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xfs: streamline defer op type handling

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There's no need to bundle a pointer to the defer op type into the defer
op control structure.  Instead, store the defer op type enum, which
enables us to shorten some of the lines.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
This commit is contained in:
Darrick J. Wong 2018-12-12 08:46:22 -08:00
parent bc9f2b7c8a
commit 02b100fb83
7 changed files with 43 additions and 45 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

50
fs/xfs/libxfs/xfs_defer.c
View File

@ -191,15 +191,15 @@ xfs_defer_create_intents(
{
struct list_head *li;
struct xfs_defer_pending *dfp;
const struct xfs_defer_op_type *ops;
list_for_each_entry(dfp, &tp->t_dfops, dfp_list) {
dfp->dfp_intent = dfp->dfp_type->create_intent(tp,
dfp->dfp_count);
ops = defer_op_types[dfp->dfp_type];
dfp->dfp_intent = ops->create_intent(tp, dfp->dfp_count);
trace_xfs_defer_create_intent(tp->t_mountp, dfp);
list_sort(tp->t_mountp, &dfp->dfp_work,
dfp->dfp_type->diff_items);
list_sort(tp->t_mountp, &dfp->dfp_work, ops->diff_items);
list_for_each(li, &dfp->dfp_work)
dfp->dfp_type->log_item(tp, dfp->dfp_intent, li);
ops->log_item(tp, dfp->dfp_intent, li);
}
}
@ -210,14 +210,16 @@ xfs_defer_trans_abort(
struct list_head *dop_pending)
{
struct xfs_defer_pending *dfp;
const struct xfs_defer_op_type *ops;
trace_xfs_defer_trans_abort(tp, _RET_IP_);
/* Abort intent items that don't have a done item. */
list_for_each_entry(dfp, dop_pending, dfp_list) {
ops = defer_op_types[dfp->dfp_type];
trace_xfs_defer_pending_abort(tp->t_mountp, dfp);
if (dfp->dfp_intent && !dfp->dfp_done) {
dfp->dfp_type->abort_intent(dfp->dfp_intent);
ops->abort_intent(dfp->dfp_intent);
dfp->dfp_intent = NULL;
}
}
@ -321,18 +323,20 @@ xfs_defer_cancel_list(
struct xfs_defer_pending *pli;
struct list_head *pwi;
struct list_head *n;
const struct xfs_defer_op_type *ops;
/*
* Free the pending items. Caller should already have arranged
* for the intent items to be released.
*/
list_for_each_entry_safe(dfp, pli, dop_list, dfp_list) {
ops = defer_op_types[dfp->dfp_type];
trace_xfs_defer_cancel_list(mp, dfp);
list_del(&dfp->dfp_list);
list_for_each_safe(pwi, n, &dfp->dfp_work) {
list_del(pwi);
dfp->dfp_count--;
dfp->dfp_type->cancel_item(pwi);
ops->cancel_item(pwi);
}
ASSERT(dfp->dfp_count == 0);
kmem_free(dfp);
@ -356,7 +360,7 @@ xfs_defer_finish_noroll(
struct list_head *n;
void *state;
int error = 0;
void (*cleanup_fn)(struct xfs_trans *, void *, int);
const struct xfs_defer_op_type *ops;
LIST_HEAD(dop_pending);
ASSERT((*tp)->t_flags & XFS_TRANS_PERM_LOG_RES);
@ -379,18 +383,18 @@ xfs_defer_finish_noroll(
/* Log an intent-done item for the first pending item. */
dfp = list_first_entry(&dop_pending, struct xfs_defer_pending,
dfp_list);
ops = defer_op_types[dfp->dfp_type];
trace_xfs_defer_pending_finish((*tp)->t_mountp, dfp);
dfp->dfp_done = dfp->dfp_type->create_done(*tp, dfp->dfp_intent,
dfp->dfp_done = ops->create_done(*tp, dfp->dfp_intent,
dfp->dfp_count);
cleanup_fn = dfp->dfp_type->finish_cleanup;
/* Finish the work items. */
state = NULL;
list_for_each_safe(li, n, &dfp->dfp_work) {
list_del(li);
dfp->dfp_count--;
error = dfp->dfp_type->finish_item(*tp, li,
dfp->dfp_done, &state);
error = ops->finish_item(*tp, li, dfp->dfp_done,
&state);
if (error == -EAGAIN) {
/*
* Caller wants a fresh transaction;
@ -406,8 +410,8 @@ xfs_defer_finish_noroll(
* xfs_defer_cancel will take care of freeing
* all these lists and stuff.
*/
if (cleanup_fn)
cleanup_fn(*tp, state, error);
if (ops->finish_cleanup)
ops->finish_cleanup(*tp, state, error);
goto out;
}
}
@ -419,20 +423,19 @@ xfs_defer_finish_noroll(
* a Fresh Transaction while Finishing
* Deferred Work" above.
*/
dfp->dfp_intent = dfp->dfp_type->create_intent(*tp,
dfp->dfp_intent = ops->create_intent(*tp,
dfp->dfp_count);
dfp->dfp_done = NULL;
list_for_each(li, &dfp->dfp_work)
dfp->dfp_type->log_item(*tp, dfp->dfp_intent,
li);
ops->log_item(*tp, dfp->dfp_intent, li);
} else {
/* Done with the dfp, free it. */
list_del(&dfp->dfp_list);
kmem_free(dfp);
}
if (cleanup_fn)
cleanup_fn(*tp, state, error);
if (ops->finish_cleanup)
ops->finish_cleanup(*tp, state, error);
}
out:
@ -492,6 +495,7 @@ xfs_defer_add(
struct list_head *li)
{
struct xfs_defer_pending *dfp = NULL;
const struct xfs_defer_op_type *ops;
ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES);
BUILD_BUG_ON(ARRAY_SIZE(defer_op_types) != XFS_DEFER_OPS_TYPE_MAX);
@ -504,15 +508,15 @@ xfs_defer_add(
if (!list_empty(&tp->t_dfops)) {
dfp = list_last_entry(&tp->t_dfops,
struct xfs_defer_pending, dfp_list);
if (dfp->dfp_type->type != type ||
(dfp->dfp_type->max_items &&
dfp->dfp_count >= dfp->dfp_type->max_items))
ops = defer_op_types[dfp->dfp_type];
if (dfp->dfp_type != type ||
(ops->max_items && dfp->dfp_count >= ops->max_items))
dfp = NULL;
}
if (!dfp) {
dfp = kmem_alloc(sizeof(struct xfs_defer_pending),
KM_SLEEP | KM_NOFS);
dfp->dfp_type = defer_op_types[type];
dfp->dfp_type = type;
dfp->dfp_intent = NULL;
dfp->dfp_done = NULL;
dfp->dfp_count = 0;

