4 * Network Block Device Common Code
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; under version 2 of the License.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, see <http://www.gnu.org/licenses/>.
19 #include "qemu/osdep.h"
20 #include "qapi/error.h"
22 #include "nbd-internal.h"
24 /* Discard length bytes from channel. Return -errno on failure and 0 on
26 int nbd_drop(QIOChannel *ioc, size_t size, Error **errp)
32 buffer = sizeof(small) >= size ? small : g_malloc(MIN(65536, size));
34 ssize_t count = MIN(65536, size);
35 ret = nbd_read(ioc, buffer, MIN(65536, size), errp);
44 if (buffer != small) {
51 void nbd_tls_handshake(QIOTask *task,
54 struct NBDTLSHandshakeData *data = opaque;
56 qio_task_propagate_error(task, &data->error);
57 data->complete = true;
58 g_main_loop_quit(data->loop);
62 const char *nbd_opt_lookup(uint32_t opt)
65 case NBD_OPT_EXPORT_NAME:
71 case NBD_OPT_STARTTLS:
77 case NBD_OPT_STRUCTURED_REPLY:
78 return "structured reply";
85 const char *nbd_rep_lookup(uint32_t rep)
94 case NBD_REP_ERR_UNSUP:
96 case NBD_REP_ERR_POLICY:
97 return "denied by policy";
98 case NBD_REP_ERR_INVALID:
100 case NBD_REP_ERR_PLATFORM:
101 return "platform lacks support";
102 case NBD_REP_ERR_TLS_REQD:
103 return "TLS required";
104 case NBD_REP_ERR_UNKNOWN:
105 return "export unknown";
106 case NBD_REP_ERR_SHUTDOWN:
107 return "server shutting down";
108 case NBD_REP_ERR_BLOCK_SIZE_REQD:
109 return "block size required";
116 const char *nbd_info_lookup(uint16_t info)
119 case NBD_INFO_EXPORT:
123 case NBD_INFO_DESCRIPTION:
124 return "description";
125 case NBD_INFO_BLOCK_SIZE:
133 const char *nbd_cmd_lookup(uint16_t cmd)
146 case NBD_CMD_WRITE_ZEROES:
147 return "write zeroes";
154 const char *nbd_reply_type_lookup(uint16_t type)
157 case NBD_REPLY_TYPE_NONE:
159 case NBD_REPLY_TYPE_OFFSET_DATA:
161 case NBD_REPLY_TYPE_OFFSET_HOLE:
163 case NBD_REPLY_TYPE_ERROR:
164 return "generic error";
165 case NBD_REPLY_TYPE_ERROR_OFFSET:
166 return "error at offset";
168 if (type & (1 << 15)) {
169 return "<unknown error>";
176 const char *nbd_err_lookup(int err)
201 int nbd_errno_to_system_errno(int err)
227 trace_nbd_unknown_error(err);