/*
* Common NFS XDR functions as inlines
*/
-static inline __be32 *
-xdr_decode_fhandle(__be32 *p, struct nfs_fh *fh)
-{
- if ((fh->size = ntohl(*p++)) <= NFS3_FHSIZE) {
- memcpy(fh->data, p, fh->size);
- return p + XDR_QUADLEN(fh->size);
- }
- return NULL;
-}
-
-static inline __be32 *
-xdr_decode_fhandle_stream(struct xdr_stream *xdr, struct nfs_fh *fh)
-{
- __be32 *p;
- p = xdr_inline_decode(xdr, 4);
- if (unlikely(!p))
- goto out_overflow;
- fh->size = ntohl(*p++);
-
- if (fh->size <= NFS3_FHSIZE) {
- p = xdr_inline_decode(xdr, fh->size);
- if (unlikely(!p))
- goto out_overflow;
- memcpy(fh->data, p, fh->size);
- return p + XDR_QUADLEN(fh->size);
- }
- return NULL;
-
-out_overflow:
- print_overflow_msg(__func__, xdr);
- return ERR_PTR(-EIO);
-}
/*
* Encode/decode time.
return p;
}
-static inline __be32 *
-xdr_decode_post_op_attr(__be32 *p, struct nfs_fattr *fattr)
-{
- if (*p++)
- p = xdr_decode_fattr(p, fattr);
- return p;
-}
-
-static inline __be32 *
-xdr_decode_post_op_attr_stream(struct xdr_stream *xdr, struct nfs_fattr *fattr)
-{
- __be32 *p;
-
- p = xdr_inline_decode(xdr, 4);
- if (unlikely(!p))
- goto out_overflow;
- if (ntohl(*p++)) {
- p = xdr_inline_decode(xdr, 84);
- if (unlikely(!p))
- goto out_overflow;
- p = xdr_decode_fattr(p, fattr);
- }
- return p;
-out_overflow:
- print_overflow_msg(__func__, xdr);
- return ERR_PTR(-EIO);
-}
-
-static inline __be32 *
-xdr_decode_pre_op_attr(__be32 *p, struct nfs_fattr *fattr)
-{
- if (*p++)
- return xdr_decode_wcc_attr(p, fattr);
- return p;
-}
-
-
-static inline __be32 *
-xdr_decode_wcc_data(__be32 *p, struct nfs_fattr *fattr)
-{
- p = xdr_decode_pre_op_attr(p, fattr);
- return xdr_decode_post_op_attr(p, fattr);
-}
-
-
/*
* Encode/decode NFSv3 basic data types
*
return 0;
}
-/*
- * Decode the result of a readdir call.
- * We just check for syntactical correctness.
- */
-static int
-nfs3_xdr_readdirres(struct rpc_rqst *req, __be32 *p, struct nfs3_readdirres *res)
-{
- struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
- struct kvec *iov = rcvbuf->head;
- struct page **page;
- size_t hdrlen;
- u32 recvd, pglen;
- int status;
-
- status = ntohl(*p++);
- /* Decode post_op_attrs */
- p = xdr_decode_post_op_attr(p, res->dir_attr);
- if (status)
- return nfs_stat_to_errno(status);
- /* Decode verifier cookie */
- if (res->verf) {
- res->verf[0] = *p++;
- res->verf[1] = *p++;
- } else {
- p += 2;
- }
-
- hdrlen = (u8 *) p - (u8 *) iov->iov_base;
- if (iov->iov_len < hdrlen) {
- dprintk("NFS: READDIR reply header overflowed:"
- "length %Zu > %Zu\n", hdrlen, iov->iov_len);
- return -errno_NFSERR_IO;
- } else if (iov->iov_len != hdrlen) {
- dprintk("NFS: READDIR header is short. iovec will be shifted.\n");
- xdr_shift_buf(rcvbuf, iov->iov_len - hdrlen);
- }
-
- pglen = rcvbuf->page_len;
- recvd = rcvbuf->len - hdrlen;
- if (pglen > recvd)
- pglen = recvd;
- page = rcvbuf->pages;
-
- return pglen;
-}
-
/*
* 3.3.21 COMMIT3args
*
#endif /* CONFIG_NFS_V3_ACL */
/*
- * NFS XDR decode functions
- */
-
-/*
- * Decode attrstat reply.
+ * NFSv3 XDR decode functions
+ *
+ * NFSv3 result types are defined in section 3.3 of RFC 1813:
+ * "NFS Version 3 Protocol Specification".
