226 lines
6.6 KiB
C
226 lines
6.6 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2000,2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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*/
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#include "xfs.h"
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#include "xfs_fs.h"
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#include "xfs_shared.h"
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#include "xfs_format.h"
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#include "xfs_log_format.h"
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#include "xfs_trans_resv.h"
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#include "xfs_mount.h"
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#include "xfs_inode.h"
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#include "xfs_trans.h"
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#include "xfs_trans_priv.h"
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#include "xfs_inode_item.h"
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#include <linux/iversion.h>
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/*
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* Add a locked inode to the transaction.
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*
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* The inode must be locked, and it cannot be associated with any transaction.
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* If lock_flags is non-zero the inode will be unlocked on transaction commit.
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*/
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void
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xfs_trans_ijoin(
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struct xfs_trans *tp,
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struct xfs_inode *ip,
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uint lock_flags)
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{
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struct xfs_inode_log_item *iip;
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ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
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if (ip->i_itemp == NULL)
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xfs_inode_item_init(ip, ip->i_mount);
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iip = ip->i_itemp;
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ASSERT(iip->ili_lock_flags == 0);
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iip->ili_lock_flags = lock_flags;
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ASSERT(!xfs_iflags_test(ip, XFS_ISTALE));
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/*
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* Get a log_item_desc to point at the new item.
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*/
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xfs_trans_add_item(tp, &iip->ili_item);
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}
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/*
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* Transactional inode timestamp update. Requires the inode to be locked and
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* joined to the transaction supplied. Relies on the transaction subsystem to
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* track dirty state and update/writeback the inode accordingly.
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*/
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void
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xfs_trans_ichgtime(
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struct xfs_trans *tp,
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struct xfs_inode *ip,
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int flags)
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{
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struct inode *inode = VFS_I(ip);
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struct timespec64 tv;
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ASSERT(tp);
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ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
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tv = current_time(inode);
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if (flags & XFS_ICHGTIME_MOD)
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inode->i_mtime = tv;
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if (flags & XFS_ICHGTIME_CHG)
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inode->i_ctime = tv;
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if (flags & XFS_ICHGTIME_CREATE)
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ip->i_crtime = tv;
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}
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/*
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* This is called to mark the fields indicated in fieldmask as needing to be
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* logged when the transaction is committed. The inode must already be
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* associated with the given transaction.
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*
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* The values for fieldmask are defined in xfs_inode_item.h. We always log all
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* of the core inode if any of it has changed, and we always log all of the
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* inline data/extents/b-tree root if any of them has changed.
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*
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* Grab and pin the cluster buffer associated with this inode to avoid RMW
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* cycles at inode writeback time. Avoid the need to add error handling to every
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* xfs_trans_log_inode() call by shutting down on read error. This will cause
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* transactions to fail and everything to error out, just like if we return a
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* read error in a dirty transaction and cancel it.
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*/
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void
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xfs_trans_log_inode(
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struct xfs_trans *tp,
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struct xfs_inode *ip,
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uint flags)
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{
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struct xfs_inode_log_item *iip = ip->i_itemp;
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struct inode *inode = VFS_I(ip);
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uint iversion_flags = 0;
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ASSERT(iip);
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ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
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ASSERT(!xfs_iflags_test(ip, XFS_ISTALE));
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tp->t_flags |= XFS_TRANS_DIRTY;
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/*
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* Don't bother with i_lock for the I_DIRTY_TIME check here, as races
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* don't matter - we either will need an extra transaction in 24 hours
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* to log the timestamps, or will clear already cleared fields in the
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* worst case.
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*/
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if (inode->i_state & I_DIRTY_TIME) {
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spin_lock(&inode->i_lock);
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inode->i_state &= ~I_DIRTY_TIME;
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spin_unlock(&inode->i_lock);
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}
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/*
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* First time we log the inode in a transaction, bump the inode change
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* counter if it is configured for this to occur. While we have the
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* inode locked exclusively for metadata modification, we can usually
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* avoid setting XFS_ILOG_CORE if no one has queried the value since
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* the last time it was incremented. If we have XFS_ILOG_CORE already
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* set however, then go ahead and bump the i_version counter
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* unconditionally.
