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bh=DGlDNuyeK6ZUFejVGI4gg5g94gsU8TO4M2YH0XyWtrQ=; b=B1ZkBgmn/2O9P6pJHQ+10vIYtaT3AXJHdLhD1sYlWDSPejDQfhRv5U8l1pG9lqFp3P4/P+ fWzK3KII+TtThp8dqq/g8QMQ/kO7ARRzsBdVLHDhh8Lhl/8TQR3GS1/xyOl6PqwhZ1unVe bl8AzVCSuItOglEzIvTOey+FF8vuHxo= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1718992513; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=DGlDNuyeK6ZUFejVGI4gg5g94gsU8TO4M2YH0XyWtrQ=; b=sUq0MOgo2Yq2EDGcBFv9RauaFGYcluTZy5e+VaL7KFGtzPYVFXsd+LRKRkvbtblyFT7aqB gaCyI6b/273X0OAQ== From: Fabiano Rosas To: qemu-devel@nongnu.org Cc: Peter Xu , Richard Henderson Subject: [PULL 20/28] migration: Cleanup incoming migration setup state change Date: Fri, 21 Jun 2024 14:54:26 -0300 Message-Id: <20240621175434.31180-21-farosas@suse.de> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20240621175434.31180-1-farosas@suse.de> References: <20240621175434.31180-1-farosas@suse.de> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Spam-Score: -2.80 X-Spamd-Result: default: False [-2.80 / 50.00]; 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charset="utf-8" From: Peter Xu Destination QEMU can setup incoming ports for two purposes: either a fresh new incoming migration, in which QEMU will switch to SETUP for channel establishment, or a paused postcopy migration, in which QEMU will stay in POSTCOPY_PAUSED until kicking off the RECOVER phase. Now the state machine worked on dest node for the latter, only because migrate_set_state() implicitly will become a noop if the current state check failed. It wasn't clear at all. Clean it up by providing a helper migration_incoming_state_setup() doing proper checks over current status. Postcopy-paused will be explicitly checked now, and then we can bail out for unknown states. Reviewed-by: Fabiano Rosas Signed-off-by: Peter Xu Signed-off-by: Fabiano Rosas --- migration/migration.c | 28 ++++++++++++++++++++++++++-- 1 file changed, 26 insertions(+), 2 deletions(-) diff --git a/migration/migration.c b/migration/migration.c index 795b30f0d0..41a88fc50a 100644 --- a/migration/migration.c +++ b/migration/migration.c @@ -618,6 +618,29 @@ bool migrate_uri_parse(const char *uri, MigrationChann= el **channel, return true; } =20 +static bool +migration_incoming_state_setup(MigrationIncomingState *mis, Error **errp) +{ + MigrationStatus current =3D mis->state; + + if (current =3D=3D MIGRATION_STATUS_POSTCOPY_PAUSED) { + /* + * Incoming postcopy migration will stay in PAUSED state even if + * reconnection happened. + */ + return true; + } + + if (current !=3D MIGRATION_STATUS_NONE) { + error_setg(errp, "Illegal migration incoming state: %s", + MigrationStatus_str(current)); + return false; + } + + migrate_set_state(&mis->state, current, MIGRATION_STATUS_SETUP); + return true; +} + static void qemu_start_incoming_migration(const char *uri, bool has_channe= ls, MigrationChannelList *channels, Error **errp) @@ -656,8 +679,9 @@ static void qemu_start_incoming_migration(const char *u= ri, bool has_channels, return; } =20 - migrate_set_state(&mis->state, MIGRATION_STATUS_NONE, - MIGRATION_STATUS_SETUP); + if (!migration_incoming_state_setup(mis, errp)) { + return; + } =20 if (addr->transport =3D=3D MIGRATION_ADDRESS_TYPE_SOCKET) { SocketAddress *saddr =3D &addr->u.socket; --=20 2.35.3