From patchwork Fri Nov 17 18:21:30 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Allison Henderson X-Patchwork-Id: 10063231 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id E6D986023A for ; Fri, 17 Nov 2017 18:27:08 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D4B132ACAE for ; Fri, 17 Nov 2017 18:27:08 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C9A8B2ACC6; Fri, 17 Nov 2017 18:27:08 +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=-6.9 required=2.0 tests=BAYES_00, 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 AC5112ACC2 for ; Fri, 17 Nov 2017 18:27:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760319AbdKQS1F (ORCPT ); Fri, 17 Nov 2017 13:27:05 -0500 Received: from userp1040.oracle.com ([156.151.31.81]:16736 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752631AbdKQSYG (ORCPT ); Fri, 17 Nov 2017 13:24:06 -0500 Received: from aserv0021.oracle.com (aserv0021.oracle.com [141.146.126.233]) by userp1040.oracle.com (Sentrion-MTA-4.3.2/Sentrion-MTA-4.3.2) with ESMTP id vAHIO4T2023329 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Fri, 17 Nov 2017 18:24:05 GMT Received: from userv0121.oracle.com (userv0121.oracle.com [156.151.31.72]) by aserv0021.oracle.com (8.14.4/8.14.4) with ESMTP id vAHIO3LK007646 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Fri, 17 Nov 2017 18:24:04 GMT Received: from abhmp0003.oracle.com (abhmp0003.oracle.com [141.146.116.9]) by userv0121.oracle.com (8.14.4/8.13.8) with ESMTP id vAHIO3iD009044 for ; Fri, 17 Nov 2017 18:24:03 GMT Received: from localhost.localdomain (/72.210.40.165) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Fri, 17 Nov 2017 10:24:03 -0800 From: Allison Henderson To: linux-xfs@vger.kernel.org Cc: Allison Henderson Subject: [PATCH v3 02/17] Set up infastructure for deferred attribute operations Date: Fri, 17 Nov 2017 11:21:30 -0700 Message-Id: <1510942905-12897-3-git-send-email-allison.henderson@oracle.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1510942905-12897-1-git-send-email-allison.henderson@oracle.com> References: <1510942905-12897-1-git-send-email-allison.henderson@oracle.com> X-Source-IP: aserv0021.oracle.com [141.146.126.233] 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 This patch adds two new log item types for setting or removing attributes as deferred operations. The xfs_attri_log_item logs an intent to set or remove an attribute. The corresponding xfs_attrd_log_item holds a reference to the xfs_attri_log_item and is freed once the transaction is done. Both log items use a generic xfs_attr_log_format structure that contains the attribute name, value, flags, inode, and an op_flag that indicates if the operations is a set or remove. At the moment, this feature will only be used by the parent pointer patch set which uses attributes to store information about an inodes parent. Signed-off-by: Allison Henderson --- fs/xfs/Makefile | 2 + fs/xfs/libxfs/xfs_attr.c | 3 +- fs/xfs/libxfs/xfs_defer.h | 1 + fs/xfs/libxfs/xfs_log_format.h | 37 ++- fs/xfs/libxfs/xfs_types.h | 1 + fs/xfs/xfs_attr.h | 22 +- fs/xfs/xfs_attr_item.c | 513 +++++++++++++++++++++++++++++++++++++++++ fs/xfs/xfs_attr_item.h | 117 ++++++++++ fs/xfs/xfs_log_recover.c | 140 +++++++++++ fs/xfs/xfs_super.c | 1 + fs/xfs/xfs_trans.h | 13 ++ fs/xfs/xfs_trans_attr.c | 288 +++++++++++++++++++++++ 12 files changed, 1134 insertions(+), 4 deletions(-) diff --git a/fs/xfs/Makefile b/fs/xfs/Makefile index a6e955b..ec6486b 100644 --- a/fs/xfs/Makefile +++ b/fs/xfs/Makefile @@ -106,6 +106,7 @@ xfs-y += xfs_log.o \ xfs_bmap_item.o \ xfs_buf_item.o \ xfs_extfree_item.o \ + xfs_attr_item.o \ xfs_icreate_item.o \ xfs_inode_item.o \ xfs_refcount_item.o \ @@ -115,6 +116,7 @@ xfs-y += xfs_log.o \ xfs_trans_bmap.o \ xfs_trans_buf.o \ xfs_trans_extfree.o \ + xfs_trans_attr.o \ xfs_trans_inode.o \ xfs_trans_refcount.o \ xfs_trans_rmap.o \ diff --git a/fs/xfs/libxfs/xfs_attr.c b/fs/xfs/libxfs/xfs_attr.c index e5f2960..716df0f 100644 --- a/fs/xfs/libxfs/xfs_attr.c +++ b/fs/xfs/libxfs/xfs_attr.c @@ -41,6 +41,7 @@ #include "xfs_quota.h" #include "xfs_trans_space.h" #include "xfs_trace.h" +#include "xfs_attr_item.h" /* * xfs_attr.c @@ -74,7 +75,7 @@ STATIC int xfs_attr_fillstate(xfs_da_state_t *state); STATIC int xfs_attr_refillstate(xfs_da_state_t *state); -STATIC int +int xfs_attr_args_init( struct xfs_da_args *args, struct xfs_inode *dp, diff --git a/fs/xfs/libxfs/xfs_defer.h b/fs/xfs/libxfs/xfs_defer.h index d4f046d..ef0f8bf 100644 --- a/fs/xfs/libxfs/xfs_defer.h +++ b/fs/xfs/libxfs/xfs_defer.h @@ -55,6 +55,7 @@ enum xfs_defer_ops_type { XFS_DEFER_OPS_TYPE_REFCOUNT, XFS_DEFER_OPS_TYPE_RMAP, XFS_DEFER_OPS_TYPE_FREE, + XFS_DEFER_OPS_TYPE_ATTR, XFS_DEFER_OPS_TYPE_MAX, }; diff --git a/fs/xfs/libxfs/xfs_log_format.h b/fs/xfs/libxfs/xfs_log_format.h index 71de185..cecc27e 100644 --- a/fs/xfs/libxfs/xfs_log_format.h +++ b/fs/xfs/libxfs/xfs_log_format.h @@ -116,7 +116,12 @@ static inline uint xlog_get_cycle(char *ptr) #define XLOG_REG_TYPE_CUD_FORMAT 24 #define XLOG_REG_TYPE_BUI_FORMAT 25 #define XLOG_REG_TYPE_BUD_FORMAT 26 -#define XLOG_REG_TYPE_MAX 26 +#define XLOG_REG_TYPE_ATTRI_FORMAT 27 +#define XLOG_REG_TYPE_ATTRD_FORMAT 28 +#define XLOG_REG_TYPE_ATTR_NAME 29 +#define XLOG_REG_TYPE_ATTR_VALUE 30 +#define XLOG_REG_TYPE_MAX 31 + /* * Flags to log operation header @@ -239,6 +244,8 @@ typedef struct xfs_trans_header { #define XFS_LI_CUD 0x1243 #define XFS_LI_BUI 0x1244 /* bmbt update intent */ #define XFS_LI_BUD 0x1245 +#define XFS_LI_ATTRI 0x1246 /* attr set/remove intent*/ +#define XFS_LI_ATTRD 0x1247 /* attr set/remove done */ #define XFS_LI_TYPE_DESC \ { XFS_LI_EFI, "XFS_LI_EFI" }, \ @@ -254,7 +261,9 @@ typedef struct xfs_trans_header { { XFS_LI_CUI, "XFS_LI_CUI" }, \ { XFS_LI_CUD, "XFS_LI_CUD" }, \ { XFS_LI_BUI, "XFS_LI_BUI" }, \ - { XFS_LI_BUD, "XFS_LI_BUD" } + { XFS_LI_BUD, "XFS_LI_BUD" }, \ + { XFS_LI_ATTRI, "XFS_LI_ATTRI" }, \ + { XFS_LI_ATTRD, "XFS_LI_ATTRD" } /* * Inode Log Item Format definitions. @@ -852,4 +861,28 @@ struct xfs_icreate_log { __be32 icl_gen; /* inode generation number to use */ }; +/* + * Flags for deferred attribute operations. + * Upper bits are flags, lower byte is type code + */ +#define XFS_ATTR_OP_FLAGS_SET 1 /* Set the attribute */ +#define XFS_ATTR_OP_FLAGS_REMOVE 2 /* Remove the attribute */ +#define XFS_ATTR_OP_FLAGS_TYPE_MASK 0x0FF /* Flags type mask */ + +/* + * This is the structure used to lay out an attr log item in the + * log. + */ +struct xfs_attr_log_format { + uint64_t alf_id; /* attri identifier */ + xfs_ino_t alf_ino; /* the inode for this attr operation */ + uint32_t alf_op_flags; /* marks the op as a set or remove */ + uint32_t alf_name_len; /* attr name length */ + uint32_t alf_value_len; /* attr value length */ + uint32_t alf_attr_flags; /* attr flags */ + uint16_t alf_type; /* attri log item type */ + uint16_t alf_size; /* size of this item */ + uint32_t alf_pad; /* pad to 64 bit aligned */ +}; + #endif /* __XFS_LOG_FORMAT_H__ */ diff --git a/fs/xfs/libxfs/xfs_types.h b/fs/xfs/libxfs/xfs_types.h index 0220159..5372063 100644 --- a/fs/xfs/libxfs/xfs_types.h +++ b/fs/xfs/libxfs/xfs_types.h @@ -23,6 +23,7 @@ typedef uint32_t prid_t; /* project ID */ typedef uint32_t xfs_agblock_t; /* blockno in alloc. group */ typedef uint32_t xfs_agino_t; /* inode # within allocation grp */ typedef uint32_t xfs_extlen_t; /* extent length in blocks */ +typedef uint32_t xfs_attrlen_t; /* attr length */ typedef uint32_t xfs_agnumber_t; /* allocation group number */ typedef int32_t xfs_extnum_t; /* # of extents in a file */ typedef int16_t xfs_aextnum_t; /* # extents in an attribute fork */ diff --git a/fs/xfs/xfs_attr.h b/fs/xfs/xfs_attr.h index 8542606..3ef3c77 100644 --- a/fs/xfs/xfs_attr.h +++ b/fs/xfs/xfs_attr.h @@ -18,6 +18,8 @@ #ifndef __XFS_ATTR_H__ #define __XFS_ATTR_H__ +#include "libxfs/xfs_defer.h" + struct xfs_inode; struct xfs_da_args; struct xfs_attr_list_context; @@ -87,6 +89,22 @@ typedef struct attrlist_ent { /* data from attr_list() */ } attrlist_ent_t; /* + * List of attrs to commit later. + */ +struct xfs_attr_item { + struct xfs_inode *xattri_ip; + uint32_t xattri_op_flags; + uint32_t xattri_value_len; /* length of name and val */ + uint32_t xattri_name_len; /* length of name */ + uint32_t xattri_flags; /* attr flags */ + struct list_head xattri_list; + char xattri_name_value[0]; +}; + +#define XFS_ATTR_ITEM_SIZEOF(namelen, valuelen) \ + (sizeof(struct xfs_attr_item) + (namelen) + (valuelen)) + +/* * Given a pointer to the (char*) buffer containing the attr_list() result, * and an index, return a pointer to the indicated attribute in the buffer. */ @@ -154,6 +172,8 @@ int xfs_attr_remove(struct xfs_inode *dp, const unsigned char *name, int flags); int xfs_attr_remove_args(struct xfs_da_args *args, int flags); int xfs_attr_list(struct xfs_inode *dp, char *buffer, int bufsize, int flags, struct attrlist_cursor_kern *cursor); - +int xfs_attr_args_init(struct xfs_da_args *args, struct xfs_inode *dp, + const unsigned char *name, int flags); +int xfs_attr_calc_size(struct xfs_da_args *args, int *local); #endif /* __XFS_ATTR_H__ */ diff --git a/fs/xfs/xfs_attr_item.c b/fs/xfs/xfs_attr_item.c new file mode 100644 index 0000000..0ba2a54 --- /dev/null +++ b/fs/xfs/xfs_attr_item.c @@ -0,0 +1,513 @@ +/* + * 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. + */ +#include "xfs.h" +#include "xfs_fs.h" +#include "xfs_format.h" +#include "xfs_log_format.h" +#include "xfs_trans_resv.h" +#include "xfs_bit.h" +#include "xfs_mount.h" +#include "xfs_trans.h" +#include "xfs_trans_priv.h" +#include "xfs_buf_item.h" +#include "xfs_attr_item.h" +#include "xfs_log.h" +#include "xfs_btree.h" +#include "xfs_rmap.h" +#include "xfs_inode.h" +#include "xfs_icache.h" + +static inline struct xfs_attri_log_item *ATTRI_ITEM(struct xfs_log_item *lip) +{ + return container_of(lip, struct xfs_attri_log_item, item); +} + +void +xfs_attri_item_free( + struct xfs_attri_log_item *attrip) +{ + kmem_free(attrip->item.li_lv_shadow); + kmem_free(attrip); +} + +/* + * This returns the number of iovecs needed to log the given attri item. + * We only need 1 iovec for an attri item. It just logs the attr_log_format + * structure. + */ +static inline int +xfs_attri_item_sizeof( + struct xfs_attri_log_item *attrip) +{ + return sizeof(struct xfs_attr_log_format); +} + +STATIC void +xfs_attri_item_size( + struct xfs_log_item *lip, + int *nvecs, + int *nbytes) +{ + struct xfs_attri_log_item *attrip = ATTRI_ITEM(lip); + + *nvecs += 1; + *nbytes += xfs_attri_item_sizeof(attrip); + + if (attrip->name_len > 0) { + *nvecs += 1; + nbytes += ATTR_NVEC_SIZE(attrip->name_len); + } + + if (attrip->value_len > 0) { + *nvecs += 1; + nbytes += ATTR_NVEC_SIZE(attrip->value_len); + } +} + +/* + * This is called to fill in the vector of log iovecs for the + * given attri log item. We use only 1 iovec, and we point that + * at the attri_log_format structure embedded in the attri item. + * It is at this point that we assert that all of the attr + * slots in the attri item have been filled. + */ +STATIC void +xfs_attri_item_format( + struct xfs_log_item *lip, + struct xfs_log_vec *lv) +{ + struct xfs_attri_log_item *attrip = ATTRI_ITEM(lip); + struct xfs_log_iovec *vecp = NULL; + + attrip->format.alf_type = XFS_LI_ATTRI; + attrip->format.alf_size = 1; + + xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_ATTRI_FORMAT, + &attrip->format, + xfs_attri_item_sizeof(attrip)); + if (attrip->name_len > 0) + xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_ATTR_NAME, + attrip->name, ATTR_NVEC_SIZE(attrip->name_len)); + + if (attrip->value_len > 0) + xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_ATTR_VALUE, + attrip->value, + ATTR_NVEC_SIZE(attrip->value_len)); +} + + +/* + * Pinning has no meaning for an attri item, so just return. + */ +STATIC void +xfs_attri_item_pin( + struct xfs_log_item *lip) +{ +} + +/* + * The unpin operation is the last place an ATTRI is manipulated in the log. It + * is either inserted in the AIL or aborted in the event of a log I/O error. In + * either case, the ATTRI transaction has been successfully committed to make it + * this far. Therefore, we expect whoever committed the ATTRI to either + * construct and commit the ATTRD or drop the ATTRD's reference in the event of + * error. Simply drop the log's ATTRI reference now that the log is done with + * it. + */ +STATIC void +xfs_attri_item_unpin( + struct xfs_log_item *lip, + int remove) +{ + struct xfs_attri_log_item *attrip = ATTRI_ITEM(lip); + + xfs_attri_release(attrip); +} + +/* + * attri items have no locking or pushing. However, since ATTRIs are pulled + * from the AIL when their corresponding ATTRDs are committed to disk, their + * situation is very similar to being pinned. Return XFS_ITEM_PINNED so that + * the caller will eventually flush the log. This should help in getting the + * ATTRI out of the AIL. + */ +STATIC uint +xfs_attri_item_push( + struct xfs_log_item *lip, + struct list_head *buffer_list) +{ + return XFS_ITEM_PINNED; +} + +/* + * The ATTRI has been either committed or aborted if the transaction has been + * cancelled. If the transaction was cancelled, an ATTRD isn't going to be + * constructed and thus we free the ATTRI here directly. + */ +STATIC void +xfs_attri_item_unlock( + struct xfs_log_item *lip) +{ + if (lip->li_flags & XFS_LI_ABORTED) + xfs_attri_item_free(ATTRI_ITEM(lip)); +} + +/* + * The ATTRI is logged only once and cannot be moved in the log, so simply + * return the lsn at which it's been logged. + */ +STATIC xfs_lsn_t +xfs_attri_item_committed( + struct xfs_log_item *lip, + xfs_lsn_t lsn) +{ + return lsn; +} + +STATIC void +xfs_attri_item_committing( + struct xfs_log_item *lip, + xfs_lsn_t lsn) +{ +} + +/* + * This is the ops vector shared by all attri log items. + */ +static const struct xfs_item_ops xfs_attri_item_ops = { + .iop_size = xfs_attri_item_size, + .iop_format = xfs_attri_item_format, + .iop_pin = xfs_attri_item_pin, + .iop_unpin = xfs_attri_item_unpin, + .iop_unlock = xfs_attri_item_unlock, + .iop_committed = xfs_attri_item_committed, + .iop_push = xfs_attri_item_push, + .iop_committing = xfs_attri_item_committing +}; + + +/* + * Allocate and initialize an attri item + */ +struct xfs_attri_log_item * +xfs_attri_init( + struct xfs_mount *mp) + +{ + struct xfs_attri_log_item *attrip; + uint size; + + size = (uint)(sizeof(struct xfs_attri_log_item)); + attrip = kmem_zalloc(size, KM_SLEEP); + + xfs_log_item_init(mp, &(attrip->item), XFS_LI_ATTRI, + &xfs_attri_item_ops); + attrip->format.alf_id = (uintptr_t)(void *)attrip; + atomic_set(&attrip->refcount, 2); + + return attrip; +} + +/* + * Copy an attr format buffer from the given buf, and into the destination + * attr format structure. + */ +int +xfs_attr_copy_format(struct xfs_log_iovec *buf, + struct xfs_attr_log_format *dst_attr_fmt) +{ + struct xfs_attr_log_format *src_attr_fmt = buf->i_addr; + uint len = sizeof(struct xfs_attr_log_format); + + if (buf->i_len == len) { + memcpy((char *)dst_attr_fmt, (char *)src_attr_fmt, len); + return 0; + } + return -EFSCORRUPTED; +} + +/* + * Freeing the attri requires that we remove it from the AIL if it has already + * been placed there. However, the ATTRI may not yet have been placed in the + * AIL when called by xfs_attri_release() from ATTRD processing due to the + * ordering of committed vs unpin operations in bulk insert operations. Hence + * the reference count to ensure only the last caller frees the ATTRI. + */ +void +xfs_attri_release( + struct xfs_attri_log_item *attrip) +{ + ASSERT(atomic_read(&attrip->refcount) > 0); + if (atomic_dec_and_test(&attrip->refcount)) { + xfs_trans_ail_remove(&attrip->item, + SHUTDOWN_LOG_IO_ERROR); + xfs_attri_item_free(attrip); + } +} + +static inline struct xfs_attrd_log_item *ATTRD_ITEM(struct xfs_log_item *lip) +{ + return container_of(lip, struct xfs_attrd_log_item, item); +} + +STATIC void +xfs_attrd_item_free(struct xfs_attrd_log_item *attrdp) +{ + kmem_free(attrdp->item.li_lv_shadow); + kmem_free(attrdp); +} + +/* + * This returns the number of iovecs needed to log the given attrd item. + * We only need 1 iovec for an attrd item. It just logs the attr_log_format + * structure. + */ +static inline int +xfs_attrd_item_sizeof( + struct xfs_attrd_log_item *attrdp) +{ + return sizeof(struct xfs_attr_log_format); +} + +STATIC void +xfs_attrd_item_size( + struct xfs_log_item *lip, + int *nvecs, + int *nbytes) +{ + struct xfs_attrd_log_item *attrdp = ATTRD_ITEM(lip); + *nvecs += 1; + *nbytes += xfs_attrd_item_sizeof(attrdp); + + if (attrdp->name_len > 0) { + *nvecs += 1; + nbytes += attrdp->name_len; + } + + if (attrdp->value_len > 0) { + *nvecs += 1; + nbytes += attrdp->value_len; + } +} + +/* + * This is called to fill in the vector of log iovecs for the + * given attrd log item. We use only 1 iovec, and we point that + * at the attr_log_format structure embedded in the attrd item. + * It is at this point that we assert that all of the attr + * slots in the attrd item have been filled. + */ +STATIC void +xfs_attrd_item_format( + struct xfs_log_item *lip, + struct xfs_log_vec *lv) +{ + struct xfs_attrd_log_item *attrdp = ATTRD_ITEM(lip); + struct xfs_log_iovec *vecp = NULL; + + attrdp->format.alf_type = XFS_LI_ATTRD; + attrdp->format.alf_size = 1; + + xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_ATTRD_FORMAT, + &attrdp->format, + xfs_attrd_item_sizeof(attrdp)); +} + +/* + * Pinning has no meaning for an attrd item, so just return. + */ +STATIC void +xfs_attrd_item_pin( + struct xfs_log_item *lip) +{ +} + +/* + * Since pinning has no meaning for an attrd item, unpinning does + * not either. + */ +STATIC void +xfs_attrd_item_unpin( + struct xfs_log_item *lip, + int remove) +{ +} + +/* + * There isn't much you can do to push on an attrd item. It is simply stuck + * waiting for the log to be flushed to disk. + */ +STATIC uint +xfs_attrd_item_push( + struct xfs_log_item *lip, + struct list_head *buffer_list) +{ + return XFS_ITEM_PINNED; +} + +/* + * The ATTRD is either committed or aborted if the transaction is cancelled. If + * the transaction is cancelled, drop our reference to the ATTRI and free the + * ATTRD. + */ +STATIC void +xfs_attrd_item_unlock( + struct xfs_log_item *lip) +{ + struct xfs_attrd_log_item *attrdp = ATTRD_ITEM(lip); + + if (lip->li_flags & XFS_LI_ABORTED) { + xfs_attri_release(attrdp->attrip); + xfs_attrd_item_free(attrdp); + } +} + +/* + * When the attrd item is committed to disk, all we need to do is delete our + * reference to our partner attri item and then free ourselves. Since we're + * freeing ourselves we must return -1 to keep the transaction code from + * further referencing this item. + */ +STATIC xfs_lsn_t +xfs_attrd_item_committed( + struct xfs_log_item *lip, + xfs_lsn_t lsn) +{ + struct xfs_attrd_log_item *attrdp = ATTRD_ITEM(lip); + + /* + * Drop the ATTRI reference regardless of whether the ATTRD has been + * aborted. Once the ATTRD transaction is constructed, it is the sole + * responsibility of the ATTRD to release the ATTRI (even if the ATTRI + * is aborted due to log I/O error). + */ + xfs_attri_release(attrdp->attrip); + xfs_attrd_item_free(attrdp); + + return (xfs_lsn_t)-1; +} + +STATIC void +xfs_attrd_item_committing( + struct xfs_log_item *lip, + xfs_lsn_t lsn) +{ +} + +/* + * This is the ops vector shared by all attrd log items. + */ +static const struct xfs_item_ops