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*/
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if (!test_and_set_bit(XFS_LI_DIRTY, &iip->ili_item.li_flags)) {
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if (IS_I_VERSION(inode) &&
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inode_maybe_inc_iversion(inode, flags & XFS_ILOG_CORE))
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iversion_flags = XFS_ILOG_CORE;
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}
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/*
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* If we're updating the inode core or the timestamps and it's possible
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* to upgrade this inode to bigtime format, do so now.
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*/
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if ((flags & (XFS_ILOG_CORE | XFS_ILOG_TIMESTAMP)) &&
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xfs_has_bigtime(ip->i_mount) &&
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!xfs_inode_has_bigtime(ip)) {
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ip->i_diflags2 |= XFS_DIFLAG2_BIGTIME;
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flags |= XFS_ILOG_CORE;
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}
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/*
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* Inode verifiers do not check that the extent size hint is an integer
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* multiple of the rt extent size on a directory with both rtinherit
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* and extszinherit flags set. If we're logging a directory that is
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* misconfigured in this way, clear the hint.
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*/
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if ((ip->i_diflags & XFS_DIFLAG_RTINHERIT) &&
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(ip->i_diflags & XFS_DIFLAG_EXTSZINHERIT) &&
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(ip->i_extsize % ip->i_mount->m_sb.sb_rextsize) > 0) {
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ip->i_diflags &= ~(XFS_DIFLAG_EXTSIZE |
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XFS_DIFLAG_EXTSZINHERIT);
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ip->i_extsize = 0;
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flags |= XFS_ILOG_CORE;
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}
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/*
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* Record the specific change for fdatasync optimisation. This allows
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* fdatasync to skip log forces for inodes that are only timestamp
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* dirty.
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*/
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spin_lock(&iip->ili_lock);
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iip->ili_fsync_fields |= flags;
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if (!iip->ili_item.li_buf) {
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struct xfs_buf *bp;
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int error;
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/*
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* We hold the ILOCK here, so this inode is not going to be
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* flushed while we are here. Further, because there is no
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* buffer attached to the item, we know that there is no IO in
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* progress, so nothing will clear the ili_fields while we read
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* in the buffer. Hence we can safely drop the spin lock and
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* read the buffer knowing that the state will not change from
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* here.
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*/
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spin_unlock(&iip->ili_lock);
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error = xfs_imap_to_bp(ip->i_mount, tp, &ip->i_imap, &bp);
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if (error) {
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xfs_force_shutdown(ip->i_mount, SHUTDOWN_META_IO_ERROR);
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return;
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}
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/*
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* We need an explicit buffer reference for the log item but
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* don't want the buffer to remain attached to the transaction.
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* Hold the buffer but release the transaction reference once
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* we've attached the inode log item to the buffer log item
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* list.
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*/
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xfs_buf_hold(bp);
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spin_lock(&iip->ili_lock);
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iip->ili_item.li_buf = bp;
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bp->b_flags |= _XBF_INODES;
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list_add_tail(&iip->ili_item.li_bio_list, &bp->b_li_list);
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xfs_trans_brelse(tp, bp);
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}
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/*
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* Always OR in the bits from the ili_last_fields field. This is to
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* coordinate with the xfs_iflush() and xfs_buf_inode_iodone() routines
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* in the eventual clearing of the ili_fields bits. See the big comment
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* in xfs_iflush() for an explanation of this coordination mechanism.
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*/
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iip->ili_fields |= (flags | iip->ili_last_fields | iversion_flags);
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spin_unlock(&iip->ili_lock);
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}
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int
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xfs_trans_roll_inode(
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struct xfs_trans **tpp,
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struct xfs_inode *ip)
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{
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int error;
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xfs_trans_log_inode(*tpp, ip, XFS_ILOG_CORE);
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error = xfs_trans_roll(tpp);
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if (!error)
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xfs_trans_ijoin(*tpp, ip, 0);
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return error;
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}
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