*/
-static int
-nfs3_xdr_attrstat(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr)
-{
- int status;
-
- if ((status = ntohl(*p++)))
- return nfs_stat_to_errno(status);
- xdr_decode_fattr(p, fattr);
- return 0;
-}
/*
* 3.3.1 GETATTR3res
return nfs_stat_to_errno(status);
}
-/*
- * Decode status+wcc_data reply
- * SATTR, REMOVE, RMDIR
- */
-static int
-nfs3_xdr_wccstat(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr)
-{
- int status;
-
- if ((status = ntohl(*p++)))
- status = nfs_stat_to_errno(status);
- xdr_decode_wcc_data(p, fattr);
- return status;
-}
-
/*
* 3.3.2 SETATTR3res
*
return nfs_stat_to_errno(status);
}
-static int
-nfs3_xdr_removeres(struct rpc_rqst *req, __be32 *p, struct nfs_removeres *res)
-{
- return nfs3_xdr_wccstat(req, p, res->dir_attr);
-}
-
-/*
- * Decode LOOKUP reply
- */
-static int
-nfs3_xdr_lookupres(struct rpc_rqst *req, __be32 *p, struct nfs3_diropres *res)
-{
- int status;
-
- if ((status = ntohl(*p++))) {
- status = nfs_stat_to_errno(status);
- } else {
- if (!(p = xdr_decode_fhandle(p, res->fh)))
- return -errno_NFSERR_IO;
- p = xdr_decode_post_op_attr(p, res->fattr);
- }
- xdr_decode_post_op_attr(p, res->dir_attr);
- return status;
-}
-
/*
* 3.3.3 LOOKUP3res
*
return nfs_stat_to_errno(status);
}
-/*
- * Decode ACCESS reply
- */
-static int
-nfs3_xdr_accessres(struct rpc_rqst *req, __be32 *p, struct nfs3_accessres *res)
-{
- int status = ntohl(*p++);
-
- p = xdr_decode_post_op_attr(p, res->fattr);
- if (status)
- return nfs_stat_to_errno(status);
- res->access = ntohl(*p++);
- return 0;
-}
-
/*
* 3.3.4 ACCESS3res
*
return nfs_stat_to_errno(status);
}
-/*
- * Decode READLINK reply
- */
-static int
-nfs3_xdr_readlinkres(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr)
-{
- struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
- struct kvec *iov = rcvbuf->head;
- size_t hdrlen;
- u32 len, recvd;
- int status;
-
- status = ntohl(*p++);
- p = xdr_decode_post_op_attr(p, fattr);
-
- if (status != 0)
- return nfs_stat_to_errno(status);
-
- /* Convert length of symlink */
- len = ntohl(*p++);
- if (len >= rcvbuf->page_len) {
- dprintk("nfs: server returned giant symlink!\n");
- return -ENAMETOOLONG;
- }
-
- hdrlen = (u8 *) p - (u8 *) iov->iov_base;
- if (iov->iov_len < hdrlen) {
- dprintk("NFS: READLINK reply header overflowed:"
- "length %Zu > %Zu\n", hdrlen, iov->iov_len);
- return -errno_NFSERR_IO;
- } else if (iov->iov_len != hdrlen) {
- dprintk("NFS: READLINK header is short. "
- "iovec will be shifted.\n");
- xdr_shift_buf(rcvbuf, iov->iov_len - hdrlen);
- }
- recvd = req->rq_rcv_buf.len - hdrlen;
- if (recvd < len) {
- dprintk("NFS: server cheating in readlink reply: "
- "count %u > recvd %u\n", len, recvd);
- return -EIO;
- }
-
- xdr_terminate_string(rcvbuf, len);
- return 0;
-}
-
/*
* 3.3.5 READLINK3res
*
return nfs_stat_to_errno(status);
}
-/*
- * Decode READ reply
- */
-static int
-nfs3_xdr_readres(struct rpc_rqst *req, __be32 *p, struct nfs_readres *res)
-{
- struct kvec *iov = req->rq_rcv_buf.head;
- size_t hdrlen;
- u32 count, ocount, recvd;
- int status;
-
- status = ntohl(*p++);
- p = xdr_decode_post_op_attr(p, res->fattr);
-
- if (status != 0)
- return nfs_stat_to_errno(status);
-
- /* Decode reply count and EOF flag. NFSv3 is somewhat redundant
