#include "xfs.h"
#include "xfs_fs.h"
#include "xfs_types.h"
-#include "xfs_bit.h"
#include "xfs_log.h"
-#include "xfs_inum.h"
#include "xfs_trans.h"
#include "xfs_sb.h"
#include "xfs_ag.h"
wake_up_bit(&ip->i_flags, __XFS_IPINNED_BIT);
}
-/*
- * This is called to attempt to lock the inode associated with this
- * inode log item, in preparation for the push routine which does the actual
- * iflush. Don't sleep on the inode lock or the flush lock.
- *
- * If the flush lock is already held, indicating that the inode has
- * been or is in the process of being flushed, then (ideally) we'd like to
- * see if the inode's buffer is still incore, and if so give it a nudge.
- * We delay doing so until the pushbuf routine, though, to avoid holding
- * the AIL lock across a call to the blackhole which is the buffer cache.
- * Also we don't want to sleep in any device strategy routines, which can happen
- * if we do the subsequent bawrite in here.
- */
STATIC uint
-xfs_inode_item_trylock(
- struct xfs_log_item *lip)
+xfs_inode_item_push(
+ struct xfs_log_item *lip,
+ struct list_head *buffer_list)
{
struct xfs_inode_log_item *iip = INODE_ITEM(lip);
struct xfs_inode *ip = iip->ili_inode;
+ struct xfs_buf *bp = NULL;
+ uint rval = XFS_ITEM_SUCCESS;
+ int error;
if (xfs_ipincount(ip) > 0)
return XFS_ITEM_PINNED;
if (!xfs_ilock_nowait(ip, XFS_ILOCK_SHARED))
return XFS_ITEM_LOCKED;
+ /*
+ * Re-check the pincount now that we stabilized the value by
+ * taking the ilock.
+ */
+ if (xfs_ipincount(ip) > 0) {
+ rval = XFS_ITEM_PINNED;
+ goto out_unlock;
+ }
+
+ /*
+ * Someone else is already flushing the inode. Nothing we can do
+ * here but wait for the flush to finish and remove the item from
+ * the AIL.
+ */
if (!xfs_iflock_nowait(ip)) {
- /*
- * inode has already been flushed to the backing buffer,
- * leave it locked in shared mode, pushbuf routine will
- * unlock it.
- */
- return XFS_ITEM_PUSHBUF;
+ rval = XFS_ITEM_FLUSHING;
+ goto out_unlock;
}
- /* Stale items should force out the iclog */
+ /*
+ * Stale inode items should force out the iclog.
+ */
if (ip->i_flags & XFS_ISTALE) {
xfs_ifunlock(ip);
xfs_iunlock(ip, XFS_ILOCK_SHARED);
return XFS_ITEM_PINNED;
}
-#ifdef DEBUG
- if (!XFS_FORCED_SHUTDOWN(ip->i_mount)) {
- ASSERT(iip->ili_fields != 0);
- ASSERT(iip->ili_logged == 0);
- ASSERT(lip->li_flags & XFS_LI_IN_AIL);
+ ASSERT(iip->ili_fields != 0 || XFS_FORCED_SHUTDOWN(ip->i_mount));
+ ASSERT(iip->ili_logged == 0 || XFS_FORCED_SHUTDOWN(ip->i_mount));
+
+ spin_unlock(&lip->li_ailp->xa_lock);
+
+ error = xfs_iflush(ip, &bp);
+ if (!error) {
+ if (!xfs_buf_delwri_queue(bp, buffer_list))
+ rval = XFS_ITEM_FLUSHING;
+ xfs_buf_relse(bp);
}
-#endif
- return XFS_ITEM_SUCCESS;
+
+ spin_lock(&lip->li_ailp->xa_lock);
+out_unlock:
+ xfs_iunlock(ip, XFS_ILOCK_SHARED);
+ return rval;
}
/*
return lsn;
}
-/*
- * This gets called by xfs_trans_push_ail(), when IOP_TRYLOCK
- * failed to get the inode flush lock but did get the inode locked SHARED.
- * Here we're trying to see if the inode buffer is incore, and if so whether it's
- * marked delayed write. If that's the case, we'll promote it and that will
- * allow the caller to write the buffer by triggering the xfsbufd to run.
- */
-STATIC bool
-xfs_inode_item_pushbuf(
- struct xfs_log_item *lip)
-{
- struct xfs_inode_log_item *iip = INODE_ITEM(lip);
- struct xfs_inode *ip = iip->ili_inode;
- struct xfs_buf *bp;
- bool ret = true;
-
- ASSERT(xfs_isilocked(ip, XFS_ILOCK_SHARED));
-
- /*
- * If a flush is not in progress anymore, chances are that the
- * inode was taken off the AIL. So, just get out.
