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https://gitlab.com/qemu-project/qemu
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nbd/server: Mark negotiation functions as coroutine_fn
nbd_negotiate() is already marked coroutine_fn. And given the fix in the previous patch to have nbd_negotiate_handle_starttls not create and wait on a g_main_loop (as that would violate coroutine constraints), it is worth marking the rest of the related static functions reachable only during option negotiation as also being coroutine_fn. Suggested-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru> Signed-off-by: Eric Blake <eblake@redhat.com> Message-ID: <20240408160214.1200629-6-eblake@redhat.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru> [eblake: drop one spurious coroutine_fn marking] Signed-off-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Eric Blake
parent
ae6d91a7e9
commit
4fa333e08d
102
nbd/server.c
102
nbd/server.c
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@ -195,8 +195,9 @@ static inline void set_be_option_rep(NBDOptionReply *rep, uint32_t option,
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/* Send a reply header, including length, but no payload.
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* Return -errno on error, 0 on success. */
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static int nbd_negotiate_send_rep_len(NBDClient *client, uint32_t type,
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uint32_t len, Error **errp)
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static coroutine_fn int
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nbd_negotiate_send_rep_len(NBDClient *client, uint32_t type,
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uint32_t len, Error **errp)
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{
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NBDOptionReply rep;
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@ -211,15 +212,15 @@ static int nbd_negotiate_send_rep_len(NBDClient *client, uint32_t type,
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/* Send a reply header with default 0 length.
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* Return -errno on error, 0 on success. */
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static int nbd_negotiate_send_rep(NBDClient *client, uint32_t type,
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Error **errp)
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static coroutine_fn int
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nbd_negotiate_send_rep(NBDClient *client, uint32_t type, Error **errp)
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{
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return nbd_negotiate_send_rep_len(client, type, 0, errp);
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}
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/* Send an error reply.
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* Return -errno on error, 0 on success. */
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static int G_GNUC_PRINTF(4, 0)
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static coroutine_fn int G_GNUC_PRINTF(4, 0)
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nbd_negotiate_send_rep_verr(NBDClient *client, uint32_t type,
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Error **errp, const char *fmt, va_list va)
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{
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@ -259,7 +260,7 @@ nbd_sanitize_name(const char *name)
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/* Send an error reply.
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* Return -errno on error, 0 on success. */
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static int G_GNUC_PRINTF(4, 5)
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static coroutine_fn int G_GNUC_PRINTF(4, 5)
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nbd_negotiate_send_rep_err(NBDClient *client, uint32_t type,
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Error **errp, const char *fmt, ...)
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{
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@ -275,7 +276,7 @@ nbd_negotiate_send_rep_err(NBDClient *client, uint32_t type,
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/* Drop remainder of the current option, and send a reply with the
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* given error type and message. Return -errno on read or write
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* failure; or 0 if connection is still live. */
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static int G_GNUC_PRINTF(4, 0)
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static coroutine_fn int G_GNUC_PRINTF(4, 0)
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nbd_opt_vdrop(NBDClient *client, uint32_t type, Error **errp,
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const char *fmt, va_list va)
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{
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@ -288,7 +289,7 @@ nbd_opt_vdrop(NBDClient *client, uint32_t type, Error **errp,
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return ret;
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}
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static int G_GNUC_PRINTF(4, 5)
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static coroutine_fn int G_GNUC_PRINTF(4, 5)
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nbd_opt_drop(NBDClient *client, uint32_t type, Error **errp,
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const char *fmt, ...)
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{
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@ -302,7 +303,7 @@ nbd_opt_drop(NBDClient *client, uint32_t type, Error **errp,
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return ret;
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}
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static int G_GNUC_PRINTF(3, 4)
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static coroutine_fn int G_GNUC_PRINTF(3, 4)
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nbd_opt_invalid(NBDClient *client, Error **errp, const char *fmt, ...)
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{
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int ret;
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@ -319,8 +320,9 @@ nbd_opt_invalid(NBDClient *client, Error **errp, const char *fmt, ...)
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* If @check_nul, require that no NUL bytes appear in buffer.
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* Return -errno on I/O error, 0 if option was completely handled by
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* sending a reply about inconsistent lengths, or 1 on success. */
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static int nbd_opt_read(NBDClient *client, void *buffer, size_t size,
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bool check_nul, Error **errp)
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static coroutine_fn int
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nbd_opt_read(NBDClient *client, void *buffer, size_t size,
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bool check_nul, Error **errp)
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{
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if (size > client->optlen) {
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return nbd_opt_invalid(client, errp,
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@ -343,7 +345,8 @@ static int nbd_opt_read(NBDClient *client, void *buffer, size_t size,
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/* Drop size bytes from the unparsed payload of the current option.
