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NFSv4.2: Clean up: move decode_*xattr() functions
Move them out of the encode_*() section and into the decode_*() section where it belongs. Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com> Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Anna Schumaker
Trond Myklebust
parent
fd42ba8223
commit
04b4c9fb07
@ -464,20 +464,6 @@ static void encode_setxattr(struct xdr_stream *xdr,
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xdr_write_pages(xdr, arg->xattr_pages, 0, arg->xattr_len);
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}
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static int decode_setxattr(struct xdr_stream *xdr,
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struct nfs4_change_info *cinfo)
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{
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int status;
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status = decode_op_hdr(xdr, OP_SETXATTR);
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if (status)
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goto out;
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status = decode_change_info(xdr, cinfo);
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out:
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return status;
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}
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static void encode_getxattr(struct xdr_stream *xdr, const char *name,
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struct compound_hdr *hdr)
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{
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@ -485,43 +471,6 @@ static void encode_getxattr(struct xdr_stream *xdr, const char *name,
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encode_string(xdr, strlen(name), name);
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}
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static int decode_getxattr(struct xdr_stream *xdr,
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struct nfs42_getxattrres *res,
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struct rpc_rqst *req)
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{
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int status;
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__be32 *p;
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u32 len, rdlen;
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status = decode_op_hdr(xdr, OP_GETXATTR);
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if (status)
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return status;
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p = xdr_inline_decode(xdr, 4);
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if (unlikely(!p))
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return -EIO;
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len = be32_to_cpup(p);
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/*
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* Only check against the page length here. The actual
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* requested length may be smaller, but that is only
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* checked against after possibly caching a valid reply.
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*/
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if (len > req->rq_rcv_buf.page_len)
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return -ERANGE;
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res->xattr_len = len;
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if (len > 0) {
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rdlen = xdr_read_pages(xdr, len);
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if (rdlen < len)
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return -EIO;
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}
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return 0;
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}
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static void encode_removexattr(struct xdr_stream *xdr, const char *name,
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struct compound_hdr *hdr)
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{
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@ -529,21 +478,6 @@ static void encode_removexattr(struct xdr_stream *xdr, const char *name,
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encode_string(xdr, strlen(name), name);
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}
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static int decode_removexattr(struct xdr_stream *xdr,
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struct nfs4_change_info *cinfo)
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{
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int status;
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status = decode_op_hdr(xdr, OP_REMOVEXATTR);
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if (status)
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goto out;
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status = decode_change_info(xdr, cinfo);
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out:
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return status;
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}
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static void encode_listxattrs(struct xdr_stream *xdr,
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const struct nfs42_listxattrsargs *arg,
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struct compound_hdr *hdr)
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@ -565,104 +499,6 @@ static void encode_listxattrs(struct xdr_stream *xdr,
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*p = cpu_to_be32(arg->count + 8 + 4);
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}
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static int decode_listxattrs(struct xdr_stream *xdr,
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struct nfs42_listxattrsres *res)
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{
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int status;
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__be32 *p;
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u32 count, len, ulen;
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size_t left, copied;
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char *buf;
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status = decode_op_hdr(xdr, OP_LISTXATTRS);
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if (status) {
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/*
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* Special case: for LISTXATTRS, NFS4ERR_TOOSMALL
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* should be translated to ERANGE.
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*/
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if (status == -ETOOSMALL)
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status = -ERANGE;
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/*
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* Special case: for LISTXATTRS, NFS4ERR_NOXATTR
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* should be translated to success with zero-length reply.
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*/
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if (status == -ENODATA) {
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res->eof = true;
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status = 0;
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}
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goto out;
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}
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p = xdr_inline_decode(xdr, 8);
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if (unlikely(!p))
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return -EIO;
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xdr_decode_hyper(p, &res->cookie);
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p = xdr_inline_decode(xdr, 4);
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if (unlikely(!p))
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return -EIO;
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left = res->xattr_len;
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buf = res->xattr_buf;
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count = be32_to_cpup(p);
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copied = 0;
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/*
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* We have asked for enough room to encode the maximum number
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* of possible attribute names, so everything should fit.
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*
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* But, don't rely on that assumption. Just decode entries
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* until they don't fit anymore, just in case the server did
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* something odd.
