From nobody Sun Feb 8 22:07:13 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1498566997614137.75568644430166; Tue, 27 Jun 2017 05:36:37 -0700 (PDT) Received: from localhost ([::1]:52640 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dPpjP-0006b0-Tr for importer@patchew.org; Tue, 27 Jun 2017 08:36:35 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:42475) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dPphQ-00057o-Pl for qemu-devel@nongnu.org; Tue, 27 Jun 2017 08:34:34 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dPphP-0005Hw-3L for qemu-devel@nongnu.org; Tue, 27 Jun 2017 08:34:32 -0400 Received: from mx-v6.kamp.de ([2a02:248:0:51::16]:41082 helo=mx01.kamp.de) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dPphO-0005HC-Q9 for qemu-devel@nongnu.org; Tue, 27 Jun 2017 08:34:31 -0400 Received: (qmail 22895 invoked by uid 89); 27 Jun 2017 12:34:29 -0000 Received: from [195.62.97.28] by client-16-kamp (envelope-from , uid 89) with qmail-scanner-2010/03/19-MF (clamdscan: 0.99.2/23511. avast: 1.2.2/17010300. spamassassin: 3.4.1. 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Processed in 0.29016 secs); 27 Jun 2017 12:34:29 -0000 Received: from smtp.kamp.de (HELO submission.kamp.de) ([195.62.97.28]) by mx01.kamp.de with ESMTPS (DHE-RSA-AES256-GCM-SHA384 encrypted); 27 Jun 2017 12:34:25 -0000 Received: (qmail 29620 invoked from network); 27 Jun 2017 12:34:20 -0000 Received: from lieven-pc.kamp-intra.net (HELO lieven-pc) (relay@kamp.de@::ffff:172.21.12.60) by submission.kamp.de with ESMTPS (DHE-RSA-AES256-GCM-SHA384 encrypted) ESMTPA; 27 Jun 2017 12:34:20 -0000 Received: by lieven-pc (Postfix, from userid 1000) id 81F7F26C5E; Tue, 27 Jun 2017 14:34:20 +0200 (CEST) X-GL_Whitelist: yes From: Peter Lieven To: qemu-block@nongnu.org Date: Tue, 27 Jun 2017 14:34:09 +0200 Message-Id: <1498566850-7934-4-git-send-email-pl@kamp.de> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1498566850-7934-1-git-send-email-pl@kamp.de> References: <1498566850-7934-1-git-send-email-pl@kamp.de> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 2a02:248:0:51::16 Subject: [Qemu-devel] [PATCH 3/4] block/qcow2: add lzo compression algorithm X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kwolf@redhat.com, Peter Lieven , qemu-devel@nongnu.org, mreitz@redhat.com, den@openvz.org, lersek@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Signed-off-by: Peter Lieven --- block/qcow2-cluster.c | 65 +++++++++++++++++++++++++++++++--------------- block/qcow2.c | 72 ++++++++++++++++++++++++++++++++++-------------= ---- block/qcow2.h | 1 + configure | 2 +- qemu-img.texi | 1 + 5 files changed, 95 insertions(+), 46 deletions(-) diff --git a/block/qcow2-cluster.c b/block/qcow2-cluster.c index 3d341fd..ecb059b 100644 --- a/block/qcow2-cluster.c +++ b/block/qcow2-cluster.c @@ -24,6 +24,9 @@ =20 #include "qemu/osdep.h" #include +#ifdef CONFIG_LZO +#include +#endif =20 #include "qapi/error.h" #include "qemu-common.h" @@ -1521,30 +1524,49 @@ again: } =20 static int decompress_buffer(uint8_t *out_buf, int out_buf_size, - const uint8_t *buf, int buf_size) + const uint8_t *buf, int buf_size, + uint32_t compression_algorithm_id) { z_stream strm1, *strm =3D &strm1; - int ret, out_len; - - memset(strm, 0, sizeof(*strm)); - - strm->next_in =3D (uint8_t *)buf; - strm->avail_in =3D buf_size; - strm->next_out =3D out_buf; - strm->avail_out =3D out_buf_size; - - ret =3D inflateInit2(strm, -12); - if (ret !