From patchwork Wed Sep 26 10:14:59 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Allison Henderson X-Patchwork-Id: 10615563 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id CA730112B for ; Wed, 26 Sep 2018 10:17:37 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C1BB62A74A for ; Wed, 26 Sep 2018 10:17:37 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B5C7F2A76C; Wed, 26 Sep 2018 10:17:37 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8C03B2A74A for ; 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Wed, 26 Sep 2018 10:17:32 +0000 Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by userv0021.oracle.com (8.14.4/8.14.4) with ESMTP id w8QAHQ4L020445 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Wed, 26 Sep 2018 10:17:26 GMT Received: from abhmp0013.oracle.com (abhmp0013.oracle.com [141.146.116.19]) by aserv0121.oracle.com (8.14.4/8.13.8) with ESMTP id w8QAHQxV027759 for ; Wed, 26 Sep 2018 10:17:26 GMT Received: from localhost.localdomain (/70.176.225.12) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Wed, 26 Sep 2018 03:17:26 -0700 From: Allison Henderson To: linux-xfs@vger.kernel.org Subject: [PATCH v9 20/28] xfs: parent pointer attribute creation Date: Wed, 26 Sep 2018 03:14:59 -0700 Message-Id: <1537956907-10244-21-git-send-email-allison.henderson@oracle.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1537956907-10244-1-git-send-email-allison.henderson@oracle.com> References: <1537956907-10244-1-git-send-email-allison.henderson@oracle.com> X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=9027 signatures=668707 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=1 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1809260103 Sender: linux-xfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-xfs@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Dave Chinner Add parent pointer attribute during xfs_create, and subroutines to initialize attributes [bfoster: rebase, use VFS inode generation] [achender: rebased, changed __unint32_t to xfs_dir2_dataptr_t, fixed some null pointer bugs, merged error handling patch, added subroutines to handle attribute initialization, remove unnecessary ENOSPC handling in xfs_attr_set_first_parent] Signed-off-by: Dave Chinner Signed-off-by: Allison Henderson --- fs/xfs/Makefile | 2 + fs/xfs/libxfs/xfs_parent.c | 187 +++++++++++++++++++++++++++++++++++++++++++++ fs/xfs/libxfs/xfs_parent.h | 35 +++++++++ fs/xfs/xfs_inode.c | 17 ++++- fs/xfs/xfs_parent_utils.c | 52 +++++++++++++ fs/xfs/xfs_parent_utils.h | 26 +++++++ 6 files changed, 317 insertions(+), 2 deletions(-) diff --git a/fs/xfs/Makefile b/fs/xfs/Makefile index 022e0b4..45a3360 100644 --- a/fs/xfs/Makefile +++ b/fs/xfs/Makefile @@ -42,6 +42,7 @@ xfs-y += $(addprefix libxfs/, \ xfs_inode_fork.o \ xfs_inode_buf.o \ xfs_log_rlimit.o \ + xfs_parent.o \ xfs_ag_resv.o \ xfs_rmap.o \ xfs_rmap_btree.o \ @@ -82,6 +83,7 @@ xfs-y += xfs_aops.o \ xfs_message.o \ xfs_mount.o \ xfs_mru_cache.o \ + xfs_parent_utils.o \ xfs_reflink.o \ xfs_stats.o \ xfs_super.o \ diff --git a/fs/xfs/libxfs/xfs_parent.c b/fs/xfs/libxfs/xfs_parent.c new file mode 100644 index 0000000..c82caf0 --- /dev/null +++ b/fs/xfs/libxfs/xfs_parent.c @@ -0,0 +1,187 @@ +/* + * Copyright (c) 2015 Red Hat, Inc. + * All rights reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it would be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write the Free Software Foundation + */ +#include "xfs.h" +#include "xfs_fs.h" +#include "xfs_format.h" +#include "xfs_da_format.h" +#include "xfs_log_format.h" +#include "xfs_shared.h" +#include "xfs_trans_resv.h" +#include "xfs_mount.h" +#include "xfs_bmap_btree.h" +#include "xfs_inode.h" +#include "xfs_error.h" +#include "xfs_trace.h" +#include "xfs_trans.h" +#include "xfs_da_btree.h" +#include "xfs_attr.h" +#include "xfs_da_btree.h" +#include "xfs_attr_sf.h" +#include "xfs_bmap.h" + +/* + * Parent pointer attribute handling. + * + * Because the attribute value is a filename component, it will never be longer + * than 255 bytes. This means the attribute will always be a local