->fattr);
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error = decode_post_op_attr(xdr, result->fattr, rpc_rqst_userns(req));
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if (unlikely(error))
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goto out;
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result->op_status = status;
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@ -1694,7 +1717,7 @@ static int nfs3_xdr_dec_write3res(struct rpc_rqst *req, struct xdr_stream *xdr,
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error = decode_nfsstat3(xdr, &status);
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if (unlikely(error))
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goto out;
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error = decode_wcc_data(xdr, result->fattr);
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error = decode_wcc_data(xdr, result->fattr, rpc_rqst_userns(req));
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if (unlikely(error))
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goto out;
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result->op_status = status;
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@ -1728,14 +1751,15 @@ static int nfs3_xdr_dec_write3res(struct rpc_rqst *req, struct xdr_stream *xdr,
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* };
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*/
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static int decode_create3resok(struct xdr_stream *xdr,
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struct nfs3_diropres *result)
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struct nfs3_diropres *result,
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struct user_namespace *userns)
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{
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int error;
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error = decode_post_op_fh3(xdr, result->fh);
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if (unlikely(error))
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goto out;
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error = decode_post_op_attr(xdr, result->fattr);
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error = decode_post_op_attr(xdr, result->fattr, userns);
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if (unlikely(error))
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goto out;
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/* The server isn't required to return a file handle.
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@ -1744,7 +1768,7 @@ static int decode_create3resok(struct xdr_stream *xdr,
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* values for the new object. */
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if (result->fh->size == 0)
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result->fattr->valid = 0;
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error = decode_wcc_data(xdr, result->dir_attr);
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error = decode_wcc_data(xdr, result->dir_attr, userns);
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out:
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return error;
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}
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@ -1753,6 +1777,7 @@ static int nfs3_xdr_dec_create3res(struct rpc_rqst *req,
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struct xdr_stream *xdr,
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void *data)
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{
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struct user_namespace *userns = rpc_rqst_userns(req);
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struct nfs3_diropres *result = data;
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enum nfs_stat status;
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int error;
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@ -1762,11 +1787,11 @@ static int nfs3_xdr_dec_create3res(struct rpc_rqst *req,
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goto out;
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if (status != NFS3_OK)
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goto out_default;
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error = decode_create3resok(xdr, result);
