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bh=hiOZn/0SGsaBNGZym4JYSsMAjWTNHRwz1UJFWPBbByc=; b=TIVhyjDNOOp1J0jPik/OR8YqQpB6k/F475saHIS0bpDPiSHipTY1eQkf9GyDCpS2Aw4ga8 CYW94UIsb0+lK1r50EPGQnYnC9DyKxCv88V3K1j4YD+8GG7rJ899aVbAW2wmSJk8/JGHTA jRbrdRr4c4WuQsOXpCC9I+/dMh38Nqc= X-MC-Unique: 8LAEqHThN_aZH9qf80PU9A-1 From: Kevin Wolf To: qemu-block@nongnu.org Subject: [PATCH 10/29] nbd: Remove NBDExport.close callback Date: Mon, 7 Sep 2020 20:19:52 +0200 Message-Id: <20200907182011.521007-11-kwolf@redhat.com> In-Reply-To: <20200907182011.521007-1-kwolf@redhat.com> References: <20200907182011.521007-1-kwolf@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=kwolf@redhat.com X-Mimecast-Spam-Score: 0.002 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; 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charset="utf-8" The export close callback is unused by the built-in NBD server. qemu-nbd uses it only during shutdown to wait for the unrefed export to actually go away. It can just use nbd_export_close_all() instead and do without the callback. This removes the close callback from nbd_export_new() and makes both callers of it more similar. Signed-off-by: Kevin Wolf Reviewed-by: Max Reitz Reviewed-by: Eric Blake --- include/block/nbd.h | 3 +-- blockdev-nbd.c | 2 +- nbd/server.c | 9 +-------- qemu-nbd.c | 14 ++++---------- 4 files changed, 7 insertions(+), 21 deletions(-) diff --git a/include/block/nbd.h b/include/block/nbd.h index acccdb3180..9449b3dac4 100644 --- a/include/block/nbd.h +++ b/include/block/nbd.h @@ -334,8 +334,7 @@ BlockExport *nbd_export_create(BlockExportOptions *exp_= args, Error **errp); NBDExport *nbd_export_new(BlockDriverState *bs, const char *name, const char *desc, const char *bitmap, bool readonly, bool shared, - void (*close)(NBDExport *), bool writethrough, - Error **errp); + bool writethrough, Error **errp); void nbd_export_set_on_eject_blk(BlockExport *exp, BlockBackend *blk); void nbd_export_close(NBDExport *exp); void nbd_export_remove(NBDExport *exp, NbdServerRemoveMode mode, Error **e= rrp); diff --git a/blockdev-nbd.c b/blockdev-nbd.c index 09247a8ded..3a51b3e792 100644 --- a/blockdev-nbd.c +++ b/blockdev-nbd.c @@ -222,7 +222,7 @@ BlockExport *nbd_export_create(BlockExportOptions *exp_= args, Error **errp) =20 exp =3D nbd_export_new(bs, arg->name, arg->description, arg->bitmap, !arg->writable, !arg->writable, - NULL, exp_args->writethrough, errp); + exp_args->writethrough, errp); if (!exp) { goto out; } diff --git a/nbd/server.c b/nbd/server.c index 23d9a53094..1cc915f01d 100644 --- a/nbd/server.c +++ b/nbd/server.c @@ -84,7 +84,6 @@ struct NBDRequestData { struct NBDExport { BlockExport common; int refcount; - void (*close)(NBDExport *exp); =20 BlockBackend *blk; char *name; @@ -1521,8 +1520,7 @@ void nbd_export_set_on_eject_blk(BlockExport *exp, Bl= ockBackend *blk) NBDExport *nbd_export_new(BlockDriverState *bs, const char *name, const char *desc, const char *bitmap, bool readonly, bool shared, - void (*close)(NBDExport *), bool writethrough, - Error **errp) + bool writethrough, Error **errp) { AioContext *ctx; BlockBackend *blk; @@ -1625,7 +1623,6 @@ NBDExport *nbd_export_new(BlockDriverState *bs, assert(strlen(exp->export_bitmap_context) < NBD_MAX_STRING_SIZE); } =20 - exp->close =3D close; exp->ctx =3D ctx; blk_add_aio_context_notifier(blk, blk_aio_attached, blk_aio_detach, ex= p); =20 @@ -1723,10 +1720,6 @@ void nbd_export_put(NBDExport *exp) assert(exp->name =3D=3D NULL); assert(exp->description =3D=3D NULL); =20 - if (exp->close) { - exp->close(exp); - } - if (exp->blk) { if (exp->eject_notifier_blk) { notifier_remove(&exp->eject_notifier); diff --git a/qemu-nbd.c b/qemu-nbd.c index 2bba6c0db3..cab65529a5 100644 --- a/qemu-nbd.c +++ b/qemu-nbd.c @@ -70,7 +70,7 @@ static int verbose; static char *srcpath; static SocketAddress *saddr; static int persistent =3D 0; -static enum { RUNNING, TERMINATE, TERMINATING, TERMINATED } state; +static enum { RUNNING, TERMINATE, TERMINATED } state; static int shared =3D 1; static int nb_fds; static QIONetListener *server; @@ -332,12 +332,6 @@ static int nbd_can_accept(void) return state =3D=3D RUNNING && nb_fds < shared; } =20 -static void nbd_export_closed(NBDExport *export) -{ - assert(state =3D=3D TERMINATING); - state =3D TERMINATED; -} - static void nbd_update_server_watch(void); =20 static void nbd_client_closed(NBDClient *client, bool negotiated) @@ -1067,7 +1061,7 @@ int main(int argc, char **argv) =20 export =3D nbd_export_new(bs, export_name, export_description, bitmap, readonly, shared >= 1, - nbd_export_closed, writethrough, &error_fatal); + writethrough, &error_fatal); =20 if (device) { #if HAVE_NBD_DEVICE @@ -1107,10 +1101,10 @@ int main(int argc, char **argv) do { main_loop_wait(false); if (state =3D=3D TERMINATE) { - state =3D TERMINATING; - nbd_export_close(export); nbd_export_put(export); + nbd_export_close_all(); export =3D NULL; + state =3D TERMINATED; } } while (state !=3D TERMINATED); =20 --=20 2.25.4