From c7fc8d323ad1a3110925088096376eca4163be71 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= Date: Mon, 20 Jun 2022 12:01:48 +0100 Subject: migration: rename rate limiting fields in QEMUFile MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This renames the following QEMUFile fields * bytes_xfer -> rate_limit_used * xfer_limit -> rate_limit_max The intent is to make it clear that 'bytes_xfer' is specifically related to rate limiting of data and applies to data queued, which need not have been transferred on the wire yet if a flush hasn't taken place. Reviewed-by: Dr. David Alan Gilbert Signed-off-by: Daniel P. Berrangé Reviewed-by: Juan Quintela Signed-off-by: Juan Quintela Signed-off-by: Dr. David Alan Gilbert --- migration/qemu-file.c | 30 +++++++++++++++++++----------- 1 file changed, 19 insertions(+), 11 deletions(-) (limited to 'migration/qemu-file.c') diff --git a/migration/qemu-file.c b/migration/qemu-file.c index 1479cddad9..03f0b13a55 100644 --- a/migration/qemu-file.c +++ b/migration/qemu-file.c @@ -39,8 +39,16 @@ struct QEMUFile { const QEMUFileHooks *hooks; void *opaque; - int64_t bytes_xfer; - int64_t xfer_limit; + /* + * Maximum amount of data in bytes to transfer during one + * rate limiting time window + */ + int64_t rate_limit_max; + /* + * Total amount of data in bytes queued for transfer + * during this rate limiting time window + */ + int64_t rate_limit_used; int64_t pos; /* start of buffer when writing, end of buffer when reading */ @@ -304,7 +312,7 @@ size_t ram_control_save_page(QEMUFile *f, ram_addr_t block_offset, int ret = f->hooks->save_page(f, f->opaque, block_offset, offset, size, bytes_sent); if (ret != RAM_SAVE_CONTROL_NOT_SUPP) { - f->bytes_xfer += size; + f->rate_limit_used += size; } if (ret != RAM_SAVE_CONTROL_DELAYED && @@ -457,7 +465,7 @@ void qemu_put_buffer_async(QEMUFile *f, const uint8_t *buf, size_t size, return; } - f->bytes_xfer += size; + f->rate_limit_used += size; add_to_iovec(f, buf, size, may_free); } @@ -475,7 +483,7 @@ void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, size_t size) l = size; } memcpy(f->buf + f->buf_index, buf, l); - f->bytes_xfer += l; + f->rate_limit_used += l; add_buf_to_iovec(f, l); if (qemu_file_get_error(f)) { break; @@ -492,7 +500,7 @@ void qemu_put_byte(QEMUFile *f, int v) } f->buf[f->buf_index] = v; - f->bytes_xfer++; + f->rate_limit_used++; add_buf_to_iovec(f, 1); } @@ -674,7 +682,7 @@ int qemu_file_rate_limit(QEMUFile *f) if (qemu_file_get_error(f)) { return 1; } - if (f->xfer_limit > 0 && f->bytes_xfer > f->xfer_limit) { + if (f->rate_limit_max > 0 && f->rate_limit_used > f->rate_limit_max) { return 1; } return 0; @@ -682,22 +690,22 @@ int qemu_file_rate_limit(QEMUFile *f) int64_t qemu_file_get_rate_limit(QEMUFile *f) { - return f->xfer_limit; + return f->rate_limit_max; } void qemu_file_set_rate_limit(QEMUFile *f, int64_t limit) { - f->xfer_limit = limit; + f->rate_limit_max = limit; } void qemu_file_reset_rate_limit(QEMUFile *f) { - f->bytes_xfer = 0; + f->rate_limit_used = 0; } void qemu_file_update_transfer(QEMUFile *f, int64_t len) { - f->bytes_xfer += len; + f->rate_limit_used += len; } void qemu_put_be16(QEMUFile *f, unsigned int v) -- cgit v1.2.3 From 154d87b4ef7f32fe4b11357648ec0b81b7e77d59 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= Date: Mon, 20 Jun 2022 12:01:49 +0100 Subject: migration: rename 'pos' field in QEMUFile to 'bytes_processed' MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The field name 'pos' gives the misleading impression that the QEMUFile objects are seekable. This is not the case, as in general we just have an opaque stream. The users of this method are only interested in the total bytes processed. This switches to a new name that