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798bfe00 FZ |
1 | /* |
2 | * Copyright (C) 2005 Anthony Liguori <anthony@codemonkey.ws> | |
3 | * | |
4 | * Network Block Device Common Code | |
5 | * | |
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. | |
9 | * | |
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. | |
14 | * | |
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/>. | |
17 | */ | |
18 | ||
d38ea87a | 19 | #include "qemu/osdep.h" |
da34e65c | 20 | #include "qapi/error.h" |
798bfe00 FZ |
21 | #include "nbd-internal.h" |
22 | ||
44298024 VSO |
23 | /* Discard length bytes from channel. Return -errno on failure and 0 on |
24 | * success */ | |
25 | int nbd_drop(QIOChannel *ioc, size_t size, Error **errp) | |
26 | { | |
27 | ssize_t ret = 0; | |
28 | char small[1024]; | |
29 | char *buffer; | |
30 | ||
31 | buffer = sizeof(small) >= size ? small : g_malloc(MIN(65536, size)); | |
32 | while (size > 0) { | |
33 | ssize_t count = MIN(65536, size); | |
34 | ret = nbd_read(ioc, buffer, MIN(65536, size), errp); | |
35 | ||
36 | if (ret < 0) { | |
37 | goto cleanup; | |
38 | } | |
39 | size -= count; | |
40 | } | |
41 | ||
42 | cleanup: | |
43 | if (buffer != small) { | |
44 | g_free(buffer); | |
45 | } | |
46 | return ret; | |
47 | } | |
48 | ||
f95910fe | 49 | |
60e705c5 | 50 | void nbd_tls_handshake(QIOTask *task, |
f95910fe DB |
51 | void *opaque) |
52 | { | |
53 | struct NBDTLSHandshakeData *data = opaque; | |
54 | ||
3e6bb543 | 55 | qio_task_propagate_error(task, &data->error); |
f95910fe DB |
56 | data->complete = true; |
57 | g_main_loop_quit(data->loop); | |
58 | } | |
3736cc5b EB |
59 | |
60 | ||
61 | const char *nbd_opt_lookup(uint32_t opt) | |
62 | { | |
63 | switch (opt) { | |
64 | case NBD_OPT_EXPORT_NAME: | |
65 | return "export name"; | |
66 | case NBD_OPT_ABORT: | |
67 | return "abort"; | |
68 | case NBD_OPT_LIST: | |
69 | return "list"; | |
70 | case NBD_OPT_STARTTLS: | |
71 | return "starttls"; | |
72 | case NBD_OPT_INFO: | |
73 | return "info"; | |
74 | case NBD_OPT_GO: | |
75 | return "go"; | |
76 | case NBD_OPT_STRUCTURED_REPLY: | |
77 | return "structured reply"; | |
78 | default: | |
79 | return "<unknown>"; | |
80 | } | |
81 | } | |
82 | ||
83 | ||
84 | const char *nbd_rep_lookup(uint32_t rep) | |
85 | { | |
86 | switch (rep) { | |
87 | case NBD_REP_ACK: | |
88 | return "ack"; | |
89 | case NBD_REP_SERVER: | |
90 | return "server"; | |
91 | case NBD_REP_INFO: | |
92 | return "info"; | |
93 | case NBD_REP_ERR_UNSUP: | |
94 | return "unsupported"; | |
95 | case NBD_REP_ERR_POLICY: | |
96 | return "denied by policy"; | |
97 | case NBD_REP_ERR_INVALID: | |
98 | return "invalid"; | |
99 | case NBD_REP_ERR_PLATFORM: | |
100 | return "platform lacks support"; | |
101 | case NBD_REP_ERR_TLS_REQD: | |
102 | return "TLS required"; | |
103 | case NBD_REP_ERR_UNKNOWN: | |
104 | return "export unknown"; | |
105 | case NBD_REP_ERR_SHUTDOWN: | |
106 | return "server shutting down"; | |
107 | case NBD_REP_ERR_BLOCK_SIZE_REQD: | |
108 | return "block size required"; | |
109 | default: | |
110 | return "<unknown>"; | |
111 | } | |
112 | } | |
113 | ||
114 | ||
115 | const char *nbd_info_lookup(uint16_t info) | |
116 | { | |
117 | switch (info) { | |
118 | case NBD_INFO_EXPORT: | |
119 | return "export"; | |
120 | case NBD_INFO_NAME: | |
121 | return "name"; | |
122 | case NBD_INFO_DESCRIPTION: | |
123 | return "description"; | |
124 | case NBD_INFO_BLOCK_SIZE: | |
125 | return "block size"; | |
126 | default: | |
127 | return "<unknown>"; | |
128 | } | |
129 | } | |
130 | ||
131 | ||
132 | const char *nbd_cmd_lookup(uint16_t cmd) | |
133 | { | |
134 | switch (cmd) { | |
135 | case NBD_CMD_READ: | |
136 | return "read"; | |
137 | case NBD_CMD_WRITE: | |
138 | return "write"; | |
139 | case NBD_CMD_DISC: | |
dad3946e | 140 | return "disconnect"; |
3736cc5b EB |
141 | case NBD_CMD_FLUSH: |
142 | return "flush"; | |
143 | case NBD_CMD_TRIM: | |
144 | return "trim"; | |
145 | case NBD_CMD_WRITE_ZEROES: | |
146 | return "write zeroes"; | |
147 | default: | |
148 | return "<unknown>"; | |
149 | } | |
150 | } | |
e7a78d0e EB |
151 | |
152 | ||
153 | const char *nbd_err_lookup(int err) | |
154 | { | |
155 | switch (err) { | |
156 | case NBD_SUCCESS: | |
157 | return "success"; | |
158 | case NBD_EPERM: | |
159 | return "EPERM"; | |
160 | case NBD_EIO: | |
161 | return "EIO"; | |
162 | case NBD_ENOMEM: | |
163 | return "ENOMEM"; | |
164 | case NBD_EINVAL: | |
165 | return "EINVAL"; | |
166 | case NBD_ENOSPC: | |
167 | return "ENOSPC"; | |
168 | case NBD_ESHUTDOWN: | |
169 | return "ESHUTDOWN"; | |
170 | default: | |
171 | return "<unknown>"; | |
172 | } | |
173 | } |