- */
- if (!xfs_isiflocked(ip) ||
- !(lip->li_flags & XFS_LI_IN_AIL)) {
- xfs_iunlock(ip, XFS_ILOCK_SHARED);
- return true;
- }
-
- bp = xfs_incore(ip->i_mount->m_ddev_targp, iip->ili_format.ilf_blkno,
- iip->ili_format.ilf_len, XBF_TRYLOCK);
-
- xfs_iunlock(ip, XFS_ILOCK_SHARED);
- if (!bp)
- return true;
- if (XFS_BUF_ISDELAYWRITE(bp))
- xfs_buf_delwri_promote(bp);
- if (xfs_buf_ispinned(bp))
- ret = false;
- xfs_buf_relse(bp);
- return ret;
-}
-
-/*
- * This is called to asynchronously write the inode associated with this
- * inode log item out to disk. The inode will already have been locked by
- * a successful call to xfs_inode_item_trylock().
- */
-STATIC void
-xfs_inode_item_push(
- struct xfs_log_item *lip)
-{
- struct xfs_inode_log_item *iip = INODE_ITEM(lip);
- struct xfs_inode *ip = iip->ili_inode;
-
- ASSERT(xfs_isilocked(ip, XFS_ILOCK_SHARED));
- ASSERT(xfs_isiflocked(ip));
-
- /*
- * Since we were able to lock the inode's flush lock and
- * we found it on the AIL, the inode must be dirty. This
- * is because the inode is removed from the AIL while still
- * holding the flush lock in xfs_iflush_done(). Thus, if
- * we found it in the AIL and were able to obtain the flush
- * lock without sleeping, then there must not have been
- * anyone in the process of flushing the inode.
- */
- ASSERT(XFS_FORCED_SHUTDOWN(ip->i_mount) || iip->ili_fields != 0);
-
- /*
- * Push the inode to it's backing buffer. This will not remove the
- * inode from the AIL - a further push will be required to trigger a
- * buffer push. However, this allows all the dirty inodes to be pushed
- * to the buffer before it is pushed to disk. The buffer IO completion
- * will pull the inode from the AIL, mark it clean and unlock the flush
- * lock.
- */
- (void) xfs_iflush(ip, SYNC_TRYLOCK);
- xfs_iunlock(ip, XFS_ILOCK_SHARED);
-}
-
/*
* XXX rcc - this one really has to do something. Probably needs
* to stamp in a new field in the incore inode.
.iop_format = xfs_inode_item_format,
.iop_pin = xfs_inode_item_pin,
.iop_unpin = xfs_inode_item_unpin,
- .iop_trylock = xfs_inode_item_trylock,
.iop_unlock = xfs_inode_item_unlock,
.iop_committed = xfs_inode_item_committed,
.iop_push = xfs_inode_item_push,
- .iop_pushbuf = xfs_inode_item_pushbuf,
.iop_committing = xfs_inode_item_committing
};
ASSERT(i <= need_ail);
}
/* xfs_trans_ail_delete_bulk() drops the AIL lock. */
- xfs_trans_ail_delete_bulk(ailp, log_items, i);
+ xfs_trans_ail_delete_bulk(ailp, log_items, i,
+ SHUTDOWN_CORRUPT_INCORE);
}
}
/*
- * This is the inode flushing abort routine. It is called
- * from xfs_iflush when the filesystem is shutting down to clean
- * up the inode state.
- * It is responsible for removing the inode item
- * from the AIL if it has not been re-logged, and unlocking the inode's
- * flush lock.
+ * This is the inode flushing abort routine. It is called from xfs_iflush when
+ * the filesystem is shutting down to clean up the inode state. It is
+ * responsible for removing the inode item from the AIL if it has not been
+ * re-logged, and unlocking the inode's flush lock.
*/
void
xfs_iflush_abort(
- xfs_inode_t *ip)
+ xfs_inode_t *ip,
+ bool stale)
{
xfs_inode_log_item_t *iip = ip->i_itemp;
spin_lock(&ailp->xa_lock);
if (iip->ili_item.li_flags & XFS_LI_IN_AIL) {
/* xfs_trans_ail_delete() drops the AIL lock. */
- xfs_trans_ail_delete(ailp, (xfs_log_item_t *)iip);
+ xfs_trans_ail_delete(ailp, &iip->ili_item,
+ stale ?
+ SHUTDOWN_LOG_IO_ERROR :
+ SHUTDOWN_CORRUPT_INCORE);
} else
spin_unlock(&ailp->xa_lock);
}
struct xfs_buf *bp,
struct xfs_log_item *lip)
{
- xfs_iflush_abort(INODE_ITEM(lip)->ili_inode);
+ xfs_iflush_abort(INODE_ITEM(lip)->ili_inode, true);
}
/*
git.openpandora.org / pandora-kernel.git / blobdiff