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fscache: Add more tracepoints

Browse Source 
Add more tracepoints to fscache, including:

 (*) fscache_page - Tracks netfs pages known to fscache.

 (*) fscache_check_page - Tracks the netfs querying whether a page is
     pending storage.

 (*) fscache_wake_cookie - Tracks cookies being woken up after a page
     completes/aborts storage in the cache.

 (*) fscache_op - Tracks operations being initialised.

 (*) fscache_wrote_page - Tracks return of the backend write_page op.

 (*) fscache_gang_lookup - Tracks lookup of pages to be stored in the write
     operation.

Signed-off-by: David Howells <dhowells@redhat.com>
This commit is contained in:
David Howells 2018-04-04 13:41:27 +01:00
parent a18feb5576
commit 08c2e3d087
6 changed files with 330 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
fs/fscache/cookie.c
View File

@ -691,10 +691,11 @@ int __fscache_check_consistency(struct fscache_cookie *cookie)
if (!op)
return -ENOMEM;
fscache_operation_init(op, NULL, NULL, NULL);
fscache_operation_init(cookie, op, NULL, NULL, NULL);
op->flags = FSCACHE_OP_MYTHREAD |
(1 << FSCACHE_OP_WAITING) |
(1 << FSCACHE_OP_UNUSE_COOKIE);
trace_fscache_page_op(cookie, NULL, op, fscache_page_op_check_consistency);
spin_lock(&cookie->lock);

3
fs/fscache/object.c
View File

@ -982,11 +982,12 @@ static const struct fscache_state *_fscache_invalidate_object(struct fscache_obj
if (!op)
goto nomem;
fscache_operation_init(op, object->cache->ops->invalidate_object,
fscache_operation_init(cookie, op, object->cache->ops->invalidate_object,
NULL, NULL);
op->flags = FSCACHE_OP_ASYNC |
(1 << FSCACHE_OP_EXCLUSIVE) |
(1 << FSCACHE_OP_UNUSE_COOKIE);
trace_fscache_page_op(cookie, NULL, op, fscache_page_op_invalidate);
spin_lock(&cookie->lock);
if (fscache_submit_exclusive_op(object, op) < 0)

