// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2000,2005 Silicon Graphics, Inc.
 * All Rights Reserved.
 */
#include "xfs_platform.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_mount.h"
#include "xfs_inode.h"
#include "xfs_trans.h"
#include "xfs_trans_priv.h"
#include "xfs_inode_item.h"

#include <linux/iversion.h>

/*
 * Add a locked inode to the transaction.
 *
 * The inode must be locked, and it cannot be associated with any transaction.
 * If lock_flags is non-zero the inode will be unlocked on transaction commit.
 */
void
xfs_trans_ijoin(
        struct xfs_trans        *tp,
        struct xfs_inode        *ip,
        uint                    lock_flags)
{
        struct xfs_inode_log_item *iip;

        xfs_assert_ilocked(ip, XFS_ILOCK_EXCL);
        if (ip->i_itemp == NULL)
                xfs_inode_item_init(ip, ip->i_mount);
        iip = ip->i_itemp;

        ASSERT(iip->ili_lock_flags == 0);
        iip->ili_lock_flags = lock_flags;
        ASSERT(!xfs_iflags_test(ip, XFS_ISTALE));

        /* Reset the per-tx dirty context and add the item to the tx. */
        iip->ili_dirty_flags = 0;
        xfs_trans_add_item(tp, &iip->ili_item);
}

/*
 * Transactional inode timestamp update. Requires the inode to be locked and
 * joined to the transaction supplied. Relies on the transaction subsystem to
 * track dirty state and update/writeback the inode accordingly.
 */
void
xfs_trans_ichgtime(
        struct xfs_trans        *tp,
        struct xfs_inode        *ip,
        int                     flags)
{
        struct inode            *inode = VFS_I(ip);
        struct timespec64       tv;

        ASSERT(tp);
        xfs_assert_ilocked(ip, XFS_ILOCK_EXCL);

        /* If the mtime changes, then ctime must also change */
        ASSERT(flags & XFS_ICHGTIME_CHG);

        tv = inode_set_ctime_current(inode);
        if (flags & XFS_ICHGTIME_MOD)
                inode_set_mtime_to_ts(inode, tv);
        if (flags & XFS_ICHGTIME_ACCESS)
                inode_set_atime_to_ts(inode, tv);
        if (flags & XFS_ICHGTIME_CREATE)
                ip->i_crtime = tv;
}

/*
 * This is called to mark the fields indicated in fieldmask as needing to be
 * logged when the transaction is committed.  The inode must already be
 * associated with the given transaction. All we do here is record where the
 * inode was dirtied and mark the transaction and inode log item dirty;
 * everything else is done in the ->precommit log item operation after the
 * changes in the transaction have been completed.
 */
void
xfs_trans_log_inode(
        struct xfs_trans        *tp,
        struct xfs_inode        *ip,
        uint                    flags)
{
        struct xfs_inode_log_item *iip = ip->i_itemp;
        struct inode            *inode = VFS_I(ip);

        ASSERT(iip);
        xfs_assert_ilocked(ip, XFS_ILOCK_EXCL);
        ASSERT(!xfs_iflags_test(ip, XFS_ISTALE));

        tp->t_flags |= XFS_TRANS_DIRTY;

        /*
         * First time we log the inode in a transaction, bump the inode change
         * counter if it is configured for this to occur. While we have the
         * inode locked exclusively for metadata modification, we can usually
         * avoid setting XFS_ILOG_CORE if no one has queried the value since
         * the last time it was incremented. If we have XFS_ILOG_CORE already
         * set however, then go ahead and bump the i_version counter
         * unconditionally.
         */
        if (!test_and_set_bit(XFS_LI_DIRTY, &iip->ili_item.li_flags)) {
                if (IS_I_VERSION(inode) &&
                    inode_maybe_inc_iversion(inode, flags & XFS_ILOG_CORE))
                        flags |= XFS_ILOG_IVERSION;
        }

        iip->ili_dirty_flags |= flags;
}

int
xfs_trans_roll_inode(
        struct xfs_trans        **tpp,
        struct xfs_inode        *ip)
{
        int                     error;

        xfs_trans_log_inode(*tpp, ip, XFS_ILOG_CORE);
        error = xfs_trans_roll(tpp);
        if (!error)
                xfs_trans_ijoin(*tpp, ip, 0);
        return error;
}