migration/postcopy: mis->have_listen_thread check will never be touched

[mirror_qemu.git] / nbd / common.c

diff --git a/nbd/common.c b/nbd/common.c
index 59a5316be94115489db9b2ec2e43b47b379646b1..ddfe7d118371f8d24f8ad1431aa769314751864d 100644 (file)
--- a/nbd/common.c
+++ b/nbd/common.c
@@ -17,7 +17,7 @@
  */
 
 #include "qemu/osdep.h"
-#include "qapi/error.h"
+#include "trace.h"
 #include "nbd-internal.h"
 
 /* Discard length bytes from channel.  Return -errno on failure and 0 on
@@ -31,7 +31,7 @@ int nbd_drop(QIOChannel *ioc, size_t size, Error **errp)
     buffer = sizeof(small) >= size ? small : g_malloc(MIN(65536, size));
     while (size > 0) {
         ssize_t count = MIN(65536, size);
-        ret = nbd_read(ioc, buffer, MIN(65536, size), errp);
+        ret = nbd_read(ioc, buffer, MIN(65536, size), NULL, errp);
 
         if (ret < 0) {
             goto cleanup;
@@ -75,6 +75,10 @@ const char *nbd_opt_lookup(uint32_t opt)
         return "go";
     case NBD_OPT_STRUCTURED_REPLY:
         return "structured reply";
+    case NBD_OPT_LIST_META_CONTEXT:
+        return "list meta context";
+    case NBD_OPT_SET_META_CONTEXT:
+        return "set meta context";
     default:
         return "<unknown>";
     }
@@ -90,6 +94,8 @@ const char *nbd_rep_lookup(uint32_t rep)
         return "server";
     case NBD_REP_INFO:
         return "info";
+    case NBD_REP_META_CONTEXT:
+        return "meta context";
     case NBD_REP_ERR_UNSUP:
         return "unsupported";
     case NBD_REP_ERR_POLICY:
@@ -142,9 +148,103 @@ const char *nbd_cmd_lookup(uint16_t cmd)
         return "flush";
     case NBD_CMD_TRIM:
         return "trim";
+    case NBD_CMD_CACHE:
+        return "cache";
     case NBD_CMD_WRITE_ZEROES:
         return "write zeroes";
+    case NBD_CMD_BLOCK_STATUS:
+        return "block status";
     default:
         return "<unknown>";
     }
 }
+
+
+const char *nbd_reply_type_lookup(uint16_t type)
+{
+    switch (type) {
+    case NBD_REPLY_TYPE_NONE:
+        return "none";
+    case NBD_REPLY_TYPE_OFFSET_DATA:
+        return "data";
+    case NBD_REPLY_TYPE_OFFSET_HOLE:
+        return "hole";
+    case NBD_REPLY_TYPE_BLOCK_STATUS:
+        return "block status";
+    case NBD_REPLY_TYPE_ERROR:
+        return "generic error";
+    case NBD_REPLY_TYPE_ERROR_OFFSET:
+        return "error at offset";
+    default:
+        if (type & (1 << 15)) {
+            return "<unknown error>";
+        }
+        return "<unknown>";
+    }
+}
+
+
+const char *nbd_err_lookup(int err)
+{
+    switch (err) {
+    case NBD_SUCCESS:
+        return "success";
+    case NBD_EPERM:
+        return "EPERM";
+    case NBD_EIO:
+        return "EIO";
+    case NBD_ENOMEM:
+        return "ENOMEM";
+    case NBD_EINVAL:
+        return "EINVAL";
+    case NBD_ENOSPC:
+        return "ENOSPC";
+    case NBD_EOVERFLOW:
+        return "EOVERFLOW";
+    case NBD_ENOTSUP:
+        return "ENOTSUP";
+    case NBD_ESHUTDOWN:
+        return "ESHUTDOWN";
+    default:
+        return "<unknown>";
+    }
+}
+
+
+int nbd_errno_to_system_errno(int err)
+{
+    int ret;
+    switch (err) {
+    case NBD_SUCCESS:
+        ret = 0;
+        break;
+    case NBD_EPERM:
+        ret = EPERM;
+        break;
+    case NBD_EIO:
+        ret = EIO;
+        break;
+    case NBD_ENOMEM:
+        ret = ENOMEM;
+        break;
+    case NBD_ENOSPC:
+        ret = ENOSPC;
+        break;
+    case NBD_EOVERFLOW:
+        ret = EOVERFLOW;
+        break;
+    case NBD_ENOTSUP:
+        ret = ENOTSUP;
+        break;
+    case NBD_ESHUTDOWN:
+        ret = ESHUTDOWN;
+        break;
+    default:
+        trace_nbd_unknown_error(err);
+        /* fallthrough */
+    case NBD_EINVAL:
+        ret = EINVAL;
+        break;
+    }
+    return ret;
+}