From patchwork Fri Oct 25 06:35:35 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Darrick J. Wong" X-Patchwork-Id: 13850100 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id DC1CB18E362 for ; Fri, 25 Oct 2024 06:35:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729838136; cv=none; b=c9sgRmsjpVH/PtDSxG++ndl+HuhuZ4QX1uXLZ/ZqJxwi+FTvEE6FVvYYW836uF+eFFGatsk4/D877kZN24Qd9YOVbwDxmT8cH3NNpKhfKipa+AvyBeLG5de4mgNmuV6y6Fa1NGHJKhFidqK3b9u9fRmblTFPlg+UsvPMyjSDG5Y= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729838136; c=relaxed/simple; bh=olGLUNO8PIP8mlB+mV8X32PYLLSWsLPUA98XskmuKo0=; h=Date:Subject:From:To:Cc:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=cY1V0iQkiz5rM+d9B1x+P9xtRIxTZYrSaj72IerNuvMqGWhLBF/YiiaswHlTTD+YlebkxYNGx0XzMARVH4xyWE3ZjIWXcMaZEsr/oL64OLHEj50jI6UUSCQD2aF4KXdJtY5GCNJ/Kp5KNvV71TX+TqTXiwQBuF6yQIC50PkQjNw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=IU30SwP9; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="IU30SwP9" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6BEA4C4CEC3; Fri, 25 Oct 2024 06:35:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1729838136; bh=olGLUNO8PIP8mlB+mV8X32PYLLSWsLPUA98XskmuKo0=; h=Date:Subject:From:To:Cc:In-Reply-To:References:From; b=IU30SwP9qdtoHeJVLoFCOe4Asq4pDpKddCpoh9uSHvLqZKG6P7kUoj6WbiS0fGR2h TrvqnGbUldmbhdIzDGwf1TzoAOzVayg+8r1mYFTjm3mTy5O+gd444PV+ntmc7VwDgb 35yQ+MyWMnPc6Q3e1CQpxefDnPLEbA4Ejl0dAKpVpHyoFq4mhWMxZWERYYW+Ag0KgE KcKWbhForfky1QKre7oxTygKPEXH/97tyZPIOkrtxoZncYf9SkerzdqdrgTZcc/z9T 9TtYM4CG4X9FBcmvMLgrGMDyBYfQYwBYPS5u0uoFf/SpZdVcWtL6e4GiZ+UkWZSS+T hsFev749UZfWw== Date: Thu, 24 Oct 2024 23:35:35 -0700 Subject: [PATCH 5/8] xfs_db: access arbitrary realtime blocks and extents From: "Darrick J. Wong" To: cem@kernel.org, aalbersh@kernel.org, djwong@kernel.org Cc: linux-xfs@vger.kernel.org, hch@lst.de Message-ID: <172983773804.3041229.7516109047720839026.stgit@frogsfrogsfrogs> In-Reply-To: <172983773721.3041229.1240437778522879907.stgit@frogsfrogsfrogs> References: <172983773721.3041229.1240437778522879907.stgit@frogsfrogsfrogs> Precedence: bulk X-Mailing-List: linux-xfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Darrick J. Wong Add two commands to xfs_db so that we can point ourselves at any arbitrary realtime block or extent. Signed-off-by: Darrick J. Wong --- db/block.c | 105 +++++++++++++++++++++++++++++++++++++++++++++++++++++ man/man8/xfs_db.8 | 20 ++++++++++ 2 files changed, 125 insertions(+) diff --git a/db/block.c b/db/block.c index ff34557a612a2f..000f9c1ed10fcd 100644 --- a/db/block.c +++ b/db/block.c @@ -25,6 +25,10 @@ static int dblock_f(int argc, char **argv); static void dblock_help(void); static int fsblock_f(int argc, char **argv); static void fsblock_help(void); +static int rtblock_f(int argc, char **argv); +static void rtblock_help(void); +static int rtextent_f(int argc, char **argv); +static void rtextent_help(void); static void print_rawdata(void *data, int len); static const cmdinfo_t ablock_cmd = @@ -39,6 +43,12 @@ static const cmdinfo_t dblock_cmd = static const cmdinfo_t fsblock_cmd = { "fsblock", "fsb", fsblock_f, 0, 1, 1, N_("[fsb]"), N_("set address to fsblock value"), fsblock_help }; +static const cmdinfo_t rtblock_cmd = + { "rtblock", "rtbno", rtblock_f, 0, 1, 1, N_("[rtbno]"), + N_("set