=3D Z_OK) - return -1; - ret =3D inflate(strm, Z_FINISH); - out_len =3D strm->next_out - out_buf; - if ((ret !=3D Z_STREAM_END && ret !=3D Z_BUF_ERROR) || - out_len !=3D out_buf_size) { + int ret =3D 0, out_len; + + switch (compression_algorithm_id) { + case QCOW2_COMPRESSION_ZLIB: + memset(strm, 0, sizeof(*strm)); + + strm->next_in =3D (uint8_t *)buf; + strm->avail_in =3D buf_size; + strm->next_out =3D out_buf; + strm->avail_out =3D out_buf_size; + + ret =3D inflateInit2(strm, -12); + if (ret !=3D Z_OK) { + return -1; + } + ret =3D inflate(strm, Z_FINISH); + out_len =3D strm->next_out - out_buf; + ret =3D -(ret !=3D Z_STREAM_END); inflateEnd(strm); - return -1; + break; +#ifdef CONFIG_LZO + case QCOW2_COMPRESSION_LZO: + out_len =3D out_buf_size; + ret =3D lzo1x_decompress_safe(buf, buf_size, out_buf, + (lzo_uint *) &out_len, NULL); + if (ret =3D=3D LZO_E_INPUT_NOT_CONSUMED) { + /* We always read up to the next sector boundary. Thus + * buf_size may be larger than the original compressed size. */ + ret =3D 0; + } + break; +#endif + default: + abort(); /* should never reach this point */ } - inflateEnd(strm); - return 0; + if (out_len !=3D out_buf_size) { + ret =3D -1; + } + return ret; } =20 int qcow2_decompress_cluster(BlockDriverState *bs, uint64_t cluster_offset) @@ -1565,7 +1587,8 @@ int qcow2_decompress_cluster(BlockDriverState *bs, ui= nt64_t cluster_offset) return ret; } if (decompress_buffer(s->cluster_cache, s->cluster_size, - s->cluster_data + sector_offset, csize) < 0)= { + s->cluster_data + sector_offset, csize, + s->compression_algorithm_id) < 0) { return -EIO; } s->cluster_cache_offset =3D coffset; diff --git a/block/qcow2.c b/block/qcow2.c index c91eb1f..bd65582 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -26,6 +26,9 @@ #include "sysemu/block-backend.h" #include "qemu/module.h" #include +#ifdef CONFIG_LZO +#include +#endif #include "block/qcow2.h" #include "qemu/error-report.h" #include "qapi/qmp/qerror.h" @@ -84,6 +87,10 @@ static uint32_t is_compression_algorithm_supported(char = *algorithm) /* no algorithm means the old default of zlib compression * with 12 window bits */ return QCOW2_COMPRESSION_ZLIB; +#ifdef CONFIG_LZO + } else if (!strcmp(algorithm, "lzo")) { + return QCOW2_COMPRESSION_LZO; +#endif } return 0; } @@ -2715,8 +2722,8 @@ qcow2_co_pwritev_compressed(BlockDriverState *bs, uin= t64_t offset, QEMUIOVector hd_qiov; struct iovec iov; z_stream strm; - int ret, out_len; - uint8_t *buf, *out_buf, *local_buf =3D NULL; + int ret, out_len =3D 0; + uint8_t *buf, *out_buf =3D NULL, *local_buf =3D NULL, *work_buf =3D NU= LL; uint64_t cluster_offset; =20 if (bytes =3D=3D 0) { @@ -2741,34 +2748,50 @@ qcow2_co_pwritev_compressed(BlockDriverState *bs, u= int64_t offset, buf =3D qiov->iov[0].iov_base; } =20 - out_buf =3D g_malloc(s->cluster_size); + switch (s->compression_algorithm_id) { + case QCOW2_COMPRESSION_ZLIB: + out_buf =3D g_malloc(s->cluster_size); =20 - /* best compression, small window, no zlib header */ - memset(&strm, 0, sizeof(strm)); - ret =3D deflateInit2(&strm, Z_DEFAULT_COMPRESSION, - Z_DEFLATED, -12, - 9, Z_DEFAULT_STRATEGY); - if (ret !