[PATCH v2 12/12] xfs: add helper to conditionally remove items from the AIL

Brian Foster
2015-08-07T21:15:34Z

Several areas of code duplicate a pattern where we take the AIL lock,
check whether an item is in the AIL and remove it if so. Create a new
helper for this pattern and use it where appropriate.

Signed-off-by: Brian Foster <bfoster@redhat.com>
---
fs/xfs/xfs_buf_item.c | 7 ++-----
fs/xfs/xfs_dquot.c | 8 ++------
fs/xfs/xfs_extfree_item.c | 13 ++-----------
fs/xfs/xfs_inode_item.c | 10 ++--------
fs/xfs/xfs_trans_priv.h | 14 ++++++++++++++
5 files changed, 22 insertions(+), 30 deletions(-)

diff --git a/fs/xfs/xfs_buf_item.c b/fs/xfs/xfs_buf_item.c
index 092d652..f89abeb 100644
--- a/fs/xfs/xfs_buf_item.c
+++ b/fs/xfs/xfs_buf_item.c
@@ -647,11 +647,8 @@ xfs_buf_item_unlock(
xfs_buf_item_relse(bp);
else if (aborted) {
ASSERT(XFS_FORCED_SHUTDOWN(lip->li_mountp));
- if (lip->li_flags & XFS_LI_IN_AIL) {
- spin_lock(&lip->li_ailp->xa_lock);
- xfs_trans_ail_delete(lip->li_ailp, lip,
- SHUTDOWN_LOG_IO_ERROR);
- }
+ xfs_trans_ail_remove(lip->li_ailp, lip,
+ SHUTDOWN_LOG_IO_ERROR);
xfs_buf_item_relse(bp);
}
}
diff --git a/fs/xfs/xfs_dquot.c b/fs/xfs/xfs_dquot.c
index 4143dc7..03e0ca8 100644
--- a/fs/xfs/xfs_dquot.c
+++ b/fs/xfs/xfs_dquot.c
@@ -954,12 +954,8 @@ xfs_qm_dqflush(
struct xfs_log_item *lip = &dqp->q_logitem.qli_item;
dqp->dq_flags &= ~XFS_DQ_DIRTY;

- spin_lock(&mp->m_ail->xa_lock);
- if (lip->li_flags & XFS_LI_IN_AIL)
- xfs_trans_ail_delete(mp->m_ail, lip,
- SHUTDOWN_CORRUPT_INCORE);
- else
- spin_unlock(&mp->m_ail->xa_lock);
+ xfs_trans_ail_remove(mp->m_ail, lip, SHUTDOWN_CORRUPT_INCORE);
+
error = -EIO;
goto out_unlock;
}
diff --git a/fs/xfs/xfs_extfree_item.c b/fs/xfs/xfs_extfree_item.c
index 2b2acac..e3c872c 100644
--- a/fs/xfs/xfs_extfree_item.c
+++ b/fs/xfs/xfs_extfree_item.c
@@ -288,17 +288,8 @@ xfs_efi_release(struct xfs_efi_log_item *efip)
struct xfs_ail *ailp = efip->efi_item.li_ailp;

if (atomic_dec_and_test(&efip->efi_refcount)) {
- spin_lock(&ailp->xa_lock);
- /*
- * We don't know whether the EFI made it to the AIL. Remove it
- * if so. Note that xfs_trans_ail_delete() drops the AIL lock.
- */
- if (efip->efi_item.li_flags & XFS_LI_IN_AIL)
- xfs_trans_ail_delete(ailp, &efip->efi_item,
- SHUTDOWN_LOG_IO_ERROR);
- else
- spin_unlock(&ailp->xa_lock);
-
+ xfs_trans_ail_remove(ailp, &efip->efi_item,
+ SHUTDOWN_LOG_IO_ERROR);
xfs_efi_item_free(efip);
}
}
diff --git a/fs/xfs/xfs_inode_item.c b/fs/xfs/xfs_inode_item.c
index bf13a5a..d4fac829 100644
--- a/fs/xfs/xfs_inode_item.c
+++ b/fs/xfs/xfs_inode_item.c
@@ -705,15 +705,9 @@ xfs_iflush_abort(
if (iip) {
struct xfs_ail *ailp = iip->ili_item.li_ailp;
if (iip->ili_item.li_flags & XFS_LI_IN_AIL) {
- 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, &iip->ili_item,
- stale ?
- SHUTDOWN_LOG_IO_ERROR :
+ xfs_trans_ail_remove(ailp, &iip->ili_item,
+ stale ? SHUTDOWN_LOG_IO_ERROR :
SHUTDOWN_CORRUPT_INCORE);
- } else
- spin_unlock(&ailp->xa_lock);
}
iip->ili_logged = 0;
/*
diff --git a/fs/xfs/xfs_trans_priv.h b/fs/xfs/xfs_trans_priv.h
index 1b73629..c70c670 100644
--- a/fs/xfs/xfs_trans_priv.h
+++ b/fs/xfs/xfs_trans_priv.h
@@ -119,6 +119,20 @@ xfs_trans_ail_delete(
xfs_trans_ail_delete_bulk(ailp, &lip, 1, shutdown_type);
}

+static inline void
+xfs_trans_ail_remove(
+ struct xfs_ail *ailp,
+ struct xfs_log_item *lip,
+ int shutdown_type)
+{
+ spin_lock(&ailp->xa_lock);
+ /* xfs_trans_ail_delete() drops the AIL lock */
+ if (lip->li_flags & XFS_LI_IN_AIL)
+ xfs_trans_ail_delete(ailp, lip, shutdown_type);
+ else
+ spin_unlock(&ailp->xa_lock);
+}
+
void xfs_ail_push(struct xfs_ail *, xfs_lsn_t);
void xfs_ail_push_all(struct xfs_ail *);
void xfs_ail_push_all_sync(struct xfs_ail *);