26
fs/fscache/operation.c
View File

@ -32,7 +32,8 @@ static void fscache_operation_dummy_cancel(struct fscache_operation *op)
* Do basic initialisation of an operation. The caller must still set flags,
* object and processor if needed.
*/
void fscache_operation_init(struct fscache_operation *op,
void fscache_operation_init(struct fscache_cookie *cookie,
struct fscache_operation *op,
fscache_operation_processor_t processor,
fscache_operation_cancel_t cancel,
fscache_operation_release_t release)
@ -46,6 +47,7 @@ void fscache_operation_init(struct fscache_operation *op,
op->release = release;
INIT_LIST_HEAD(&op->pend_link);
fscache_stat(&fscache_n_op_initialised);
trace_fscache_op(cookie, op, fscache_op_init);
}
EXPORT_SYMBOL(fscache_operation_init);
@ -59,6 +61,8 @@ EXPORT_SYMBOL(fscache_operation_init);
*/
void fscache_enqueue_operation(struct fscache_operation *op)
{
struct fscache_cookie *cookie = op->object->cookie;
_enter("{OBJ%x OP%x,%u}",
op->object->debug_id, op->debug_id, atomic_read(&op->usage));
@ -71,12 +75,14 @@ void fscache_enqueue_operation(struct fscache_operation *op)
fscache_stat(&fscache_n_op_enqueue);
switch (op->flags & FSCACHE_OP_TYPE) {
case FSCACHE_OP_ASYNC:
trace_fscache_op(cookie, op, fscache_op_enqueue_async);
_debug("queue async");
atomic_inc(&op->usage);
if (!queue_work(fscache_op_wq, &op->work))
fscache_put_operation(op);
break;
case FSCACHE_OP_MYTHREAD:
trace_fscache_op(cookie, op, fscache_op_enqueue_mythread);
_debug("queue for caller's attention");
break;
default:
@ -101,6 +107,8 @@ static void fscache_run_op(struct fscache_object *object,
wake_up_bit(&op->flags, FSCACHE_OP_WAITING);
if (op->processor)
fscache_enqueue_operation(op);
else
trace_fscache_op(object->cookie, op, fscache_op_run);
fscache_stat(&fscache_n_op_run);
}
@ -155,6 +163,8 @@ int fscache_submit_exclusive_op(struct fscache_object *object,
_enter("{OBJ%x OP%x},", object->debug_id, op->debug_id);
trace_fscache_op(object->cookie, op, fscache_op_submit_ex);
ASSERTCMP(op->state, ==, FSCACHE_OP_ST_INITIALISED);
ASSERTCMP(atomic_read(&op->usage), >, 0);
@ -240,6 +250,8 @@ int fscache_submit_op(struct fscache_object *object,
_enter("{OBJ%x OP%x},{%u}",
object->debug_id, op->debug_id, atomic_read(&op->usage));
trace_fscache_op(object->cookie, op, fscache_op_submit);
ASSERTCMP(op->state, ==, FSCACHE_OP_ST_INITIALISED);
ASSERTCMP(atomic_read(&op->usage), >, 0);
@ -357,6 +369,8 @@ int fscache_cancel_op(struct fscache_operation *op,
_enter("OBJ%x OP%x}", op->object->debug_id, op->debug_id);
trace_fscache_op(object->cookie, op, fscache_op_cancel);
ASSERTCMP(op->state, >=, FSCACHE_OP_ST_PENDING);
ASSERTCMP(op->state, !=, FSCACHE_OP_ST_CANCELLED);
ASSERTCMP(atomic_read(&op->usage), >, 0);
@ -419,6 +433,8 @@ void fscache_cancel_all_ops(struct fscache_object *object)
fscache_stat(&fscache_n_op_cancelled);
list_del_init(&op->pend_link);
trace_fscache_op(object->cookie, op, fscache_op_cancel_all);
ASSERTCMP(op->state, ==, FSCACHE_OP_ST_PENDING);
op->cancel(op);
op->state = FSCACHE_OP_ST_CANCELLED;
@ -454,9 +470,11 @@ void fscache_op_complete(struct fscache_operation *op, bool cancelled)
spin_lock(&object->lock);
if (!cancelled) {
trace_fscache_op(object->cookie, op, fscache_op_completed);
op->state = FSCACHE_OP_ST_COMPLETE;
} else {
op->cancel(op);
trace_fscache_op(object->cookie, op, fscache_op_cancelled);
op->state = FSCACHE_OP_ST_CANCELLED;
}
@ -488,6 +506,8 @@ void fscache_put_operation(struct fscache_operation *op)
if (!atomic_dec_and_test(&op->usage))
return;
trace_fscache_op(op->object->cookie, op, fscache_op_put);
_debug("PUT OP");
ASSERTIFCMP(op->state != FSCACHE_OP_ST_INITIALISED &&
op->state != FSCACHE_OP_ST_COMPLETE,
@ -563,6 +583,8 @@ void fscache_operation_gc(struct work_struct *work)
spin_unlock(&cache->op_gc_list_lock);
object = op->object;
trace_fscache_op(object->cookie, op, fscache_op_gc);
spin_lock(&object->lock);
_debug("GC DEFERRED REL OBJ%x OP%x",
@ -601,6 +623,8 @@ void fscache_op_work_func(struct work_struct *work)
_enter("{OBJ%x OP%x,%d}",
op->object->debug_id, op->debug_id, atomic_read(&op->usage));
trace_fscache_op(op->object->cookie, op, fscache_op_work);
ASSERT(op->processor != NULL);
start = jiffies;
op->processor(op);

