On Thu, Jun 16, 2016 at 06:19:47PM -0700, Darrick J. Wong wrote:
> Connect the xfs_defer mechanism with the pieces that we'll need to
> handle deferred extent freeing. We'll wire up the existing code to
> our new deferred mechanism later.
>
> Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
> ---
Could we merge this with the xfs_trans_*efi/efd* bits? We'd need to
preserve some calls for recovery, but it looks like other parts are only
used by the deferred ops infrastructure at this point.
Brian
> fs/xfs/libxfs/xfs_defer.h | 1
> fs/xfs/xfs_defer_item.c | 108 +++++++++++++++++++++++++++++++++++++++++++++
> 2 files changed, 109 insertions(+)
>
>
> diff --git a/fs/xfs/libxfs/xfs_defer.h b/fs/xfs/libxfs/xfs_defer.h
> index 85c7a3a..743fc32 100644
> --- a/fs/xfs/libxfs/xfs_defer.h
> +++ b/fs/xfs/libxfs/xfs_defer.h
> @@ -51,6 +51,7 @@ struct xfs_defer_pending {
> * find all the space it needs.
> */
> enum xfs_defer_ops_type {
> + XFS_DEFER_OPS_TYPE_FREE,
> XFS_DEFER_OPS_TYPE_MAX,
> };
>
> diff --git a/fs/xfs/xfs_defer_item.c b/fs/xfs/xfs_defer_item.c
> index 4c2ba28..127a54e 100644
> --- a/fs/xfs/xfs_defer_item.c
> +++ b/fs/xfs/xfs_defer_item.c
> @@ -29,9 +29,117 @@
> #include "xfs_defer.h"
> #include "xfs_trans.h"
> #include "xfs_trace.h"
> +#include "xfs_bmap.h"
> +#include "xfs_extfree_item.h"
> +
> +/* Extent Freeing */
> +
> +/* Sort bmap items by AG. */
> +static int
> +xfs_bmap_free_diff_items(
> + void *priv,
> + struct list_head *a,
> + struct list_head *b)
> +{
> + struct xfs_mount *mp = priv;
> + struct xfs_bmap_free_item *ra;
> + struct xfs_bmap_free_item *rb;
> +
> + ra = container_of(a, struct xfs_bmap_free_item, xbfi_list);
> + rb = container_of(b, struct xfs_bmap_free_item, xbfi_list);
> + return XFS_FSB_TO_AGNO(mp, ra->xbfi_startblock) -
> + XFS_FSB_TO_AGNO(mp, rb->xbfi_startblock);
> +}
> +
> +/* Get an EFI. */
> +STATIC void *
> +xfs_bmap_free_create_intent(
> + struct xfs_trans *tp,
> + unsigned int count)
> +{
> + return xfs_trans_get_efi(tp, count);
> +}
> +
> +/* Log a free extent to the intent item. */
> +STATIC void
> +xfs_bmap_free_log_item(
> + struct xfs_trans *tp,
> + void *intent,
> + struct list_head *item)
> +{
> + struct xfs_bmap_free_item *free;
> +
> + free = container_of(item, struct xfs_bmap_free_item, xbfi_list);
> + xfs_trans_log_efi_extent(tp, intent, free->xbfi_startblock,
> + free->xbfi_blockcount);
> +}
> +
> +/* Get an EFD so we can process all the free extents. */
> +STATIC void *
> +xfs_bmap_free_create_done(
> + struct xfs_trans *tp,
> + void *intent,
> + unsigned int count)
> +{
> + return xfs_trans_get_efd(tp, intent, count);
> +}
> +
> +/* Process a free extent. */
> +STATIC int
> +xfs_bmap_free_finish_item(
> + struct xfs_trans *tp,
> + struct xfs_defer_ops *dop,
> + struct list_head *item,
> + void *done_item,
> + void **state)
> +{
> + struct xfs_bmap_free_item *free;
> + int error;
> +
> + free = container_of(item, struct xfs_bmap_free_item, xbfi_list);
> + error = xfs_trans_free_extent(tp, done_item,
> + free->xbfi_startblock,
> + free->xbfi_blockcount);
> + kmem_free(free);
> + return error;
> +}
> +
> +/* Abort all pending EFIs. */
> +STATIC void
> +xfs_bmap_free_abort_intent(
> + void *intent)
> +{
> + xfs_efi_release(intent);
> +}
> +
> +/* Cancel a free extent. */
> +STATIC void
> +xfs_bmap_free_cancel_item(
> + struct list_head *item)
> +{
> + struct xfs_bmap_free_item *free;
> +
> + free = container_of(item, struct xfs_bmap_free_item, xbfi_list);
> + kmem_free(free);
> +}
> +
> +const struct xfs_defer_op_type xfs_extent_free_defer_type = {
> + .type = XFS_DEFER_OPS_TYPE_FREE,
> + .max_items = XFS_EFI_MAX_FAST_EXTENTS,
> + .diff_items = xfs_bmap_free_diff_items,
> + .create_intent = xfs_bmap_free_create_intent,
> + .abort_intent = xfs_bmap_free_abort_intent,
> + .log_item = xfs_bmap_free_log_item,
> + .create_done = xfs_bmap_free_create_done,
> + .finish_item = xfs_bmap_free_finish_item,
> + .cancel_item = xfs_bmap_free_cancel_item,
> +};
> +
> +/* Deferred Item Initialization */
>
> /* Initialize the deferred operation types. */
> void
> xfs_defer_init_types(void)
> {
> + xfs_defer_init_op_type(&xfs_extent_free_defer_type);
> }
>
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