diff options
author | 2016-06-03 03:33:22 +0000 | |
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committer | 2016-06-03 03:33:23 +0000 | |
commit | da27230f80795d0028333713f036d44c53cb0e68 (patch) | |
tree | b3d379eaf000adf72b36cb01cdf4d79c3e3f064c /qemu/block/nbd-client.c | |
parent | 0e68cb048bb8aadb14675f5d4286d8ab2fc35449 (diff) | |
parent | 437fd90c0250dee670290f9b714253671a990160 (diff) |
Merge "These changes are the raw update to qemu-2.6."
Diffstat (limited to 'qemu/block/nbd-client.c')
-rw-r--r-- | qemu/block/nbd-client.c | 113 |
1 files changed, 71 insertions, 42 deletions
diff --git a/qemu/block/nbd-client.c b/qemu/block/nbd-client.c index e1bb9198c..878e879ac 100644 --- a/qemu/block/nbd-client.c +++ b/qemu/block/nbd-client.c @@ -26,8 +26,8 @@ * THE SOFTWARE. */ +#include "qemu/osdep.h" #include "nbd-client.h" -#include "qemu/sockets.h" #define HANDLE_TO_INDEX(bs, handle) ((handle) ^ ((uint64_t)(intptr_t)bs)) #define INDEX_TO_HANDLE(bs, index) ((index) ^ ((uint64_t)(intptr_t)bs)) @@ -47,13 +47,21 @@ static void nbd_teardown_connection(BlockDriverState *bs) { NbdClientSession *client = nbd_get_client_session(bs); + if (!client->ioc) { /* Already closed */ + return; + } + /* finish any pending coroutines */ - shutdown(client->sock, 2); + qio_channel_shutdown(client->ioc, + QIO_CHANNEL_SHUTDOWN_BOTH, + NULL); nbd_recv_coroutines_enter_all(client); nbd_client_detach_aio_context(bs); - closesocket(client->sock); - client->sock = -1; + object_unref(OBJECT(client->sioc)); + client->sioc = NULL; + object_unref(OBJECT(client->ioc)); + client->ioc = NULL; } static void nbd_reply_ready(void *opaque) @@ -63,12 +71,16 @@ static void nbd_reply_ready(void *opaque) uint64_t i; int ret; + if (!s->ioc) { /* Already closed */ + return; + } + if (s->reply.handle == 0) { /* No reply already in flight. Fetch a header. It is possible * that another thread has done the same thing in parallel, so * the socket is not readable anymore. */ - ret = nbd_receive_reply(s->sock, &s->reply); + ret = nbd_receive_reply(s->ioc, &s->reply); if (ret == -EAGAIN) { return; } @@ -119,32 +131,36 @@ static int nbd_co_send_request(BlockDriverState *bs, } } + g_assert(qemu_in_coroutine()); assert(i < MAX_NBD_REQUESTS); request->handle = INDEX_TO_HANDLE(s, i); + + if (!s->ioc) { + qemu_co_mutex_unlock(&s->send_mutex); + return -EPIPE; + } + s->send_coroutine = qemu_coroutine_self(); aio_context = bdrv_get_aio_context(bs); - aio_set_fd_handler(aio_context, s->sock, + aio_set_fd_handler(aio_context, s->sioc->fd, false, nbd_reply_ready, nbd_restart_write, bs); if (qiov) { - if (!s->is_unix) { - socket_set_cork(s->sock, 1); - } - rc = nbd_send_request(s->sock, request); + qio_channel_set_cork(s->ioc, true); + rc = nbd_send_request(s->ioc, request); if (rc >= 0) { - ret = qemu_co_sendv(s->sock, qiov->iov, qiov->niov, - offset, request->len); + ret = nbd_wr_syncv(s->ioc, qiov->iov, qiov->niov, + offset, request->len, 0); if (ret != request->len) { rc = -EIO; } } - if (!s->is_unix) { - socket_set_cork(s->sock, 0); - } + qio_channel_set_cork(s->ioc, false); } else { - rc = nbd_send_request(s->sock, request); + rc = nbd_send_request(s->ioc, request); } - aio_set_fd_handler(aio_context, s->sock, nbd_reply_ready, NULL, bs); + aio_set_fd_handler(aio_context, s->sioc->fd, false, + nbd_reply_ready, NULL, bs); s->send_coroutine = NULL; qemu_co_mutex_unlock(&s->send_mutex); return rc; @@ -160,12 +176,13 @@ static void nbd_co_receive_reply(NbdClientSession *s, * peek at the next reply and avoid yielding if it's ours? */ qemu_coroutine_yield(); *reply = s->reply; - if (reply->handle != request->handle) { + if (reply->handle != request->handle || + !s->ioc) { reply->error = EIO; } else { if (qiov && reply->error == 0) { - ret = qemu_co_recvv(s->sock, qiov->iov, qiov->niov, - offset, request->len); + ret = nbd_wr_syncv(s->ioc, qiov->iov, qiov->niov, + offset, request->len, 1); if (ret != request->len) { reply->error = EIO; } @@ -226,15 +243,15 @@ static int nbd_co_readv_1(BlockDriverState *bs, int64_t sector_num, static int nbd_co_writev_1(BlockDriverState *bs, int64_t sector_num, int nb_sectors, QEMUIOVector *qiov, - int offset) + int offset, int *flags) { NbdClientSession *client = nbd_get_client_session(bs); struct nbd_request request = { .type = NBD_CMD_WRITE }; struct nbd_reply reply; ssize_t ret; - if (!bdrv_enable_write_cache(bs) && - (client->nbdflags & NBD_FLAG_SEND_FUA)) { + if ((*flags & BDRV_REQ_FUA) && (client->nbdflags & NBD_FLAG_SEND_FUA)) { + *flags &= ~BDRV_REQ_FUA; request.type |= NBD_CMD_FLAG_FUA; } @@ -274,12 +291,13 @@ int nbd_client_co_readv(BlockDriverState *bs, int64_t sector_num, } int nbd_client_co_writev(BlockDriverState *bs, int64_t sector_num, - int nb_sectors, QEMUIOVector *qiov) + int nb_sectors, QEMUIOVector *qiov, int *flags) { int offset = 0; int ret; while (nb_sectors > NBD_MAX_SECTORS) { - ret = nbd_co_writev_1(bs, sector_num, NBD_MAX_SECTORS, qiov, offset); + ret = nbd_co_writev_1(bs, sector_num, NBD_MAX_SECTORS, qiov, offset, + flags); if (ret < 0) { return ret; } @@ -287,7 +305,7 @@ int nbd_client_co_writev(BlockDriverState *bs, int64_t sector_num, sector_num += NBD_MAX_SECTORS; nb_sectors -= NBD_MAX_SECTORS; } - return nbd_co_writev_1(bs, sector_num, nb_sectors, qiov, offset); + return nbd_co_writev_1(bs, sector_num, nb_sectors, qiov, offset, flags); } int nbd_client_co_flush(BlockDriverState *bs) @@ -301,10 +319,6 @@ int nbd_client_co_flush(BlockDriverState *bs) return 0; } - if (client->nbdflags & NBD_FLAG_SEND_FUA) { - request.type |= NBD_CMD_FLAG_FUA; - } - request.from = 0; request.len = 0; @@ -348,14 +362,15 @@ int nbd_client_co_discard(BlockDriverState *bs, int64_t sector_num, void nbd_client_detach_aio_context(BlockDriverState *bs) { aio_set_fd_handler(bdrv_get_aio_context(bs), - nbd_get_client_session(bs)->sock, NULL, NULL, NULL); + nbd_get_client_session(bs)->sioc->fd, + false, NULL, NULL, NULL); } void nbd_client_attach_aio_context(BlockDriverState *bs, AioContext *new_context) { - aio_set_fd_handler(new_context, nbd_get_client_session(bs)->sock, - nbd_reply_ready, NULL, bs); + aio_set_fd_handler(new_context, nbd_get_client_session(bs)->sioc->fd, + false, nbd_reply_ready, NULL, bs); } void nbd_client_close(BlockDriverState *bs) @@ -367,16 +382,20 @@ void nbd_client_close(BlockDriverState *bs) .len = 0 }; - if (client->sock == -1) { + if (client->ioc == NULL) { return; } - nbd_send_request(client->sock, &request); + nbd_send_request(client->ioc, &request); nbd_teardown_connection(bs); } -int nbd_client_init(BlockDriverState *bs, int sock, const char *export, +int nbd_client_init(BlockDriverState *bs, + QIOChannelSocket *sioc, + const char *export, + QCryptoTLSCreds *tlscreds, + const char *hostname, Error **errp) { NbdClientSession *client = nbd_get_client_session(bs); @@ -384,22 +403,32 @@ int nbd_client_init(BlockDriverState *bs, int sock, const char *export, /* NBD handshake */ logout("session init %s\n", export); - qemu_set_block(sock); - ret = nbd_receive_negotiate(sock, export, - &client->nbdflags, &client->size, errp); + qio_channel_set_blocking(QIO_CHANNEL(sioc), true, NULL); + + ret = nbd_receive_negotiate(QIO_CHANNEL(sioc), export, + &client->nbdflags, + tlscreds, hostname, + &client->ioc, + &client->size, errp); if (ret < 0) { logout("Failed to negotiate with the NBD server\n"); - closesocket(sock); return ret; } qemu_co_mutex_init(&client->send_mutex); qemu_co_mutex_init(&client->free_sema); - client->sock = sock; + client->sioc = sioc; + object_ref(OBJECT(client->sioc)); + + if (!client->ioc) { + client->ioc = QIO_CHANNEL(sioc); + object_ref(OBJECT(client->ioc)); + } /* Now that we're connected, set the socket to be non-blocking and * kick the reply mechanism. */ - qemu_set_nonblock(sock); + qio_channel_set_blocking(QIO_CHANNEL(sioc), false, NULL); + nbd_client_attach_aio_context(bs, bdrv_get_aio_context(bs)); logout("Established connection with NBD server\n"); |