[XFS] split out two helpers from xfs_syncsub
Split out two helpers from xfs_syncsub for the dummy log commit and the superblock writeout. SGI-PV: 988140 SGI-Modid: xfs-linux-melb:xfs-kern:32303a Signed-off-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: David Chinner <david@fromorbit.com> Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
This commit is contained in:
Christoph Hellwig
Lachlan McIlroy
Родитель
4e8938feba
Коммит
2af75df7be
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@ -315,6 +315,93 @@ xfs_sync_inodes(
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return XFS_ERROR(last_error);
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}
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STATIC int
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xfs_commit_dummy_trans(
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struct xfs_mount *mp,
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uint log_flags)
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{
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struct xfs_inode *ip = mp->m_rootip;
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struct xfs_trans *tp;
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int error;
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/*
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* Put a dummy transaction in the log to tell recovery
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* that all others are OK.
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*/
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tp = xfs_trans_alloc(mp, XFS_TRANS_DUMMY1);
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error = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0);
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if (error) {
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xfs_trans_cancel(tp, 0);
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return error;
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}
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xfs_ilock(ip, XFS_ILOCK_EXCL);
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xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
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xfs_trans_ihold(tp, ip);
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xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
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/* XXX(hch): ignoring the error here.. */
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error = xfs_trans_commit(tp, 0);
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xfs_iunlock(ip, XFS_ILOCK_EXCL);
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xfs_log_force(mp, 0, log_flags);
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return 0;
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}
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STATIC int
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xfs_sync_fsdata(
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struct xfs_mount *mp,
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int flags)
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{
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struct xfs_buf *bp;
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struct xfs_buf_log_item *bip;
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int error = 0;
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/*
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* If this is xfssyncd() then only sync the superblock if we can
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* lock it without sleeping and it is not pinned.
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*/
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if (flags & SYNC_BDFLUSH) {
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ASSERT(!(flags & SYNC_WAIT));
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bp = xfs_getsb(mp, XFS_BUF_TRYLOCK);
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if (!bp)
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goto out;
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bip = XFS_BUF_FSPRIVATE(bp, struct xfs_buf_log_item *);
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if (!bip || !xfs_buf_item_dirty(bip) || XFS_BUF_ISPINNED(bp))
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goto out_brelse;
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} else {
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bp = xfs_getsb(mp, 0);
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/*
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* If the buffer is pinned then push on the log so we won't
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* get stuck waiting in the write for someone, maybe
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* ourselves, to flush the log.
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*
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* Even though we just pushed the log above, we did not have
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* the superblock buffer locked at that point so it can
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* become pinned in between there and here.
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*/
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if (XFS_BUF_ISPINNED(bp))
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xfs_log_force(mp, 0, XFS_LOG_FORCE);
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}
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if (flags & SYNC_WAIT)
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XFS_BUF_UNASYNC(bp);
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else
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XFS_BUF_ASYNC(bp);
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return xfs_bwrite(mp, bp);
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out_brelse:
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xfs_buf_relse(bp);
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out:
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return error;
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}
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/*
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* xfs sync routine for internal use
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*
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@ -331,8 +418,6 @@ xfs_syncsub(
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int error = 0;
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int last_error = 0;
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uint log_flags = XFS_LOG_FORCE;
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xfs_buf_t *bp;
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xfs_buf_log_item_t *bip;
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/*
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* Sync out the log. This ensures that the log is periodically
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@ -355,83 +440,22 @@ xfs_syncsub(
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* log activity, so if this isn't vfs_sync() then flush
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* the log again.
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*/
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if (flags & SYNC_DELWRI) {
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xfs_log_force(mp, (xfs_lsn_t)0, log_flags);
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}
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if (flags & SYNC_DELWRI)
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xfs_log_force(mp, 0, log_flags);
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if (flags & SYNC_FSDATA) {
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/*
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* If this is vfs_sync() then only sync the superblock
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* if we can lock it without sleeping and it is not pinned.
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*/
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if (flags & SYNC_BDFLUSH) {
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bp = xfs_getsb(mp, XFS_BUF_TRYLOCK);
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if (bp != NULL) {
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bip = XFS_BUF_FSPRIVATE(bp,xfs_buf_log_item_t*);
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if ((bip != NULL) &&
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xfs_buf_item_dirty(bip)) {
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if (!(XFS_BUF_ISPINNED(bp))) {
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XFS_BUF_ASYNC(bp);
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error = xfs_bwrite(mp, bp);
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} else {
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xfs_buf_relse(bp);
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}
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} else {
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xfs_buf_relse(bp);
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}
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}
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} else {
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bp = xfs_getsb(mp, 0);
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/*
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* If the buffer is pinned then push on the log so
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* we won't get stuck waiting in the write for
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* someone, maybe ourselves, to flush the log.
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* Even though we just pushed the log above, we
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* did not have the superblock buffer locked at
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* that point so it can become pinned in between
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* there and here.
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*/
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if (XFS_BUF_ISPINNED(bp))
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xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE);
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if (flags & SYNC_WAIT)
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XFS_BUF_UNASYNC(bp);
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else
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XFS_BUF_ASYNC(bp);
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error = xfs_bwrite(mp, bp);
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}
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if (error) {
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error = xfs_sync_fsdata(mp, flags);
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if (error)
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last_error = error;
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}
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}
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/*
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* Now check to see if the log needs a "dummy" transaction.
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*/
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if (!(flags & SYNC_REMOUNT) && xfs_log_need_covered(mp)) {
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xfs_trans_t *tp;
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xfs_inode_t *ip;
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/*
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* Put a dummy transaction in the log to tell
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* recovery that all others are OK.
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*/
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tp = xfs_trans_alloc(mp, XFS_TRANS_DUMMY1);
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if ((error = xfs_trans_reserve(tp, 0,
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XFS_ICHANGE_LOG_RES(mp),
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0, 0, 0))) {
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xfs_trans_cancel(tp, 0);
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error = xfs_commit_dummy_trans(mp, log_flags);
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if (error)
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return error;
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}
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ip = mp->m_rootip;
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xfs_ilock(ip, XFS_ILOCK_EXCL);
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xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
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xfs_trans_ihold(tp, ip);
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xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
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error = xfs_trans_commit(tp, 0);
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xfs_iunlock(ip, XFS_ILOCK_EXCL);
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xfs_log_force(mp, (xfs_lsn_t)0, log_flags);
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}
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/*
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