51
fs/fscache/page.c
View File

@ -27,6 +27,7 @@ bool __fscache_check_page_write(struct fscache_cookie *cookie, struct page *page
rcu_read_lock();
val = radix_tree_lookup(&cookie->stores, page->index);
rcu_read_unlock();
trace_fscache_check_page(cookie, page, val, 0);
return val != NULL;
}
@ -39,6 +40,8 @@ void __fscache_wait_on_page_write(struct fscache_cookie *cookie, struct page *pa
{
wait_queue_head_t *wq = bit_waitqueue(&cookie->flags, 0);
trace_fscache_page(cookie, page, fscache_page_write_wait);
wait_event(*wq, !__fscache_check_page_write(cookie, page));
}
EXPORT_SYMBOL(__fscache_wait_on_page_write);
@ -69,6 +72,8 @@ bool __fscache_maybe_release_page(struct fscache_cookie *cookie,
_enter("%p,%p,%x", cookie, page, gfp);
trace_fscache_page(cookie, page, fscache_page_maybe_release);
try_again:
rcu_read_lock();
val = radix_tree_lookup(&cookie->stores, page->index);
@ -101,6 +106,7 @@ bool __fscache_maybe_release_page(struct fscache_cookie *cookie,
}
xpage = radix_tree_delete(&cookie->stores, page->index);
trace_fscache_page(cookie, page, fscache_page_radix_delete);
spin_unlock(&cookie->stores_lock);
if (xpage) {
@ -112,6 +118,7 @@ bool __fscache_maybe_release_page(struct fscache_cookie *cookie,
}
wake_up_bit(&cookie->flags, 0);
trace_fscache_wake_cookie(cookie);
if (xpage)
put_page(xpage);
__fscache_uncache_page(cookie, page);
@ -144,7 +151,7 @@ static void fscache_end_page_write(struct fscache_object *object,
struct page *page)
{
struct fscache_cookie *cookie;
struct page *xpage = NULL;
struct page *xpage = NULL, *val;
spin_lock(&object->lock);
cookie = object->cookie;
@ -154,13 +161,24 @@ static void fscache_end_page_write(struct fscache_object *object,
spin_lock(&cookie->stores_lock);
radix_tree_tag_clear(&cookie->stores, page->index,
FSCACHE_COOKIE_STORING_TAG);
trace_fscache_page(cookie, page, fscache_page_radix_clear_store);
if (!radix_tree_tag_get(&cookie->stores, page->index,
FSCACHE_COOKIE_PENDING_TAG)) {
fscache_stat(&fscache_n_store_radix_deletes);
xpage = radix_tree_delete(&cookie->stores, page->index);
trace_fscache_page(cookie, page, fscache_page_radix_delete);
trace_fscache_page(cookie, page, fscache_page_write_end);
val = radix_tree_lookup(&cookie->stores, page->index);
trace_fscache_check_page(cookie, page, val, 1);
} else {
trace_fscache_page(cookie, page, fscache_page_write_end_pend);
}
spin_unlock(&cookie->stores_lock);
wake_up_bit(&cookie->flags, 0);
trace_fscache_wake_cookie(cookie);
} else {
trace_fscache_page(cookie, page, fscache_page_write_end_noc);
}
spin_unlock(&object->lock);
if (xpage)
@ -215,7 +233,8 @@ int __fscache_attr_changed(struct fscache_cookie *cookie)
return -ENOMEM;
}
fscache_operation_init(op, fscache_attr_changed_op, NULL, NULL);
fscache_operation_init(cookie, op, fscache_attr_changed_op, NULL, NULL);
trace_fscache_page_op(cookie, NULL, op, fscache_page_op_attr_changed);