xfs_attrd_item_ops = { + .iop_size = xfs_attrd_item_size, + .iop_format = xfs_attrd_item_format, + .iop_pin = xfs_attrd_item_pin, + .iop_unpin = xfs_attrd_item_unpin, + .iop_unlock = xfs_attrd_item_unlock, + .iop_committed = xfs_attrd_item_committed, + .iop_push = xfs_attrd_item_push, + .iop_committing = xfs_attrd_item_committing +}; + +/* + * Allocate and initialize an attrd item + */ +struct xfs_attrd_log_item * +xfs_attrd_init( + struct xfs_mount *mp, + struct xfs_attri_log_item *attrip) + +{ + struct xfs_attrd_log_item *attrdp; + uint size; + + size = (uint)(sizeof(struct xfs_attrd_log_item)); + attrdp = kmem_zalloc(size, KM_SLEEP); + + xfs_log_item_init(mp, &attrdp->item, XFS_LI_ATTRD, + &xfs_attrd_item_ops); + attrdp->attrip = attrip; + attrdp->format.alf_id = attrip->format.alf_id; + + return attrdp; +} + +/* + * Process an attr intent item that was recovered from + * the log. We need to delete the attr that it describes. + */ +int +xfs_attri_recover( + struct xfs_mount *mp, + struct xfs_attri_log_item *attrip) +{ + struct xfs_inode *ip; + struct xfs_attrd_log_item *attrdp; + struct xfs_trans *tp; + int error = 0; + struct xfs_attr_log_format *attrp; + + ASSERT(!test_bit(XFS_ATTRI_RECOVERED, &attrip->flags)); + + /* + * First check the validity of the attr described by the + * ATTRI. If any are bad, then assume that all are bad and + * just toss the ATTRI. A valid attr must have a name length, + * a value length, and either a "set" or "remove" op flag + */ + attrp = &attrip->format; + if (attrp->alf_value_len == 0 || + attrp->alf_name_len == 0 || + !(attrp->alf_op_flags == XFS_ATTR_OP_FLAGS_SET || + attrp->alf_op_flags == XFS_ATTR_OP_FLAGS_REMOVE) ) { + /* + * This will pull the ATTRI from the AIL and + * free the memory associated with it. + */ + set_bit(XFS_ATTRI_RECOVERED, &attrip->flags); + xfs_attri_release(attrip); + return -EIO; + } + + error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate, 0, 0, 0, &tp); + if (error) + return error; + attrdp = xfs_trans_get_attrd(tp, attrip); + attrp = &attrip->format; + + error = xfs_iget(mp, tp, attrp->alf_ino, 0, 0, &ip); + if (error) + return error; + + error = xfs_trans_attr(tp, attrdp, ip, + attrp->alf_op_flags, + attrp->alf_attr_flags, + attrp->alf_name_len, + attrp->alf_value_len, + attrip->name, + attrip->value); + if (error) + goto abort_error; + + + set_bit(XFS_ATTRI_RECOVERED, &attrip->flags); + error = xfs_trans_commit(tp); + return error; + +abort_error: + xfs_trans_cancel(tp); + return error; +} diff --git a/fs/xfs/xfs_attr_item.h b/fs/xfs/xfs_attr_item.h new file mode 100644 index 0000000..774b56e --- /dev/null +++ b/fs/xfs/xfs_attr_item.h @@ -0,0 +1,117 @@ +/* + * 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_ATTR_ITEM_H__ +#define __XFS_ATTR_ITEM_H__ + +/* kernel only ATTRI/ATTRD definitions */ + +struct xfs_mount; +struct kmem_zone; + +/* + * Max number of attrs in fast allocation path. + */ +#define XFS_ATTRI_MAX_FAST_ATTRS 1 + + +/* + * Define ATTR flag bits. Manipulated by set/clear/test_bit operators. + */ +#define XFS_ATTRI_RECOVERED 1 + + +/* nvecs must be in multiples of 4 */ +#define ATTR_NVEC_SIZE(size) (size == sizeof(int32_t) ? sizeof(int32_t) : \ + size + sizeof(int32_t) - \ + (size % sizeof(int32_t))) + +/* + * This is the "attr intention" log item. It is used to log the fact + * that some attrs need to be processed. It is used in conjunction with the + * "attr done" log item described below. + * + * The ATTRI is reference counted so that it is not freed prior to both the + * ATTRI and ATTRD being committed and unpinned. This ensures the ATTRI is + * inserted into the AIL even in the event of out of order ATTRI/ATTRD + * processing. In other words, an ATTRI is born with two references: + * + * 1.) an ATTRI held reference to track ATTRI AIL insertion + * 2.) an ATTRD held reference to track ATTRD commit + * + * On allocation, both references are the responsibility of the caller. Once + * the ATTRI is added to and dirtied in a transaction, ownership of reference + * one transfers to the transaction. The reference is dropped once the ATTRI is + * inserted to the AIL or in the event of failure along the way (e.g., commit + * failure, log I/O error, etc.). Note that the caller remains responsible for + * the ATTRD reference under all circumstances to this point. The caller has no + * means to detect failure once the transaction is committed, however. + * Therefore, an ATTRD is required after this point, even in the event of + * unrelated failure. + * + * Once an ATTRD is allocated and dirtied in a transaction, reference two + * transfers to the transaction. The ATTRD reference is dropped once it reaches + * the unpin handler. Similar to the ATTRI, the reference also drops in the + * event of commit failure or log I/O errors. Note that the ATTRD is not + * inserted in the AIL, so at