From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 920ACC433F5 for ; Sun, 16 Jan 2022 08:50:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234513AbiAPIuS (ORCPT ); Sun, 16 Jan 2022 03:50:18 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41736 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230421AbiAPIuR (ORCPT ); Sun, 16 Jan 2022 03:50:17 -0500 Received: from mail-pf1-x432.google.com (mail-pf1-x432.google.com [IPv6:2607:f8b0:4864:20::432]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C86F1C061574 for ; Sun, 16 Jan 2022 00:50:17 -0800 (PST) Received: by mail-pf1-x432.google.com with SMTP id a5so6920873pfo.5 for ; Sun, 16 Jan 2022 00:50:17 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id; bh=zN+XDftrgAUHFMiUX9svS8GFo19XMARuamUVJNyydnc=; b=WA40ANAqHR25SxTE3F5rnerQBxi3aHLvquzS3PswkUgH8Au991IJ0ANg5AOc0IWztZ kkIzYsrgRmisaY/Ne9Ud4ZOt8Zgj/yoATefxBlJnSahegswQkb6rPS4PIPnNhmfpBBHu kHo2btJRiXhcUmuRdmXBsbV5mtt9MtZEkV4Bm1kLxr5KawDwW92UHvewn2AHro1995U9 NSkPb42Up1MvEd6GXNsRkkGywqpxh33XaFBSYK+3BGQyj9zD+8RP3+rd+y+jt+C6Y0WM NsYurx46O+DzY4+bLil+AcThUrl2YMRVAPMTvFpsrpsqBFiDmhjqYsveEU4z+y13w4pu PGpQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id; bh=zN+XDftrgAUHFMiUX9svS8GFo19XMARuamUVJNyydnc=; b=05mxAoI8E7AJcPdbRqujiV52gwnmJA9Cd0BumiRhS9vTYgAYPUl6hIp9oWu+WKxe6G I7ZulYIya15fYDbJDP+WoC3SPtbBKHr2z7RI+JrStlUffuoXD2UH+drYgv3WzL6grUDL Tjfosqa9ZLoZkpgbGT0sg6icT8oedNDbfYHsb7I1t/eWIMXirmC7xwE2fUEtCoXEth6q dktaM05wk3X7skyUVEAzUb4lPGR6BY9SHedm5ozA0kdTtFC7Hq9782alXmdIPQDsZwrA R2ivjYNRY01fsC4a6w/48sQ68QnpTsFOJugKfhnLT9O/gZpfpXVv/kA2Z39txsn8PJBo 5e6Q== X-Gm-Message-State: AOAM530kuvO0iwoj3v/JwrMj0Fk1b9fYMU/zJfI1/SLYRJ9sl8WtfS7B P4pYghgkbaoDQmZb+WfvQ2hC9TWsFFZau6sX X-Google-Smtp-Source: ABdhPJy0HdpZnuLJrmB2CiizMTqGNZxDKTTsOiUnQJazYf1PTTaF8FpKXB5FMmHfd9spXXT1saEZUw== X-Received: by 2002:a05:6a00:1a94:b0:4c3:a8f8:1e46 with SMTP id e20-20020a056a001a9400b004c3a8f81e46mr3487020pfv.2.1642323016979; Sun, 16 Jan 2022 00:50:16 -0800 (PST) Received: from zllke.localdomain ([113.99.5.116]) by smtp.gmail.com with ESMTPSA id l2sm9849028pfe.189.2022.01.16.00.50.15 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Sun, 16 Jan 2022 00:50:16 -0800 (PST) From: Li Zhang To: linux-btrfs@vger.kernel.org Cc: zhanglikernel@gmail.com Subject: [PATCH 3/5] btrfs: Convert compression description strings into system flags. Date: Sun, 16 Jan 2022 16:50:09 +0800 Message-Id: <1642323009-1953-1-git-send-email-zhanglikernel@gmail.com> X-Mailer: git-send-email 1.8.3.1 Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org 1. Calls the function in compress.c to Clean up the redundant code that parses the compression description string into system flags. 2. Convert the compressed description string to a combination of compression type and compression level. Signed-off-by: Li Zhang --- fs/btrfs/props.c | 52 +++++++++++++++++++++++---------- fs/btrfs/super.c | 89 ++++++++++++++++++++++++-------------------------------- 2 files changed, 74 insertions(+), 67 deletions(-) diff --git a/fs/btrfs/props.c b/fs/btrfs/props.c index 1a6d2d5..f07be37 100644 --- a/fs/btrfs/props.c +++ b/fs/btrfs/props.c @@ -272,13 +272,16 @@ static int prop_compression_apply(struct inode *inode, const char *value, { struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb); int type; + char* clean_value; + int ret; /* Reset to defaults */ if (len == 0) { BTRFS_I(inode)->flags &= ~BTRFS_INODE_COMPRESS; BTRFS_I(inode)->flags &= ~BTRFS_INODE_NOCOMPRESS; BTRFS_I(inode)->prop_compress = BTRFS_COMPRESS_NONE; - return 0; + ret = 0; + goto out; } /* Set NOCOMPRESS flag */ @@ -287,27 +290,44 @@ static int prop_compression_apply(struct inode *inode, const char *value, BTRFS_I(inode)->flags |= BTRFS_INODE_NOCOMPRESS; BTRFS_I(inode)->flags &= ~BTRFS_INODE_COMPRESS; BTRFS_I(inode)->prop_compress = BTRFS_COMPRESS_NONE; - - return 0; + ret = 0; + goto out; } - if (!strncmp("lzo", value, 3)) { - type = BTRFS_COMPRESS_LZO; - btrfs_set_fs_incompat(fs_info, COMPRESS_LZO); - } else if (!strncmp("zlib", value, 4)) { - type = BTRFS_COMPRESS_ZLIB; - } else if (!strncmp("zstd", value, 4)) { - type = BTRFS_COMPRESS_ZSTD; - btrfs_set_fs_incompat(fs_info, COMPRESS_ZSTD); - } else { - return -EINVAL; - } + /* + * The value contains gibberish at the