reflects the intended usage. Every QIOChannel backed impl of QEMUFile is currently ignoring the 'pos' field. The only QEMUFile impl using 'pos' as an offset for I/O is the block device vmstate. A later patch is introducing a QIOChannel impl for the vmstate, and to handle this it is tracking a file offset itself internally to the QIOChannel impl. So when we later eliminate the QEMUFileOps callbacks later, the 'pos' field will no longer be used from any I/O read/write methods. Reviewed-by: Dr. David Alan Gilbert Signed-off-by: Daniel P. Berrangé Reviewed-by: Juan Quintela Signed-off-by: Juan Quintela Signed-off-by: Dr. David Alan Gilbert dgilbert: Fixed long line --- migration/qemu-file.c | 21 +++++++++++---------- 1 file changed, 11 insertions(+), 10 deletions(-) (limited to 'migration/qemu-file.c') diff --git a/migration/qemu-file.c b/migration/qemu-file.c index 03f0b13a55..eabc2d7c6e 100644 --- a/migration/qemu-file.c +++ b/migration/qemu-file.c @@ -50,8 +50,9 @@ struct QEMUFile { */ int64_t rate_limit_used; - int64_t pos; /* start of buffer when writing, end of buffer - when reading */ + /* The sum of bytes transferred on the wire */ + int64_t total_transferred; + int buf_index; int buf_size; /* 0 when writing */ uint8_t buf[IO_BUF_SIZE]; @@ -241,14 +242,14 @@ void qemu_fflush(QEMUFile *f) } if (f->iovcnt > 0) { expect = iov_size(f->iov, f->iovcnt); - ret = f->ops->writev_buffer(f->opaque, f->iov, f->iovcnt, f->pos, - &local_error); + ret = f->ops->writev_buffer(f->opaque, f->iov, f->iovcnt, + f->total_transferred, &local_error); qemu_iovec_release_ram(f); } if (ret >= 0) { - f->pos += ret; + f->total_transferred += ret; } /* We expect the QEMUFile write impl to send the full * data set we requested, so sanity check that. @@ -357,11 +358,11 @@ static ssize_t qemu_fill_buffer(QEMUFile *f) return 0; } - len = f->ops->get_buffer(f->opaque, f->buf + pending, f->pos, + len = f->ops->get_buffer(f->opaque, f->buf + pending, f->total_transferred, IO_BUF_SIZE - pending, &local_error); if (len > 0) { f->buf_size += len; - f->pos += len; + f->total_transferred += len; } else if (len == 0) { qemu_file_set_error_obj(f, -EIO, local_error); } else if (len != -EAGAIN) { @@ -375,7 +376,7 @@ static ssize_t qemu_fill_buffer(QEMUFile *f) void qemu_update_position(QEMUFile *f, size_t size) { - f->pos += size; + f->total_transferred += size; } /** Closes the file @@ -658,7 +659,7 @@ int qemu_get_byte(QEMUFile *f) int64_t qemu_ftell_fast(QEMUFile *f) { - int64_t ret = f->pos; + int64_t ret = f->total_transferred; int i; for (i = 0; i < f->iovcnt; i++) { @@ -671,7 +672,7 @@ int64_t qemu_ftell_fast(QEMUFile *f) int64_t qemu_ftell(QEMUFile *f) { qemu_fflush(f); - return f->pos; + return f->total_transferred; } int qemu_file_rate_limit(QEMUFile *f) -- cgit v1.2.3 From fbfa6404e597920ad72510461e0b0fed5243ce1d Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= Date: Mon, 20 Jun 2022 12:01:50 +0100 Subject: migration: rename qemu_ftell to qemu_file_total_transferred MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The name 'ftell' gives the misleading impression that the QEMUFile objects are seekable. This is not the case, as in general we just have an opaque stream. The users of this method are only interested in the total bytes processed. This switches to a new name that reflects the intended usage. Reviewed-by: Dr. David Alan Gilbert Signed-off-by: Daniel P. Berrangé Reviewed-by: Juan Quintela Signed-off-by: Juan Quintela Signed-off-by: Dr. David Alan Gilbert dgilbert: Wrapped long line --- migration/qemu-file.