}
/*
- * Decode PATHCONF reply
+ * 3.3.12 REMOVE3res
+ *
+ * struct REMOVE3resok {
+ * wcc_data dir_wcc;
+ * };
+ *
+ * struct REMOVE3resfail {
+ * wcc_data dir_wcc;
+ * };
+ *
+ * union REMOVE3res switch (nfsstat3 status) {
+ * case NFS3_OK:
+ * REMOVE3resok resok;
+ * default:
+ * REMOVE3resfail resfail;
+ * };
*/
-static int
-nfs3_xdr_pathconfres(struct rpc_rqst *req, __be32 *p, struct nfs_pathconf *res)
+static int nfs3_xdr_dec_remove3res(struct rpc_rqst *req,
+ struct xdr_stream *xdr,
+ struct nfs_removeres *result)
{
- int status;
+ enum nfs_stat status;
+ int error;
+
+ error = decode_nfsstat3(xdr, &status);
+ if (unlikely(error))
+ goto out;
+ error = decode_wcc_data(xdr, result->dir_attr);
+ if (unlikely(error))
+ goto out;
+ if (status != NFS3_OK)
+ goto out_status;
+out:
+ return error;
+out_status:
+ return nfs_stat_to_errno(status);
+}
- status = ntohl(*p++);
+/*
+ * 3.3.14 RENAME3res
+ *
+ * struct RENAME3resok {
+ * wcc_data fromdir_wcc;
+ * wcc_data todir_wcc;
+ * };
+ *
+ * struct RENAME3resfail {
+ * wcc_data fromdir_wcc;
+ * wcc_data todir_wcc;
+ * };
+ *
+ * union RENAME3res switch (nfsstat3 status) {
+ * case NFS3_OK:
+ * RENAME3resok resok;
+ * default:
+ * RENAME3resfail resfail;
+ * };
+ */
+static int nfs3_xdr_dec_rename3res(struct rpc_rqst *req,
+ struct xdr_stream *xdr,
+ struct nfs_renameres *result)
+{
+ enum nfs_stat status;
+ int error;
+
+ error = decode_nfsstat3(xdr, &status);
+ if (unlikely(error))
+ goto out;
+ error = decode_wcc_data(xdr, result->old_fattr);
+ if (unlikely(error))
+ goto out;
+ error = decode_wcc_data(xdr, result->new_fattr);
+ if (unlikely(error))
+ goto out;
+ if (status != NFS3_OK)
+ goto out_status;
+out:
+ return error;
+out_status:
+ return nfs_stat_to_errno(status);
+}
- 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++);
+/*
+ * 3.3.15 LINK3res
+ *
+ * struct LINK3resok {
+ * post_op_attr file_attributes;
+ * wcc_data linkdir_wcc;
+ * };
+ *
+ * struct LINK3resfail {
+ * post_op_attr file_attributes;
+ * wcc_data linkdir_wcc;
+ * };
+ *
+ * union LINK3res switch (nfsstat3 status) {
+ * case NFS3_OK:
+ * LINK3resok resok;
+ * default:
+ * LINK3resfail resfail;
+ * };
+ */
+static int nfs3_xdr_dec_link3res(struct rpc_rqst *req, struct xdr_stream *xdr,
+ struct nfs3_linkres *result)
+{
+ enum nfs_stat status;
+ int error;
+
+ error = decode_nfsstat3(xdr, &status);
+ if (unlikely(error))
+ goto out;
+ error = decode_post_op_attr(xdr, result->fattr);
+ if (unlikely(error))
+ goto out;
+ error = decode_wcc_data(xdr, result->dir_attr);
+ if (unlikely(error))
+ goto out;
+ if (status != NFS3_OK)
+ goto out_status;
+out:
+ return error;
+out_status:
+ return nfs_stat_to_errno(status);
+}
+
+/**
+ * nfs3_decode_dirent - Decode a single NFSv3 directory entry stored in
+ * the local page cache
+ * @xdr: XDR stream where entry resides
+ * @entry: buffer to fill in with entry data
+ * @plus: boolean indicating whether this should be a readdirplus entry
+ *
+ * Returns zero if successful, otherwise a negative errno value is
+ * returned.
+ *
+ * This function is not invoked during READDIR reply decoding, but
+ * rather whenever an application invokes the getdents(2) system call
+ * on a directory already in our cache.
+ *
+ * 3.3.16 entry3
+ *
+ * struct entry3 {
+ * fileid3 fileid;
+ * filename3 name;
+ * cookie3 cookie;
+ * fhandle3 filehandle;
+ * post_op_attr3 attributes;
+ * entry3 *nextentry;
+ * };
+ *
+ * 3.3.17 entryplus3
+ * struct entryplus3 {
+ * fileid3 fileid;
+ * filename3 name;
+ * cookie3 cookie;
+ * post_op_attr name_attributes;
+ * post_op_fh3 name_handle;
+ * entryplus3 *nextentry;
+ * };
+ */
+int nfs3_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
+ int plus)
+{
+ struct nfs_entry old = *entry;
+ __be32 *p;
+ int error;
+
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(p == NULL))
+ goto out_overflow;
+ if (*p == xdr_zero) {
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(p == NULL))
+ goto out_overflow;
+ if (*p == xdr_zero)
+ return -EAGAIN;
+ entry->eof = 1;
+ return -EBADCOOKIE;
+ }
+
+ error = decode_fileid3(xdr, &entry->ino);
+ if (unlikely(error))
+ return error;
+
+ error = decode_inline_filename3(xdr, &entry->name, &entry->len);
+ if (unlikely(error))
+ return error;
+
+ entry->prev_cookie = entry->cookie;
+ error = decode_cookie3(xdr, &entry->cookie);
+ if (unlikely(error))
+ return error;
+
+ entry->d_type = DT_UNKNOWN;
+
+ if (plus) {
+ entry->fattr->valid = 0;
+ error = decode_post_op_attr(xdr, entry->fattr);
+ if (unlikely(error))
+ return error;
+ if (entry->fattr->valid & NFS_ATTR_FATTR_V3)
+ entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
+
+ /* In fact, a post_op_fh3: */
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(p == NULL))
+ goto out_overflow;
+ if (*p != xdr_zero) {
+ error = decode_nfs_fh3(xdr, entry->fh);
+ if (unlikely(error)) {
+ if (error == -E2BIG)
+ goto out_truncated;
+ return error;
+ }
+ } else
+ zero_nfs_fh3(entry->fh);
+ }
- /* Peek at the next entry to see if we're at EOD */
- p = xdr_inline_peek(xdr, 4 + 4);
- entry->eof = 0;
- if (p != NULL)
- entry->eof = (p[0] == xdr_zero) && (p[1] != xdr_zero);
- /* ignore remaining fields */
return 0;
+
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EAGAIN;
+out_truncated:
+ dprintk("NFS: directory entry contains invalid file handle\n");
+ *entry = old;
+ return -EAGAIN;
}
/*
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff