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-rw-r--r--fs/fscache/cookie.c5
-rw-r--r--fs/fscache/internal.h7
-rw-r--r--fs/fscache/object.c3
-rw-r--r--fs/fscache/operation.c31
-rw-r--r--fs/fscache/page.c46
-rw-r--r--include/linux/fscache-cache.h5
6 files changed, 57 insertions, 40 deletions
diff --git a/fs/fscache/cookie.c b/fs/fscache/cookie.c
index 8de22164f5fb..d403c69bee08 100644
--- a/fs/fscache/cookie.c
+++ b/fs/fscache/cookie.c
@@ -672,7 +672,7 @@ int __fscache_check_consistency(struct fscache_cookie *cookie)
if (!op)
return -ENOMEM;
- fscache_operation_init(op, NULL, NULL);
+ fscache_operation_init(op, NULL, NULL, NULL);
op->flags = FSCACHE_OP_MYTHREAD |
(1 << FSCACHE_OP_WAITING) |
(1 << FSCACHE_OP_UNUSE_COOKIE);
@@ -696,8 +696,7 @@ int __fscache_check_consistency(struct fscache_cookie *cookie)
/* the work queue now carries its own ref on the object */
spin_unlock(&cookie->lock);
- ret = fscache_wait_for_operation_activation(object, op,
- NULL, NULL, NULL);
+ ret = fscache_wait_for_operation_activation(object, op, NULL, NULL);
if (ret == 0) {
/* ask the cache to honour the operation */
ret = object->cache->ops->check_consistency(op);
diff --git a/fs/fscache/internal.h b/fs/fscache/internal.h
index a63225116db6..97ec45110957 100644
--- a/fs/fscache/internal.h
+++ b/fs/fscache/internal.h
@@ -124,9 +124,7 @@ extern int fscache_submit_exclusive_op(struct fscache_object *,
struct fscache_operation *);
extern int fscache_submit_op(struct fscache_object *,
struct fscache_operation *);
-extern int fscache_cancel_op(struct fscache_operation *,
- void (*)(struct fscache_operation *),
- bool);
+extern int fscache_cancel_op(struct fscache_operation *, bool);
extern void fscache_cancel_all_ops(struct fscache_object *);
extern void fscache_abort_object(struct fscache_object *);
extern void fscache_start_operations(struct fscache_object *);
@@ -139,8 +137,7 @@ extern int fscache_wait_for_deferred_lookup(struct fscache_cookie *);
extern int fscache_wait_for_operation_activation(struct fscache_object *,
struct fscache_operation *,
atomic_t *,
- atomic_t *,
- void (*)(struct fscache_operation *));
+ atomic_t *);
extern void fscache_invalidate_writes(struct fscache_cookie *);
/*
diff --git a/fs/fscache/object.c b/fs/fscache/object.c
index 40049f7505f0..9e792e30f4db 100644
--- a/fs/fscache/object.c
+++ b/fs/fscache/object.c
@@ -961,7 +961,8 @@ static const struct fscache_state *_fscache_invalidate_object(struct fscache_obj
if (!op)
goto nomem;
- fscache_operation_init(op, object->cache->ops->invalidate_object, NULL);
+ fscache_operation_init(op, object->cache->ops->invalidate_object,
+ NULL, NULL);
op->flags = FSCACHE_OP_ASYNC |
(1 << FSCACHE_OP_EXCLUSIVE) |
(1 << FSCACHE_OP_UNUSE_COOKIE);
diff --git a/fs/fscache/operation.c b/fs/fscache/operation.c
index c76c09730768..57d4abb68656 100644
--- a/fs/fscache/operation.c
+++ b/fs/fscache/operation.c
@@ -20,6 +20,10 @@
atomic_t fscache_op_debug_id;
EXPORT_SYMBOL(fscache_op_debug_id);