op->flags = FSCACHE_OP_ASYNC |
(1 << FSCACHE_OP_EXCLUSIVE) |
(1 << FSCACHE_OP_UNUSE_COOKIE);
@ -299,7 +318,7 @@ static struct fscache_retrieval *fscache_alloc_retrieval(
return NULL;
}
fscache_operation_init(&op->op, NULL,
fscache_operation_init(cookie, &op->op, NULL,
fscache_do_cancel_retrieval,
fscache_release_retrieval_op);
op->op.flags = FSCACHE_OP_MYTHREAD |
@ -370,6 +389,7 @@ int fscache_wait_for_operation_activation(struct fscache_object *object,
fscache_stat(stat_op_waits);
if (wait_on_bit(&op->flags, FSCACHE_OP_WAITING,
TASK_INTERRUPTIBLE) != 0) {
trace_fscache_op(object->cookie, op, fscache_op_signal);
ret = fscache_cancel_op(op, false);
if (ret == 0)
return -ERESTARTSYS;
@ -391,6 +411,7 @@ int fscache_wait_for_operation_activation(struct fscache_object *object,
if (unlikely(fscache_object_is_dying(object) ||
fscache_cache_is_broken(object))) {
enum fscache_operation_state state = op->state;
trace_fscache_op(object->cookie, op, fscache_op_signal);
fscache_cancel_op(op, true);
if (stat_object_dead)
fscache_stat(stat_object_dead);
@ -445,6 +466,7 @@ int __fscache_read_or_alloc_page(struct fscache_cookie *cookie,
return -ENOMEM;
}
atomic_set(&op->n_pages, 1);
trace_fscache_page_op(cookie, page, &op->op, fscache_page_op_retr_one);
spin_lock(&cookie->lock);
@ -573,6 +595,7 @@ int __fscache_read_or_alloc_pages(struct fscache_cookie *cookie,
if (!op)
return -ENOMEM;
atomic_set(&op->n_pages, *nr_pages);
trace_fscache_page_op(cookie, NULL, &op->op, fscache_page_op_retr_multi);
spin_lock(&cookie->lock);
@ -684,6 +707,7 @@ int __fscache_alloc_page(struct fscache_cookie *cookie,
if (!op)
return -ENOMEM;
atomic_set(&op->n_pages, 1);
trace_fscache_page_op(cookie, page, &op->op, fscache_page_op_alloc_one);
spin_lock(&cookie->lock);
@ -813,9 +837,11 @@ static void fscache_write_op(struct fscache_operation *_op)
fscache_stat(&fscache_n_store_calls);
/* find a page to store */
results[0] = NULL;
page = NULL;
n = radix_tree_gang_lookup_tag(&cookie->stores, results, 0, 1,
FSCACHE_COOKIE_PENDING_TAG);
trace_fscache_gang_lookup(cookie, &op->op, results, n, op->store_limit);
if (n != 1)
goto superseded;
page = results[0];
@ -825,6 +851,7 @@ static void fscache_write_op(struct fscache_operation *_op)
FSCACHE_COOKIE_STORING_TAG);
radix_tree_tag_clear(&cookie->stores, page->index,
FSCACHE_COOKIE_PENDING_TAG);
trace_fscache_page(cookie, page, fscache_page_radix_pend2store);
spin_unlock(&cookie->stores_lock);
spin_unlock(&object->lock);
@ -836,6 +863,7 @@ static void fscache_write_op(struct fscache_operation *_op)
fscache_stat(&fscache_n_cop_write_page);
ret = object->cache->ops->write_page(op, page);
fscache_stat_d(&fscache_n_cop_write_page);
trace_fscache_wrote_page(cookie, page, &op->op, ret);
fscache_end_page_write(object, page);
if (ret < 0) {
fscache_abort_object(object);
