mirror of https://gitlab.com/qemu-project/qemu
nbd patches for 2019-01-05
Error and trace improvements in NBD code, such as less noise for common disconnect scenarios. - Vladimir Sementsov-Ogievskiy: 0/3 nbd-client: drop extra error noise - Eric Blake: portions of 0/22 nbd: add qemu-nbd --list -----BEGIN PGP SIGNATURE----- iQEcBAABCAAGBQJcMLgeAAoJEKeha0olJ0NqzXgH/RVRrCtmz0dOrrAkoJUfFX3t AcnOSb8nTWXTLGvGpU6x5l9yGL77VaN83j3z/4tXAraGA3sZsFx4cNNepT7P3zBB GlyT/b/Aie4EQAJPjuZdIZBe5pR6seSLoMFoGiga2oS2ik/wx4Wxxn9Gf9ZHUwVO muCtsJQypNrfbv7GY2Qf5NKyB2IQxt4ljSCqOmi0/T2//mQrdmRhcHbgTTDUA5HS 3Rpr9gPV0u6YzA9foCu+UqUpyhF3RBQY9sSMLS+Y9L6W72WgynrG7y0A637o4Q61 W+2UDDjuvyyCDR8DjD+LnWyGn4QuxIglfta2kFRcFGoPr1GqcmP4gDLeqqdJKFs= =R1PV -----END PGP SIGNATURE----- Merge remote-tracking branch 'remotes/ericb/tags/pull-nbd-2019-01-05' into staging nbd patches for 2019-01-05 Error and trace improvements in NBD code, such as less noise for common disconnect scenarios. - Vladimir Sementsov-Ogievskiy: 0/3 nbd-client: drop extra error noise - Eric Blake: portions of 0/22 nbd: add qemu-nbd --list # gpg: Signature made Sat 05 Jan 2019 13:58:54 GMT # gpg: using RSA key A7A16B4A2527436A # gpg: Good signature from "Eric Blake <eblake@redhat.com>" # gpg: aka "Eric Blake (Free Software Programmer) <ebb9@byu.net>" # gpg: aka "[jpeg image of size 6874]" # Primary key fingerprint: 71C2 CC22 B1C4 6029 27D2 F3AA A7A1 6B4A 2527 436A * remotes/ericb/tags/pull-nbd-2019-01-05: nbd/client: Drop pointless buf variable qemu-nbd: Fail earlier for -c/-d on non-linux nbd/client: More consistent error messages nbd: Document timeline of various features qemu-nbd: Use program name in error messages block/nbd-client: use traces instead of noisy error_report_err nbd/client: Trace all server option error messages nbd: publish _lookup functions Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell
commit
a29644590f
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|
@ -28,6 +28,8 @@
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*/
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#include "qemu/osdep.h"
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#include "trace.h"
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#include "qapi/error.h"
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#include "nbd-client.h"
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@ -79,7 +81,8 @@ static coroutine_fn void nbd_read_reply_entry(void *opaque)
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assert(s->reply.handle == 0);
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ret = nbd_receive_reply(s->ioc, &s->reply, &local_err);
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if (local_err) {
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error_report_err(local_err);
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trace_nbd_read_reply_entry_fail(ret, error_get_pretty(local_err));
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error_free(local_err);
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}
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if (ret <= 0) {
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break;
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@ -771,7 +774,11 @@ static int nbd_co_request(BlockDriverState *bs, NBDRequest *request,
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ret = nbd_co_receive_return_code(client, request->handle, &local_err);
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if (local_err) {
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error_report_err(local_err);
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trace_nbd_co_request_fail(request->from, request->len, request->handle,
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request->flags, request->type,
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nbd_cmd_lookup(request->type),
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ret, error_get_pretty(local_err));
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error_free(local_err);
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}
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return ret;
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}
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@ -802,7 +809,11 @@ int nbd_client_co_preadv(BlockDriverState *bs, uint64_t offset,
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ret = nbd_co_receive_cmdread_reply(client, request.handle, offset, qiov,
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&local_err);
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if (local_err) {
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error_report_err(local_err);
