2 * Secure Shell (ssh) backend for QEMU.
4 * Copyright (C) 2013 Red Hat Inc., Richard W.M. Jones <rjones@redhat.com>
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
30 #include <libssh2_sftp.h>
32 #include "block/block_int.h"
33 #include "qemu/sockets.h"
35 #include "qapi/qmp/qint.h"
37 /* DEBUG_SSH=1 enables the DPRINTF (debugging printf) statements in
38 * this block driver code.
40 * TRACE_LIBSSH2=<bitmask> enables tracing in libssh2 itself. Note
41 * that this requires that libssh2 was specially compiled with the
42 * `./configure --enable-debug' option, so most likely you will have
43 * to compile it yourself. The meaning of <bitmask> is described
44 * here: http://www.libssh2.org/libssh2_trace.html
47 #define TRACE_LIBSSH2 0 /* or try: LIBSSH2_TRACE_SFTP */
49 #define DPRINTF(fmt, ...) \
52 fprintf(stderr, "ssh: %-15s " fmt "\n", \
53 __func__, ##__VA_ARGS__); \
57 typedef struct BDRVSSHState
{
62 int sock
; /* socket */
63 LIBSSH2_SESSION
*session
; /* ssh session */
64 LIBSSH2_SFTP
*sftp
; /* sftp session */
65 LIBSSH2_SFTP_HANDLE
*sftp_handle
; /* sftp remote file handle */
67 /* See ssh_seek() function below. */
71 /* File attributes at open. We try to keep the .filesize field
72 * updated if it changes (eg by writing at the end of the file).
74 LIBSSH2_SFTP_ATTRIBUTES attrs
;
77 static void ssh_state_init(BDRVSSHState
*s
)
79 memset(s
, 0, sizeof *s
);
82 qemu_co_mutex_init(&s
->lock
);
85 static void ssh_state_free(BDRVSSHState
*s
)
88 libssh2_sftp_close(s
->sftp_handle
);
91 libssh2_sftp_shutdown(s
->sftp
);
94 libssh2_session_disconnect(s
->session
,
95 "from qemu ssh client: "
96 "user closed the connection");
97 libssh2_session_free(s
->session
);
104 /* Wrappers around error_report which make sure to dump as much
105 * information from libssh2 as possible.
108 session_error_report(BDRVSSHState
*s
, const char *fs
, ...)
113 error_vprintf(fs
, args
);
119 libssh2_session_last_error((s
)->session
, &ssh_err
, NULL
, 0);
120 /* This is not an errno. See <libssh2.h>. */
121 ssh_err_code
= libssh2_session_last_errno((s
)->session
);
123 error_printf(": %s (libssh2 error code: %d)", ssh_err
, ssh_err_code
);
131 sftp_error_report(BDRVSSHState
*s
, const char *fs
, ...)
136 error_vprintf(fs
, args
);
141 unsigned long sftp_err_code
;
143 libssh2_session_last_error((s
)->session
, &ssh_err
, NULL
, 0);
144 /* This is not an errno. See <libssh2.h>. */
145 ssh_err_code
= libssh2_session_last_errno((s
)->session
);
146 /* See <libssh2_sftp.h>. */
147 sftp_err_code
= libssh2_sftp_last_error((s
)->sftp
);
149 error_printf(": %s (libssh2 error code: %d, sftp error code: %lu)",
150 ssh_err
, ssh_err_code
, sftp_err_code
);
157 static int parse_uri(const char *filename
, QDict
*options
, Error
**errp
)
160 QueryParams
*qp
= NULL
;
163 uri
= uri_parse(filename
);
168 if (strcmp(uri
->scheme
, "ssh") != 0) {
169 error_setg(errp
, "URI scheme must be 'ssh'");
173 if (!uri
->server
|| strcmp(uri
->server
, "") == 0) {
174 error_setg(errp
, "missing hostname in URI");
178 if (!uri
->path
|| strcmp(uri
