Currently FdMigrationState doesn't support read(), and this patch introduces it to get response from the other side.
Signed-off-by: Yoshiaki Tamura <tamura.yoshi...@lab.ntt.co.jp> --- migration-tcp.c | 15 +++++++++++++++ migration.c | 13 +++++++++++++ migration.h | 3 +++ 3 files changed, 31 insertions(+), 0 deletions(-) diff --git a/migration-tcp.c b/migration-tcp.c index b55f419..55777c8 100644 --- a/migration-tcp.c +++ b/migration-tcp.c @@ -39,6 +39,20 @@ static int socket_write(FdMigrationState *s, const void * buf, size_t size) return send(s->fd, buf, size, 0); } +static int socket_read(FdMigrationState *s, const void * buf, size_t size) +{ + ssize_t len; + + do { + len = recv(s->fd, (void *)buf, size, 0); + } while (len == -1 && socket_error() == EINTR); + if (len == -1) { + len = -socket_error(); + } + + return len; +} + static int tcp_close(FdMigrationState *s) { DPRINTF("tcp_close\n"); @@ -94,6 +108,7 @@ MigrationState *tcp_start_outgoing_migration(Monitor *mon, s->get_error = socket_errno; s->write = socket_write; + s->read = socket_read; s->close = tcp_close; s->mig_state.cancel = migrate_fd_cancel; s->mig_state.get_status = migrate_fd_get_status; diff --git a/migration.c b/migration.c index d593b1d..bee20f0 100644 --- a/migration.c +++ b/migration.c @@ -334,6 +334,19 @@ ssize_t migrate_fd_put_buffer(void *opaque, const void *data, size_t size) return ret; } +int migrate_fd_get_buffer(void *opaque, uint8_t *data, int64_t pos, size_t size) +{ + FdMigrationState *s = opaque; + int ret; + + ret = s->read(s, data, size); + if (ret == -1) { + ret = -(s->get_error(s)); + } + + return ret; +} + void migrate_fd_connect(FdMigrationState *s) { int ret; diff --git a/migration.h b/migration.h index d13ed4f..7bf6747 100644 --- a/migration.h +++ b/migration.h @@ -47,6 +47,7 @@ struct FdMigrationState int (*get_error)(struct FdMigrationState*); int (*close)(struct FdMigrationState*); int (*write)(struct FdMigrationState*, const void *, size_t); + int (*read)(struct FdMigrationState *, const void *, size_t); void *opaque; }; @@ -115,6 +116,8 @@ void migrate_fd_put_notify(void *opaque); ssize_t migrate_fd_put_buffer(void *opaque, const void *data, size_t size); +int migrate_fd_get_buffer(void *opaque, uint8_t *data, int64_t pos, size_t size); + void migrate_fd_connect(FdMigrationState *s); void migrate_fd_put_ready(void *opaque); -- 1.7.1.2