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trace_nbd_co_request_fail(request.from, request.len, request.handle,
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request.flags, request.type,
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nbd_cmd_lookup(request.type),
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ret, error_get_pretty(local_err));
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error_free(local_err);
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}
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return ret;
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}
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@ -925,7 +936,11 @@ int coroutine_fn nbd_client_co_block_status(BlockDriverState *bs,
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ret = nbd_co_receive_blockstatus_reply(client, request.handle, bytes,
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&extent, &local_err);
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if (local_err) {
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error_report_err(local_err);
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trace_nbd_co_request_fail(request.from, request.len, request.handle,
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request.flags, request.type,
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nbd_cmd_lookup(request.type),
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ret, error_get_pretty(local_err));
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error_free(local_err);
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}
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if (ret < 0) {
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return ret;
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@ -156,3 +156,7 @@ nvme_cmd_map_qiov_iov(void *s, int i, void *page, int pages) "s %p iov[%d] %p pa
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# block/iscsi.c
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iscsi_xcopy(void *src_lun, uint64_t src_off, void *dst_lun, uint64_t dst_off, uint64_t bytes, int ret) "src_lun %p offset %"PRIu64" dst_lun %p offset %"PRIu64" bytes %"PRIu64" ret %d"
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# block/nbd-client.c
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nbd_read_reply_entry_fail(int ret, const char *err) "ret = %d, err: %s"
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nbd_co_request_fail(uint64_t from, uint32_t len, uint64_t handle, uint16_t flags, uint16_t type, const char *name, int ret, const char *err) "Request failed { .from = %" PRIu64", .len = %" PRIu32 ", .handle = %" PRIu64 ", .flags = 0x%" PRIx16 ", .type = %" PRIu16 " (%s) } ret = %d, err: %s"
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|
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@ -15,7 +15,6 @@ Qemu supports the "base:allocation" metadata context as defined in the
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NBD protocol specification, and also defines an additional metadata
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namespace "qemu".
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== "qemu" namespace ==
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The "qemu" namespace currently contains only one type of context,
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@ -36,3 +35,21 @@ in addition to "qemu:dirty-bitmap:<dirty-bitmap-export-name>":
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namespace.
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* "qemu:dirty-bitmap:" - returns list of all available dirty-bitmap
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metadata contexts.
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= Features by version =
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The following list documents which qemu version first implemented
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various features (both as a server exposing the feature, and as a
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client taking advantage of the feature when present), to make it
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easier to plan for cross-version interoperability. Note that in
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several cases, the initial release containing a feature may require
|
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additional patches from the corresponding stable branch to fix bugs in
|
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the operation of that feature.
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* 2.6: NBD_OPT_STARTTLS with TLS X.509 Certificates
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* 2.8: NBD_CMD_WRITE_ZEROES