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'migration/qemu-file.c') diff --git a/migration/qemu-file.c b/migration/qemu-file.c index eabc2d7c6e..7ee9b5bf05 100644 --- a/migration/qemu-file.c +++ b/migration/qemu-file.c @@ -657,7 +657,7 @@ int qemu_get_byte(QEMUFile *f) return result; } -int64_t qemu_ftell_fast(QEMUFile *f) +int64_t qemu_file_total_transferred_fast(QEMUFile *f) { int64_t ret = f->total_transferred; int i; @@ -669,7 +669,7 @@ int64_t qemu_ftell_fast(QEMUFile *f) return ret; } -int64_t qemu_ftell(QEMUFile *f) +int64_t qemu_file_total_transferred(QEMUFile *f) { qemu_fflush(f); return f->total_transferred; -- cgit v1.2.3 From 1a93bd2f60acbf7eb3583805f9d6605d909d403f Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= Date: Mon, 20 Jun 2022 12:01:51 +0100 Subject: migration: rename qemu_update_position to qemu_file_credit_transfer MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The qemu_update_position method name gives the misleading impression that it is changing the current file offset. Most of the files are just streams, however, so there's no concept of a file offset in the general case. What this method is actually used for is to report on the number of bytes that have been transferred out of band from the main I/O methods. This new name better reflects this purpose. Reviewed-by: Dr. David Alan Gilbert Signed-off-by: Daniel P. Berrangé Reviewed-by: Juan Quintela Signed-off-by: Juan Quintela Signed-off-by: Dr. David Alan Gilbert --- migration/qemu-file.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'migration/qemu-file.c') diff --git a/migration/qemu-file.c b/migration/qemu-file.c index 7ee9b5bf05..f73b010d39 100644 --- a/migration/qemu-file.c +++ b/migration/qemu-file.c @@ -319,7 +319,7 @@ size_t ram_control_save_page(QEMUFile *f, ram_addr_t block_offset, if (ret != RAM_SAVE_CONTROL_DELAYED && ret != RAM_SAVE_CONTROL_NOT_SUPP) { if (bytes_sent && *bytes_sent > 0) { - qemu_update_position(f, *bytes_sent); + qemu_file_credit_transfer(f, *bytes_sent); } else if (ret < 0) { qemu_file_set_error(f, ret); } @@ -374,7 +374,7 @@ static ssize_t qemu_fill_buffer(QEMUFile *f) return len; } -void qemu_update_position(QEMUFile *f, size_t size) +void qemu_file_credit_transfer(QEMUFile *f, size_t size) { f->total_transferred += size; } -- cgit v1.2.3 From bc698c367d6fac15454ee3ff6bb168e43c151465 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= Date: Mon, 20 Jun 2022 12:01:52 +0100 Subject: migration: rename qemu_file_update_transfer to qemu_file_acct_rate_limit MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The qemu_file_update_transfer name doesn't give a clear guide on what its purpose is, and how it differs from the qemu_file_credit_transfer method. The latter is specifically for accumulating for total migration traffic, while the former is specifically for accounting in thue rate limit calculations. The new name give better guidance on its usage. Signed-off-by: Daniel P. Berrangé Reviewed-by: Dr. David Alan Gilbert Reviewed-by: Juan Quintela Signed-off-by: Juan Quintela Signed-off-by: Dr. David Alan Gilbert --- migration/qemu-file.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'migration/qemu-file.c') diff --git a/migration/qemu-file.c b/migration/qemu-file.c index f73b010d39..7fe0d9fa30 100644 --- a/migration/qemu-file.c +++ b/migration/qemu-file.c @@ -704,7 +704,7 @@ void qemu_file_reset_rate_limit(QEMUFile *f) f->rate_limit_used = 0; } -void qemu_file_update_transfer(QEMUFile *f, int64_t len) +void qemu_file_acct_rate_limit(QEMUFile *f, int64_t len) { f->rate_limit_used += len; } -- cgit v1.2.3 From 365c0463db9382130c7201c5c91021fe84bf5f77 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= Date: Mon, 20 Jun 2022 12:01:55 +0100 Subject: migration: stop passing 'opaque' parameter to QEMUFile hooks MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The only user of the hooks is RDMA which provides a QIOChannel backed impl of QEMUFile. It can thus use the qemu_file_get_ioc() method. Reviewed-by: Dr. David Alan Gilbert Signed-off-by: Daniel P. Berrangé Reviewed-by: Juan Quintela Signed-off-by: Juan Quintela Signed-off-by: Dr. David Alan Gilbert --- migration/qemu-file.