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xfs: enable the xfs_defer mechanism to process rmaps to update 

Connect the xfs_defer mechanism with the pieces that we'll need to
handle deferred rmap updates.  We'll wire up the existing code to
our new deferred mechanism later.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:
Darrick J. Wong 2016-08-03 12:11:01 +10:00 committed by Dave Chinner
parent 9e88b5d867
commit f8dbebef98
4 changed files with 134 additions and 10 deletions
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1
fs/xfs/libxfs/xfs_defer.h
View File

@ -51,6 +51,7 @@ struct xfs_defer_pending {
* find all the space it needs.
*/
enum xfs_defer_ops_type {
XFS_DEFER_OPS_TYPE_RMAP,
XFS_DEFER_OPS_TYPE_FREE,
XFS_DEFER_OPS_TYPE_MAX,
};

1
fs/xfs/xfs_super.c
View File

@ -1876,6 +1876,7 @@ init_xfs_fs(void)
XFS_BUILD_OPTIONS " enabled\n");
xfs_extent_free_init_defer_op();
xfs_rmap_update_init_defer_op();
xfs_dir_startup();

11
fs/xfs/xfs_trans.h
View File

@ -33,6 +33,8 @@ struct xfs_trans;
struct xfs_trans_res;
struct xfs_dquot_acct;
struct xfs_busy_extent;
struct xfs_rud_log_item;
struct xfs_rui_log_item;
typedef struct xfs_log_item {
struct list_head li_ail; /* AIL pointers */
@ -233,15 +235,10 @@ void xfs_trans_buf_copy_type(struct xfs_buf *dst_bp,
extern kmem_zone_t *xfs_trans_zone;
extern kmem_zone_t *xfs_log_item_desc_zone;
/* rmap updates */
enum xfs_rmap_intent_type;
struct xfs_rui_log_item *xfs_trans_get_rui(struct xfs_trans *tp, uint nextents);
void xfs_trans_log_start_rmap_update(struct xfs_trans *tp,
struct xfs_rui_log_item *ruip, enum xfs_rmap_intent_type type,
__uint64_t owner, int whichfork, xfs_fileoff_t startoff,
xfs_fsblock_t startblock, xfs_filblks_t blockcount,
xfs_exntst_t state);
void xfs_rmap_update_init_defer_op(void);
struct xfs_rud_log_item *xfs_trans_get_rud(struct xfs_trans *tp,
struct xfs_rui_log_item *ruip, uint nextents);
int xfs_trans_log_finish_rmap_update(struct xfs_trans *tp,

131
fs/xfs/xfs_trans_rmap.c
View File

@ -37,7 +37,7 @@
* caller must use all nextents extents, because we are not
* flexible about this at all.
*/
struct xfs_rui_log_item *
STATIC struct xfs_rui_log_item *
xfs_trans_get_rui(
struct xfs_trans *tp,
uint nextents)
@ -96,7 +96,7 @@ xfs_trans_set_rmap_flags(
* mapping is to be logged as needing to be updated. It should be
* called once for each mapping.
*/
void
STATIC void
xfs_trans_log_start_rmap_update(
struct xfs_trans *tp,
struct xfs_rui_log_item *ruip,
@ -129,7 +129,6 @@ xfs_trans_log_start_rmap_update(
xfs_trans_set_rmap_flags(rmap, type, whichfork, state);
}
/*
* This routine is called to allocate an "rmap update done"
* log item that will hold nextents worth of extents. The
@ -203,3 +202,129 @@ xfs_trans_log_finish_rmap_update(
return error;
}
/* Sort rmap intents by AG. */
static int
xfs_rmap_update_diff_items(
void *priv,
struct list_head *a,
struct list_head *b)
{
struct xfs_mount *mp = priv;
struct xfs_rmap_intent *ra;
struct xfs_rmap_intent *rb;
ra = container_of(a, struct xfs_rmap_intent, ri_list);
rb = container_of(b, struct xfs_rmap_intent, ri_list);
return XFS_FSB_TO_AGNO(mp, ra->ri_bmap.br_startblock) -
XFS_FSB_TO_AGNO(mp, rb->ri_bmap.br_startblock);
}
/* Get an RUI. */
STATIC void *
xfs_rmap_update_create_intent(
struct xfs_trans *tp,
unsigned int count)
{
return xfs_trans_get_rui(tp, count);
}
/* Log rmap updates in the intent item. */
STATIC void
xfs_rmap_update_log_item(
struct xfs_trans *tp,
void *intent,
struct list_head *item)
{
struct xfs_rmap_intent *rmap;
rmap = container_of(item, struct xfs_rmap_intent, ri_list);
xfs_trans_log_start_rmap_update(tp, intent, rmap->ri_type,
rmap->ri_owner, rmap->ri_whichfork,
rmap->ri_bmap.br_startoff,
rmap->ri_bmap.br_startblock,
rmap->ri_bmap.br_blockcount,
rmap->ri_bmap.br_state);
}
/* Get an RUD so we can process all the deferred rmap updates. */
STATIC void *
xfs_rmap_update_create_done(
struct xfs_trans *tp,
void *intent,
unsigned int count)
{
return xfs_trans_get_rud(tp, intent, count);
}
/* Process a deferred rmap update. */
STATIC int
xfs_rmap_update_finish_item(
struct xfs_trans *tp,
struct xfs_defer_ops *dop,
struct list_head *item,
void *done_item,
void **state)
{
struct xfs_rmap_intent *rmap;
int error;
rmap = container_of(item, struct xfs_rmap_intent, ri_list);
error = xfs_trans_log_finish_rmap_update(tp, done_item,
rmap->ri_type,
rmap->ri_owner, rmap->ri_whichfork,
rmap->ri_bmap.br_startoff,
rmap->ri_bmap.br_startblock,
rmap->ri_bmap.br_blockcount,
rmap->ri_bmap.br_state);
kmem_free(rmap);
return error;
}
/* Clean up after processing deferred rmaps. */
STATIC void
xfs_rmap_update_finish_cleanup(
struct xfs_trans *tp,
void *state,
int error)
{
}
/* Abort all pending RUIs. */
STATIC void
xfs_rmap_update_abort_intent(
void *intent)
{
xfs_rui_release(intent);
}
/* Cancel a deferred rmap update. */
STATIC void
xfs_rmap_update_cancel_item(
struct list_head *item)
{
struct xfs_rmap_intent *rmap;
rmap = container_of(item, struct xfs_rmap_intent, ri_list);
kmem_free(rmap);
}
static const struct xfs_defer_op_type xfs_rmap_update_defer_type = {
.type = XFS_DEFER_OPS_TYPE_RMAP,
.max_items = XFS_RUI_MAX_FAST_EXTENTS,
.diff_items = xfs_rmap_update_diff_items,
.create_intent = xfs_rmap_update_create_intent,
.abort_intent = xfs_rmap_update_abort_intent,
.log_item = xfs_rmap_update_log_item,
.create_done = xfs_rmap_update_create_done,
.finish_item = xfs_rmap_update_finish_item,
.finish_cleanup = xfs_rmap_update_finish_cleanup,
.cancel_item = xfs_rmap_update_cancel_item,
};
/* Register the deferred op type. */
void
xfs_rmap_update_init_defer_op(void)
{
xfs_defer_init_op_type(&xfs_rmap_update_defer_type);
}