format + * attribute as it is xfs_attr_leaf_entsize_local_max() for v5 filesystems will + * always be larger than this (max is 75% of block size). + * + * Creating a new parent attribute will always create a new attribute - there + * should never, ever be an existing attribute in the tree for a new inode. + * ENOSPC behaviour is problematic - creating the inode without the parent + * pointer is effectively a corruption, so we allow parent attribute creation + * to dip into the reserve block pool to avoid unexpected ENOSPC errors from + * occurring. + */ + + +/* Initializes a xfs_parent_name_rec to be stored as an attribute name */ +void +xfs_init_parent_name_rec( + struct xfs_parent_name_rec *rec, + struct xfs_inode *ip, + uint32_t p_diroffset) +{ + xfs_ino_t p_ino = ip->i_ino; + uint32_t p_gen = VFS_I(ip)->i_generation; + + rec->p_ino = cpu_to_be64(p_ino); + rec->p_gen = cpu_to_be32(p_gen); + rec->p_diroffset = cpu_to_be32(p_diroffset); +} + +/* Initializes a xfs_parent_name_irec from an xfs_parent_name_rec */ +void +xfs_init_parent_name_irec( + struct xfs_parent_name_irec *irec, + struct xfs_parent_name_rec *rec) +{ + irec->p_ino = be64_to_cpu(rec->p_ino); + irec->p_gen = be32_to_cpu(rec->p_gen); + irec->p_diroffset = be32_to_cpu(rec->p_diroffset); +} + +/* + * Directly add a parent pointer instead of as a deferred operation + * Currently only used during protofile creation + */ +int +xfs_parent_add( + struct xfs_inode *parent, + struct xfs_inode *child, + struct xfs_name *child_name, + uint32_t diroffset) +{ + struct xfs_parent_name_rec rec; + int error, err2; + struct xfs_da_args args; + int local = 0; + int rsvd = 0; + struct xfs_buf *leaf_bp = NULL; + struct xfs_trans_res tres; + struct xfs_mount *mp = child->i_mount; + xfs_attr_state_t state = 0; + int flags = ATTR_PARENT; + + xfs_init_parent_name_rec(&rec, parent, diroffset); + + error = xfs_attr_args_init(&args, child, (const unsigned char *)&rec, + sizeof(rec), flags); + if (error) + return error; + + args.hashval = xfs_da_hashname(args.name, args.namelen); + args.flags = flags; + args.value = (uint8_t *)child_name->name; + args.valuelen = child_name->len; + args.op_flags = XFS_DA_OP_OKNOENT | XFS_DA_OP_ADDNAME; + args.total = xfs_attr_calc_size(&args, &local); + + tres.tr_logres = M_RES(mp)->tr_attrsetm.tr_logres + + M_RES(mp)->tr_attrsetrt.tr_logres * args.total; + tres.tr_logcount = XFS_ATTRSET_LOG_COUNT; + tres.tr_logflags = XFS_TRANS_PERM_LOG_RES; + + /* + * Root fork attributes can use reserved data blocks for this + * operation if necessary + */ + error = xfs_trans_alloc(mp, &tres, args.total, 0, + rsvd ? XFS_TRANS_RESERVE : 0, &args.trans); + if (error) + goto out; + + /* + * If the inode doesn't have an attribute fork, add one. + * (inode must not be locked when we call this routine) + */ + if (XFS_IFORK_Q(child) == 0) { + int sf_size = sizeof(xfs_attr_sf_hdr_t) + + XFS_ATTR_SF_ENTSIZE_BYNAME(args.namelen, + args.valuelen); + + error = xfs_bmap_add_attrfork(child, sf_size, rsvd); + if (error) + return error; + } + + xfs_trans_ijoin(args.trans, child, 0); + + do { + leaf_bp = NULL; + + error = xfs_attr_set_args(&args, &leaf_bp, + &state); + if (error && error != -EAGAIN) + goto out; + + xfs_trans_log_inode(args.trans, child, + XFS_ILOG_CORE | XFS_ILOG_ADATA); + + err2 = xfs_trans_commit(args.trans); + if (err2) { + error = err2; + goto out; + } + + if (error == -EAGAIN) { + err2 = xfs_trans_alloc(mp, &tres, args.total, 0, + XFS_TRANS_PERM_LOG_RES, &args.trans); + if (err2) { + error = err2; + goto out; + } + xfs_trans_ijoin(args.trans, child, 0); + } + } while (error == -EAGAIN); + + if (leaf_bp) + xfs_trans_brelse(args.trans, leaf_bp); + + xfs_trans_log_inode(args.trans, child, XFS_ILOG_CORE); + + return error; + +out: + if (args.trans) + xfs_trans_cancel(args.trans); + + return error; +} + + diff --git a/fs/xfs/libxfs/xfs_parent.h b/fs/xfs/libxfs/xfs_parent.h new file mode 100644 index 0000000..60f1172 --- /dev/null +++ b/fs/xfs/libxfs/xfs_parent.h @@ -0,0 +1,35 @@ +/* + * Copyright (c) 2018 Oracle, Inc. + * All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it would be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write the Free Software Foundation Inc. + */ +#ifndef __XFS_PARENT_H__ +#define __XFS_PARENT_H__ + +#include "xfs_da_format.h" +#include "xfs_format.h" + +/* + * Parent pointer attribute prototypes + */ +void xfs_init_parent_name_rec(struct xfs_parent_name_rec *rec, + struct xfs_inode *ip, + uint32_t p_diroffset); +void xfs_init_parent_name_irec(struct xfs_parent_name_irec *irec, + struct xfs_parent_name_rec *rec); + +int xfs_parent_add(struct xfs_inode *parent, + struct xfs_inode *child, struct xfs_name *child_name, + uint32_t diroffset); +#endif /* __XFS_PARENT_H__ */ diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c index d7e06c2..3f722e6 100644 --- a/fs/xfs/xfs_inode.c +++ b/fs/xfs/xfs_inode.c @@ -41,6 +41,7 @@ #include "xfs_bmap_btree.h" #include "xfs_reflink.h" #include "xfs_dir2_priv.h" +#include "xfs_parent_utils.h" kmem_zone_t *xfs_inode_zone; @@ -1151,6 +1152,7 @@ xfs_create( struct xfs_dquot *pdqp = NULL; struct xfs_trans_res *tres; uint resblks; + xfs_dir2_dataptr_t diroffset; trace_xfs_create(dp, name); @@ -1219,13 +1221,13 @@ xfs_create( * the transaction cancel unlocking dp so don't do it explicitly in the * error path. */ - xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); + xfs_trans_ijoin(tp, dp, 0); unlock_dp_on_error = false; error = xfs_dir_createname(tp, dp, name, ip->i_ino, resblks ? resblks - XFS_IALLOC_SPACE_RES(mp) : 0, - NULL); + &diroffset); if (error) { ASSERT(error != -ENOSPC); goto out_trans_cancel; @@ -1244,6 +1246,16 @@ xfs_create( } /* + * If we have parent pointers, we need to add the attribute containing + * the parent information now. + */ + if (xfs_sb_version_hasparent(&mp->m_sb)) { + error = xfs_parent_add_deferred(dp, tp, ip, name, diroffset); + if (error) + goto out_trans_cancel; + } + + /* * If this is a synchronous mount, make sure that the * create transaction goes to disk before returning to * the user. @@ -1268,6 +1280,7 @@ xfs_create( *ipp = ip; xfs_iunlock(ip, XFS_ILOCK_EXCL); + xfs_iunlock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT); return 0; out_trans_cancel: diff --git a/fs/xfs/xfs_parent_utils.c b/fs/xfs/xfs_parent_utils.c new file mode 100644 index 0000000..8cfeb7e --- /dev/null +++ b/fs/xfs/xfs_parent_utils.c @@ -0,0 +1,52 @@ +/* + * Copyright (c) 2015 Red Hat, Inc. + * All rights reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it would be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write the Free Software Foundation + */ +#include "xfs.h" +#include "xfs_fs.h" +#include "xfs_format.h" +#include "xfs_log_format.h" +#include "xfs_shared.h" +#include "xfs_trans_resv.h" +#include "xfs_mount.h" +#include "xfs_bmap_btree.h" +#include "xfs_inode.h" +#include "xfs_error.h" +#include "xfs_trace.h" +#include "xfs_trans.h" +#include "xfs_da_format.h" +#include "xfs_da_btree.h" +#include "xfs_attr.h" +#include "xfs_parent.h" + +/* + * Add a parent record to an inode with existing parent records. + */ +int +xfs_parent_add_deferred( + struct xfs_inode *parent, + struct xfs_trans *tp, + struct xfs_inode *child, + struct xfs_name *child_name, + uint32_t diroffset) +{ + struct xfs_parent_name_rec rec; + + xfs_init_parent_name_rec(&rec, parent, diroffset); + + return xfs_attr_set_deferred(child, tp, (const char *)&rec, sizeof(rec), + child_name->name, child_name->len, ATTR_PARENT); +} + diff --git a/fs/xfs/xfs_parent_utils.h b/fs/xfs/xfs_parent_utils.h new file mode 100644 index 0000000..82453d2 --- /dev/null +++ b/fs/xfs/xfs_parent_utils.h @@ -0,0 +1,26 @@ +/* + * Copyright (c) 2017 Oracle, Inc. + * All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it would be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write the Free Software Foundation Inc. + */ +#ifndef __XFS_PARENT_UTILS_H__ +#define __XFS_PARENT_UTILS_H__ + +/* + * Parent pointer attribute prototypes + */ +int xfs_parent_add_deferred(struct xfs_inode *parent, struct xfs_trans *tp, + struct xfs_inode *child, struct xfs_name *child_name, + uint32_t diroffset); +#endif /* __XFS_PARENT_UTILS_H__ */