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'migration/qemu-file.c') diff --git a/migration/qemu-file.c b/migration/qemu-file.c index 7fe0d9fa30..cdcb6e1788 100644 --- a/migration/qemu-file.c +++ b/migration/qemu-file.c @@ -266,7 +266,7 @@ void ram_control_before_iterate(QEMUFile *f, uint64_t flags) int ret = 0; if (f->hooks && f->hooks->before_ram_iterate) { - ret = f->hooks->before_ram_iterate(f, f->opaque, flags, NULL); + ret = f->hooks->before_ram_iterate(f, flags, NULL); if (ret < 0) { qemu_file_set_error(f, ret); } @@ -278,7 +278,7 @@ void ram_control_after_iterate(QEMUFile *f, uint64_t flags) int ret = 0; if (f->hooks && f->hooks->after_ram_iterate) { - ret = f->hooks->after_ram_iterate(f, f->opaque, flags, NULL); + ret = f->hooks->after_ram_iterate(f, flags, NULL); if (ret < 0) { qemu_file_set_error(f, ret); } @@ -290,7 +290,7 @@ void ram_control_load_hook(QEMUFile *f, uint64_t flags, void *data) int ret = -EINVAL; if (f->hooks && f->hooks->hook_ram_load) { - ret = f->hooks->hook_ram_load(f, f->opaque, flags, data); + ret = f->hooks->hook_ram_load(f, flags, data); if (ret < 0) { qemu_file_set_error(f, ret); } @@ -310,7 +310,7 @@ size_t ram_control_save_page(QEMUFile *f, ram_addr_t block_offset, uint64_t *bytes_sent) { if (f->hooks && f->hooks->save_page) { - int ret = f->hooks->save_page(f, f->opaque, block_offset, + int ret = f->hooks->save_page(f, block_offset, offset, size, bytes_sent); if (ret != RAM_SAVE_CONTROL_NOT_SUPP) { f->rate_limit_used += size; -- cgit v1.2.3 From 2893a2884b1deb09af51f4377f1aaf29b28b0c93 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= Date: Mon, 20 Jun 2022 12:01:56 +0100 Subject: migration: hardcode assumption that QEMUFile is backed with QIOChannel MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The only callers of qemu_fopen_ops pass 'true' for the 'has_ioc' parameter, so hardcode this assumption in QEMUFile, by passing in the QIOChannel object as a non-opaque parameter. Reviewed-by: Dr. David Alan Gilbert Signed-off-by: Daniel P. Berrangé Reviewed-by: Juan Quintela Signed-off-by: Juan Quintela Signed-off-by: Dr. David Alan Gilbert dgilbert: Fixed long line --- migration/qemu-file.c | 35 +++++++++++++++++------------------ 1 file changed, 17 insertions(+), 18 deletions(-) (limited to 'migration/qemu-file.c') diff --git a/migration/qemu-file.c b/migration/qemu-file.c index cdcb6e1788..30e2160041 100644 --- a/migration/qemu-file.c +++ b/migration/qemu-file.c @@ -37,7 +37,7 @@ struct QEMUFile { const QEMUFileOps *ops; const QEMUFileHooks *hooks; - void *opaque; + QIOChannel *ioc; /* * Maximum amount of data in bytes to transfer during one @@ -65,8 +65,6 @@ struct QEMUFile { Error *last_error_obj; /* has the file has been shutdown */ bool shutdown; - /* Whether opaque points to a QIOChannel */ - bool has_ioc; }; /* @@ -81,7 +79,7 @@ int qemu_file_shutdown(QEMUFile *f) if (!f->ops->shut_down) { return -ENOSYS; } - ret = f->ops->shut_down(f->opaque, true, true, NULL); + ret = f->ops->shut_down(f->ioc, true, true, NULL); if (!f->last_error) { qemu_file_set_error(f, -EIO); @@ -98,7 +96,7 @@ QEMUFile *qemu_file_get_return_path(QEMUFile *f) if (!f->ops->get_return_path) { return NULL; } - return f->ops->get_return_path(f->opaque); + return f->ops->get_return_path(f->ioc); } bool qemu_file_mode_is_not_valid(const char *mode) @@ -113,15 +111,15 @@ bool qemu_file_mode_is_not_valid(const char *mode) return false; } -QEMUFile *qemu_fopen_ops(void *opaque, const