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* Return -errno on I/O error, 0 if option was completely handled by
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* sending a reply about inconsistent lengths, or 1 on success. */
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static int nbd_opt_skip(NBDClient *client, size_t size, Error **errp)
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static coroutine_fn int
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nbd_opt_skip(NBDClient *client, size_t size, Error **errp)
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{
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if (size > client->optlen) {
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return nbd_opt_invalid(client, errp,
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@ -366,8 +369,9 @@ static int nbd_opt_skip(NBDClient *client, size_t size, Error **errp)
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* Return -errno on I/O error, 0 if option was completely handled by
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* sending a reply about inconsistent lengths, or 1 on success.
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*/
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static int nbd_opt_read_name(NBDClient *client, char **name, uint32_t *length,
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Error **errp)
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static coroutine_fn int
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nbd_opt_read_name(NBDClient *client, char **name, uint32_t *length,
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Error **errp)
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{
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int ret;
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uint32_t len;
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@ -402,8 +406,8 @@ static int nbd_opt_read_name(NBDClient *client, char **name, uint32_t *length,
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/* Send a single NBD_REP_SERVER reply to NBD_OPT_LIST, including payload.
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* Return -errno on error, 0 on success. */
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static int nbd_negotiate_send_rep_list(NBDClient *client, NBDExport *exp,
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Error **errp)
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static coroutine_fn int
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nbd_negotiate_send_rep_list(NBDClient *client, NBDExport *exp, Error **errp)
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{
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ERRP_GUARD();
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size_t name_len, desc_len;
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@ -444,7 +448,8 @@ static int nbd_negotiate_send_rep_list(NBDClient *client, NBDExport *exp,
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/* Process the NBD_OPT_LIST command, with a potential series of replies.
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* Return -errno on error, 0 on success. */
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static int nbd_negotiate_handle_list(NBDClient *client, Error **errp)
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static coroutine_fn int
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nbd_negotiate_handle_list(NBDClient *client, Error **errp)
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{
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NBDExport *exp;
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assert(client->opt == NBD_OPT_LIST);
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@ -459,7 +464,8 @@ static int nbd_negotiate_handle_list(NBDClient *client, Error **errp)
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return nbd_negotiate_send_rep(client, NBD_REP_ACK, errp);
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}
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static void nbd_check_meta_export(NBDClient *client, NBDExport *exp)
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static coroutine_fn void
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nbd_check_meta_export(NBDClient *client, NBDExport *exp)
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{
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if (exp != client->contexts.exp) {
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client->contexts.count = 0;
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@ -468,8 +474,9 @@ static void nbd_check_meta_export(NBDClient *client, NBDExport *exp)
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/* Send a reply to NBD_OPT_EXPORT_NAME.
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* Return -errno on error, 0 on success. */
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static int nbd_negotiate_handle_export_name(NBDClient *client, bool no_zeroes,
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Error **errp)
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static coroutine_fn int
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nbd_negotiate_handle_export_name(NBDClient *client, bool no_zeroes,
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Error **errp)
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{
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ERRP_GUARD();
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g_autofree char *name = NULL;
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@ -536,9 +543,9 @@ static int nbd_negotiate_handle_export_name(NBDClient *client, bool no_zeroes,
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/* Send a single NBD_REP_INFO, with a buffer @buf of @length bytes.
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* The buffer does NOT include the info type prefix.
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* Return -errno on error, 0 if ready to send more. */
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static int nbd_negotiate_send_info(NBDClient *client,
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uint16_t info, uint32_t length, void *buf,
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Error **errp)
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static coroutine_fn int
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nbd_negotiate_send_info(NBDClient *client, uint16_t info, uint32_t length,
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void *buf, Error **errp)
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{
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int rc;
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@ -565,7 +572,8 @@ static int nbd_negotiate_send_info(NBDClient *client,
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* -errno transmission error occurred or @fatal was requested, errp is set
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* 0 error message successfully sent to client, errp is not set
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*/
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static int nbd_reject_length(NBDClient *client, bool fatal, Error **errp)
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static coroutine_fn int
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nbd_reject_length(NBDClient *client, bool fatal, Error **errp)
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{
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int ret;
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@ -583,7 +591,8 @@ static int nbd_reject_length(NBDClient *client, bool fatal, Error **errp)
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/* Handle NBD_OPT_INFO and NBD_OPT_GO.