+static void fscache_operation_dummy_cancel(struct fscache_operation *op)
+{
+}
+
/**
* fscache_operation_init - Do basic initialisation of an operation
* @op: The operation to initialise
@@ -30,6 +34,7 @@ EXPORT_SYMBOL(fscache_op_debug_id);
*/
void fscache_operation_init(struct fscache_operation *op,
fscache_operation_processor_t processor,
+ fscache_operation_cancel_t cancel,
fscache_operation_release_t release)
{
INIT_WORK(&op->work, fscache_op_work_func);
@@ -37,6 +42,7 @@ void fscache_operation_init(struct fscache_operation *op,
op->state = FSCACHE_OP_ST_INITIALISED;
op->debug_id = atomic_inc_return(&fscache_op_debug_id);
op->processor = processor;
+ op->cancel = cancel ?: fscache_operation_dummy_cancel;
op->release = release;
INIT_LIST_HEAD(&op->pend_link);
fscache_stat(&fscache_n_op_initialised);
@@ -164,9 +170,11 @@ int fscache_submit_exclusive_op(struct fscache_object *object,
flags = READ_ONCE(object->flags);
if (unlikely(!(flags & BIT(FSCACHE_OBJECT_IS_LIVE)))) {
fscache_stat(&fscache_n_op_rejected);
+ op->cancel(op);
op->state = FSCACHE_OP_ST_CANCELLED;
ret = -ENOBUFS;
} else if (unlikely(fscache_cache_is_broken(object))) {
+ op->cancel(op);
op->state = FSCACHE_OP_ST_CANCELLED;
ret = -EIO;
} else if (flags & BIT(FSCACHE_OBJECT_IS_AVAILABLE)) {
@@ -200,10 +208,12 @@ int fscache_submit_exclusive_op(struct fscache_object *object,
fscache_stat(&fscache_n_op_pend);
ret = 0;
} else if (flags & BIT(FSCACHE_OBJECT_KILLED_BY_CACHE)) {
+ op->cancel(op);
op->state = FSCACHE_OP_ST_CANCELLED;
ret = -ENOBUFS;
} else {
fscache_report_unexpected_submission(object, op, ostate);
+ op->cancel(op);
op->state = FSCACHE_OP_ST_CANCELLED;
ret = -ENOBUFS;
}
@@ -245,9 +255,11 @@ int fscache_submit_op(struct fscache_object *object,
flags = READ_ONCE(object->flags);
if (unlikely(!(flags & BIT(FSCACHE_OBJECT_IS_LIVE)))) {
fscache_stat(&fscache_n_op_rejected);
+ op->cancel(op);
op->state = FSCACHE_OP_ST_CANCELLED;
ret = -ENOBUFS;
} else if (unlikely(fscache_cache_is_broken(object))) {
+ op->cancel(op);
op->state = FSCACHE_OP_ST_CANCELLED;
ret = -EIO;
} else if (flags & BIT(FSCACHE_OBJECT_IS_AVAILABLE)) {
@@ -276,11 +288,13 @@ int fscache_submit_op(struct fscache_object *object,
fscache_stat(&fscache_n_op_pend);
ret = 0;
} else if (flags & BIT(FSCACHE_OBJECT_KILLED_BY_CACHE)) {
+ op->cancel(op);
op->state = FSCACHE_OP_ST_CANCELLED;
ret = -ENOBUFS;
} else {
fscache_report_unexpected_submission(object, op, ostate);
ASSERT(!fscache_object_is_active(object));
+ op->cancel(op);
op->state = FSCACHE_OP_ST_CANCELLED;
ret = -ENOBUFS;
}
@@ -335,7 +349,6 @@ void fscache_start_operations(struct fscache_object *object)
* cancel an operation that's pending on an object
*/
int fscache_cancel_op(struct fscache_operation *op,
- void (*do_cancel)(struct fscache_operation *),
bool cancel_in_progress_op)
{
struct fscache_object *object = op->object;
@@ -355,9 +368,9 @@ int fscache_cancel_op(struct fscache_operation *op,
ASSERT(!list_empty(&op->pend_link));
list_del_init(&op->pend_link);
put = true;
+
fscache_stat(&fscache_n_op_cancelled);
- if (do_cancel)
- do_cancel(op);
+ op->cancel(op);
op->state = FSCACHE_OP_ST_CANCELLED;
if (test_bit(FSCACHE_OP_EXCLUSIVE, &op->flags))
object->n_exclusive--;
@@ -373,8 +386,7 @@ int fscache_cancel_op(struct fscache_operation *op,
fscache_start_operations(object);
fscache_stat(&fscache_n_op_cancelled);
- if (do_cancel)
- do_cancel(op);
+ op->cancel(op);
op->state = FSCACHE_OP_ST_CANCELLED;
if (test_bit(FSCACHE_OP_EXCLUSIVE, &op->flags))
object->n_exclusive--;
@@ -408,6 +420,7 @@ void fscache_cancel_all_ops(struct fscache_object *object)
list_del_init(&op->pend_link);
ASSERTCMP(op->state, ==, FSCACHE_OP_ST_PENDING);
+ op->cancel(op);
op->state = FSCACHE_OP_ST_CANCELLED;
if (test_bit(FSCACHE_OP_EXCLUSIVE, &op->flags))
@@ -440,8 +453,12 @@ void fscache_op_complete(struct fscache_operation *op, bool cancelled)
spin_lock(&object->lock);
- op->state = cancelled ?
- FSCACHE_OP_ST_CANCELLED : FSCACHE_OP_ST_COMPLETE;
+ if (!cancelled) {
+ op->state = FSCACHE_OP_ST_COMPLETE;
+ } else {
+ op->cancel(op);
+ op->state = FSCACHE_OP_ST_CANCELLED;
+ }
if (test_bit(FSCACHE_OP_EXCLUSIVE, &op->flags))
object->n_exclusive--;
diff --git a/fs/fscache/page.c b/fs/fscache/page.c
index 7db9752252ef..d1b23a67c031 100644
--- a/fs/fscache/page.c
+++ b/fs/fscache/page.c
@@ -213,7 +213,7 @@ int __fscache_attr_changed(struct fscache_cookie *cookie)
return -ENOMEM;
}
- fscache_operation_init(op, fscache_attr_changed_op, NULL);
+ fscache_operation_init(op, fscache_attr_changed_op, NULL, NULL);
op->flags = FSCACHE_OP_ASYNC |
(1 << FSCACHE_OP_EXCLUSIVE) |
(1 << FSCACHE_OP_UNUSE_COOKIE);
@@ -249,6 +249,17 @@ nobufs:
EXPORT_SYMBOL(__fscache_attr_changed);
/*
+ * Handle cancellation of a pending retrieval op
+ */
+static void fscache_do_cancel_retrieval(struct fscache_operation *_op)
+{
+ struct fscache_retrieval *op =
+ container_of(_op, struct fscache_retrieval, op);
+
+ atomic_set(&op->n_pages, 0);
+}
+
+/*
* release a retrieval op reference
*/
static void fscache_release_retrieval_op(struct fscache_operation *_op)
@@ -285,7 +296,9 @@ static struct fscache_retrieval *fscache_alloc_retrieval(
return NULL;
}
- fscache_operation_init(&op->op, NULL, fscache_release_retrieval_op);
+ fscache_operation_init(&op->op, NULL,
+ fscache_do_cancel_retrieval,
+ fscache_release_retrieval_op);
op->op.flags = FSCACHE_OP_MYTHREAD |
(1UL << FSCACHE_OP_WAITING) |
(1UL << FSCACHE_OP_UNUSE_COOKIE);
@@ -330,24 +343,12 @@ int fscache_wait_for_deferred_lookup(struct fscache_cookie *cookie)
}
/*
- * Handle cancellation of a pending retrieval op
- */
-static void fscache_do_cancel_retrieval(struct fscache_operation *_op)
-{
- struct fscache_retrieval *op =
- container_of(_op, struct fscache_retrieval, op);
-
- atomic_set(&op->n_pages, 0);
-}
-
-/*
* wait for an object to become active (or dead)
*/
int fscache_wait_for_operation_activation(struct fscache_object *object,
struct fscache_operation *op,
atomic_t *stat_op_waits,
- atomic_t *stat_object_dead,
- void (*do_cancel)(struct fscache_operation *))