QEMUFileOps *ops, bool has_ioc) +QEMUFile *qemu_fopen_ops(QIOChannel *ioc, const QEMUFileOps *ops) { QEMUFile *f; f = g_new0(QEMUFile, 1); - f->opaque = opaque; + f->ioc = ioc; f->ops = ops; - f->has_ioc = has_ioc; + return f; } @@ -242,7 +240,7 @@ void qemu_fflush(QEMUFile *f) } if (f->iovcnt > 0) { expect = iov_size(f->iov, f->iovcnt); - ret = f->ops->writev_buffer(f->opaque, f->iov, f->iovcnt, + ret = f->ops->writev_buffer(f->ioc, f->iov, f->iovcnt, f->total_transferred, &local_error); qemu_iovec_release_ram(f); @@ -358,7 +356,7 @@ static ssize_t qemu_fill_buffer(QEMUFile *f) return 0; } - len = f->ops->get_buffer(f->opaque, f->buf + pending, f->total_transferred, + len = f->ops->get_buffer(f->ioc, f->buf + pending, f->total_transferred, IO_BUF_SIZE - pending, &local_error); if (len > 0) { f->buf_size += len; @@ -394,7 +392,7 @@ int qemu_fclose(QEMUFile *f) ret = qemu_file_get_error(f); if (f->ops->close) { - int ret2 = f->ops->close(f->opaque, NULL); + int ret2 = f->ops->close(f->ioc, NULL); if (ret >= 0) { ret = ret2; } @@ -861,18 +859,19 @@ void qemu_put_counted_string(QEMUFile *f, const char *str) void qemu_file_set_blocking(QEMUFile *f, bool block) { if (f->ops->set_blocking) { - f->ops->set_blocking(f->opaque, block, NULL); + f->ops->set_blocking(f->ioc, block, NULL); } } /* - * Return the ioc object if it's a migration channel. Note: it can return NULL - * for callers passing in a non-migration qemufile. E.g. see qemu_fopen_bdrv() - * and its usage in e.g. load_snapshot(). So we need to check against NULL - * before using it. If without the check, migration_incoming_state_destroy() - * could fail for load_snapshot(). + * qemu_file_get_ioc: + * + * Get the ioc object for the file, without incrementing + * the reference count. + * + * Returns: the ioc object */ QIOChannel *qemu_file_get_ioc(QEMUFile *file) { - return file->has_ioc ? QIO_CHANNEL(file->opaque) : NULL; + return file->ioc; } -- cgit v1.2.3 From c0c6e1e2dd26ee3ee0218d64be6c532872935070 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= Date: Mon, 20 Jun 2022 12:01:57 +0100 Subject: migration: introduce new constructors for QEMUFile MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Prepare for the elimination of QEMUFileOps by introducing a pair of new constructors. This lets us distinguish between an input and output file object explicitly rather than via the existance of specific callbacks. Reviewed-by: Dr. David Alan Gilbert Signed-off-by: Daniel P. Berrangé Reviewed-by: Juan Quintela Signed-off-by: Juan Quintela Signed-off-by: Dr. David Alan Gilbert --- migration/qemu-file.c | 18 ++++++++++++++++-- 1 file changed, 16 insertions(+), 2 deletions(-) (limited to 'migration/qemu-file.c') diff --git a/migration/qemu-file.c b/migration/qemu-file.c index 30e2160041..2d6ceb53af 100644 --- a/migration/qemu-file.c +++ b/migration/qemu-file.c @@ -38,6 +38,7 @@ struct QEMUFile { const QEMUFileOps *ops; const QEMUFileHooks *hooks; QIOChannel *ioc; + bool is_writable; /* * Maximum amount of data in bytes to transfer during one @@ -111,7 +112,9 @@ bool qemu_file_mode_is_not_valid(const char *mode) return false; } -QEMUFile *qemu_fopen_ops(QIOChannel *ioc, const QEMUFileOps *ops) +static QEMUFile *qemu_file_new_impl(QIOChannel *ioc, + const QEMUFileOps *ops, + bool is_writable) { QEMUFile *f; @@ -119,10 +122,21 @@ QEMUFile *qemu_fopen_ops(QIOChannel *ioc, const QEMUFileOps *ops) f->ioc = ioc; f->ops = ops; + f->is_writable = is_writable; return f; } +QEMUFile *qemu_file_new_output(QIOChannel *ioc, const QEMUFileOps *ops) +{ + return qemu_file_new_impl(ioc, ops, true); +} + +QEMUFile *qemu_file_new_input(QIOChannel *ioc, const QEMUFileOps *ops) +{ + return qemu_file_new_impl(ioc, ops, false); +} + void