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error = decode_create3resok(xdr, result, userns);
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out:
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return error;
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out_default:
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error = decode_wcc_data(xdr, result->dir_attr);
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error = decode_wcc_data(xdr, result->dir_attr, userns);
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if (unlikely(error))
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goto out;
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return nfs3_stat_to_errno(status);
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@ -1801,7 +1826,7 @@ static int nfs3_xdr_dec_remove3res(struct rpc_rqst *req,
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error = decode_nfsstat3(xdr, &status);
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if (unlikely(error))
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goto out;
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error = decode_wcc_data(xdr, result->dir_attr);
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error = decode_wcc_data(xdr, result->dir_attr, rpc_rqst_userns(req));
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if (unlikely(error))
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goto out;
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if (status != NFS3_OK)
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@ -1836,6 +1861,7 @@ static int nfs3_xdr_dec_rename3res(struct rpc_rqst *req,
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struct xdr_stream *xdr,
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void *data)
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{
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struct user_namespace *userns = rpc_rqst_userns(req);
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struct nfs_renameres *result = data;
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enum nfs_stat status;
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int error;
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@ -1843,10 +1869,10 @@ static int nfs3_xdr_dec_rename3res(struct rpc_rqst *req,
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error = decode_nfsstat3(xdr, &status);
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if (unlikely(error))
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goto out;
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error = decode_wcc_data(xdr, result->old_fattr);
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error = decode_wcc_data(xdr, result->old_fattr, userns);
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if (unlikely(error))
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goto out;
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error = decode_wcc_data(xdr, result->new_fattr);
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error = decode_wcc_data(xdr, result->new_fattr, userns);
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if (unlikely(error))
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goto out;
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if (status != NFS3_OK)
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@ -1880,6 +1906,7 @@ static int nfs3_xdr_dec_rename3res(struct rpc_rqst *req,
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static int nfs3_xdr_dec_link3res(struct rpc_rqst *req, struct xdr_stream *xdr,
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||||
void *data)
|
||||
{
|
||||
struct user_namespace *userns = rpc_rqst_userns(req);
|
||||
struct nfs3_linkres *result = data;
|
||||
enum nfs_stat status;
|
||||
int error;
|
||||
|
@ -1887,10 +1914,10 @@ static int nfs3_xdr_dec_link3res(struct rpc_rqst *req, struct xdr_stream *xdr,
|
|||
error = decode_nfsstat3(xdr, &status);
|
||||
if (unlikely(error))
|
||||
goto out;
|
||||
error = decode_post_op_attr(xdr, result->fattr);
|
||||
error = decode_post_op_attr(xdr, result->fattr, userns);
|
||||
if (unlikely(error))
|
||||
goto out;
|
||||
error = decode_wcc_data(xdr, result->dir_attr);
|
||||
error = decode_wcc_data(xdr, result->dir_attr, userns);
|
||||
if (unlikely(error))
|
||||
goto out;
|
||||
if (status != NFS3_OK)
|
||||
|
@ -1939,6 +1966,7 @@ static int nfs3_xdr_dec_link3res(struct rpc_rqst *req, struct xdr_stream *xdr,
|
|||
int nfs3_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
|
||||
bool plus)