+ atomic_t *stat_object_dead)
{
int ret;
@@ -359,7 +360,7 @@ 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) {
- ret = fscache_cancel_op(op, do_cancel, false);
+ ret = fscache_cancel_op(op, false);
if (ret == 0)
return -ERESTARTSYS;
@@ -380,7 +381,7 @@ check_if_dead:
if (unlikely(fscache_object_is_dying(object) ||
fscache_cache_is_broken(object))) {
enum fscache_operation_state state = op->state;
- fscache_cancel_op(op, do_cancel, true);
+ fscache_cancel_op(op, true);
if (stat_object_dead)
fscache_stat(stat_object_dead);
_leave(" = -ENOBUFS [obj dead %d]", state);
@@ -464,8 +465,7 @@ int __fscache_read_or_alloc_page(struct fscache_cookie *cookie,
ret = fscache_wait_for_operation_activation(
object, &op->op,
__fscache_stat(&fscache_n_retrieval_op_waits),
- __fscache_stat(&fscache_n_retrievals_object_dead),
- fscache_do_cancel_retrieval);
+ __fscache_stat(&fscache_n_retrievals_object_dead));
if (ret < 0)
goto error;
@@ -595,8 +595,7 @@ int __fscache_read_or_alloc_pages(struct fscache_cookie *cookie,
ret = fscache_wait_for_operation_activation(
object, &op->op,
__fscache_stat(&fscache_n_retrieval_op_waits),
- __fscache_stat(&fscache_n_retrievals_object_dead),
- fscache_do_cancel_retrieval);
+ __fscache_stat(&fscache_n_retrievals_object_dead));
if (ret < 0)
goto error;
@@ -702,8 +701,7 @@ int __fscache_alloc_page(struct fscache_cookie *cookie,
ret = fscache_wait_for_operation_activation(
object, &op->op,
__fscache_stat(&fscache_n_alloc_op_waits),
- __fscache_stat(&fscache_n_allocs_object_dead),
- fscache_do_cancel_retrieval);
+ __fscache_stat(&fscache_n_allocs_object_dead));
if (ret < 0)
goto error;
@@ -946,7 +944,7 @@ int __fscache_write_page(struct fscache_cookie *cookie,
if (!op)
goto nomem;
- fscache_operation_init(&op->op, fscache_write_op,
+ fscache_operation_init(&op->op, fscache_write_op, NULL,
fscache_release_write_op);
op->op.flags = FSCACHE_OP_ASYNC |
(1 << FSCACHE_OP_WAITING) |
diff --git a/include/linux/fscache-cache.h b/include/linux/fscache-cache.h
index 0e26d49972e3..69c6eb10d858 100644
--- a/include/linux/fscache-cache.h
+++ b/include/linux/fscache-cache.h
@@ -74,6 +74,7 @@ extern wait_queue_head_t fscache_cache_cleared_wq;
*/
typedef void (*fscache_operation_release_t)(struct fscache_operation *op);
typedef void (*fscache_operation_processor_t)(struct fscache_operation *op);
+typedef void (*fscache_operation_cancel_t)(struct fscache_operation *op);
enum fscache_operation_state {
FSCACHE_OP_ST_BLANK, /* Op is not yet submitted */
@@ -109,6 +110,9 @@ struct fscache_operation {
* the op in a non-pool thread */
fscache_operation_processor_t processor;
+ /* Operation cancellation cleanup (optional) */
+ fscache_operation_cancel_t cancel;
+
/* operation releaser */
fscache_operation_release_t release;
};
@@ -121,6 +125,7 @@ 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 *,
fscache_operation_processor_t,
+ fscache_operation_cancel_t,
fscache_operation_release_t);
/*
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-26 02:26:09 +0300