qemu_file_set_hooks(QEMUFile *f, const QEMUFileHooks *hooks) { @@ -181,7 +195,7 @@ void qemu_file_set_error(QEMUFile *f, int ret) bool qemu_file_is_writable(QEMUFile *f) { - return f->ops->writev_buffer; + return f->is_writable; } static void qemu_iovec_release_ram(QEMUFile *f) -- cgit v1.2.3 From d3c581b750ab099aa8937df5533655b3f9d08ab3 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= Date: Mon, 20 Jun 2022 12:01:59 +0100 Subject: migration: remove the QEMUFileOps 'shut_down' callback MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This directly implements the shutdown logic using QIOChannel APIs. Reviewed-by: Dr. David Alan Gilbert Signed-off-by: Daniel P. Berrangé Reviewed-by: Juan Quintela Signed-off-by: Juan Quintela Signed-off-by: Dr. David Alan Gilbert --- migration/qemu-file.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) (limited to 'migration/qemu-file.c') diff --git a/migration/qemu-file.c b/migration/qemu-file.c index 2d6ceb53af..d71bcb6c9c 100644 --- a/migration/qemu-file.c +++ b/migration/qemu-file.c @@ -71,16 +71,23 @@ struct QEMUFile { /* * Stop a file from being read/written - not all backing files can do this * typically only sockets can. + * + * TODO: convert to propagate Error objects instead of squashing + * to a fixed errno value */ int qemu_file_shutdown(QEMUFile *f) { - int ret; + int ret = 0; f->shutdown = true; - if (!f->ops->shut_down) { + if (!qio_channel_has_feature(f->ioc, + QIO_CHANNEL_FEATURE_SHUTDOWN)) { return -ENOSYS; } - ret = f->ops->shut_down(f->ioc, true, true, NULL); + + if (qio_channel_shutdown(f->ioc, QIO_CHANNEL_SHUTDOWN_BOTH, NULL) < 0) { + ret = -EIO; + } if (!f->last_error) { qemu_file_set_error(f, -EIO); -- cgit v1.2.3 From 80ad97069c3c434a3631f0c8bc0d5c4cee09be6d Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= Date: Mon, 20 Jun 2022 12:02:00 +0100 Subject: migration: remove the QEMUFileOps 'set_blocking' callback MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This directly implements the set_blocking logic using QIOChannel APIs. Reviewed-by: Dr. David Alan Gilbert Signed-off-by: Daniel P. Berrangé Reviewed-by: Juan Quintela Signed-off-by: Juan Quintela Signed-off-by: Dr. David Alan Gilbert --- migration/qemu-file.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) (limited to 'migration/qemu-file.c') diff --git a/migration/qemu-file.c b/migration/qemu-file.c index d71bcb6c9c..95d5db9dd6 100644 --- a/migration/qemu-file.c +++ b/migration/qemu-file.c @@ -879,9 +879,7 @@ void qemu_put_counted_string(QEMUFile *f, const char *str) */ void qemu_file_set_blocking(QEMUFile *f, bool block) { - if (f->ops->set_blocking) { - f->ops->set_blocking(f->ioc, block, NULL); - } + qio_channel_set_blocking(f->ioc, block, NULL); } /* -- cgit v1.2.3 From 0ae1f7f055d757c01ce3144a7041fa9341a3715b Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= Date: Mon, 20 Jun 2022 12:02:01 +0100 Subject: migration: remove the QEMUFileOps 'close' callback MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This directly implements the close logic using QIOChannel APIs. Reviewed-by: Dr. David Alan Gilbert Signed-off-by: Daniel P. Berrangé Reviewed-by: Juan Quintela Signed-off-by: Juan Quintela Signed-off-by: Dr. David Alan Gilbert --- migration/qemu-file.