->path
, "") == 0) {
179 error_setg(errp
, "missing remote path in URI");
183 qp
= query_params_parse(uri
->query
);
185 error_setg(errp
, "could not parse query parameters");
189 if(uri
->user
&& strcmp(uri
->user
, "") != 0) {
190 qdict_put(options
, "user", qstring_from_str(uri
->user
));
193 qdict_put(options
, "host", qstring_from_str(uri
->server
));
196 qdict_put(options
, "port", qint_from_int(uri
->port
));
199 qdict_put(options
, "path", qstring_from_str(uri
->path
));
201 /* Pick out any query parameters that we understand, and ignore
204 for (i
= 0; i
< qp
->n
; ++i
) {
205 if (strcmp(qp
->p
[i
].name
, "host_key_check") == 0) {
206 qdict_put(options
, "host_key_check",
207 qstring_from_str(qp
->p
[i
].value
));
211 query_params_free(qp
);
217 query_params_free(qp
);
225 static void ssh_parse_filename(const char *filename
, QDict
*options
,
228 if (qdict_haskey(options
, "user") ||
229 qdict_haskey(options
, "host") ||
230 qdict_haskey(options
, "port") ||
231 qdict_haskey(options
, "path") ||
232 qdict_haskey(options
, "host_key_check")) {
233 error_setg(errp
, "user, host, port, path, host_key_check cannot be used at the same time as a file option");
237 parse_uri(filename
, options
, errp
);
240 static int check_host_key_knownhosts(BDRVSSHState
*s
,
241 const char *host
, int port
)
244 char *knh_file
= NULL
;
245 LIBSSH2_KNOWNHOSTS
*knh
= NULL
;
246 struct libssh2_knownhost
*found
;
252 hostkey
= libssh2_session_hostkey(s
->session
, &len
, &type
);
255 session_error_report(s
, "failed to read remote host key");
259 knh
= libssh2_knownhost_init(s
->session
);
262 session_error_report(s
, "failed to initialize known hosts support");
266 home
= getenv("HOME");
268 knh_file
= g_strdup_printf("%s/.ssh/known_hosts", home
);
270 knh_file
= g_strdup_printf("/root/.ssh/known_hosts");
273 /* Read all known hosts from OpenSSH-style known_hosts file. */
274 libssh2_knownhost_readfile(knh
, knh_file
, LIBSSH2_KNOWNHOST_FILE_OPENSSH
);
276 r
= libssh2_knownhost_checkp(knh
, host
, port
, hostkey
, len
,
277 LIBSSH2_KNOWNHOST_TYPE_PLAIN
|
278 LIBSSH2_KNOWNHOST_KEYENC_RAW
,
281 case LIBSSH2_KNOWNHOST_CHECK_MATCH
:
283 DPRINTF("host key OK: %s", found
->key
);
285 case LIBSSH2_KNOWNHOST_CHECK_MISMATCH
:
287 session_error_report(s
, "host key does not match the one in known_hosts (found key %s)",
290 case LIBSSH2_KNOWNHOST_CHECK_NOTFOUND
:
292 session_error_report(s
, "no host key was found in known_hosts");
294 case LIBSSH2_KNOWNHOST_CHECK_FAILURE
:
296 session_error_report(s
, "failure matching the host key with known_hosts");
300 session_error_report(s
, "unknown error matching the host key with known_hosts (%d)",
305 /* known_hosts checking successful. */
310 libssh2_knownhost_free(knh
);
316 static unsigned hex2decimal(char ch
)
318 if (ch
>= '0' && ch
<= '9') {
320 } else if (ch
>= 'a' && ch
<= 'f') {
321 return 10 + (ch
- 'a');
322 } else if (ch
>= 'A' && ch
<= 'F') {
323 return 10 + (ch
- 'A');
329 /* Compare the binary fingerprint (hash of host key) with the
330 * host_key_check parameter.