this point both the ATTI and ATTRD are freed. + */ +struct xfs_attri_log_item { + xfs_log_item_t item; + atomic_t refcount; + unsigned long flags; /* misc flags */ + int name_len; + void *name; + int value_len; + void *value; + struct xfs_attr_log_format format; +}; + +/* + * This is the "attr done" log item. It is used to log + * the fact that some attrs earlier mentioned in an attri item + * have been freed. + */ +struct xfs_attrd_log_item { + struct xfs_log_item item; + struct xfs_attri_log_item *attrip; + uint next_attr; + int name_len; + void *name; + int value_len; + void *value; + struct xfs_attr_log_format format; +}; + +/* + * Max number of attrs in fast allocation path. + */ +#define XFS_ATTRD_MAX_FAST_ATTRS 1 + +extern struct kmem_zone *xfs_attri_zone; +extern struct kmem_zone *xfs_attrd_zone; + +struct xfs_attri_log_item *xfs_attri_init(struct xfs_mount *mp); +struct xfs_attrd_log_item *xfs_attrd_init(struct xfs_mount *mp, + struct xfs_attri_log_item *attrip); +int xfs_attr_copy_format(struct xfs_log_iovec *buf, + struct xfs_attr_log_format *dst_attri_fmt); +void xfs_attri_item_free(struct xfs_attri_log_item *attrip); +void xfs_attri_release(struct xfs_attri_log_item *attrip); + +int xfs_attri_recover(struct xfs_mount *mp, + struct xfs_attri_log_item *attrip); + +#endif /* __XFS_ATTR_ITEM_H__ */ diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c index ee34899..fd0e052 100644 --- a/fs/xfs/xfs_log_recover.c +++ b/fs/xfs/xfs_log_recover.c @@ -33,6 +33,7 @@ #include "xfs_log_recover.h" #include "xfs_inode_item.h" #include "xfs_extfree_item.h" +#include "xfs_attr_item.h" #include "xfs_trans_priv.h" #include "xfs_alloc.h" #include "xfs_ialloc.h" @@ -1956,6 +1957,8 @@ xlog_recover_reorder_trans( case XFS_LI_CUD: case XFS_LI_BUI: case XFS_LI_BUD: + case XFS_LI_ATTRI: + case XFS_LI_ATTRD: trace_xfs_log_recover_item_reorder_tail(log, trans, item, pass); list_move_tail(&item->ri_list, &inode_list); @@ -3489,6 +3492,92 @@ xlog_recover_efd_pass2( return 0; } +STATIC int +xlog_recover_attri_pass2( + struct xlog *log, + struct xlog_recover_item *item, + xfs_lsn_t lsn) +{ + int error; + struct xfs_mount *mp = log->l_mp; + struct xfs_attri_log_item *attrip; + struct xfs_attr_log_format *attri_formatp; + + attri_formatp = item->ri_buf[0].i_addr; + + attrip = xfs_attri_init(mp); + error = xfs_attr_copy_format(&item->ri_buf[0], &attrip->format); + if (error) { + xfs_attri_item_free(attrip); + return error; + } + + spin_lock(&log->l_ailp->xa_lock); + /* + * The ATTRI has two references. One for the ATTRD and one for ATTRI to + * ensure it makes it into the AIL. Insert the ATTRI into the AIL + * directly and drop the ATTRI reference. Note that + * xfs_trans_ail_update() drops the AIL lock. + */ + xfs_trans_ail_update(log->l_ailp, &attrip->item, lsn); + xfs_attri_release(attrip); + return 0; +} + + +/* + * This routine is called when an ATTRD format structure is found in a committed + * transaction in the log. Its purpose is to cancel the corresponding ATTRI if + * it was still in the log. To do this it searches the AIL for the ATTRI with + * an id equal to that in the ATTRD format structure. If we find it we drop + * the ATTRD reference, which removes the ATTRI from the AIL and frees it. + */ +STATIC int +xlog_recover_attrd_pass2( + struct xlog *log, + struct xlog_recover_item *item) +{ + struct xfs_attr_log_format *attrd_formatp; + struct xfs_attri_log_item *attrip = NULL; + struct xfs_log_item *lip; + uint64_t attri_id; + struct xfs_ail_cursor cur; + struct xfs_ail *ailp = log->l_ailp; + + attrd_formatp = item->ri_buf[0].i_addr; + ASSERT((item->ri_buf[0].i_len == + (sizeof(struct xfs_attr_log_format)))); + attri_id = attrd_formatp->alf_id; + + /* + * Search for the ATTRI with the id in the ATTRD format structure in the + * AIL. + */ + spin_lock(&ailp->xa_lock); + lip = xfs_trans_ail_cursor_first(ailp, &cur, 0); + while (lip != NULL) { + if (lip->li_type == XFS_LI_ATTRI) { + attrip = (struct xfs_attri_log_item *)lip; + if (attrip->format.alf_id == attri_id) { + /* + * Drop the ATTRD reference to the ATTRI. This + * removes the ATTRI from the AIL and frees it. + */ + spin_unlock(&ailp->xa_lock); + xfs_attri_release(attrip); + spin_lock(&ailp->xa_lock); + break; + } + } + lip = xfs_trans_ail_cursor_next(ailp, &cur); + } + + xfs_trans_ail_cursor_done(&cur); + spin_unlock(&ailp->xa_lock); + + return 0; +} + /* * This routine is called to create an in-core extent rmap update * item from the rui format structure which was logged on disk. @@ -4108,6 +4197,10 @@ xlog_recover_commit_pass2( return xlog_recover_efi_pass2(log, item, trans->r_lsn); case XFS_LI_EFD: return xlog_recover_efd_pass2(log, item); + case XFS_LI_ATTRI: + return xlog_recover_attri_pass2(log, item, trans->r_lsn); + case XFS_LI_ATTRD: + return xlog_recover_attrd_pass2(log, item); case XFS_LI_RUI: return