- * in that it puts the count both in the res struct and in the
- * opaque data count. */
- count = ntohl(*p++);
- res->eof = ntohl(*p++);
- ocount = ntohl(*p++);
-
- if (ocount != count) {
- dprintk("NFS: READ count doesn't match RPC opaque count.\n");
- return -errno_NFSERR_IO;
- }
-
- hdrlen = (u8 *) p - (u8 *) iov->iov_base;
- if (iov->iov_len < hdrlen) {
- dprintk("NFS: READ reply header overflowed:"
- "length %Zu > %Zu\n", hdrlen, iov->iov_len);
- return -errno_NFSERR_IO;
- } else if (iov->iov_len != hdrlen) {
- dprintk("NFS: READ header is short. iovec will be shifted.\n");
- xdr_shift_buf(&req->rq_rcv_buf, iov->iov_len - hdrlen);
- }
-
- recvd = req->rq_rcv_buf.len - hdrlen;
- if (count > recvd) {
- dprintk("NFS: server cheating in read reply: "
- "count %u > recvd %u\n", count, recvd);
- count = recvd;
- res->eof = 0;
- }
-
- if (count < res->count)
- res->count = count;
-
- return count;
-}
-
/*
* 3.3.6 READ3res
*
return nfs_stat_to_errno(status);
}
-/*
- * Decode WRITE response
- */
-static int
-nfs3_xdr_writeres(struct rpc_rqst *req, __be32 *p, struct nfs_writeres *res)
-{
- int status;
-
- status = ntohl(*p++);
- p = xdr_decode_wcc_data(p, res->fattr);
-
- if (status != 0)
- return nfs_stat_to_errno(status);
-
- res->count = ntohl(*p++);
- res->verf->committed = (enum nfs3_stable_how)ntohl(*p++);
- res->verf->verifier[0] = *p++;
- res->verf->verifier[1] = *p++;
-
- return res->count;
-}
-
/*
* 3.3.7 WRITE3res
*
return nfs_stat_to_errno(status);
}
-/*
- * Decode a CREATE response
- */
-static int
-nfs3_xdr_createres(struct rpc_rqst *req, __be32 *p, struct nfs3_diropres *res)
-{
- int status;
-
- status = ntohl(*p++);
- if (status == 0) {
- if (*p++) {
- if (!(p = xdr_decode_fhandle(p, res->fh)))
- return -errno_NFSERR_IO;
- p = xdr_decode_post_op_attr(p, res->fattr);
- } else {
- memset(res->fh, 0, sizeof(*res->fh));
- /* Do decode post_op_attr but set it to NULL */
- p = xdr_decode_post_op_attr(p, res->fattr);
- res->fattr->valid = 0;
- }
- } else {
- status = nfs_stat_to_errno(status);
- }
- p = xdr_decode_wcc_data(p, res->dir_attr);
- return status;
-}
-
/*
* 3.3.8 CREATE3res
*
return nfs_stat_to_errno(status);
}
-/*
- * Decode RENAME reply
- */
-static int
-nfs3_xdr_renameres(struct rpc_rqst *req, __be32 *p, struct nfs_renameres *res)
-{
- int status;
-
- if ((status = ntohl(*p++)) != 0)
- status = nfs_stat_to_errno(status);
- p = xdr_decode_wcc_data(p, res->old_fattr);
- p = xdr_decode_wcc_data(p, res->new_fattr);
- return status;
-}
-
/*
* 3.3.14 RENAME3res
*
return nfs_stat_to_errno(status);
}
-/*
- * Decode LINK reply
- */
-static int
-nfs3_xdr_linkres(struct rpc_rqst *req, __be32 *p, struct nfs3_linkres *res)
-{
- int status;
-
- if ((status = ntohl(*p++)) != 0)
- status = nfs_stat_to_errno(status);
- p = xdr_decode_post_op_attr(p, res->fattr);
- p = xdr_decode_wcc_data(p, res->dir_attr);
- return status;
-}
-
/*
* 3.3.15 LINK3res
*
return nfs_stat_to_errno(status);
}
-/*
- * Decode FSSTAT reply
- */
-static int
-nfs3_xdr_fsstatres(struct rpc_rqst *req, __be32 *p, struct nfs_fsstat *res)
-{
- int status;
-
- status = ntohl(*p++);
-
- p = xdr_decode_post_op_attr(p, res->fattr);
- if (status != 0)
- return nfs_stat_to_errno(status);
-
- p = xdr_decode_hyper(p, &res->tbytes);
- p = xdr_decode_hyper(p, &res->fbytes);