332 static int compare_fingerprint(const unsigned char *fingerprint
, size_t len
,
333 const char *host_key_check
)
338 while (*host_key_check
== ':')
340 if (!qemu_isxdigit(host_key_check
[0]) ||
341 !qemu_isxdigit(host_key_check
[1]))
343 c
= hex2decimal(host_key_check
[0]) * 16 +
344 hex2decimal(host_key_check
[1]);
345 if (c
- *fingerprint
!= 0)
346 return c
- *fingerprint
;
351 return *host_key_check
- '\0';
355 check_host_key_hash(BDRVSSHState
*s
, const char *hash
,
356 int hash_type
, size_t fingerprint_len
)
358 const char *fingerprint
;
360 fingerprint
= libssh2_hostkey_hash(s
->session
, hash_type
);
362 session_error_report(s
, "failed to read remote host key");
366 if(compare_fingerprint((unsigned char *) fingerprint
, fingerprint_len
,
368 error_report("remote host key does not match host_key_check '%s'",
376 static int check_host_key(BDRVSSHState
*s
, const char *host
, int port
,
377 const char *host_key_check
)
379 /* host_key_check=no */
380 if (strcmp(host_key_check
, "no") == 0) {
384 /* host_key_check=md5:xx:yy:zz:... */
385 if (strlen(host_key_check
) >= 4 &&
386 strncmp(host_key_check
, "md5:", 4) == 0) {
387 return check_host_key_hash(s
, &host_key_check
[4],
388 LIBSSH2_HOSTKEY_HASH_MD5
, 16);
391 /* host_key_check=sha1:xx:yy:zz:... */
392 if (strlen(host_key_check
) >= 5 &&
393 strncmp(host_key_check
, "sha1:", 5) == 0) {
394 return check_host_key_hash(s
, &host_key_check
[5],
395 LIBSSH2_HOSTKEY_HASH_SHA1
, 20);
398 /* host_key_check=yes */
399 if (strcmp(host_key_check
, "yes") == 0) {
400 return check_host_key_knownhosts(s
, host
, port
);
403 error_report("unknown host_key_check setting (%s)", host_key_check
);
407 static int authenticate(BDRVSSHState
*s
, const char *user
)
410 const char *userauthlist
;
411 LIBSSH2_AGENT
*agent
= NULL
;
412 struct libssh2_agent_publickey
*identity
;
413 struct libssh2_agent_publickey
*prev_identity
= NULL
;
415 userauthlist
= libssh2_userauth_list(s
->session
, user
, strlen(user
));
416 if (strstr(userauthlist
, "publickey") == NULL
) {
418 error_report("remote server does not support \"publickey\" authentication");
422 /* Connect to ssh-agent and try each identity in turn. */
423 agent
= libssh2_agent_init(s
->session
);
426 session_error_report(s
, "failed to initialize ssh-agent support");
429 if (libssh2_agent_connect(agent
)) {
431 session_error_report(s
, "failed to connect to ssh-agent");
434 if (libssh2_agent_list_identities(agent
)) {
436 session_error_report(s
, "failed requesting identities from ssh-agent");
441 r
= libssh2_agent_get_identity(agent
, &identity
, prev_identity
);
442 if (r
== 1) { /* end of list */
447 session_error_report(s
, "failed to obtain identity from ssh-agent");
450 r
= libssh2_agent_userauth(agent
, user
, identity
);
456 /* Failed to authenticate with this identity, try the next one. */
457 prev_identity
= identity
;
461 error_report("failed to authenticate using publickey authentication "
462 "and the identities held by your ssh-agent");
466 /* Note: libssh2 implementation implicitly calls
467 * libssh2_agent_disconnect if necessary.