|
||||
{
|
||||
struct user_namespace *userns = rpc_userns(entry->server->client);
|
||||
struct nfs_entry old = *entry;
|
||||
__be32 *p;
|
||||
int error;
|
||||
|
@ -1973,7 +2001,7 @@ int nfs3_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
|
|||
|
||||
if (plus) {
|
||||
entry->fattr->valid = 0;
|
||||
error = decode_post_op_attr(xdr, entry->fattr);
|
||||
error = decode_post_op_attr(xdr, entry->fattr, userns);
|
||||
if (unlikely(error))
|
||||
return error;
|
||||
if (entry->fattr->valid & NFS_ATTR_FATTR_V3)
|
||||
|
@ -2045,11 +2073,12 @@ static int decode_dirlist3(struct xdr_stream *xdr)
|
|||
}
|
||||
|
||||
static int decode_readdir3resok(struct xdr_stream *xdr,
|
||||
struct nfs3_readdirres *result)
|
||||
struct nfs3_readdirres *result,
|
||||
struct user_namespace *userns)
|
||||
{
|
||||
int error;
|
||||
|
||||
error = decode_post_op_attr(xdr, result->dir_attr);
|
||||
error = decode_post_op_attr(xdr, result->dir_attr, userns);
|
||||
if (unlikely(error))
|
||||
goto out;
|
||||
/* XXX: do we need to check if result->verf != NULL ? */
|
||||
|
@ -2074,11 +2103,11 @@ static int nfs3_xdr_dec_readdir3res(struct rpc_rqst *req,
|
|||
goto out;
|
||||
if (status != NFS3_OK)
|
||||
goto out_default;
|
||||
error = decode_readdir3resok(xdr, result);
|
||||
error = decode_readdir3resok(xdr, result, rpc_rqst_userns(req));
|
||||
out:
|
||||
return error;
|
||||
out_default:
|
||||
error = decode_post_op_attr(xdr, result->dir_attr);
|
||||
error = decode_post_op_attr(xdr, result->dir_attr, rpc_rqst_userns(req));
|
||||
if (unlikely(error))
|
||||
goto out;
|
||||
return nfs3_stat_to_errno(status);
|
||||
|
@ -2138,7 +2167,7 @@ static int nfs3_xdr_dec_fsstat3res(struct rpc_rqst *req,
|
|||
error = decode_nfsstat3(xdr, &status);
|
||||
if (unlikely(error))
|
||||
goto out;
|
||||
error = decode_post_op_attr(xdr, result->fattr);
|
||||
error = decode_post_op_attr(xdr, result->fattr, rpc_rqst_userns(req));
|
||||
if (unlikely(error))
|
||||
goto out;
|
||||
if (status != NFS3_OK)
|
||||
|
@ -2212,7 +2241,7 @@ static int nfs3_xdr_dec_fsinfo3res(struct rpc_rqst *req,
|
|||
error = decode_nfsstat3(xdr, &status);
|
||||
if (unlikely(error))
|
||||
goto out;
|
||||
error = decode_post_op_attr(xdr, result->fattr);
|
||||
error = decode_post_op_attr(xdr, result->fattr, rpc_rqst_userns(req));
|
||||
if (unlikely(error))
|
||||
goto out;
|
||||
if (status != NFS3_OK)
|
||||
|
@ -2273,7 +2302,7 @@ static int nfs3_xdr_dec_pathconf3res(struct rpc_rqst *req,
|
|||
error = decode_nfsstat3(xdr, &status);
|
||||
if (unlikely(error))
|
||||
goto out;
|
||||
error = decode_post_op_attr(xdr, result->fattr);
|
||||
error = decode_post_op_attr(xdr, result->fattr, rpc_rqst_userns(req));
|
||||
if (unlikely(error))
|
||||
goto out;
|
||||
if (status != NFS3_OK)
|
||||
|
@ -2315,7 +2344,7 @@ static int nfs3_xdr_dec_commit3res(struct rpc_rqst *req,
|
|||
error = decode_nfsstat3(xdr, &status);
|
||||
if (unlikely(error))
|
||||
goto out;
|
||||
error = decode_wcc_data(xdr, result->fattr);
|
||||
error = decode_wcc_data(xdr, result->fattr, rpc_rqst_userns(req));
|
||||
if (unlikely(error))
|
||||
goto out;
|
||||
result->op_status = status;
|
||||
|
@ -2331,14 +2360,15 @@ static int nfs3_xdr_dec_commit3res(struct rpc_rqst *req,
|
|||
#ifdef CONFIG_NFS_V3_ACL
|
||||
|
||||
static inline int decode_getacl3resok(struct xdr_stream *xdr,
|
||||
struct nfs3_getaclres *result)
|
||||
struct nfs3_getaclres *result,
|
||||
struct user_namespace *userns)
|
||||
{
|
||||
struct posix_acl **acl;
|
||||
unsigned int *aclcnt;
|
||||
size_t hdrlen;
|
||||
int error;
|
||||
|
||||
error = decode_post_op_attr(xdr, result->fattr);
|
||||
error = decode_post_op_attr(xdr, result->fattr, userns);
|
||||
if (unlikely(error))
|
||||
goto out;
|
||||
error = decode_uint32(xdr, &result->mask);
|
||||
|
@ -2386,7 +2416,7 @@ static int nfs3_xdr_dec_getacl3res(struct rpc_rqst *req,
|
|||
goto out;
|
||||
if (status != NFS3_OK)
|
||||
goto out_default;
|
||||
error = decode_getacl3resok(xdr, result);
|
||||
error = decode_getacl3resok(xdr, result, rpc_rqst_userns(req));
|
||||
out:
|
||||
return error;
|
||||
out_default:
|
||||
|
@ -2405,7 +2435,7 @@ static int nfs3_xdr_dec_setacl3res(struct rpc_rqst *req,
|
|||
goto out;
|
||||
if (status != NFS3_OK)
|
||||
goto out_default;
|
||||
error = decode_post_op_attr(xdr, result);
|
||||
error = decode_post_op_attr(xdr, result, rpc_rqst_userns(req));
|
||||
out:
|
||||
return error;
|
||||
out_default:
|
||||
|
|
Loading…
Reference in New Issue