@ -849,6 +877,7 @@ static void fscache_write_op(struct fscache_operation *_op)
discard_page:
fscache_stat(&fscache_n_store_pages_over_limit);
trace_fscache_wrote_page(cookie, page, &op->op, -ENOBUFS);
fscache_end_page_write(object, page);
goto again;
@ -887,6 +916,8 @@ void fscache_invalidate_writes(struct fscache_cookie *cookie)
for (i = n - 1; i >= 0; i--) {
page = results[i];
radix_tree_delete(&cookie->stores, page->index);
trace_fscache_page(cookie, page, fscache_page_radix_delete);
trace_fscache_page(cookie, page, fscache_page_inval);
}
spin_unlock(&cookie->stores_lock);
@ -896,6 +927,7 @@ void fscache_invalidate_writes(struct fscache_cookie *cookie)
}
wake_up_bit(&cookie->flags, 0);
trace_fscache_wake_cookie(cookie);
_leave("");
}
@ -954,7 +986,7 @@ int __fscache_write_page(struct fscache_cookie *cookie,
if (!op)
goto nomem;
fscache_operation_init(&op->op, fscache_write_op, NULL,
fscache_operation_init(cookie, &op->op, fscache_write_op, NULL,
fscache_release_write_op);
op->op.flags = FSCACHE_OP_ASYNC |
(1 << FSCACHE_OP_WAITING) |
@ -964,6 +996,8 @@ int __fscache_write_page(struct fscache_cookie *cookie,
if (ret < 0)
goto nomem_free;
trace_fscache_page_op(cookie, page, &op->op, fscache_page_op_write_one);
ret = -ENOBUFS;
spin_lock(&cookie->lock);
@ -975,6 +1009,8 @@ int __fscache_write_page(struct fscache_cookie *cookie,
if (test_bit(FSCACHE_IOERROR, &object->cache->flags))
goto nobufs;
trace_fscache_page(cookie, page, fscache_page_write);
/* add the page to the pending-storage radix tree on the backing
* object */
spin_lock(&object->lock);
@ -990,8 +1026,10 @@ int __fscache_write_page(struct fscache_cookie *cookie,
goto nobufs_unlock_obj;
}
trace_fscache_page(cookie, page, fscache_page_radix_insert);
radix_tree_tag_set(&cookie->stores, page->index,
FSCACHE_COOKIE_PENDING_TAG);
trace_fscache_page(cookie, page, fscache_page_radix_set_pend);
get_page(page);
/* we only want one writer at a time, but we do need to queue new
@ -1034,6 +1072,7 @@ int __fscache_write_page(struct fscache_cookie *cookie,
submit_failed:
spin_lock(&cookie->stores_lock);
radix_tree_delete(&cookie->stores, page->index);
trace_fscache_page(cookie, page, fscache_page_radix_delete);
spin_unlock(&cookie->stores_lock);
wake_cookie = __fscache_unuse_cookie(cookie);
put_page(page);
@ -1080,6 +1119,8 @@ void __fscache_uncache_page(struct fscache_cookie *cookie, struct page *page)
if (!PageFsCache(page))
goto done;
trace_fscache_page(cookie, page, fscache_page_uncache);
/* get the object */
spin_lock(&cookie->lock);
@ -1128,6 +1169,8 @@ void fscache_mark_page_cached(struct fscache_retrieval *op, struct page *page)
atomic_inc(&fscache_n_marks);
#endif
trace_fscache_page(cookie, page, fscache_page_cached);
_debug("- mark %p{%lx}", page, page->index);
if (TestSetPageFsCache(page)) {
static bool once_only;