469 libssh2_agent_free(agent
);
475 static int connect_to_ssh(BDRVSSHState
*s
, QDict
*options
,
476 int ssh_flags
, int creat_mode
)
480 const char *host
, *user
, *path
, *host_key_check
;
482 char *hostport
= NULL
;
484 host
= qdict_get_str(options
, "host");
486 if (qdict_haskey(options
, "port")) {
487 port
= qdict_get_int(options
, "port");
492 path
= qdict_get_str(options
, "path");
494 if (qdict_haskey(options
, "user")) {
495 user
= qdict_get_str(options
, "user");
497 user
= g_get_user_name();
504 if (qdict_haskey(options
, "host_key_check")) {
505 host_key_check
= qdict_get_str(options
, "host_key_check");
507 host_key_check
= "yes";
510 /* Open the socket and connect. */
511 hostport
= g_strdup_printf("%s:%d", host
, port
);
512 s
->sock
= inet_connect(hostport
, &err
);
515 qerror_report_err(err
);
520 /* Create SSH session. */
521 s
->session
= libssh2_session_init();
524 session_error_report(s
, "failed to initialize libssh2 session");
528 #if TRACE_LIBSSH2 != 0
529 libssh2_trace(s
->session
, TRACE_LIBSSH2
);
532 r
= libssh2_session_handshake(s
->session
, s
->sock
);
535 session_error_report(s
, "failed to establish SSH session");
539 /* Check the remote host's key against known_hosts. */
540 ret
= check_host_key(s
, host
, port
, host_key_check
);
546 ret
= authenticate(s
, user
);
552 s
->sftp
= libssh2_sftp_init(s
->session
);
554 session_error_report(s
, "failed to initialize sftp handle");
559 /* Open the remote file. */
560 DPRINTF("opening file %s flags=0x%x creat_mode=0%o",
561 path
, ssh_flags
, creat_mode
);
562 s
->sftp_handle
= libssh2_sftp_open(s
->sftp
, path
, ssh_flags
, creat_mode
);
563 if (!s
->sftp_handle
) {
564 session_error_report(s
, "failed to open remote file '%s'", path
);
569 r
= libssh2_sftp_fstat(s
->sftp_handle
, &s
->attrs
);
571 sftp_error_report(s
, "failed to read file attributes");
575 /* Delete the options we've used; any not deleted will cause the
576 * block layer to give an error about unused options.
578 qdict_del(options
, "host");
579 qdict_del(options
, "port");
580 qdict_del(options
, "user");
581 qdict_del(options
, "path");
582 qdict_del(options
, "host_key_check");
588 if (s
->sftp_handle
) {
589 libssh2_sftp_close(s
->sftp_handle
);
591 s
->sftp_handle
= NULL
;
593 libssh2_sftp_shutdown(s
->sftp
);
597 libssh2_session_disconnect(s
->session
,
598 "from qemu ssh client: "
599 "error opening connection");
600 libssh2_session_free(s
->session
);
608 static int ssh_file_open(BlockDriverState
*bs
, const char *filename
,
609 QDict
*options
, int bdrv_flags
)
611 BDRVSSHState
*s
= bs
->opaque
;
617 ssh_flags
= LIBSSH2_FXF_READ
;
618 if (bdrv_flags
& BDRV_O_RDWR
) {
619 ssh_flags
|= LIBSSH2_FXF_WRITE
;
623 ret
= connect_to_ssh(s
, options
, ssh_flags
, 0);
628 /* Go non-blocking. */
629 libssh2_session_set_blocking(s
->session
, 0);
642 static QEMUOptionParameter ssh_create_options
[] = {
644 .name
= BLOCK_OPT_SIZE
,
646 .help
= "Virtual disk size"
651 static int ssh_create(const char *filename
, QEMUOptionParameter
*options
)
654 Error
*local_err
= NULL
;
655 int64_t total_size
= 0;
656 QDict
*uri_options
= NULL
;
659 char c
[1] = { '\0' };
663 /* Get desired file size. */
664 while (options
&& options
->name
) {
665 if (!strcmp(options
->name
, BLOCK_OPT_SIZE
)) {
666 total_size
= options
->value
.n
;
670 DPRINTF("total_size=%" PRIi64
, total_size
);
672 uri_options
= qdict_new();
673 r
= parse_uri(filename
, uri_options
, &local_err
);
675 qerror_report_err(local_err
);
676 error_free(local_err
);
681 r
= connect_to_ssh(&s
, uri_options
,
682 LIBSSH2_FXF_READ
|LIBSSH2_FXF_WRITE
|
683 LIBSSH2_FXF_CREAT
|LIBSSH2_FXF_TRUNC
, 0644);
689 if (total_size
> 0) {
690 libssh2_sftp_seek64(s
.sftp_handle
, total_size
-1);
691 r2
= libssh2_sftp_write(s
.sftp_handle
, c
, 1);
693 sftp_error_report(&s
, "truncate failed");
697 s
.attrs
.filesize
= total_size
;
704 if (uri_options
!= NULL
) {
705 QDECREF(uri_options
);
710 static void ssh_close(BlockDriverState
*bs
)
712 BDRVSSHState
*s
= bs
->opaque
;
717 static void restart_coroutine(void *opaque
)
719 Coroutine
*co
= opaque
;
721 DPRINTF("co=%p", co
);
723 qemu_coroutine_enter(co
, NULL
);
726 /* Always true because when we have called set_fd_handler there is
727 * always a request being processed.