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) (limited to 'migration/qemu-file.c') diff --git a/migration/qemu-file.c b/migration/qemu-file.c index 95d5db9dd6..74f919de67 100644 --- a/migration/qemu-file.c +++ b/migration/qemu-file.c @@ -408,16 +408,16 @@ void qemu_file_credit_transfer(QEMUFile *f, size_t size) */ int qemu_fclose(QEMUFile *f) { - int ret; + int ret, ret2; qemu_fflush(f); ret = qemu_file_get_error(f); - if (f->ops->close) { - int ret2 = f->ops->close(f->ioc, NULL); - if (ret >= 0) { - ret = ret2; - } + ret2 = qio_channel_close(f->ioc, NULL); + if (ret >= 0) { + ret = ret2; } + g_clear_pointer(&f->ioc, object_unref); + /* If any error was spotted before closing, we should report it * instead of the close() return value. */ -- cgit v1.2.3 From f759d7050bd0ec34f45bc0d91800625a6938e203 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= Date: Mon, 20 Jun 2022 12:02:02 +0100 Subject: migration: remove the QEMUFileOps 'get_buffer' callback MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This directly implements the get_buffer logic using QIOChannel APIs. Reviewed-by: Dr. David Alan Gilbert Signed-off-by: Daniel P. Berrangé Reviewed-by: Juan Quintela Signed-off-by: Juan Quintela Signed-off-by: Dr. David Alan Gilbert dgilbert: Fixup len = *-*EIO as spotted by Peter Xu --- migration/qemu-file.c | 18 ++++++++++++++++-- 1 file changed, 16 insertions(+), 2 deletions(-) (limited to 'migration/qemu-file.c') diff --git a/migration/qemu-file.c b/migration/qemu-file.c index 74f919de67..2f46873efd 100644 --- a/migration/qemu-file.c +++ b/migration/qemu-file.c @@ -377,8 +377,22 @@ static ssize_t qemu_fill_buffer(QEMUFile *f) return 0; } - len = f->ops->get_buffer(f->ioc, f->buf + pending, f->total_transferred, - IO_BUF_SIZE - pending, &local_error); + do { + len = qio_channel_read(f->ioc, + (char *)f->buf + pending, + IO_BUF_SIZE - pending, + &local_error); + if (len == QIO_CHANNEL_ERR_BLOCK) { + if (qemu_in_coroutine()) { + qio_channel_yield(f->ioc, G_IO_IN); + } else { + qio_channel_wait(f->ioc, G_IO_IN); + } + } else if (len < 0) { + len = -EIO; + } + } while (len == QIO_CHANNEL_ERR_BLOCK); + if (len > 0) { f->buf_size += len; f->total_transferred += len; -- cgit v1.2.3 From ec2135eec80dc0bd4089d8af2db28c386fadc558 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= Date: Mon, 20 Jun 2022 12:02:03 +0100 Subject: migration: remove the QEMUFileOps 'writev_buffer' callback MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This directly implements the writev_buffer logic using QIOChannel APIs. Reviewed-by: Dr. David Alan Gilbert Signed-off-by: Daniel P. Berrangé Reviewed-by: Juan Quintela Signed-off-by: Juan Quintela Signed-off-by: Dr. David Alan Gilbert --- migration/qemu-file.c | 24 ++++++++---------------- 1 file changed, 8 insertions(+), 16 deletions(-) (limited to 'migration/qemu-file.c') diff --git a/migration/qemu-file.c b/migration/qemu-file.c index 2f46873efd..355117fee0 100644 --- a/migration/qemu-file.c +++ b/migration/qemu-file.c @@ -248,10 +248,6 @@ static void qemu_iovec_release_ram(QEMUFile *f) */ void qemu_fflush(QEMUFile *f) { - ssize_t ret = 0; - ssize_t expect = 0; - Error *local_error = NULL; - if (!qemu_file_is_writable(f)) { return; } @@ -260,22 +256,18 @@ void qemu_fflush(QEMUFile *f) return; } if (f->iovcnt > 0) { - expect = iov_size(f->iov, f->iovcnt); - ret = f->ops->writev_buffer(f->ioc, f->iov, f->iovcnt, - f->total_transferred, &local_error); + Error *local_error = NULL; + if (qio_channel_writev_all(f->ioc, + f->iov, f->iovcnt, + &local_error) < 0) { + qemu_file_set_error_obj(f, -EIO, local_error); + } else { + f->total_transferred += iov_size(f->iov, f->iovcnt); + } qemu_iovec_release_ram(f); } - if (ret >= 0) { - f->total_transferred += ret; - } - /* We expect the QEMUFile write impl to send the full - * data set we requested, so sanity check that. - */ - if (ret != expect) { - qemu_file_set_error_obj(f, ret < 0 ? ret : -EIO, local_error); - } f->buf_index = 0; f->iovcnt = 0; } -- cgit v1.2.3 From 02bdbe172da51ae2189d8c6035c3aeb3788b553f Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= Date: Mon, 20 Jun 2022 12:02:04 +0100 Subject: migration: remove the QEMUFileOps 'get_return_path' callback MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This directly implements the get_return_path logic using QIOChannel APIs. Reviewed-by: Dr. David Alan Gilbert Signed-off-by: Daniel P. Berrangé Reviewed-by: Juan Quintela Signed-off-by: Juan Quintela Signed-off-by: Dr. David Alan Gilbert --- migration/qemu-file.c | 22 ++++++++++------------ 1 file changed, 10 insertions(+), 12 deletions(-) (limited to 'migration/qemu-file.c') diff --git a/migration/qemu-file.c b/migration/qemu-file.c index 355117fee0..fad0e33164 100644 --- a/migration/qemu-file.c +++ b/migration/qemu-file.c @@ -95,18 +95,6 @@ int qemu_file_shutdown(QEMUFile *f) return ret; } -/* - * Result: QEMUFile* for a 'return path' for comms in the opposite direction - * NULL if not available - */ -QEMUFile *qemu_file_get_return_path(QEMUFile *f) -{ - if (!f->ops->get_return_path) { - return NULL; - } - return f->ops->get_return_path(f->ioc); -} - bool qemu_file_mode_is_not_valid(const char *mode) { if (mode == NULL || @@ -134,6 +122,16 @@ static QEMUFile *qemu_file_new_impl(QIOChannel *ioc, return f; } +/* + * Result: QEMUFile* for a 'return path' for comms in the opposite direction + * NULL if not available + */ +QEMUFile *qemu_file_get_return_path(QEMUFile *f) +{ + object_ref(f->ioc); + return qemu_file_new_impl(f->ioc, f->ops, !f->is_writable); +} + QEMUFile *qemu_file_new_output(QIOChannel *ioc, const QEMUFileOps *ops) { return qemu_file_new_impl(ioc, ops, true); -- cgit v1.2.3 From 77ef2dc1c8c6a482fd06fdf3b59d0647f0850e3e Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= Date: Mon, 20 Jun 2022 12:02:05 +0100 Subject: migration: remove the QEMUFileOps abstraction MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Now that all QEMUFile callbacks are removed, the entire concept can be deleted. Reviewed-by: Dr. David Alan Gilbert Signed-off-by: Daniel P. Berrangé Reviewed-by: Juan Quintela Signed-off-by: Juan Quintela Signed-off-by: Dr. David Alan Gilbert --- migration/qemu-file.c | 20 ++++++++------------ 1 file changed, 8 insertions(+), 12 deletions(-) (limited to 'migration/qemu-file.c') diff --git a/migration/qemu-file.c b/migration/qemu-file.c index fad0e33164..1e80d496b7 100644 --- a/migration/qemu-file.c +++ b/migration/qemu-file.c @@ -35,7 +35,6 @@ #define MAX_IOV_SIZE MIN_CONST(IOV_MAX, 64) struct QEMUFile { - const QEMUFileOps *ops; const QEMUFileHooks *hooks; QIOChannel *ioc; bool is_writable; @@ -107,16 +106,14 @@ bool qemu_file_mode_is_not_valid(const char *mode) return false; } -static QEMUFile *qemu_file_new_impl(QIOChannel *ioc, - const QEMUFileOps *ops, - bool is_writable) +static QEMUFile *qemu_file_new_impl(QIOChannel *ioc, bool is_writable) { QEMUFile *f; f = g_new0(QEMUFile, 1); + object_ref(ioc); f->ioc = ioc; - f->ops = ops; f->is_writable = is_writable; return f; @@ -128,21 +125,19 @@ static QEMUFile *qemu_file_new_impl(QIOChannel *ioc, */ QEMUFile *qemu_file_get_return_path(QEMUFile *f) { - object_ref(f->ioc); - return qemu_file_new_impl(f->ioc, f->ops, !f->is_writable); + return qemu_file_new_impl(f->ioc, !f->is_writable); } -QEMUFile *qemu_file_new_output(QIOChannel *ioc, const QEMUFileOps *ops) +QEMUFile *qemu_file_new_output(QIOChannel *ioc) { - return qemu_file_new_impl(ioc, ops, true); + return qemu_file_new_impl(ioc, true); } -QEMUFile *qemu_file_new_input(QIOChannel *ioc, const QEMUFileOps *ops) +QEMUFile *qemu_file_new_input(QIOChannel *ioc) { - return qemu_file_new_impl(ioc, ops, false); + return qemu_file_new_impl(ioc, false); } - void qemu_file_set_hooks(QEMUFile *f, const QEMUFileHooks *hooks) { f->hooks = hooks; @@ -238,6 +233,7 @@ static void qemu_iovec_release_ram(QEMUFile *f) memset(f->may_free, 0, sizeof(f->may_free)); } + /** * Flushes QEMUFile buffer * -- cgit v1.2.3