3
include/linux/fscache-cache.h
View File

@ -135,7 +135,8 @@ extern void fscache_op_work_func(struct work_struct *work);
extern void fscache_enqueue_operation(struct fscache_operation *);
extern void fscache_op_complete(struct fscache_operation *, bool);
extern void fscache_put_operation(struct fscache_operation *);
extern void fscache_operation_init(struct fscache_operation *,
extern void fscache_operation_init(struct fscache_cookie *,
struct fscache_operation *,
fscache_operation_processor_t,
fscache_operation_cancel_t,
fscache_operation_release_t);

252
include/trace/events/fscache.h
View File

@ -33,6 +33,53 @@ enum fscache_cookie_trace {
fscache_cookie_put_parent,
};
enum fscache_page_trace {
fscache_page_cached,
fscache_page_inval,
fscache_page_maybe_release,
fscache_page_radix_clear_store,
fscache_page_radix_delete,
fscache_page_radix_insert,
fscache_page_radix_pend2store,
fscache_page_radix_set_pend,
fscache_page_uncache,
fscache_page_write,
fscache_page_write_end,
fscache_page_write_end_pend,
fscache_page_write_end_noc,
fscache_page_write_wait,
fscache_page_trace__nr
};
enum fscache_op_trace {
fscache_op_cancel,
fscache_op_cancel_all,
fscache_op_cancelled,
fscache_op_completed,
fscache_op_enqueue_async,
fscache_op_enqueue_mythread,
fscache_op_gc,
fscache_op_init,
fscache_op_put,
fscache_op_run,
fscache_op_signal,
fscache_op_submit,
fscache_op_submit_ex,
fscache_op_work,
fscache_op_trace__nr
};
enum fscache_page_op_trace {
fscache_page_op_alloc_one,
fscache_page_op_attr_changed,
fscache_page_op_check_consistency,
fscache_page_op_invalidate,
fscache_page_op_retr_multi,
fscache_page_op_retr_one,
fscache_page_op_write_one,
fscache_page_op_trace__nr
};
#endif
/*
@ -47,6 +94,47 @@ enum fscache_cookie_trace {
EM(fscache_cookie_put_object, "PUT obj") \
E_(fscache_cookie_put_parent, "PUT prn")
#define fscache_page_traces \
EM(fscache_page_cached, "Cached ") \
EM(fscache_page_inval, "InvalPg") \
EM(fscache_page_maybe_release, "MayRels") \
EM(fscache_page_uncache, "Uncache") \
EM(fscache_page_radix_clear_store, "RxCStr ") \
EM(fscache_page_radix_delete, "RxDel ") \
EM(fscache_page_radix_insert, "RxIns ") \
EM(fscache_page_radix_pend2store, "RxP2S ") \
EM(fscache_page_radix_set_pend, "RxSPend ") \
EM(fscache_page_write, "WritePg") \
EM(fscache_page_write_end, "EndPgWr") \
EM(fscache_page_write_end_pend, "EndPgWP") \
EM(fscache_page_write_end_noc, "EndPgNC") \
E_(fscache_page_write_wait, "WtOnWrt")
#define fscache_op_traces \
EM(fscache_op_cancel, "Cancel1") \
EM(fscache_op_cancel_all, "CancelA") \
EM(fscache_op_cancelled, "Canclld") \
EM(fscache_op_completed, "Complet") \
EM(fscache_op_enqueue_async, "EnqAsyn") \
EM(fscache_op_enqueue_mythread, "EnqMyTh") \
EM(fscache_op_gc, "GC ") \
EM(fscache_op_init, "Init ") \
EM(fscache_op_put, "Put ") \
EM(fscache_op_run, "Run ") \
EM(fscache_op_signal, "Signal ") \
EM(fscache_op_submit, "Submit ") \
EM(fscache_op_submit_ex, "SubmitX") \
E_(fscache_op_work, "Work ")
#define fscache_page_op_traces \
EM(fscache_page_op_alloc_one, "Alloc1 ") \
EM(fscache_page_op_attr_changed, "AttrChg") \
EM(fscache_page_op_check_consistency, "CheckCn") \
EM(fscache_page_op_invalidate, "Inval ") \
EM(fscache_page_op_retr_multi, "RetrMul") \
EM(fscache_page_op_retr_one, "Retr1 ") \
E_(fscache_page_op_write_one, "Write1 ")
/*
* Export enum symbols via userspace.
*/
@ -271,6 +359,170 @@ TRACE_EVENT(fscache_osm,
__entry->event_num)
);
TRACE_EVENT(fscache_page,
TP_PROTO(struct fscache_cookie *cookie, struct page *page,