729 static int return_true(void *opaque
)
734 static coroutine_fn
void set_fd_handler(BDRVSSHState
*s
)
737 IOHandler
*rd_handler
= NULL
, *wr_handler
= NULL
;
738 Coroutine
*co
= qemu_coroutine_self();
740 r
= libssh2_session_block_directions(s
->session
);
742 if (r
& LIBSSH2_SESSION_BLOCK_INBOUND
) {
743 rd_handler
= restart_coroutine
;
745 if (r
& LIBSSH2_SESSION_BLOCK_OUTBOUND
) {
746 wr_handler
= restart_coroutine
;
749 DPRINTF("s->sock=%d rd_handler=%p wr_handler=%p", s
->sock
,
750 rd_handler
, wr_handler
);
752 qemu_aio_set_fd_handler(s
->sock
, rd_handler
, wr_handler
, return_true
, co
);
755 static coroutine_fn
void clear_fd_handler(BDRVSSHState
*s
)
757 DPRINTF("s->sock=%d", s
->sock
);
758 qemu_aio_set_fd_handler(s
->sock
, NULL
, NULL
, NULL
, NULL
);
761 /* A non-blocking call returned EAGAIN, so yield, ensuring the
762 * handlers are set up so that we'll be rescheduled when there is an
763 * interesting event on the socket.
765 static coroutine_fn
void co_yield(BDRVSSHState
*s
)
768 qemu_coroutine_yield();
772 /* SFTP has a function `libssh2_sftp_seek64' which seeks to a position
773 * in the remote file. Notice that it just updates a field in the
774 * sftp_handle structure, so there is no network traffic and it cannot
777 * However, `libssh2_sftp_seek64' does have a catastrophic effect on
778 * performance since it causes the handle to throw away all in-flight
779 * reads and buffered readahead data. Therefore this function tries
780 * to be intelligent about when to call the underlying libssh2 function.
782 #define SSH_SEEK_WRITE 0
783 #define SSH_SEEK_READ 1
784 #define SSH_SEEK_FORCE 2
786 static void ssh_seek(BDRVSSHState
*s
, int64_t offset
, int flags
)
788 bool op_read
= (flags
& SSH_SEEK_READ
) != 0;
789 bool force
= (flags
& SSH_SEEK_FORCE
) != 0;
791 if (force
|| op_read
!= s
->offset_op_read
|| offset
!= s
->offset
) {
792 DPRINTF("seeking to offset=%" PRIi64
, offset
);
793 libssh2_sftp_seek64(s
->sftp_handle
, offset
);
795 s
->offset_op_read
= op_read
;
799 static coroutine_fn
int ssh_read(BDRVSSHState
*s
,
800 int64_t offset
, size_t size
,
805 char *buf
, *end_of_vec
;
808 DPRINTF("offset=%" PRIi64
" size=%zu", offset
, size
);
810 ssh_seek(s
, offset
, SSH_SEEK_READ
);
812 /* This keeps track of the current iovec element ('i'), where we
813 * will write to next ('buf'), and the end of the current iovec
818 end_of_vec
= i
->iov_base
+ i
->iov_len
;
820 /* libssh2 has a hard-coded limit of 2000 bytes per request,
821 * although it will also do readahead behind our backs. Therefore
822 * we may have to do repeated reads here until we have read 'size'
825 for (got
= 0; got
< size
; ) {
827 DPRINTF("sftp_read buf=%p size=%zu", buf
, end_of_vec
- buf
);
828 r
= libssh2_sftp_read(s
->sftp_handle
, buf
, end_of_vec
- buf
);
829 DPRINTF("sftp_read returned %zd", r
);
831 if (r
== LIBSSH2_ERROR_EAGAIN
|| r
== LIBSSH2_ERROR_TIMEOUT
) {
836 sftp_error_report(s
, "read failed");
841 /* EOF: Short read so pad the buffer with zeroes and return it. */