xlog_recover_rui_pass2(log, item, trans->r_lsn); case XFS_LI_RUD: @@ -4669,6 +4762,49 @@ xlog_recover_cancel_efi( spin_lock(&ailp->xa_lock); } +/* Recover the ATTRI if necessary. */ +STATIC int +xlog_recover_process_attri( + struct xfs_mount *mp, + struct xfs_ail *ailp, + struct xfs_log_item *lip) +{ + struct xfs_attri_log_item *attrip; + int error; + + /* + * Skip ATTRIs that we've already processed. + */ + attrip = container_of(lip, struct xfs_attri_log_item, item); + if (test_bit(XFS_ATTRI_RECOVERED, &attrip->flags)) + return 0; + + spin_unlock(&ailp->xa_lock); + error = xfs_attri_recover(mp, attrip); + spin_lock(&ailp->xa_lock); + + return error; +} + +/* Release the ATTRI since we're cancelling everything. */ +STATIC void +xlog_recover_cancel_attri( + struct xfs_mount *mp, + struct xfs_ail *ailp, + struct xfs_log_item *lip) +{ + struct xfs_attri_log_item *attrip; + + attrip = container_of(lip, struct xfs_attri_log_item, item); + + spin_unlock(&ailp->xa_lock); + xfs_attri_release(attrip); + spin_lock(&ailp->xa_lock); +} + + + + /* Recover the RUI if necessary. */ STATIC int xlog_recover_process_rui( @@ -4861,6 +4997,10 @@ xlog_recover_process_intents( case XFS_LI_EFI: error = xlog_recover_process_efi(log->l_mp, ailp, lip); break; + case XFS_LI_ATTRI: + error = xlog_recover_process_attri(log->l_mp, + ailp, lip); + break; case XFS_LI_RUI: error = xlog_recover_process_rui(log->l_mp, ailp, lip); break; diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c index f663022..ee68459 100644 --- a/fs/xfs/xfs_super.c +++ b/fs/xfs/xfs_super.c @@ -2024,6 +2024,7 @@ init_xfs_fs(void) xfs_rmap_update_init_defer_op(); xfs_refcount_update_init_defer_op(); xfs_bmap_update_init_defer_op(); + xfs_attr_init_defer_op(); xfs_dir_startup(); diff --git a/fs/xfs/xfs_trans.h b/fs/xfs/xfs_trans.h index 815b53d2..e094b05 100644 --- a/fs/xfs/xfs_trans.h +++ b/fs/xfs/xfs_trans.h @@ -40,6 +40,9 @@ struct xfs_cud_log_item; struct xfs_defer_ops; struct xfs_bui_log_item; struct xfs_bud_log_item; +struct xfs_attrd_log_item; +struct xfs_attri_log_item; + typedef struct xfs_log_item { struct list_head li_ail; /* AIL pointers */ @@ -223,12 +226,22 @@ void xfs_trans_dirty_buf(struct xfs_trans *, struct xfs_buf *); void xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint); void xfs_extent_free_init_defer_op(void); +void xfs_attr_init_defer_op(void); + struct xfs_efd_log_item *xfs_trans_get_efd(struct xfs_trans *, struct xfs_efi_log_item *, uint); int xfs_trans_free_extent(struct xfs_trans *, struct xfs_efd_log_item *, xfs_fsblock_t, xfs_extlen_t, struct xfs_owner_info *); +struct xfs_attrd_log_item * +xfs_trans_get_attrd(struct xfs_trans *tp, + struct xfs_attri_log_item *attrip); +int xfs_trans_attr(struct xfs_trans *tp, struct xfs_attrd_log_item *attrdp, + struct xfs_inode *ip, uint32_t attr_op_flags, + uint32_t flags, uint32_t name_len, uint32_t value_len, + char *name, char *value); + int xfs_trans_commit(struct xfs_trans *); int xfs_trans_roll(struct xfs_trans **); int xfs_trans_roll_inode(struct xfs_trans **, struct xfs_inode *); diff --git a/fs/xfs/xfs_trans_attr.c b/fs/xfs/xfs_trans_attr.c new file mode 100644 index 0000000..7c3290f --- /dev/null +++ b/fs/xfs/xfs_trans_attr.c @@ -0,0 +1,288 @@ +/* + * 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. + */ +#include "xfs.h" +#include "xfs_fs.h" +#include "xfs_shared.h" +#include "xfs_format.h" +#include "xfs_log_format.h" +#include "xfs_trans_resv.h" +#include "xfs_bit.h" +#include "xfs_mount.h" +#include "xfs_defer.h" +#include "xfs_trans.h" +#include "xfs_trans_priv.h" +#include "xfs_attr_item.h" +#include "xfs_alloc.h" +#include "xfs_bmap.h" +#include "xfs_trace.h" +#include "libxfs/xfs_da_format.h" +#include "xfs_da_btree.h" +#include "xfs_attr.h" +#include "xfs_inode.h" +#include "xfs_icache.h" +#include "xfs_quota.h" + +/* + * This routine is called to allocate an "extent free done" + * log item that will hold nextents worth of extents. The + * caller must use all nextents extents, because we are not + * flexible about this at all. + */ +struct xfs_attrd_log_item * +xfs_trans_get_attrd(struct xfs_trans *tp, + struct xfs_attri_log_item *attrip) +{ + struct xfs_attrd_log_item *attrdp; + + ASSERT(tp != NULL); + + attrdp = xfs_attrd_init(tp->t_mountp, attrip); + ASSERT(attrdp != NULL); + + /* + * Get a log_item_desc to point at the new item. + */ + xfs_trans_add_item(tp, &attrdp->item); + return attrdp; +} + +/* + * Delete an attr and log it to the ATTRD. Note that the transaction is marked + * dirty regardless of whether the attr delete succeeds or fails to support the + * ATTRI/ATTRD lifecycle rules. + */ +int +xfs_trans_attr( + struct xfs_trans *tp, + struct xfs_attrd_log_item *attrdp, + struct xfs_inode *ip, + uint32_t op_flags, + uint32_t flags, + uint32_t name_len, + uint32_t value_len, + char *name, + char *value) +{ + uint