- p = xdr_decode_hyper(p, &res->abytes);
- p = xdr_decode_hyper(p, &res->tfiles);
- p = xdr_decode_hyper(p, &res->ffiles);
- p = xdr_decode_hyper(p, &res->afiles);
-
- /* ignore invarsec */
- return 0;
-}
-
/*
* 3.3.18 FSSTAT3res
*
return nfs_stat_to_errno(status);
}
-/*
- * Decode FSINFO reply
- */
-static int
-nfs3_xdr_fsinfores(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *res)
-{
- int status;
-
- status = ntohl(*p++);
-
- p = xdr_decode_post_op_attr(p, res->fattr);
- if (status != 0)
- return nfs_stat_to_errno(status);
-
- res->rtmax = ntohl(*p++);
- res->rtpref = ntohl(*p++);
- res->rtmult = ntohl(*p++);
- res->wtmax = ntohl(*p++);
- res->wtpref = ntohl(*p++);
- res->wtmult = ntohl(*p++);
- res->dtpref = ntohl(*p++);
- p = xdr_decode_hyper(p, &res->maxfilesize);
- p = xdr_decode_time3(p, &res->time_delta);
-
- /* ignore properties */
- res->lease_time = 0;
- return 0;
-}
-
/*
* 3.3.19 FSINFO3res
*
return nfs_stat_to_errno(status);
}
-/*
- * Decode PATHCONF reply
- */
-static int
-nfs3_xdr_pathconfres(struct rpc_rqst *req, __be32 *p, struct nfs_pathconf *res)
-{
- int status;
-
- status = ntohl(*p++);
-
- p = xdr_decode_post_op_attr(p, res->fattr);
- if (status != 0)
- return nfs_stat_to_errno(status);
- res->max_link = ntohl(*p++);
- res->max_namelen = ntohl(*p++);
-
- /* ignore remaining fields */
- return 0;
-}
-
/*
* 3.3.20 PATHCONF3res
*
return nfs_stat_to_errno(status);
}
-/*
- * Decode COMMIT reply
- */
-static int
-nfs3_xdr_commitres(struct rpc_rqst *req, __be32 *p, struct nfs_writeres *res)
-{
- int status;
-
- status = ntohl(*p++);
- p = xdr_decode_wcc_data(p, res->fattr);
- if (status != 0)
- return nfs_stat_to_errno(status);
-
- res->verf->verifier[0] = *p++;
- res->verf->verifier[1] = *p++;
- return 0;
-}
-
/*
* 3.3.21 COMMIT3res
*
}
#ifdef CONFIG_NFS_V3_ACL
-/*
- * Decode GETACL reply
- */
-static int
-nfs3_xdr_getaclres(struct rpc_rqst *req, __be32 *p,
- struct nfs3_getaclres *res)
-{
- struct xdr_buf *buf = &req->rq_rcv_buf;
- int status = ntohl(*p++);
- struct posix_acl **acl;
- unsigned int *aclcnt;
- int err, base;
-
- if (status != 0)
- return nfs_stat_to_errno(status);
- p = xdr_decode_post_op_attr(p, res->fattr);
- res->mask = ntohl(*p++);
- if (res->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT))
- return -EINVAL;
- base = (char *)p - (char *)req->rq_rcv_buf.head->iov_base;
-
- acl = (res->mask & NFS_ACL) ? &res->acl_access : NULL;
- aclcnt = (res->mask & NFS_ACLCNT) ? &res->acl_access_count : NULL;
- err = nfsacl_decode(buf, base, aclcnt, acl);
-
- acl = (res->mask & NFS_DFACL) ? &res->acl_default : NULL;
- aclcnt = (res->mask & NFS_DFACLCNT) ? &res->acl_default_count : NULL;
- if (err > 0)
- err = nfsacl_decode(buf, base + err, aclcnt, acl);
- return (err > 0) ? 0 : err;
-}
static inline int decode_getacl3resok(struct xdr_stream *xdr,
struct nfs3_getaclres *result)
return nfs_stat_to_errno(status);
}
-/*
- * Decode setacl reply.
- */
-static int
-nfs3_xdr_setaclres(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr)
-{
- int status = ntohl(*p++);
-
- if (status)
- return nfs_stat_to_errno(status);
- xdr_decode_post_op_attr(p, fattr);
- return 0;
-}
-
static int nfs3_xdr_dec_setacl3res(struct rpc_rqst *req, __be32 *p,
struct nfs_fattr *result)
{
projects / mirror_ubuntu-hirsute-kernel.git / commitdiff