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* 2.10: NBD_OPT_GO, NBD_INFO_BLOCK
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* 2.11: NBD_OPT_STRUCTURED_REPLY
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* 2.12: NBD_CMD_BLOCK_STATUS for "base:allocation"
|
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* 3.0: NBD_OPT_STARTTLS with TLS Pre-Shared Keys (PSK),
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NBD_CMD_BLOCK_STATUS for "qemu:dirty-bitmap:", NBD_CMD_CACHE
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|
|
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|
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@ -343,5 +343,10 @@ static inline bool nbd_reply_is_structured(NBDReply *reply)
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}
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const char *nbd_reply_type_lookup(uint16_t type);
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const char *nbd_opt_lookup(uint32_t opt);
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const char *nbd_rep_lookup(uint32_t rep);
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const char *nbd_info_lookup(uint16_t info);
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const char *nbd_cmd_lookup(uint16_t info);
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const char *nbd_err_lookup(int err);
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#endif
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|
|
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63
nbd/client.c
63
nbd/client.c
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@ -132,8 +132,9 @@ static int nbd_receive_option_reply(QIOChannel *ioc, uint32_t opt,
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return -1;
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}
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if (reply->option != opt) {
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error_setg(errp, "Unexpected option type %x expected %x",
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reply->option, opt);
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error_setg(errp, "Unexpected option type %u (%s), expected %u (%s)",
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reply->option, nbd_opt_lookup(reply->option),
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opt, nbd_opt_lookup(opt));
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nbd_send_opt_abort(ioc);
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return -1;
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}
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@ -171,6 +172,8 @@ static int nbd_handle_reply_err(QIOChannel *ioc, NBDOptionReply *reply,
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goto cleanup;
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}
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msg[reply->length] = '\0';
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trace_nbd_server_error_msg(reply->type,
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nbd_reply_type_lookup(reply->type), msg);
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}
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switch (reply->type) {
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@ -265,8 +268,9 @@ static int nbd_receive_list(QIOChannel *ioc, const char *want, bool *match,
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}
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return 0;
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} else if (reply.type != NBD_REP_SERVER) {
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error_setg(errp, "Unexpected reply type %" PRIx32 " expected %x",
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reply.type, NBD_REP_SERVER);
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error_setg(errp, "Unexpected reply type %u (%s), expected %u (%s)",
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reply.type, nbd_rep_lookup(reply.type),
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NBD_REP_SERVER, nbd_rep_lookup(NBD_REP_SERVER));
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nbd_send_opt_abort(ioc);
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return -1;
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}
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@ -378,9 +382,9 @@ static int nbd_opt_go(QIOChannel *ioc, const char *wantname,
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return 1;
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}
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if (reply.type != NBD_REP_INFO) {
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error_setg(errp, "unexpected reply type %" PRIu32