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*/
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while (count--) {
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p = xdr_inline_decode(xdr, 4);
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if (unlikely(!p))
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return -EIO;
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len = be32_to_cpup(p);
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if (len > (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) {
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status = -ERANGE;
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goto out;
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}
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p = xdr_inline_decode(xdr, len);
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if (unlikely(!p))
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return -EIO;
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ulen = len + XATTR_USER_PREFIX_LEN + 1;
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if (buf) {
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if (ulen > left) {
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status = -ERANGE;
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goto out;
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}
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memcpy(buf, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
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memcpy(buf + XATTR_USER_PREFIX_LEN, p, len);
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buf[ulen - 1] = 0;
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buf += ulen;
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left -= ulen;
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}
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copied += ulen;
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}
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p = xdr_inline_decode(xdr, 4);
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if (unlikely(!p))
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return -EIO;
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res->eof = be32_to_cpup(p);
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res->copied = copied;
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out:
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if (status == -ERANGE && res->xattr_len == XATTR_LIST_MAX)
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status = -E2BIG;
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return status;
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}
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/*
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* Encode ALLOCATE request
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*/
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@ -1192,6 +1028,168 @@ static int decode_layouterror(struct xdr_stream *xdr)
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return decode_op_hdr(xdr, OP_LAYOUTERROR);
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}
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static int decode_setxattr(struct xdr_stream *xdr,
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struct nfs4_change_info *cinfo)
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{
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int status;
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status = decode_op_hdr(xdr, OP_SETXATTR);
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if (status)
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goto out;
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status = decode_change_info(xdr, cinfo);
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out:
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return status;
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}
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static int decode_getxattr(struct xdr_stream *xdr,
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struct nfs42_getxattrres *res,
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struct rpc_rqst *req)
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{
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int status;
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__be32 *p;
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u32 len, rdlen;
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status = decode_op_hdr(xdr, OP_GETXATTR);
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if (status)
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return status;
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p = xdr_inline_decode(xdr, 4);
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if (unlikely(!p))
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return -EIO;
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len = be32_to_cpup(p);
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/*
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* Only check against the page length here. The actual
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* requested length may be smaller, but that is only
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* checked against after possibly caching a valid reply.
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*/
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if (len > req->rq_rcv_buf.page_len)
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return -ERANGE;
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res->xattr_len = len;
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if (len > 0) {
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rdlen = xdr_read_pages(xdr, len);
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if (rdlen < len)
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return -EIO;
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}
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return 0;
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}
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static int decode_removexattr(struct xdr_stream *xdr,
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struct nfs4_change_info *cinfo)
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{
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int status;
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status = decode_op_hdr(xdr, OP_REMOVEXATTR);
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if (status)
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goto out;
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status = decode_change_info(xdr, cinfo);
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out:
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return status;
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}
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static int decode_listxattrs(struct xdr_stream *xdr,
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struct nfs42_listxattrsres *res)
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{
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int status;
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__be32 *p;
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u32 count, len, ulen;
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size_t left, copied;
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char *buf;
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status = decode_op_hdr(xdr, OP_LISTXATTRS);
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if (status) {
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/*
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* Special case: for LISTXATTRS, NFS4ERR_TOOSMALL
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* should be translated to ERANGE.
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*/
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if (status == -ETOOSMALL)
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status = -ERANGE;
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/*
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* Special case: for LISTXATTRS, NFS4ERR_NOXATTR
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* should be translated to success with zero-length reply.
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*/
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if (status == -ENODATA) {
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res->eof = true;
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status = 0;
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}
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goto out;
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}
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p = xdr_inline_decode(xdr, 8);
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if (unlikely(!p))
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return -EIO;
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xdr_decode_hyper(p, &res->cookie);
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p = xdr_inline_decode(xdr, 4);
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if (unlikely(!p))
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return -EIO;
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left = res->xattr_len;
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buf = res->xattr_buf;
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count = be32_to_cpup(p);
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copied = 0;
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/*
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* We have asked for enough room to encode the maximum number
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* of possible attribute names, so everything should fit.
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*
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* But, don't rely on that assumption. Just decode entries
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* until they don't fit anymore, just in case the server did
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* something odd.
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*/
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while (count--) {
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p = xdr_inline_decode(xdr, 4);
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if (unlikely(!p))
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return -EIO;
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len = be32_to_cpup(p);
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if (len > (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) {
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status = -ERANGE;
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goto out;
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}
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p = xdr_inline_decode(xdr, len);
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if (unlikely(!p))
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return -EIO;
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ulen = len + XATTR_USER_PREFIX_LEN + 1;
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if (buf) {
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if (ulen > left) {
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status = -ERANGE;
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goto out;
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}
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memcpy(buf, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
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memcpy(buf + XATTR_USER_PREFIX_LEN, p, len);
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buf[ulen - 1] = 0;
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buf += ulen;
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left -= ulen;
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}
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copied += ulen;
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}
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p = xdr_inline_decode(xdr, 4);
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if (unlikely(!p))
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return -EIO;
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res->eof = be32_to_cpup(p);
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res->copied = copied;
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out:
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if (status == -ERANGE && res->xattr_len == XATTR_LIST_MAX)
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status = -E2BIG;
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return status;
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}
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/*
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* Decode ALLOCATE request
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*/
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