* we can write the unmount record.
*/
do {
- xfs_syncsub(mp, SYNC_REMOUNT|SYNC_ATTR|SYNC_WAIT, 0, NULL);
+ xfs_syncsub(mp, SYNC_REMOUNT|SYNC_ATTR|SYNC_WAIT, NULL);
pincount = xfs_flush_buftarg(mp->m_ddev_targp, 1);
if (!pincount) {
delay(50);
bhv_vnode_t *rvp = XFS_ITOV(rip);
int error;
- xfs_ilock(rip, XFS_ILOCK_EXCL);
+ xfs_ilock(rip, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT);
xfs_iflock(rip);
/*
statp->f_type = XFS_SB_MAGIC;
- xfs_icsb_sync_counters_lazy(mp);
+ xfs_icsb_sync_counters_flags(mp, XFS_ICSB_LAZY_COUNT);
s = XFS_SB_LOCK(mp);
statp->f_bsize = sbp->sb_blocksize;
lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0;
* this by simply making sure the log gets flushed
* if SYNC_BDFLUSH is set, and by actually writing it
* out otherwise.
+ * SYNC_IOWAIT - The caller wants us to wait for all data I/O to complete
+ * before we return (including direct I/O). Forms the drain
+ * side of the write barrier needed to safely quiesce the
+ * filesystem.
*
*/
/*ARGSUSED*/
{
xfs_mount_t *mp = XFS_BHVTOM(bdp);
- if (unlikely(flags == SYNC_QUIESCE))
- return xfs_quiesce_fs(mp);
- else
- return xfs_syncsub(mp, flags, 0, NULL);
+ return xfs_syncsub(mp, flags, NULL);
}
/*
* xfs sync routine for internal use
*
* This routine supports all of the flags defined for the generic vfs_sync
- * interface as explained above under xfs_sync. In the interests of not
- * changing interfaces within the 6.5 family, additional internally-
- * required functions are specified within a separate xflags parameter,
- * only available by calling this routine.
+ * interface as explained above under xfs_sync.
*
*/
int
xfs_sync_inodes(
xfs_mount_t *mp,
int flags,
- int xflags,
int *bypassed)
{
xfs_inode_t *ip = NULL;
* in the inode list.
*/
- if ((flags & SYNC_CLOSE) && (vp != NULL)) {
- /*
- * This is the shutdown case. We just need to
- * flush and invalidate all the pages associated
- * with the inode. Drop the inode lock since
- * we can't hold it across calls to the buffer
- * cache.
- *
- * We don't set the VREMAPPING bit in the vnode
- * here, because we don't hold the vnode lock
- * exclusively. It doesn't really matter, though,
- * because we only come here when we're shutting
- * down anyway.
- */
- xfs_iunlock(ip, XFS_ILOCK_SHARED);
-
- if (XFS_FORCED_SHUTDOWN(mp)) {
- bhv_vop_toss_pages(vp, 0, -1, FI_REMAPF);
- } else {
- bhv_vop_flushinval_pages(vp, 0, -1, FI_REMAPF);
+ /*
+ * If we have to flush data or wait for I/O completion
+ * we need to drop the ilock that we currently hold.
+ * If we need to drop the lock, insert a marker if we
+ * have not already done so.
+ */
+ if ((flags & (SYNC_CLOSE|SYNC_IOWAIT)) ||
+ ((flags & SYNC_DELWRI) && VN_DIRTY(vp))) {
+ if (mount_locked) {
+ IPOINTER_INSERT(ip, mp);
}
+ xfs_iunlock(ip, XFS_ILOCK_SHARED);
- xfs_ilock(ip, XFS_ILOCK_SHARED);
-
- } else if ((flags & SYNC_DELWRI) && (vp != NULL)) {
- if (VN_DIRTY(vp)) {
- /* We need to have dropped the lock here,
- * so insert a marker if we have not already
- * done so.
- */
- if (mount_locked) {
- IPOINTER_INSERT(ip, mp);
- }
-
- /*
- * Drop the inode lock since we can't hold it
- * across calls to the buffer cache.
- */
- xfs_iunlock(ip, XFS_ILOCK_SHARED);
+ if (flags & SYNC_CLOSE) {
+ /* Shutdown case. Flush and invalidate. */
+ if (XFS_FORCED_SHUTDOWN(mp))
+ bhv_vop_toss_pages(vp, 0, -1, FI_REMAPF);
+ else
+ error = bhv_vop_flushinval_pages(vp, 0,
+ -1, FI_REMAPF);
+ } else if ((flags & SYNC_DELWRI) && VN_DIRTY(vp)) {
error = bhv_vop_flush_pages(vp, (xfs_off_t)0,
-1, fflag, FI_NONE);
- xfs_ilock(ip, XFS_ILOCK_SHARED);
}
+ /*
+ * When freezing, we need to wait ensure all I/O (including direct
+ * I/O) is complete to ensure no further data modification can take
+ * place after this point
+ */
+ if (flags & SYNC_IOWAIT)
+ vn_iowait(vp);
+
+ xfs_ilock(ip, XFS_ILOCK_SHARED);
}
if (flags & SYNC_BDFLUSH) {
* xfs sync routine for internal use
*
* This routine supports all of the flags defined for the generic vfs_sync
- * interface as explained above under xfs_sync. In the interests of not
- * changing interfaces within the 6.5 family, additional internally-
- * required functions are specified within a separate xflags parameter,
- * only available by calling this routine.
+ * interface as explained above under xfs_sync.
*
*/
int
xfs_syncsub(
xfs_mount_t *mp,
int flags,
- int xflags,
int *bypassed)
{
int error = 0;
if (flags & SYNC_BDFLUSH)
xfs_finish_reclaim_all(mp, 1);
else
- error = xfs_sync_inodes(mp, flags, xflags, bypassed);
+ error = xfs_sync_inodes(mp, flags, bypassed);
}
/*
xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
xfs_trans_ihold(tp, ip);
xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
- error = xfs_trans_commit(tp, 0, NULL);
+ error = xfs_trans_commit(tp, 0);
xfs_iunlock(ip, XFS_ILOCK_EXCL);
xfs_log_force(mp, (xfs_lsn_t)0, log_flags);
}
return 0;
}
+/*
+ * Second stage of a freeze. The data is already frozen, now we have to take
+ * care of the metadata. New transactions are already blocked, so we need to
+ * wait for any remaining transactions to drain out before proceding.
+ */
STATIC void
xfs_freeze(
bhv_desc_t *bdp)
{
xfs_mount_t *mp = XFS_BHVTOM(bdp);
+ /* wait for all modifications to complete */
while (atomic_read(&mp->m_active_trans) > 0)
delay(100);
+ /* flush inodes and push all remaining buffers out to disk */
+ xfs_quiesce_fs(mp);
+
+ ASSERT_ALWAYS(atomic_read(&mp->m_active_trans) == 0);
+
/* Push the superblock and write an unmount record */
xfs_log_unmount_write(mp);
xfs_unmountfs_writesb(mp);
projects / mirror_ubuntu-bionic-kernel.git / blobdiff