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* Return -errno on error, 0 if ready for next option, and 1 to move
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* into transmission phase. */
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static int nbd_negotiate_handle_info(NBDClient *client, Error **errp)
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static coroutine_fn int
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nbd_negotiate_handle_info(NBDClient *client, Error **errp)
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{
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int rc;
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g_autofree char *name = NULL;
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@ -755,7 +764,8 @@ struct NBDTLSServerHandshakeData {
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Coroutine *co;
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};
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static void nbd_server_tls_handshake(QIOTask *task, void *opaque)
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static void
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nbd_server_tls_handshake(QIOTask *task, void *opaque)
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{
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struct NBDTLSServerHandshakeData *data = opaque;
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@ -768,8 +778,8 @@ static void nbd_server_tls_handshake(QIOTask *task, void *opaque)
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/* Handle NBD_OPT_STARTTLS. Return NULL to drop connection, or else the
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* new channel for all further (now-encrypted) communication. */
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static QIOChannel *nbd_negotiate_handle_starttls(NBDClient *client,
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Error **errp)
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static coroutine_fn QIOChannel *
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nbd_negotiate_handle_starttls(NBDClient *client, Error **errp)
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{
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QIOChannel *ioc;
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QIOChannelTLS *tioc;
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@ -821,10 +831,9 @@ static QIOChannel *nbd_negotiate_handle_starttls(NBDClient *client,
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*
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* For NBD_OPT_LIST_META_CONTEXT @context_id is ignored, 0 is used instead.
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*/
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static int nbd_negotiate_send_meta_context(NBDClient *client,
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const char *context,
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uint32_t context_id,
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Error **errp)
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static coroutine_fn int
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nbd_negotiate_send_meta_context(NBDClient *client, const char *context,
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uint32_t context_id, Error **errp)
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{
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NBDOptionReplyMetaContext opt;
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struct iovec iov[] = {
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@ -849,8 +858,9 @@ static int nbd_negotiate_send_meta_context(NBDClient *client,
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* Return true if @query matches @pattern, or if @query is empty when
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* the @client is performing _LIST_.
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*/
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static bool nbd_meta_empty_or_pattern(NBDClient *client, const char *pattern,
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const char *query)
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static coroutine_fn bool
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nbd_meta_empty_or_pattern(NBDClient *client, const char *pattern,
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const char *query)
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{
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if (!*query) {
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trace_nbd_negotiate_meta_query_parse("empty");
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@ -867,7 +877,8 @@ static bool nbd_meta_empty_or_pattern(NBDClient *client, const char *pattern,
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/*
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* Return true and adjust @str in place if it begins with @prefix.
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*/
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static bool nbd_strshift(const char **str, const char *prefix)
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static coroutine_fn bool
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nbd_strshift(const char **str, const char *prefix)
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{
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size_t len = strlen(prefix);
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@ -883,8 +894,9 @@ static bool nbd_strshift(const char **str, const char *prefix)
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* Handle queries to 'base' namespace. For now, only the base:allocation
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* context is available. Return true if @query has been handled.
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*/
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static bool nbd_meta_base_query(NBDClient *client, NBDMetaContexts *meta,
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const char *query)
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static coroutine_fn bool
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nbd_meta_base_query(NBDClient *client, NBDMetaContexts *meta,
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const char *query)
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{
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if (!nbd_strshift(&query, "base:")) {
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return false;
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@ -903,8 +915,9 @@ static bool nbd_meta_base_query(NBDClient *client, NBDMetaContexts *meta,
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* and qemu:allocation-depth contexts are available. Return true if @query
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* has been handled.
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*/
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static bool nbd_meta_qemu_query(NBDClient *client, NBDMetaContexts *meta,
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const char *query)
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static coroutine_fn bool
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nbd_meta_qemu_query(NBDClient *client, NBDMetaContexts *meta,
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const char *query)
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{
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size_t i;
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@ -968,8 +981,9 @@ static bool nbd_meta_qemu_query(NBDClient *client, NBDMetaContexts *meta,
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*
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* Return -errno on I/O error, 0 if option was completely handled by
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* sending a reply about inconsistent lengths, or 1 on success. */
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static int nbd_negotiate_meta_query(NBDClient *client,
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NBDMetaContexts *meta, Error **errp)
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static coroutine_fn int
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nbd_negotiate_meta_query(NBDClient *client,
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NBDMetaContexts *meta, Error **errp)
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{
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int ret;
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g_autofree char *query = NULL;
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@ -1008,7 +1022,8 @@ static int nbd_negotiate_meta_query(NBDClient *client,
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* Handle NBD_OPT_LIST_META_CONTEXT and NBD_OPT_SET_META_CONTEXT
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*
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* Return -errno on I/O error, or 0 if option was completely handled. */
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static int nbd_negotiate_meta_queries(NBDClient *client, Error **errp)
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static coroutine_fn int
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nbd_negotiate_meta_queries(NBDClient *client, Error **errp)
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{
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int ret;
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g_autofree char *export_name = NULL;
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@ -1136,7 +1151,8 @@ static int nbd_negotiate_meta_queries(NBDClient *client, Error **errp)
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* 1 if client sent NBD_OPT_ABORT, i.e. on valid disconnect,
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* errp is not set
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*/
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static int nbd_negotiate_options(NBDClient *client, Error **errp)
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static coroutine_fn int
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nbd_negotiate_options(NBDClient *client, Error **errp)
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{
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uint32_t flags;
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bool fixedNewstyle = false;
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