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" (%s), expected %u",
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reply.type, nbd_rep_lookup(reply.type), NBD_REP_INFO);
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error_setg(errp, "unexpected reply type %u (%s), expected %u (%s)",
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reply.type, nbd_rep_lookup(reply.type),
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NBD_REP_INFO, nbd_rep_lookup(NBD_REP_INFO));
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nbd_send_opt_abort(ioc);
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return -1;
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}
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@ -704,8 +708,9 @@ static int nbd_negotiate_simple_meta_context(QIOChannel *ioc,
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}
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if (reply.type != NBD_REP_ACK) {
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error_setg(errp, "Unexpected reply type %" PRIx32 " expected %x",
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reply.type, NBD_REP_ACK);
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error_setg(errp, "Unexpected reply type %u (%s), expected %u (%s)",
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reply.type, nbd_rep_lookup(reply.type),
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NBD_REP_ACK, nbd_rep_lookup(NBD_REP_ACK));
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nbd_send_opt_abort(ioc);
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return -1;
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}
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@ -728,7 +733,6 @@ int nbd_receive_negotiate(QIOChannel *ioc, const char *name,
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QIOChannel **outioc, NBDExportInfo *info,
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Error **errp)
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{
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char buf[256];
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uint64_t magic;
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int rc;
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bool zeroes = true;
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|
|
@ -749,27 +753,20 @@ int nbd_receive_negotiate(QIOChannel *ioc, const char *name,
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goto fail;
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}
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if (nbd_read(ioc, buf, 8, errp) < 0) {
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error_prepend(errp, "Failed to read data: ");
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if (nbd_read(ioc, &magic, sizeof(magic), errp) < 0) {
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error_prepend(errp, "Failed to read initial magic: ");
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goto fail;
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}
|
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|
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buf[8] = '\0';
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if (strlen(buf) == 0) {
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error_setg(errp, "Server connection closed unexpectedly");
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goto fail;
|
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}
|
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|
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magic = ldq_be_p(buf);
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magic = be64_to_cpu(magic);
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trace_nbd_receive_negotiate_magic(magic);
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|
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if (memcmp(buf, "NBDMAGIC", 8) != 0) {
|
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error_setg(errp, "Invalid magic received");
|
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if (magic != NBD_INIT_MAGIC) {
|
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error_setg(errp, "Bad initial magic received: 0x%" PRIx64, magic);
|
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goto fail;
|
||||
}
|
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|
||||
if (nbd_read(ioc, &magic, sizeof(magic), errp) < 0) {
|
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error_prepend(errp, "Failed to read magic: ");
|
||||
error_prepend(errp, "Failed to read server magic: ");
|
||||
goto fail;
|
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}
|
