From patchwork Wed Feb 28 15:21:10 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Fabiano Rosas X-Patchwork-Id: 1905888 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=suse.de header.i=@suse.de header.a=rsa-sha256 header.s=susede2_rsa header.b=Xs82udfj; dkim=pass header.d=suse.de header.i=@suse.de header.a=ed25519-sha256 header.s=susede2_ed25519 header.b=AIULPLIS; dkim=pass (1024-bit key) header.d=suse.de header.i=@suse.de header.a=rsa-sha256 header.s=susede2_rsa header.b=Xs82udfj; dkim=neutral header.d=suse.de header.i=@suse.de header.a=ed25519-sha256 header.s=susede2_ed25519 header.b=AIULPLIS; dkim-atps=neutral Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=patchwork.ozlabs.org) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4TlJ8C2DLsz23qX for ; Thu, 29 Feb 2024 02:25:31 +1100 (AEDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rfLko-0006Yr-BG; Wed, 28 Feb 2024 10:21:54 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rfLkm-0006Y6-5p for qemu-devel@nongnu.org; Wed, 28 Feb 2024 10:21:52 -0500 Received: from smtp-out1.suse.de ([195.135.223.130]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1rfLkg-0004wD-No for qemu-devel@nongnu.org; Wed, 28 Feb 2024 10:21:51 -0500 Received: from imap1.dmz-prg2.suse.org (imap1.dmz-prg2.suse.org [IPv6:2a07:de40:b281:104:10:150:64:97]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by smtp-out1.suse.de (Postfix) with ESMTPS id 5DFF4225C1; Wed, 28 Feb 2024 15:21:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1709133705; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Vz6kqLJueuVTa+GtEWacyywR44TTJZO/ykZXIpzwQmQ=; b=Xs82udfj6di4X6TDpbVHRX+2kEv5ww9oWJ68jwvo8wPn00EZxk3bN1ej6uVG24u73dXPE/ iEG0+tqmjjrBYvmJA2m1VdYYVjD5ycdR/B9NfY7g3uu+yQ5A8NhQ0yJHKq4Ab0CoRvsD82 OkBP5PZbHYS1tS6BMLiOhMo09vhKCLg= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1709133705; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Vz6kqLJueuVTa+GtEWacyywR44TTJZO/ykZXIpzwQmQ=; b=AIULPLIS1NrDATfEWvHGgAUyWKzZOsKWd8W6g4ca/b4d2/u58Rj36izoUK0qAd7+yii+nS ZCCxBgZLlt8tcVBQ== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1709133705; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Vz6kqLJueuVTa+GtEWacyywR44TTJZO/ykZXIpzwQmQ=; b=Xs82udfj6di4X6TDpbVHRX+2kEv5ww9oWJ68jwvo8wPn00EZxk3bN1ej6uVG24u73dXPE/ iEG0+tqmjjrBYvmJA2m1VdYYVjD5ycdR/B9NfY7g3uu+yQ5A8NhQ0yJHKq4Ab0CoRvsD82 OkBP5PZbHYS1tS6BMLiOhMo09vhKCLg= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1709133705; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Vz6kqLJueuVTa+GtEWacyywR44TTJZO/ykZXIpzwQmQ=; b=AIULPLIS1NrDATfEWvHGgAUyWKzZOsKWd8W6g4ca/b4d2/u58Rj36izoUK0qAd7+yii+nS ZCCxBgZLlt8tcVBQ== Received: from imap1.dmz-prg2.suse.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by imap1.dmz-prg2.suse.org (Postfix) with ESMTPS id BE2E113A5D; Wed, 28 Feb 2024 15:21:43 +0000 (UTC) Received: from dovecot-director2.suse.de ([10.150.64.162]) by imap1.dmz-prg2.suse.org with ESMTPSA id yJ8NIYdP32UPAwAAD6G6ig (envelope-from ); Wed, 28 Feb 2024 15:21:43 +0000 From: Fabiano Rosas To: qemu-devel@nongnu.org Cc: berrange@redhat.com, armbru@redhat.com, Peter Xu , Claudio Fontana Subject: [PATCH v5 06/23] migration/qemu-file: add utility methods for working with seekable channels Date: Wed, 28 Feb 2024 12:21:10 -0300 Message-Id: <20240228152127.18769-7-farosas@suse.de> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20240228152127.18769-1-farosas@suse.de> References: <20240228152127.18769-1-farosas@suse.de> MIME-Version: 1.0 Authentication-Results: smtp-out1.suse.de; dkim=pass header.d=suse.de header.s=susede2_rsa header.b=Xs82udfj; dkim=pass header.d=suse.de header.s=susede2_ed25519 header.b=AIULPLIS X-Rspamd-Server: rspamd2.dmz-prg2.suse.org X-Spamd-Result: default: False [-3.51 / 50.00]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; R_DKIM_ALLOW(-0.20)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; MIME_GOOD(-0.10)[text/plain]; RCPT_COUNT_FIVE(0.00)[5]; RCVD_COUNT_THREE(0.00)[3]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; DKIM_TRACE(0.00)[suse.de:+]; MX_GOOD(-0.01)[]; MID_CONTAINS_FROM(1.