This is needed in preparation for structured reply handling,
as we will be performing the translation from NBD error to
system errno value higher in the stack at block/nbd-client.c.
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <
20171027104037.8319-3-eblake@redhat.com>
* aren't overflowing some other buffer. */
#define NBD_MAX_NAME_SIZE 256
+/* NBD errors are based on errno numbers, so there is a 1:1 mapping,
+ * but only a limited set of errno values is specified in the protocol.
+ * Everything else is squashed to EINVAL.
+ */
+#define NBD_SUCCESS 0
+#define NBD_EPERM 1
+#define NBD_EIO 5
+#define NBD_ENOMEM 12
+#define NBD_EINVAL 22
+#define NBD_ENOSPC 28
+#define NBD_ESHUTDOWN 108
+
/* Details collected by NBD_OPT_EXPORT_NAME and NBD_OPT_GO */
struct NBDExportInfo {
/* Set by client before nbd_receive_negotiate() */
int nbd_receive_reply(QIOChannel *ioc, NBDReply *reply, Error **errp);
int nbd_client(int fd);
int nbd_disconnect(int fd);
+int nbd_errno_to_system_errno(int err);
typedef struct NBDExport NBDExport;
typedef struct NBDClient NBDClient;
#include "trace.h"
#include "nbd-internal.h"
-static 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_ESHUTDOWN:
- ret = ESHUTDOWN;
- break;
- default:
- trace_nbd_unknown_error(err);
- /* fallthrough */
- case NBD_EINVAL:
- ret = EINVAL;
- break;
- }
- return ret;
-}
-
/* Definitions for opaque data types */
static QTAILQ_HEAD(, NBDExport) exports = QTAILQ_HEAD_INITIALIZER(exports);
#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
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_ESHUTDOWN:
+ ret = ESHUTDOWN;
+ break;
+ default:
+ trace_nbd_unknown_error(err);
+ /* fallthrough */
+ case NBD_EINVAL:
+ ret = EINVAL;
+ break;
+ }
+ return ret;
+}
#define NBD_SET_TIMEOUT _IO(0xab, 9)
#define NBD_SET_FLAGS _IO(0xab, 10)
-/* NBD errors are based on errno numbers, so there is a 1:1 mapping,
- * but only a limited set of errno values is specified in the protocol.
- * Everything else is squashed to EINVAL.
- */
-#define NBD_SUCCESS 0
-#define NBD_EPERM 1
-#define NBD_EIO 5
-#define NBD_ENOMEM 12
-#define NBD_EINVAL 22
-#define NBD_ENOSPC 28
-#define NBD_ESHUTDOWN 108
-
/* nbd_read_eof
* Tries to read @size bytes from @ioc.
* Returns 1 on success
# nbd/client.c
-nbd_unknown_error(int err) "Squashing unexpected error %d to EINVAL"
nbd_send_option_request(uint32_t opt, const char *name, uint32_t len) "Sending option request %" PRIu32" (%s), len %" PRIu32
nbd_receive_option_reply(uint32_t option, const char *optname, uint32_t type, const char *typename, uint32_t length) "Received option reply 0x%" PRIx32" (%s), type 0x%" PRIx32" (%s), len %" PRIu32
nbd_reply_err_unsup(uint32_t option, const char *name) "server doesn't understand request 0x%" PRIx32 " (%s), attempting fallback"
nbd_send_request(uint64_t from, uint32_t len, uint64_t handle, uint16_t flags, uint16_t type, const char *name) "Sending request to server: { .from = %" PRIu64", .len = %" PRIu32 ", .handle = %" PRIu64 ", .flags = 0x%" PRIx16 ", .type = %" PRIu16 " (%s) }"
nbd_receive_reply(uint32_t magic, int32_t error, const char *errname, uint64_t handle) "Got reply: { magic = 0x%" PRIx32 ", .error = %" PRId32 " (%s), handle = %" PRIu64" }"
+# nbd/common.c
+nbd_unknown_error(int err) "Squashing unexpected error %d to EINVAL"
+
# nbd/server.c
nbd_negotiate_send_rep_len(uint32_t opt, const char *optname, uint32_t type, const char *typename, uint32_t len) "Reply opt=0x%" PRIx32 " (%s), type=0x%" PRIx32 " (%s), len=%" PRIu32
nbd_negotiate_send_rep_err(const char *msg) "sending error message \"%s\""