31
fs/xfs/libxfs/xfs_defer.h
View File

@ -8,20 +8,6 @@
struct xfs_defer_op_type;
/*
* Save a log intent item and a list of extents, so that we can replay
* whatever action had to happen to the extent list and file the log done
* item.
*/
struct xfs_defer_pending {
const struct xfs_defer_op_type *dfp_type; /* function pointers */
struct list_head dfp_list; /* pending items */
void *dfp_intent; /* log intent item */
void *dfp_done; /* log done item */
struct list_head dfp_work; /* work items */
unsigned int dfp_count; /* # extent items */
};
/*
* Header for deferred operation list.
*/
@ -34,6 +20,20 @@ enum xfs_defer_ops_type {
XFS_DEFER_OPS_TYPE_MAX,
};
/*
* Save a log intent item and a list of extents, so that we can replay
* whatever action had to happen to the extent list and file the log done
* item.
*/
struct xfs_defer_pending {
struct list_head dfp_list; /* pending items */
struct list_head dfp_work; /* work items */
void *dfp_intent; /* log intent item */
void *dfp_done; /* log done item */
unsigned int dfp_count; /* # extent items */
enum xfs_defer_ops_type dfp_type;
};
void xfs_defer_add(struct xfs_trans *tp, enum xfs_defer_ops_type type,
struct list_head *h);
int xfs_defer_finish_noroll(struct xfs_trans **tp);
@ -43,8 +43,6 @@ void xfs_defer_move(struct xfs_trans *dtp, struct xfs_trans *stp);
/* Description of a deferred type. */
struct xfs_defer_op_type {
enum xfs_defer_ops_type type;
unsigned int max_items;
void (*abort_intent)(void *);
void *(*create_done)(struct xfs_trans *, void *, unsigned int);
int (*finish_item)(struct xfs_trans *, struct list_head *, void *,
@ -54,6 +52,7 @@ struct xfs_defer_op_type {
int (*diff_items)(void *, struct list_head *, struct list_head *);
void *(*create_intent)(struct xfs_trans *, uint);
void (*log_item)(struct xfs_trans *, void *, struct list_head *);
unsigned int max_items;
};
extern const struct xfs_defer_op_type xfs_bmap_update_defer_type;

2
fs/xfs/xfs_trace.h
View File

@ -2276,7 +2276,7 @@ DECLARE_EVENT_CLASS(xfs_defer_pending_class,
),
TP_fast_assign(
__entry->dev = mp ? mp->m_super->s_dev : 0;
__entry->type = dfp->dfp_type->type;
__entry->type = dfp->dfp_type;
__entry->intent = dfp->dfp_intent;
__entry->committed = dfp->dfp_done != NULL;
__entry->nr = dfp->dfp_count;

1
fs/xfs/xfs_trans_bmap.c
View File

@ -222,7 +222,6 @@ xfs_bmap_update_cancel_item(
}
const struct xfs_defer_op_type xfs_bmap_update_defer_type = {
.type = XFS_DEFER_OPS_TYPE_BMAP,
.max_items = XFS_BUI_MAX_FAST_EXTENTS,
.diff_items = xfs_bmap_update_diff_items,
.create_intent = xfs_bmap_update_create_intent,

2
fs/xfs/xfs_trans_extfree.c
View File

@ -208,7 +208,6 @@ xfs_extent_free_cancel_item(
}
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_extent_free_diff_items,
.create_intent = xfs_extent_free_create_intent,
@ -276,7 +275,6 @@ xfs_agfl_free_finish_item(
/* sub-type with special handling for AGFL deferred frees */
const struct xfs_defer_op_type xfs_agfl_free_defer_type = {
.type = XFS_DEFER_OPS_TYPE_AGFL_FREE,
.max_items = XFS_EFI_MAX_FAST_EXTENTS,
.diff_items = xfs_extent_free_diff_items,
.create_intent = xfs_extent_free_create_intent,

1
fs/xfs/xfs_trans_refcount.c
View File

@ -229,7 +229,6 @@ xfs_refcount_update_cancel_item(
}
const struct xfs_defer_op_type xfs_refcount_update_defer_type = {
.type = XFS_DEFER_OPS_TYPE_REFCOUNT,
.max_items = XFS_CUI_MAX_FAST_EXTENTS,
.diff_items = xfs_refcount_update_diff_items,
.create_intent = xfs_refcount_update_create_intent,

1
fs/xfs/xfs_trans_rmap.c
View File

@ -246,7 +246,6 @@ xfs_rmap_update_cancel_item(
}
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,