end, we should clean it up. + */ + clean_value = kzalloc(len + 1, GFP_NOFS); + if(!clean_value){ + ret = -ENOMEM; + goto out; + } + strncpy(clean_value, value, len); + + if(!btrfs_compress_is_valid_type(value, len)){ + ret = -EINVAL; + goto free_clean_value; + } + type = btrfs_compress_str2type_level(clean_value, NULL, NULL); + switch(btrfs_compress_type(type)){ + case BTRFS_COMPRESS_LZO: + btrfs_set_fs_incompat(fs_info, COMPRESS_LZO); + break; + case BTRFS_COMPRESS_ZSTD: + btrfs_set_fs_incompat(fs_info, COMPRESS_ZSTD); + break; + default: + break; + } BTRFS_I(inode)->flags &= ~BTRFS_INODE_NOCOMPRESS; BTRFS_I(inode)->flags |= BTRFS_INODE_COMPRESS; BTRFS_I(inode)->prop_compress = type; - - return 0; + ret = 0; +free_clean_value: + kfree(clean_value); +out: + return ret; } static const char *prop_compression_extract(struct inode *inode) diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index 0ec09fe..fea7e2d 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -574,6 +574,7 @@ int btrfs_parse_options(struct btrfs_fs_info *info, char *options, int saved_compress_level; bool saved_compress_force; int no_compress = 0; + unsigned compress_type_flag, compress_level_flag; if (btrfs_fs_compat_ro(info, FREE_SPACE_TREE)) btrfs_set_opt(info->mount_opt, FREE_SPACE_TREE); @@ -660,62 +661,48 @@ int btrfs_parse_options(struct btrfs_fs_info *info, char *options, saved_compress_force = btrfs_test_opt(info, FORCE_COMPRESS); saved_compress_level = info->compress_level; - if (token == Opt_compress || - token == Opt_compress_force || - strncmp(args[0].from, "zlib", 4) == 0) { - compress_type = "zlib"; - - info->compress_type = BTRFS_COMPRESS_ZLIB; - info->compress_level = BTRFS_ZLIB_DEFAULT_LEVEL; - /* - * args[0] contains uninitialized data since - * for these tokens we don't expect any - * parameter. - */ - if (token != Opt_compress && - token != Opt_compress_force) - info->compress_level = - btrfs_compress_str2level( - BTRFS_COMPRESS_ZLIB, - args[0].from + 4); - btrfs_set_opt(info->mount_opt, COMPRESS); - btrfs_clear_opt(info->mount_opt, NODATACOW); - btrfs_clear_opt(info->mount_opt, NODATASUM); - no_compress = 0; - } else if (strncmp(args[0].from, "lzo", 3) == 0) { - compress_type = "lzo"; - info->compress_type = BTRFS_COMPRESS_LZO; + if( token == Opt_compress || token == Opt_compress_force ){ + /* + * defaule compression type + */ + compress_type = "zlib"; + } else { + compress_type = args[0].from; + } + if(!strncmp(compress_type, "no", 2)){ + /* + * Handle no compression specially + */ + btrfs_clear_opt(info->mount_opt, COMPRESS); + btrfs_clear_opt(info->mount_opt, FORCE_COMPRESS); + compress_force = false; + info->compress_type = 0; info->compress_level = 0; + no_compress++; + } else { + if(!btrfs_compress_is_valid_type( + compress_type, strlen(compress_type))){ + ret = -EINVAL; + goto out; + } + btrfs_compress_str2type_level(compress_type, + &compress_type_flag, &compress_level_flag); + switch(compress_type_flag){ + case BTRFS_COMPRESS_ZSTD: + btrfs_set_fs_incompat(info, COMPRESS_ZSTD); + break; + case BTRFS_COMPRESS_LZO: + btrfs_set_fs_incompat(info, COMPRESS_LZO); + break; + } btrfs_set_opt(info->mount_opt, COMPRESS); btrfs_clear_opt(info->mount_opt, NODATACOW); btrfs_clear_opt(info->mount_opt, NODATASUM); - btrfs_set_fs_incompat(info, COMPRESS_LZO); - no_compress = 0; - } else if (strncmp(args[0].from, "zstd", 4) == 0) { - compress_type = "zstd"; - info->compress_type = BTRFS_COMPRESS_ZSTD; - info->compress_level = - btrfs_compress_str2level( - BTRFS_COMPRESS_ZSTD, - args[0].from + 4); - btrfs_set_opt(info->mount_opt, COMPRESS); - btrfs_clear_opt(info->mount_opt, NODATACOW); - btrfs_clear_opt(info->mount_opt, NODATASUM); - btrfs_set_fs_incompat(info, COMPRESS_ZSTD); no_compress = 0; - } else if (strncmp(args[0].from, "no", 2) == 0) { - compress_type = "no"; - info->compress_level = 0; - info->compress_type = 0; - btrfs_clear_opt(info->mount_opt, COMPRESS); - btrfs_clear_opt(info->mount_opt, FORCE_COMPRESS); - compress_force = false; - no_compress++; - } else { - ret = -EINVAL; - goto out; - } - + info->compress_type = compress_type_flag; + info->compress_level = compress_level_flag; + } + if (compress_force) { btrfs_set_opt(info->mount_opt, FORCE_COMPRESS); } else { -- 1.8.3.1