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authorDave Chinner <dchinner@redhat.com>2010-12-20 03:57:24 +0300
committerDave Chinner <david@fromorbit.com>2010-12-20 03:57:24 +0300
commit9c5f8414efd5eeed9f498d4170337a3eb126341f (patch)
tree5801d0cbd2f37cc72e0b541231c60e281c27d874
parent821eb21d97a8b686649c08b7284d0b9f34d0e138 (diff)
downloadlinux-9c5f8414efd5eeed9f498d4170337a3eb126341f.tar.xz
xfs: fix EFI transaction cancellation.
XFS_EFI_CANCELED has not been set in the code base since xfs_efi_cancel() was removed back in 2006 by commit 065d312e15902976d256ddaf396a7950ec0350a8 ("[XFS] Remove unused iop_abort log item operation), and even then xfs_efi_cancel() was never called. I haven't tracked it back further than that (beyond git history), but it indicates that the handling of EFIs in cancelled transactions has been broken for a long time. Basically, when we get an IOP_UNPIN(lip, 1); call from xfs_trans_uncommit() (i.e. remove == 1), if we don't free the log item descriptor we leak it. Fix the behviour to be correct and kill the XFS_EFI_CANCELED flag. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
-rw-r--r--fs/xfs/xfs_extfree_item.c20
-rw-r--r--fs/xfs/xfs_extfree_item.h1
2 files changed, 9 insertions, 12 deletions
diff --git a/fs/xfs/xfs_extfree_item.c b/fs/xfs/xfs_extfree_item.c
index a55e687bf562..5997efae05dc 100644
--- a/fs/xfs/xfs_extfree_item.c
+++ b/fs/xfs/xfs_extfree_item.c
@@ -99,10 +99,11 @@ xfs_efi_item_pin(
}
/*
- * While EFIs cannot really be pinned, the unpin operation is the
- * last place at which the EFI is manipulated during a transaction.
- * Here we coordinate with xfs_efi_cancel() to determine who gets to
- * free the EFI.
+ * While EFIs cannot really be pinned, the unpin operation is the last place at
+ * which the EFI is manipulated during a transaction. If we are being asked to
+ * remove the EFI it's because the transaction has been cancelled and by
+ * definition that means the EFI cannot be in the AIL so remove it from the
+ * transaction and free it.
*/
STATIC void
xfs_efi_item_unpin(
@@ -113,17 +114,14 @@ xfs_efi_item_unpin(
struct xfs_ail *ailp = lip->li_ailp;
spin_lock(&ailp->xa_lock);
- if (efip->efi_flags & XFS_EFI_CANCELED) {
- if (remove)
- xfs_trans_del_item(lip);
-
- /* xfs_trans_ail_delete() drops the AIL lock. */
- xfs_trans_ail_delete(ailp, lip);
+ if (remove) {
+ ASSERT(!(lip->li_flags & XFS_LI_IN_AIL));
+ xfs_trans_del_item(lip);
xfs_efi_item_free(efip);
} else {
efip->efi_flags |= XFS_EFI_COMMITTED;
- spin_unlock(&ailp->xa_lock);
}
+ spin_unlock(&ailp->xa_lock);
}
/*
diff --git a/fs/xfs/xfs_extfree_item.h b/fs/xfs/xfs_extfree_item.h
index 0d22c56fdf64..f7834ec8efad 100644
--- a/fs/xfs/xfs_extfree_item.h
+++ b/fs/xfs/xfs_extfree_item.h
@@ -115,7 +115,6 @@ typedef struct xfs_efd_log_format_64 {
*/
#define XFS_EFI_RECOVERED 0x1
#define XFS_EFI_COMMITTED 0x2
-#define XFS_EFI_CANCELED 0x4
/*
* This is the "extent free intention" log item. It is used