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.de:dkim,suse.de:email]; FUZZY_BLOCKED(0.00)[rspamd.com]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; NEURAL_HAM_SHORT(-0.20)[-1.000]; RCVD_TLS_ALL(0.00)[]; BAYES_HAM(-3.00)[100.00%] X-Spam-Score: -3.51 X-Rspamd-Queue-Id: 5DFF4225C1 Received-SPF: pass client-ip=195.135.223.130; envelope-from=farosas@suse.de; helo=smtp-out1.suse.de X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Add utility methods that will be needed when implementing 'mapped-ram' migration capability. Signed-off-by: Fabiano Rosas Reviewed-by: Daniel P. Berrangé --- include/migration/qemu-file-types.h | 2 + migration/qemu-file.c | 106 ++++++++++++++++++++++++++++ migration/qemu-file.h | 6 ++ 3 files changed, 114 insertions(+) diff --git a/include/migration/qemu-file-types.h b/include/migration/qemu-file-types.h index 9ba163f333..adec5abc07 100644 --- a/include/migration/qemu-file-types.h +++ b/include/migration/qemu-file-types.h @@ -50,6 +50,8 @@ unsigned int qemu_get_be16(QEMUFile *f); unsigned int qemu_get_be32(QEMUFile *f); uint64_t qemu_get_be64(QEMUFile *f); +bool qemu_file_is_seekable(QEMUFile *f); + static inline void qemu_put_be64s(QEMUFile *f, const uint64_t *pv) { qemu_put_be64(f, *pv); diff --git a/migration/qemu-file.c b/migration/qemu-file.c index 94231ff295..b10c882629 100644 --- a/migration/qemu-file.c +++ b/migration/qemu-file.c @@ -33,6 +33,7 @@ #include "options.h" #include "qapi/error.h" #include "rdma.h" +#include "io/channel-file.h" #define IO_BUF_SIZE 32768 #define MAX_IOV_SIZE MIN_CONST(IOV_MAX, 64) @@ -255,6 +256,10 @@ static void qemu_iovec_release_ram(QEMUFile *f) memset(f->may_free, 0, sizeof(f->may_free)); } +bool qemu_file_is_seekable(QEMUFile *f) +{ + return qio_channel_has_feature(f->ioc, QIO_CHANNEL_FEATURE_SEEKABLE); +} /** * Flushes QEMUFile buffer @@ -447,6 +452,107 @@ void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, size_t size) } } +void qemu_put_buffer_at(QEMUFile *f, const uint8_t *buf, size_t buflen, + off_t pos) +{ + Error *err = NULL; + size_t ret; + + if (f->last_error) { + return; + } + + qemu_fflush(f); + ret = qio_channel_pwrite(f->ioc, (char *)buf, buflen, pos, &err); + + if (err) { + qemu_file_set_error_obj(f, -EIO, err); + return; + } + + if ((ssize_t)ret == QIO_CHANNEL_ERR_BLOCK) { + qemu_file_set_error_obj(f, -EAGAIN, NULL); + return; + } + + if (ret != buflen) { + error_setg(&err, "Partial write of size %zu, expected %zu", ret, + buflen); + qemu_file_set_error_obj(f, -EIO, err); + return; + } + + stat64_add(&mig_stats.qemu_file_transferred, buflen); + + return; +} + + +size_t qemu_get_buffer_at(QEMUFile *f, const uint8_t *buf, size_t buflen, + off_t pos) +{ + Error *err = NULL; + size_t ret; + + if (f->last_error) { + return 0; + } + + ret = qio_channel_pread(f->ioc, (char *)buf, buflen, pos, &err); + + if ((ssize_t)ret == -1 || err) { + qemu_file_set_error_obj(f, -EIO, err); + return 0; + } + + if ((ssize_t)ret == QIO_CHANNEL_ERR_BLOCK) { + qemu_file_set_error_obj(f, -EAGAIN, NULL); + return 0; + } + + if (ret != buflen) { + error_setg(&err, "Partial read of size %zu, expected %zu", ret, buflen); + qemu_file_set_error_obj(f, -EIO, err); + return 0; + } + + return ret; +} + +void qemu_set_offset(QEMUFile *f, off_t off, int whence) +{ + Error *err = NULL; + off_t ret; + + if (qemu_file_is_writable(f)) { + qemu_fflush(f); + } else { + /* Drop all cached buffers if existed; will trigger a re-fill later */ + f->buf_index = 0; + f->buf_size = 0; + } + + ret = qio_channel_io_seek(f->ioc, off, whence, &err); + if (ret == (off_t)-1) { + qemu_file_set_error_obj(f, -EIO, err); + } +} + +off_t qemu_get_offset(QEMUFile *f) +{ + Error *err = NULL; + off_t ret; + + qemu_fflush(f); + + ret = qio_channel_io_seek(f->ioc, 0, SEEK_CUR, &err); + if (ret == (off_t)-1) { + qemu_file_set_error_obj(f, -EIO, err); + } + return ret; +} + + void qemu_put_byte(QEMUFile *f, int v) { if (f->last_error) { diff --git a/migration/qemu-file.h b/migration/qemu-file.h index 8aec9fabf7..32fd4a34fd 100644 --- a/migration/qemu-file.h +++ b/migration/qemu-file.h @@ -75,6 +75,12 @@ QEMUFile *qemu_file_get_return_path(QEMUFile *f); int qemu_fflush(QEMUFile *f); void qemu_file_set_blocking(QEMUFile *f, bool block); int qemu_file_get_to_fd(QEMUFile *f, int fd, size_t size); +void qemu_set_offset(QEMUFile *f, off_t off, int whence); +off_t qemu_get_offset(QEMUFile *f); +void qemu_put_buffer_at(QEMUFile *f, const uint8_t *buf, size_t buflen, + off_t pos); +size_t qemu_get_buffer_at(QEMUFile *f, const uint8_t *buf, size_t buflen, + off_t pos); QIOChannel *qemu_file_get_ioc(QEMUFile *file);