address to rtblock value"), rtblock_help }; +static const cmdinfo_t rtextent_cmd = + { "rtextent", "rtx", rtextent_f, 0, 1, 1, N_("[rtxno]"), + N_("set address to rtextent value"), rtextent_help }; static void ablock_help(void) @@ -104,6 +114,8 @@ block_init(void) add_command(&daddr_cmd); add_command(&dblock_cmd); add_command(&fsblock_cmd); + add_command(&rtblock_cmd); + add_command(&rtextent_cmd); } static void @@ -302,6 +314,99 @@ fsblock_f( return 0; } +static void +rtblock_help(void) +{ + dbprintf(_( +"\n Example:\n" +"\n" +" 'rtblock 1023' - sets the file position to the 1023rd block on the realtime\n" +" volume. The filesystem block size is specified in the superblock and set\n" +" during mkfs time.\n\n" +)); +} + +static int +rtblock_f( + int argc, + char **argv) +{ + xfs_rtblock_t rtbno; + char *p; + + if (argc == 1) { + if (!iocur_is_rtdev(iocur_top)) { + dbprintf(_("cursor does not point to rt device\n")); + return 0; + } + dbprintf(_("current rtblock is %lld\n"), + XFS_BB_TO_FSB(mp, iocur_top->off >> BBSHIFT)); + return 0; + } + rtbno = strtoull(argv[1], &p, 0); + if (*p != '\0') { + dbprintf(_("bad rtblock %s\n"), argv[1]); + return 0; + } + if (rtbno >= mp->m_sb.sb_rblocks) { + dbprintf(_("bad rtblock %s\n"), argv[1]); + return 0; + } + ASSERT(typtab[TYP_DATA].typnm == TYP_DATA); + set_rt_cur(&typtab[TYP_DATA], XFS_FSB_TO_BB(mp, rtbno), blkbb, + DB_RING_ADD, NULL); + return 0; +} + +static void +rtextent_help(void) +{ + dbprintf(_( +"\n Example:\n" +"\n" +" 'rtextent 10' - sets the file position to the 10th extent on the realtime\n" +" volume. The realtime extent size is specified in the superblock and set\n" +" during mkfs or growfs time.\n\n" +)); +} + +static int +rtextent_f( + int argc, + char **argv) +{ + xfs_rtblock_t rtbno; + xfs_rtxnum_t rtx; + char *p; + + if (argc == 1) { + if (!iocur_is_rtdev(iocur_top)) { + dbprintf(_("cursor does not point to rt device\n")); + return 0; + } + + rtbno = XFS_BB_TO_FSB(mp, iocur_top->off >> BBSHIFT); + dbprintf(_("current rtextent is %lld\n"), + xfs_rtb_to_rtx(mp, rtbno)); + return 0; + } + rtx = strtoull(argv[1], &p, 0); + if (*p != '\0') { + dbprintf(_("bad rtextent %s\n"), argv[1]); + return 0; + } + if (rtx >= mp->m_sb.sb_rextents) { + dbprintf(_("bad rtextent %s\n"), argv[1]); + return 0; + } + + rtbno = xfs_rtx_to_rtb(mp, rtx); + ASSERT(typtab[TYP_DATA].typnm == TYP_DATA); + set_rt_cur(&typtab[TYP_DATA], XFS_FSB_TO_BB(mp, rtbno), + mp->m_sb.sb_rextsize * blkbb, DB_RING_ADD, NULL); + return 0; +} + void print_block( const field_t *fields, diff --git a/man/man8/xfs_db.8 b/man/man8/xfs_db.8 index f50ac949be0189..b5060a68d3bfc4 100644 --- a/man/man8/xfs_db.8 +++ b/man/man8/xfs_db.8 @@ -1099,6 +1099,26 @@ .SH COMMANDS Exit .BR xfs_db . .TP +.BI "rtblock [" rtbno ] +Set current address to the rtblock value given by +.IR rtbno . +If no value for +.I rtbno +is given the current address is printed, expressed as an rtbno. +The type is set to +.B data +(uninterpreted). +.TP +.BI "rtextent [" rtxno ] +Set current address to the rtextent value given by +.IR rtextent . +If no value for +.I rtextent +is given the current address is printed, expressed as an rtextent. +The type is set to +.B data +(uninterpreted). +.TP .BI "ring [" index ] Show position ring (if no .I index