842 qemu_iovec_memset(qiov
, got
, 0, size
- got
);
849 if (buf
>= end_of_vec
&& got
< size
) {
852 end_of_vec
= i
->iov_base
+ i
->iov_len
;
859 static coroutine_fn
int ssh_co_readv(BlockDriverState
*bs
,
861 int nb_sectors
, QEMUIOVector
*qiov
)
863 BDRVSSHState
*s
= bs
->opaque
;
866 qemu_co_mutex_lock(&s
->lock
);
867 ret
= ssh_read(s
, sector_num
* BDRV_SECTOR_SIZE
,
868 nb_sectors
* BDRV_SECTOR_SIZE
, qiov
);
869 qemu_co_mutex_unlock(&s
->lock
);
874 static int ssh_write(BDRVSSHState
*s
,
875 int64_t offset
, size_t size
,
880 char *buf
, *end_of_vec
;
883 DPRINTF("offset=%" PRIi64
" size=%zu", offset
, size
);
885 ssh_seek(s
, offset
, SSH_SEEK_WRITE
);
887 /* This keeps track of the current iovec element ('i'), where we
888 * will read from next ('buf'), and the end of the current iovec
893 end_of_vec
= i
->iov_base
+ i
->iov_len
;
895 for (written
= 0; written
< size
; ) {
897 DPRINTF("sftp_write buf=%p size=%zu", buf
, end_of_vec
- buf
);
898 r
= libssh2_sftp_write(s
->sftp_handle
, buf
, end_of_vec
- buf
);
899 DPRINTF("sftp_write returned %zd", r
);
901 if (r
== LIBSSH2_ERROR_EAGAIN
|| r
== LIBSSH2_ERROR_TIMEOUT
) {
906 sftp_error_report(s
, "write failed");
910 /* The libssh2 API is very unclear about this. A comment in
911 * the code says "nothing was acked, and no EAGAIN was
912 * received!" which apparently means that no data got sent
913 * out, and the underlying channel didn't return any EAGAIN
914 * indication. I think this is a bug in either libssh2 or
915 * OpenSSH (server-side). In any case, forcing a seek (to
916 * discard libssh2 internal buffers), and then trying again
920 ssh_seek(s
, offset
+ written
, SSH_SEEK_WRITE
|SSH_SEEK_FORCE
);
928 if (buf
>= end_of_vec
&& written
< size
) {
931 end_of_vec
= i
->iov_base
+ i
->iov_len
;
934 if (offset
+ written
> s
->attrs
.filesize
)
935 s
->attrs
.filesize
= offset
+ written
;
941 static coroutine_fn
int ssh_co_writev(BlockDriverState
*bs
,
943 int nb_sectors
, QEMUIOVector
*qiov
)
945 BDRVSSHState
*s
= bs
->opaque
;
948 qemu_co_mutex_lock(&s
->lock
);
949 ret
= ssh_write(s
, sector_num
* BDRV_SECTOR_SIZE
,
950 nb_sectors
* BDRV_SECTOR_SIZE
, qiov
);
951 qemu_co_mutex_unlock(&s
->lock
);
956 static int64_t ssh_getlength(BlockDriverState
*bs
)
958 BDRVSSHState
*s
= bs
->opaque
;
961 /* Note we cannot make a libssh2 call here. */
962 length
= (int64_t) s
->attrs
.filesize
;
963 DPRINTF("length=%" PRIi64
, length
);
968 static BlockDriver bdrv_ssh
= {
969 .format_name
= "ssh",
970 .protocol_name
= "ssh",
971 .instance_size
= sizeof(BDRVSSHState
),
972 .bdrv_parse_filename
= ssh_parse_filename
,
973 .bdrv_file_open
= ssh_file_open
,
974 .bdrv_create
= ssh_create
,
975 .bdrv_close
= ssh_close
,
976 .bdrv_co_readv
= ssh_co_readv
,
977 .bdrv_co_writev
= ssh_co_writev
,
978 .bdrv_getlength
= ssh_getlength
,
979 .create_options
= ssh_create_options
,
982 static void bdrv_ssh_init(void)
988 fprintf(stderr
, "libssh2 initialization failed, %d\n", r
);
992 bdrv_register(&bdrv_ssh
);
995 block_init(bdrv_ssh_init
);