+/*
+ * nfsstat4
+ */
+static const struct {
+ int stat;
+ int errno;
+} nfs_cb_errtbl[] = {
+ { NFS4_OK, 0 },
+ { NFS4ERR_PERM, -EPERM },
+ { NFS4ERR_NOENT, -ENOENT },
+ { NFS4ERR_IO, -EIO },
+ { NFS4ERR_NXIO, -ENXIO },
+ { NFS4ERR_ACCESS, -EACCES },
+ { NFS4ERR_EXIST, -EEXIST },
+ { NFS4ERR_XDEV, -EXDEV },
+ { NFS4ERR_NOTDIR, -ENOTDIR },
+ { NFS4ERR_ISDIR, -EISDIR },
+ { NFS4ERR_INVAL, -EINVAL },
+ { NFS4ERR_FBIG, -EFBIG },
+ { NFS4ERR_NOSPC, -ENOSPC },
+ { NFS4ERR_ROFS, -EROFS },
+ { NFS4ERR_MLINK, -EMLINK },
+ { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG },
+ { NFS4ERR_NOTEMPTY, -ENOTEMPTY },
+ { NFS4ERR_DQUOT, -EDQUOT },
+ { NFS4ERR_STALE, -ESTALE },
+ { NFS4ERR_BADHANDLE, -EBADHANDLE },
+ { NFS4ERR_BAD_COOKIE, -EBADCOOKIE },
+ { NFS4ERR_NOTSUPP, -ENOTSUPP },
+ { NFS4ERR_TOOSMALL, -ETOOSMALL },
+ { NFS4ERR_SERVERFAULT, -ESERVERFAULT },
+ { NFS4ERR_BADTYPE, -EBADTYPE },
+ { NFS4ERR_LOCKED, -EAGAIN },
+ { NFS4ERR_RESOURCE, -EREMOTEIO },
+ { NFS4ERR_SYMLINK, -ELOOP },
+ { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
+ { NFS4ERR_DEADLOCK, -EDEADLK },
+ { -1, -EIO }
+};
+
+/*
+ * If we cannot translate the error, the recovery routines should
+ * handle it.
+ *
+ * Note: remaining NFSv4 error codes have values > 10000, so should
+ * not conflict with native Linux error codes.
+ */
+static int nfs_cb_stat_to_errno(int status)
+{
+ int i;
+
+ for (i = 0; nfs_cb_errtbl[i].stat != -1; i++) {
+ if (nfs_cb_errtbl[i].stat == status)
+ return nfs_cb_errtbl[i].errno;
+ }
+
+ dprintk("NFSD: Unrecognized NFS CB status value: %u\n", status);
+ return -status;
+}
+
+static int decode_cb_op_status(struct xdr_stream *xdr, enum nfs_opnum4 expected,
+ enum nfsstat4 *status)
+{
+ __be32 *p;
+ u32 op;
+
+ p = xdr_inline_decode(xdr, 4 + 4);
+ if (unlikely(p == NULL))
+ goto out_overflow;
+ op = be32_to_cpup(p++);
+ if (unlikely(op != expected))
+ goto out_unexpected;
+ *status = be32_to_cpup(p);
+ return 0;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+out_unexpected:
+ dprintk("NFSD: Callback server returned operation %d but "
+ "we issued a request for %d\n", op, expected);
+ return -EIO;
+}
+