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magic = be64_to_cpu(magic);
|
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|
|
@ -908,7 +905,7 @@ int nbd_receive_negotiate(QIOChannel *ioc, const char *name,
|
|||
}
|
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info->flags = oldflags;
|
||||
} else {
|
||||
error_setg(errp, "Bad magic received");
|
||||
error_setg(errp, "Bad server magic received: 0x%" PRIx64, magic);
|
||||
goto fail;
|
||||
}
|
||||
|
||||
|
|
@ -1026,23 +1023,7 @@ int nbd_disconnect(int fd)
|
|||
return 0;
|
||||
}
|
||||
|
||||
#else
|
||||
int nbd_init(int fd, QIOChannelSocket *ioc, NBDExportInfo *info,
|
||||
Error **errp)
|
||||
{
|
||||
error_setg(errp, "nbd_init is only supported on Linux");
|
||||
return -ENOTSUP;
|
||||
}
|
||||
|
||||
int nbd_client(int fd)
|
||||
{
|
||||
return -ENOTSUP;
|
||||
}
|
||||
int nbd_disconnect(int fd)
|
||||
{
|
||||
return -ENOTSUP;
|
||||
}
|
||||
#endif
|
||||
#endif /* __linux__ */
|
||||
|
||||
int nbd_send_request(QIOChannel *ioc, NBDRequest *request)
|
||||
{
|
||||
|
|
|
|||
|
|
@ -46,8 +46,9 @@
|
|||
/* Size of oldstyle negotiation */
|
||||
#define NBD_OLDSTYLE_NEGOTIATE_SIZE (8 + 8 + 8 + 4 + 124)
|
||||
|
||||
#define NBD_INIT_MAGIC 0x4e42444d41474943LL /* ASCII "NBDMAGIC" */
|
||||
#define NBD_REQUEST_MAGIC 0x25609513
|
||||
#define NBD_OPTS_MAGIC 0x49484156454F5054LL
|
||||
#define NBD_OPTS_MAGIC 0x49484156454F5054LL /* ASCII "IHAVEOPT" */
|
||||
#define NBD_CLIENT_MAGIC 0x0000420281861253LL
|
||||
#define NBD_REP_MAGIC 0x0003e889045565a9LL
|
||||
|
||||
|
|
@ -100,11 +101,6 @@ struct NBDTLSHandshakeData {
|
|||
|
||||
void nbd_tls_handshake(QIOTask *task,
|
||||
void *opaque);
|
||||
const char *nbd_opt_lookup(uint32_t opt);
|
||||
const char *nbd_rep_lookup(uint32_t rep);
|
||||
const char *nbd_info_lookup(uint16_t info);
|
||||
const char *nbd_cmd_lookup(uint16_t info);
|
||||
const char *nbd_err_lookup(int err);
|
||||
|
||||
int nbd_drop(QIOChannel *ioc, size_t size, Error **errp);
|
||||
|
||||
|
|
|
|||
|
|
@ -1,6 +1,7 @@
|
|||
# nbd/client.c
|
||||
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 %" PRIu32" (%s), type %" PRIu32" (%s), len %" PRIu32
|
||||
nbd_server_error_msg(uint32_t err, const char *type, const char *msg) "server reported error 0x%" PRIx32 " (%s) with additional message: %s"
|
||||
nbd_reply_err_unsup(uint32_t option, const char *name) "server doesn't understand request %" PRIu32 " (%s), attempting fallback"
|
||||
nbd_opt_go_start(const char *name) "Attempting NBD_OPT_GO for export '%s'"
|
||||
nbd_opt_go_success(void) "Export is good to go"
|
||||
|
|
|
|||
22
qemu-nbd.c
22
qemu-nbd.c
|
|
@ -43,6 +43,12 @@
|
|||
#include "trace/control.h"
|
||||
#include "qemu-version.h"
|
||||
|
||||
#ifdef __linux__
|
||||
#define HAVE_NBD_DEVICE 1
|
||||
#else
|
||||
#define HAVE_NBD_DEVICE 0
|
||||
#endif
|
||||
|
||||
#define SOCKET_PATH "/var/lock/qemu-nbd-%s"
|
||||
#define QEMU_NBD_OPT_CACHE 256
|
||||
#define QEMU_NBD_OPT_AIO 257
|
||||
|
|
@ -98,11 +104,11 @@ static void usage(const char *name)
|
|||
" specify tracing options\n"
|
||||
" --fork fork off the server process and exit the parent\n"
|
||||
" once the server is running\n"
|
||||
#ifdef __linux__
|
||||
#if HAVE_NBD_DEVICE
|
||||
"\n"
|
||||
"Kernel NBD client support:\n"
|
||||
" -c, --connect=DEV connect FILE to the local NBD device DEV\n"
|
||||
" -d, --disconnect disconnect the specified device\n"
|
||||
"\n"
|
||||
#endif
|
||||
"\n"
|
||||
"Block device options:\n"
|
||||
|
|
@ -236,6 +242,7 @@ static void termsig_handler(int signum)
|
|||
}
|
||||
|
||||
|
||||
#if HAVE_NBD_DEVICE
|
||||
static void *show_parts(void *arg)
|
||||
{
|
||||
char *device = arg;
|
||||
|
|
@ -321,6 +328,7 @@ out:
|
|||
kill(getpid(), SIGTERM);
|
||||
return (void *) EXIT_FAILURE;
|
||||
}
|
||||
#endif /* HAVE_NBD_DEVICE */
|
||||
|
||||
static int nbd_can_accept(void)
|
||||
{
|
||||
|
|
@ -571,6 +579,7 @@ int main(int argc, char **argv)
|
|||
#endif
|
||||
|
||||
module_call_init(MODULE_INIT_TRACE);
|
||||
error_set_progname(argv[0]);
|
||||
qcrypto_init(&error_fatal);
|
||||
|
||||
module_call_init(MODULE_INIT_QOM);
|
||||
|
|
@ -813,6 +822,12 @@ int main(int argc, char **argv)
|
|||
}
|
||||
}
|
||||
|
||||
#if !HAVE_NBD_DEVICE
|
||||
if (disconnect || device) {
|
||||
error_report("Kernel /dev/nbdN support not available");
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
#else /* HAVE_NBD_DEVICE */
|
||||
if (disconnect) {
|
||||
int nbdfd = open(argv[optind], O_RDWR);
|
||||
if (nbdfd < 0) {
|
||||
|
|
@ -828,6 +843,7 @@ int main(int argc, char **argv)
|
|||
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
if ((device && !verbose) || fork_process) {
|
||||
int stderr_fd[2];
|
||||
|
|
@ -1005,6 +1021,7 @@ int main(int argc, char **argv)