enum fscache_page_trace why),
TP_ARGS(cookie, page, why),
TP_STRUCT__entry(
__field(struct fscache_cookie *, cookie )
__field(pgoff_t, page )
__field(enum fscache_page_trace, why )
),
TP_fast_assign(
__entry->cookie = cookie;
__entry->page = page->index;
__entry->why = why;
),
TP_printk("c=%p %s pg=%lx",
__entry->cookie,
__print_symbolic(__entry->why, fscache_page_traces),
__entry->page)
);
TRACE_EVENT(fscache_check_page,
TP_PROTO(struct fscache_cookie *cookie, struct page *page,
void *val, int n),
TP_ARGS(cookie, page, val, n),
TP_STRUCT__entry(
__field(struct fscache_cookie *, cookie )
__field(void *, page )
__field(void *, val )
__field(int, n )
),
TP_fast_assign(
__entry->cookie = cookie;
__entry->page = page;
__entry->val = val;
__entry->n = n;
),
TP_printk("c=%p pg=%p val=%p n=%d",
__entry->cookie, __entry->page, __entry->val, __entry->n)
);
TRACE_EVENT(fscache_wake_cookie,
TP_PROTO(struct fscache_cookie *cookie),
TP_ARGS(cookie),
TP_STRUCT__entry(
__field(struct fscache_cookie *, cookie )
),
TP_fast_assign(
__entry->cookie = cookie;
),
TP_printk("c=%p", __entry->cookie)
);
TRACE_EVENT(fscache_op,
TP_PROTO(struct fscache_cookie *cookie, struct fscache_operation *op,
enum fscache_op_trace why),
TP_ARGS(cookie, op, why),
TP_STRUCT__entry(
__field(struct fscache_cookie *, cookie )
__field(struct fscache_operation *, op )
__field(enum fscache_op_trace, why )
),
TP_fast_assign(
__entry->cookie = cookie;
__entry->op = op;
__entry->why = why;
),
TP_printk("c=%p op=%p %s",
__entry->cookie, __entry->op,
__print_symbolic(__entry->why, fscache_op_traces))
);
TRACE_EVENT(fscache_page_op,
TP_PROTO(struct fscache_cookie *cookie, struct page *page,
struct fscache_operation *op, enum fscache_page_op_trace what),
TP_ARGS(cookie, page, op, what),
TP_STRUCT__entry(
__field(struct fscache_cookie *, cookie )
__field(pgoff_t, page )
__field(struct fscache_operation *, op )
__field(enum fscache_page_op_trace, what )
),
TP_fast_assign(
__entry->cookie = cookie;
__entry->page = page ? page->index : 0;
__entry->op = op;
__entry->what = what;
),
TP_printk("c=%p %s pg=%lx op=%p",
__entry->cookie,
__print_symbolic(__entry->what, fscache_page_op_traces),
__entry->page, __entry->op)
);
TRACE_EVENT(fscache_wrote_page,
TP_PROTO(struct fscache_cookie *cookie, struct page *page,
struct fscache_operation *op, int ret),
TP_ARGS(cookie, page, op, ret),
TP_STRUCT__entry(
__field(struct fscache_cookie *, cookie )
__field(pgoff_t, page )
__field(struct fscache_operation *, op )
__field(int, ret )
),
TP_fast_assign(
__entry->cookie = cookie;
__entry->page = page->index;
__entry->op = op;
__entry->ret = ret;
),
TP_printk("c=%p pg=%lx op=%p ret=%d",
__entry->cookie, __entry->page, __entry->op, __entry->ret)
);
TRACE_EVENT(fscache_gang_lookup,
TP_PROTO(struct fscache_cookie *cookie, struct fscache_operation *op,
void **results, int n, pgoff_t store_limit),
TP_ARGS(cookie, op, results, n, store_limit),
TP_STRUCT__entry(
__field(struct fscache_cookie *, cookie )
__field(struct fscache_operation *, op )
__field(pgoff_t, results0 )
__field(int, n )
__field(pgoff_t, store_limit )
),
TP_fast_assign(
__entry->cookie = cookie;
__entry->op = op;
__entry->results0 = results[0] ? ((struct page *)results[0])->index : (pgoff_t)-1;
__entry->n = n;
__entry->store_limit = store_limit;
),
TP_printk("c=%p op=%p r0=%lx n=%d sl=%lx",
__entry->cookie, __entry->op, __entry->results0, __entry->n,
__entry->store_limit)
);
#endif /* _TRACE_FSCACHE_H */
/* This part must be outside protection */