=3D 0) { - ret =3D -EINVAL; - goto fail; - } + /* best compression, small window, no zlib header */ + memset(&strm, 0, sizeof(strm)); + ret =3D deflateInit2(&strm, Z_DEFAULT_COMPRESSION, + Z_DEFLATED, -12, + 9, Z_DEFAULT_STRATEGY); + if (ret !=3D 0) { + ret =3D -EINVAL; + goto fail; + } =20 - strm.avail_in =3D s->cluster_size; - strm.next_in =3D (uint8_t *)buf; - strm.avail_out =3D s->cluster_size; - strm.next_out =3D out_buf; + strm.avail_in =3D s->cluster_size; + strm.next_in =3D (uint8_t *)buf; + strm.avail_out =3D s->cluster_size; + strm.next_out =3D out_buf; + + ret =3D deflate(&strm, Z_FINISH); + if (ret !=3D Z_STREAM_END && ret !=3D Z_OK) { + deflateEnd(&strm); + ret =3D -EINVAL; + goto fail; + } + out_len =3D strm.next_out - out_buf; =20 - ret =3D deflate(&strm, Z_FINISH); - if (ret !=3D Z_STREAM_END && ret !=3D Z_OK) { deflateEnd(&strm); - ret =3D -EINVAL; - goto fail; - } - out_len =3D strm.next_out - out_buf; =20 - deflateEnd(&strm); + ret =3D ret !=3D Z_STREAM_END; + break; +#ifdef CONFIG_LZO + case QCOW2_COMPRESSION_LZO: + out_buf =3D g_malloc(s->cluster_size + s->cluster_size / 64 + 16 += 3); + work_buf =3D g_malloc(LZO1X_1_MEM_COMPRESS); + ret =3D lzo1x_1_compress(buf, s->cluster_size, out_buf, + (lzo_uint *) &out_len, work_buf); + break; +#endif + default: + abort(); /* should never reach this point */ + } =20 - if (ret !=3D Z_STREAM_END || out_len >=3D s->cluster_size) { + if (ret || out_len >=3D s->cluster_size) { /* could not compress: write normal cluster */ ret =3D qcow2_co_pwritev(bs, offset, bytes, qiov, 0); if (ret < 0) { @@ -2809,6 +2832,7 @@ success: fail: qemu_vfree(local_buf); g_free(out_buf); + g_free(work_buf); return ret; } =20 diff --git a/block/qcow2.h b/block/qcow2.h index 1c9ba06..716012c 100644 --- a/block/qcow2.h +++ b/block/qcow2.h @@ -172,6 +172,7 @@ typedef struct Qcow2UnknownHeaderExtension { =20 enum { QCOW2_COMPRESSION_ZLIB =3D 0xC0318301, + QCOW2_COMPRESSION_LZO =3D 0xC0318302, }; =20 enum { diff --git a/configure b/configure index c571ad1..81d3286 100755 --- a/configure +++ b/configure @@ -1890,7 +1890,7 @@ if test "$lzo" !=3D "no" ; then int main(void) { lzo_version(); return 0; } EOF if compile_prog "" "-llzo2" ; then - libs_softmmu=3D"$libs_softmmu -llzo2" + LIBS=3D"$LIBS -llzo2" lzo=3D"yes" else if test "$lzo" =3D "yes"; then diff --git a/qemu-img.texi b/qemu-img.texi index c0d1bec..043c1ba 100644 --- a/qemu-img.texi +++ b/qemu-img.texi @@ -627,6 +627,7 @@ The following options are available if support for the = respective libraries has been enabled at compile time: =20 zlib Uses standard zlib compression (default) + lzo Uses LZO1X compression =20 The compression algorithm can only be defined at image create time and can= not be changed later. --=20 1.9.1