next_attr; + struct xfs_attr_log_format *attrp; + int error; + int local; + struct xfs_da_args args; + struct xfs_defer_ops dfops; + xfs_fsblock_t firstblock = NULLFSBLOCK; + + tp->t_flags |= XFS_TRANS_RESERVE; + + error = xfs_attr_args_init(&args, ip, name, flags); + if (error) + return error; + + xfs_ilock(ip, XFS_ILOCK_EXCL); + xfs_defer_init(&dfops, &firstblock); + + args.name = name; + args.namelen = name_len; + args.hashval = xfs_da_hashname(args.name, args.namelen); + args.value = value; + args.valuelen = value_len; + args.dfops = &dfops; + args.firstblock = &firstblock; + args.op_flags = XFS_DA_OP_OKNOENT; + args.total = xfs_attr_calc_size(&args, &local); + args.trans = tp; + ASSERT(local); + + error = xfs_qm_dqattach_locked(ip, 0); + if (error) + return error; + + switch (op_flags) { + case XFS_ATTR_OP_FLAGS_SET: + args.op_flags |= XFS_DA_OP_ADDNAME; + error = xfs_attr_set_args(&args, flags, false); + break; + case XFS_ATTR_OP_FLAGS_REMOVE: + ASSERT(XFS_IFORK_Q((ip))); + error = xfs_attr_remove_args(&args, flags); + break; + default: + error = -EFSCORRUPTED; + } + + if (error) + xfs_defer_cancel(&dfops); + + xfs_iunlock(ip, XFS_ILOCK_EXCL); + + /* + * Mark the transaction dirty, even on error. This ensures the + * transaction is aborted, which: + * + * 1.) releases the ATTRI and frees the ATTRD + * 2.) shuts down the filesystem + */ + tp->t_flags |= XFS_TRANS_DIRTY; + attrdp->item.li_desc->lid_flags |= XFS_LID_DIRTY; + + next_attr = attrdp->next_attr; + attrp = &(attrdp->format); + attrp->alf_ino = ip->i_ino; + attrp->alf_op_flags = op_flags; + attrp->alf_value_len = value_len; + attrp->alf_name_len = name_len; + attrp->alf_attr_flags = flags; + + attrdp->name = name; + attrdp->value = value; + attrdp->name_len = name_len; + attrdp->value_len = value_len; + attrdp->next_attr++; + + return error; +} + +static int +xfs_attr_diff_items( + void *priv, + struct list_head *a, + struct list_head *b) +{ + return 0; +} + +/* Get an ATTRI. */ +STATIC void * +xfs_attr_create_intent( + struct xfs_trans *tp, + unsigned int count) +{ + struct xfs_attri_log_item *attrip; + + ASSERT(tp != NULL); + ASSERT(count > 0); + + attrip = xfs_attri_init(tp->t_mountp); + ASSERT(attrip != NULL); + + /* + * Get a log_item_desc to point at the new item. + */ + xfs_trans_add_item(tp, &attrip->item); + return attrip; +} + +/* Log an attr to the intent item. */ +STATIC void +xfs_attr_log_item( + struct xfs_trans *tp, + void *intent, + struct list_head *item) +{ + struct xfs_attri_log_item *attrip = intent; + struct xfs_attr_item *free; + struct xfs_attr_log_format *attrp; + + free = container_of(item, struct xfs_attr_item, xattri_list); + + tp->t_flags |= XFS_TRANS_DIRTY; + attrip->item.li_desc->lid_flags |= XFS_LID_DIRTY; + + attrp = &attrip->format; + attrp->alf_ino = free->xattri_ip->i_ino; + attrp->alf_op_flags = free->xattri_op_flags; + attrp->alf_value_len = free->xattri_value_len; + attrp->alf_name_len = free->xattri_name_len; + attrp->alf_attr_flags = free->xattri_flags; + + attrip->name = &(free->xattri_name_value[0]); + attrip->value = &(free->xattri_name_value[free->xattri_name_len]); + attrip->name_len = free->xattri_name_len; + attrip->value_len = free->xattri_value_len; +} + +/* Get an ATTRD so we can process all the attrs. */ +STATIC void * +xfs_attr_create_done( + struct xfs_trans *tp, + void *intent, + unsigned int count) +{ + return xfs_trans_get_attrd(tp, intent); +} + +/* Process an attr. */ +STATIC int +xfs_attr_finish_item( + struct xfs_trans *tp, + struct xfs_defer_ops *dop, + struct list_head *item, + void *done_item, + void **state) +{ + struct xfs_attr_item *free; + int error; + + free = container_of(item, struct xfs_attr_item, xattri_list); + error = xfs_trans_attr(tp, done_item, + free->xattri_ip, + free->xattri_op_flags, + free->xattri_flags, + free->xattri_name_len, + free->xattri_value_len, + &free->xattri_name_value[0], + &free->xattri_name_value[free->xattri_name_len]); + kmem_free(free); + return error; +} + +/* Abort all pending ATTRs. */ +STATIC void +xfs_attr_abort_intent( + void *intent) +{ + xfs_attri_release(intent); +} + +/* Cancel an attr */ +STATIC void +xfs_attr_cancel_item( + struct list_head *item) +{ + struct xfs_attr_item *free; + + free = container_of(item, struct xfs_attr_item, xattri_list); + kmem_free(free); +} + +static const struct xfs_defer_op_type xfs_attr_defer_type = { + .type = XFS_DEFER_OPS_TYPE_ATTR, + .max_items = XFS_ATTRI_MAX_FAST_ATTRS, + .diff_items = xfs_attr_diff_items, + .create_intent = xfs_attr_create_intent, + .abort_intent = xfs_attr_abort_intent, + .log_item = xfs_attr_log_item, + .create_done = xfs_attr_create_done, + .finish_item = xfs_attr_finish_item, + .cancel_item = xfs_attr_cancel_item, +}; + +/* Register the deferred op type. */ +void +xfs_attr_init_defer_op(void) +{ + xfs_defer_init_op_type(&xfs_attr_defer_type); +}