From patchwork Mon Apr 15 23:54:52 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: 13630890 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 3DB5C2E852 for ; Mon, 15 Apr 2024 23:54:52 +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=1713225293; cv=none; b=KNQcIjaxTfIPxXk7AA3GU2xTW6zr1Z5YnneEy4j08FDAb/tRQ1bxEvPOLaykWW7LaWGdxBi5ZBPQe7NPlmLXH2Nr1N858Jd72icdQ88OYP0P+alnmv9GthrKgc/9W/qz4zZeb++r0D/Utk5oq9ZwqfVKqzyt5J9TiZYQE/rFzE8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713225293; c=relaxed/simple; bh=hIGo7EAccJiyAnHS9C5dJbhm61cHfzUgpX/iccBx8dg=; h=Date:Subject:From:To:Cc:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=Zl3C44vj3Hvt/r7pYXwAO1osJlWJbDhHbj2KyDLZLC15YH5e6uivHtSZ6XopePNi1zMEkxkufNAujRpQfpH20IooD8WZJnpT45JyGuRwuohryzeMCeI0QbLGpGhBVQAX7sWhOc3kfcwhaGzSlxXPTr2IvpPIrEusVVTnoiTT9pw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ee0krhaD; 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="ee0krhaD" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B680CC113CC; Mon, 15 Apr 2024 23:54:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1713225292; bh=hIGo7EAccJiyAnHS9C5dJbhm61cHfzUgpX/iccBx8dg=; h=Date:Subject:From:To:Cc:In-Reply-To:References:From; b=ee0krhaDiUtlj25ydzUqumDnu4uUTu4VuB7PE1egqeRvkxY/smwnWDcqsd26gieTN g6C1rYgEN2LFsKdtDss5Bh344//t+G3Q2mqLQ1TpxWvy6mSg+R+RE5ZlLGaBAvPfyD H/lJkPKskfaHLBygpLdDzXAwKxa+dTue731XbT0haRqXSPPYbSxy3/wQ7bsDMxFAd1 NUOVzSQHWyFQRMtavv9Ag4grIZZrcfj0MSFOozO3CquIlDmHugnoAQRTWsvvNsYtu/ 6atvvJoqnAp1tomWkxMuPszeWBUXRXECJhAkITezAshLAKhmCuZZbUdhE8I4QRDXTJ NWj11Ntb0r41Q== Date: Mon, 15 Apr 2024 16:54:52 -0700 Subject: [PATCH 2/3] xfs: hoist AGI repair context to a heap object From: "Darrick J. Wong" To: chandanbabu@kernel.org, djwong@kernel.org Cc: Christoph Hellwig , hch@lst.de, linux-xfs@vger.kernel.org Message-ID: <171322385054.91285.4272893691984664022.stgit@frogsfrogsfrogs> In-Reply-To: <171322385012.91285.3470147913307339944.stgit@frogsfrogsfrogs> References: <171322385012.91285.3470147913307339944.stgit@frogsfrogsfrogs> User-Agent: StGit/0.19 Precedence: bulk X-Mailing-List: linux-xfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Darrick J. Wong Save ~460 bytes of stack space by moving all the repair context to a heap object. We're going to add even more context data in the next patch, which is why we really need to do this now. Signed-off-by: Darrick J. Wong Reviewed-by: Christoph Hellwig --- fs/xfs/scrub/agheader_repair.c | 105 ++++++++++++++++++++++++---------------- 1 file changed, 63 insertions(+), 42 deletions(-) diff --git a/fs/xfs/scrub/agheader_repair.c b/fs/xfs/scrub/agheader_repair.c index 427054b65b23..d210bd7d5eb1 100644 --- a/fs/xfs/scrub/agheader_repair.c +++ b/fs/xfs/scrub/agheader_repair.c @@ -796,15 +796,29 @@ enum { XREP_AGI_MAX }; +struct xrep_agi { + struct xfs_scrub *sc; + + /* AGI buffer, tracked separately */ + struct xfs_buf *agi_bp; + + /* context for finding btree roots */ + struct xrep_find_ag_btree fab[XREP_AGI_MAX]; + + /* old AGI contents in case we have to revert */ + struct xfs_agi old_agi; +}; + /* * Given the inode btree roots described by *fab, find the roots, check them * for sanity, and pass the root data back out via *fab. */ STATIC int xrep_agi_find_btrees( - struct xfs_scrub *sc, - struct xrep_find_ag_btree *fab) + struct xrep_agi *ragi) { + struct xfs_scrub *sc = ragi->sc; + struct xrep_find_ag_btree *fab = ragi->fab; struct xfs_buf *agf_bp; struct xfs_mount *mp = sc->mp; int error; @@ -837,10 +851,11 @@ xrep_agi_find_btrees( */ STATIC void xrep_agi_init_header( - struct xfs_scrub *sc, - struct xfs_buf *agi_bp, - struct xfs_agi *old_agi) + struct xrep_agi *ragi) { + struct xfs_scrub *sc = ragi->sc; + struct xfs_buf *agi_bp = ragi->agi_bp; + struct xfs_agi *old_agi = &ragi->old_agi; struct xfs_agi *agi = agi_bp->b_addr; struct xfs_perag *pag = sc->sa.pag; struct xfs_mount *mp = sc->mp; @@ -868,10 +883,12 @@ xrep_agi_init_header( /* Set btree root information in an AGI. */ STATIC void xrep_agi_set_roots( - struct xfs_scrub *sc, - struct xfs_agi *agi, - struct xrep_find_ag_btree *fab) + struct xrep_agi *ragi) { + struct xfs_scrub *sc = ragi->sc; + struct xfs_agi *agi = ragi->agi_bp->b_addr; + struct xrep_find_ag_btree *fab = ragi->fab; + agi->agi_root = cpu_to_be32(fab[XREP_AGI_INOBT].root); agi->agi_level = cpu_to_be32(fab[XREP_AGI_INOBT].height); @@ -884,9 +901,10 @@ xrep_agi_set_roots( /* Update the AGI counters. */ STATIC int xrep_agi_calc_from_btrees( - struct xfs_scrub *sc, - struct xfs_buf *agi_bp) + struct xrep_agi *ragi) { + struct xfs_scrub *sc = ragi->sc; + struct xfs_buf *agi_bp = ragi->agi_bp; struct xfs_btree_cur *cur; struct xfs_agi *agi = agi_bp->b_addr; struct xfs_mount *mp = sc->mp; @@ -931,9 +949,10 @@ xrep_agi_calc_from_btrees( /* Trigger reinitialization of the in-core data. */ STATIC int xrep_agi_commit_new( - struct xfs_scrub *sc, - struct xfs_buf *agi_bp) + struct xrep_agi *ragi) { + struct xfs_scrub *sc = ragi->sc; + struct xfs_buf *agi_bp = ragi->agi_bp; struct xfs_perag *pag; struct xfs_agi *agi = agi_bp->b_addr; @@ -956,33 +975,36 @@ xrep_agi_commit_new( /* Repair the AGI. */ int xrep_agi( - struct xfs_scrub *sc) + struct xfs_scrub *sc) { - struct xrep_find_ag_btree fab[XREP_AGI_MAX] = { - [XREP_AGI_INOBT] = { - .rmap_owner = XFS_RMAP_OWN_INOBT, - .buf_ops = &xfs_inobt_buf_ops, - .maxlevels = M_IGEO(sc->mp)->inobt_maxlevels, - }, - [XREP_AGI_FINOBT] = { - .rmap_owner = XFS_RMAP_OWN_INOBT, - .buf_ops = &xfs_finobt_buf_ops, - .maxlevels = M_IGEO(sc->mp)->inobt_maxlevels, - }, - [XREP_AGI_END] = { - .buf_ops = NULL - }, - }; - struct xfs_agi old_agi; - struct xfs_mount *mp = sc->mp; - struct xfs_buf *agi_bp; - struct xfs_agi *agi; - int error; + struct xrep_agi *ragi; + struct xfs_mount *mp = sc->mp; + int error; /* We require the rmapbt to rebuild anything. */ if (!xfs_has_rmapbt(mp)) return -EOPNOTSUPP; + sc->buf = kzalloc(sizeof(struct xrep_agi), XCHK_GFP_FLAGS); + if (!sc->buf) + return -ENOMEM; + ragi = sc->buf; + ragi->sc = sc; + + ragi->fab[XREP_AGI_INOBT] = (struct xrep_find_ag_btree){ + .rmap_owner = XFS_RMAP_OWN_INOBT, + .buf_ops = &xfs_inobt_buf_ops, + .maxlevels = M_IGEO(sc->mp)->inobt_maxlevels, + }; + ragi->fab[XREP_AGI_FINOBT] = (struct xrep_find_ag_btree){ + .rmap_owner = XFS_RMAP_OWN_INOBT, + .buf_ops = &xfs_finobt_buf_ops, + .maxlevels = M_IGEO(sc->mp)->inobt_maxlevels, + }; + ragi->fab[XREP_AGI_END] = (struct xrep_find_ag_btree){ + .buf_ops = NULL, + }; + /* * Make sure we have the AGI buffer, as scrub might have decided it * was corrupt after xfs_ialloc_read_agi failed with -EFSCORRUPTED. @@ -990,14 +1012,13 @@ xrep_agi( error = xfs_trans_read_buf(mp, sc->tp, mp->m_ddev_targp, XFS_AG_DADDR(mp, sc->sa.pag->pag_agno, XFS_AGI_DADDR(mp)), - XFS_FSS_TO_BB(mp, 1), 0, &agi_bp, NULL); + XFS_FSS_TO_BB(mp, 1), 0, &ragi->agi_bp, NULL); if (error) return error; - agi_bp->b_ops = &xfs_agi_buf_ops; - agi = agi_bp->b_addr; + ragi->agi_bp->b_ops = &xfs_agi_buf_ops; /* Find the AGI btree roots. */ - error = xrep_agi_find_btrees(sc, fab); + error = xrep_agi_find_btrees(ragi); if (error) return error; @@ -1006,18 +1027,18 @@ xrep_agi( return error; /* Start rewriting the header and implant the btrees we found. */ - xrep_agi_init_header(sc, agi_bp, &old_agi); - xrep_agi_set_roots(sc, agi, fab); - error = xrep_agi_calc_from_btrees(sc, agi_bp); + xrep_agi_init_header(ragi); + xrep_agi_set_roots(ragi); + error = xrep_agi_calc_from_btrees(ragi); if (error) goto out_revert; /* Reinitialize in-core state. */ - return xrep_agi_commit_new(sc, agi_bp); + return xrep_agi_commit_new(ragi); out_revert: /* Mark the incore AGI state stale and revert the AGI. */ clear_bit(XFS_AGSTATE_AGI_INIT, &sc->sa.pag->pag_opstate); - memcpy(agi, &old_agi, sizeof(old_agi)); + memcpy(ragi->agi_bp->b_addr, &ragi->old_agi, sizeof(struct xfs_agi)); return error; }