|
|||
nbd_export_set_description(exp, export_description);
|
||||
|
||||
if (device) {
|
||||
#if HAVE_NBD_DEVICE
|
||||
int ret;
|
||||
|
||||
ret = pthread_create(&client_thread, NULL, nbd_client_thread, device);
|
||||
|
|
@ -1012,6 +1029,7 @@ int main(int argc, char **argv)
|
|||
error_report("Failed to create client thread: %s", strerror(ret));
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
#endif
|
||||
} else {
|
||||
/* Shut up GCC warnings. */
|
||||
memset(&client_thread, 0, sizeof(client_thread));
|
||||
|
|
|
|||
|
|
@ -41,8 +41,6 @@ can't open device nbd+tcp://127.0.0.1:PORT/foo
|
|||
|
||||
=== Check disconnect after neg2 ===
|
||||
|
||||
Unable to read from socket: Connection reset by peer
|
||||
Connection closed
|
||||
read failed: Input/output error
|
||||
|
||||
=== Check disconnect 8 neg2 ===
|
||||
|
|
@ -55,40 +53,30 @@ can't open device nbd+tcp://127.0.0.1:PORT/foo
|
|||
|
||||
=== Check disconnect before request ===
|
||||
|
||||
Unable to read from socket: Connection reset by peer
|
||||
Connection closed
|
||||
read failed: Input/output error
|
||||
|
||||
=== Check disconnect after request ===
|
||||
|
||||
Connection closed
|
||||
read failed: Input/output error
|
||||
|
||||
=== Check disconnect before reply ===
|
||||
|
||||
Connection closed
|
||||
read failed: Input/output error
|
||||
|
||||
=== Check disconnect after reply ===
|
||||
|
||||
Unexpected end-of-file before all bytes were read
|
||||
read failed: Input/output error
|
||||
|
||||
=== Check disconnect 4 reply ===
|
||||
|
||||
Unexpected end-of-file before all bytes were read
|
||||
Connection closed
|
||||
read failed: Input/output error
|
||||
|
||||
=== Check disconnect 8 reply ===
|
||||
|
||||
Unexpected end-of-file before all bytes were read
|
||||
Connection closed
|
||||
read failed: Input/output error
|
||||
|
||||
=== Check disconnect before data ===
|
||||
|
||||
Unexpected end-of-file before all bytes were read
|
||||
read failed: Input/output error
|
||||
|
||||
=== Check disconnect after data ===
|
||||
|
|
@ -118,8 +106,6 @@ can't open device nbd+tcp://127.0.0.1:PORT/
|
|||
|
||||
=== Check disconnect after neg-classic ===
|
||||
|
||||
Unable to read from socket: Connection reset by peer
|
||||
Connection closed
|
||||
read failed: Input/output error
|
||||
|
||||
=== Check disconnect before neg1 ===
|
||||
|
|
@ -164,8 +150,6 @@ can't open device nbd+unix:///foo?socket=TEST_DIR/nbd.sock
|
|||
|
||||
=== Check disconnect after neg2 ===
|
||||
|
||||
Unable to read from socket: Connection reset by peer
|
||||
Connection closed
|
||||
read failed: Input/output error
|
||||
|
||||
=== Check disconnect 8 neg2 ===
|
||||
|
|
@ -178,40 +162,30 @@ can't open device nbd+unix:///foo?socket=TEST_DIR/nbd.sock
|
|||
|
||||
=== Check disconnect before request ===
|
||||
|
||||
Unable to read from socket: Connection reset by peer
|
||||
Connection closed
|
||||
read failed: Input/output error
|
||||
|
||||
=== Check disconnect after request ===
|
||||
|
||||
Connection closed
|
||||
read failed: Input/output error
|
||||
|
||||
=== Check disconnect before reply ===
|
||||
|
||||
Connection closed
|
||||
read failed: Input/output error
|
||||
|
||||
=== Check disconnect after reply ===
|
||||
|
||||
Unexpected end-of-file before all bytes were read
|
||||
read failed: Input/output error
|
||||
|
||||
=== Check disconnect 4 reply ===
|
||||
|
||||
Unexpected end-of-file before all bytes were read
|
||||
Connection closed
|
||||
read failed: Input/output error
|
||||
|
||||
=== Check disconnect 8 reply ===
|
||||
|
||||
Unexpected end-of-file before all bytes were read
|
||||
Connection closed
|
||||
read failed: Input/output error
|
||||
|
||||
=== Check disconnect before data ===
|
||||
|
||||
Unexpected end-of-file before all bytes were read
|
||||
read failed: Input/output error
|
||||
|
||||
=== Check disconnect after data ===
|
||||
|
|
@ -241,8 +215,6 @@ can't open device nbd+unix:///?socket=TEST_DIR/nbd.sock
|
|||
|
||||
=== Check disconnect after neg-classic ===
|
||||
|
||||
Unable to read from socket: Connection reset by peer
|
||||
Connection closed
|
||||
read failed: Input/output error
|
||||
|
||||
*** done
|
||||
|
|
|
|||
|
|
@ -27,7 +27,7 @@ virtual size: 64M (67108864 bytes)
|
|||
disk size: unavailable
|
||||
|
||||
== check TLS with different CA fails ==
|
||||
option negotiation failed: Verify failed: No certificate was found.
|
||||
qemu-nbd: option negotiation failed: Verify failed: No certificate was found.
|
||||
qemu-img: Could not open 'driver=nbd,host=127.0.0.1,port=PORT,tls-creds=tls0': The certificate hasn't got a known issuer
|
||||
|
||||
== perform I/O over TLS ==
|
||||
|
|
|
|||
Loading…
Reference in New Issue