{},
};
-static bool debugfs_create_files(struct dentry *parent, void *data,
+static void debugfs_create_files(struct dentry *parent, void *data,
const struct blk_mq_debugfs_attr *attr)
{
if (IS_ERR_OR_NULL(parent))
- return false;
+ return;
d_inode(parent)->i_private = data;
- for (; attr->name; attr++) {
- if (!debugfs_create_file(attr->name, attr->mode, parent,
- (void *)attr, &blk_mq_debugfs_fops))
- return false;
- }
- return true;
+ for (; attr->name; attr++)
+ debugfs_create_file(attr->name, attr->mode, parent,
+ (void *)attr, &blk_mq_debugfs_fops);
}
-int blk_mq_debugfs_register(struct request_queue *q)
+void blk_mq_debugfs_register(struct request_queue *q)
{
struct blk_mq_hw_ctx *hctx;
int i;
- if (!blk_debugfs_root)
- return -ENOENT;
-
q->debugfs_dir = debugfs_create_dir(kobject_name(q->kobj.parent),
blk_debugfs_root);
- if (!q->debugfs_dir)
- return -ENOMEM;
- if (!debugfs_create_files(q->debugfs_dir, q,
- blk_mq_debugfs_queue_attrs))
- goto err;
+ debugfs_create_files(q->debugfs_dir, q, blk_mq_debugfs_queue_attrs);
/*
* blk_mq_init_sched() attempted to do this already, but q->debugfs_dir
/* Similarly, blk_mq_init_hctx() couldn't do this previously. */
queue_for_each_hw_ctx(q, hctx, i) {
- if (!hctx->debugfs_dir && blk_mq_debugfs_register_hctx(q, hctx))
- goto err;
- if (q->elevator && !hctx->sched_debugfs_dir &&
- blk_mq_debugfs_register_sched_hctx(q, hctx))
- goto err;
+ if (!hctx->debugfs_dir)
+ blk_mq_debugfs_register_hctx(q, hctx);
+ if (q->elevator && !hctx->sched_debugfs_dir)
+ blk_mq_debugfs_register_sched_hctx(q, hctx);
}
if (q->rq_qos) {
rqos = rqos->next;
}
}
-
- return 0;
-
-err:
- blk_mq_debugfs_unregister(q);
- return -ENOMEM;
}
void blk_mq_debugfs_unregister(struct request_queue *q)
q->debugfs_dir = NULL;
}
-static int blk_mq_debugfs_register_ctx(struct blk_mq_hw_ctx *hctx,
- struct blk_mq_ctx *ctx)
+static void blk_mq_debugfs_register_ctx(struct blk_mq_hw_ctx *hctx,
+ struct blk_mq_ctx *ctx)
{
struct dentry *ctx_dir;
char name[20];
snprintf(name, sizeof(name), "cpu%u", ctx->cpu);
ctx_dir = debugfs_create_dir(name, hctx->debugfs_dir);
- if (!ctx_dir)
- return -ENOMEM;
- if (!debugfs_create_files(ctx_dir, ctx, blk_mq_debugfs_ctx_attrs))
- return -ENOMEM;
-
- return 0;
+ debugfs_create_files(ctx_dir, ctx, blk_mq_debugfs_ctx_attrs);
}
-int blk_mq_debugfs_register_hctx(struct request_queue *q,
- struct blk_mq_hw_ctx *hctx)
+void blk_mq_debugfs_register_hctx(struct request_queue *q,
+ struct blk_mq_hw_ctx *hctx)
{
struct blk_mq_ctx *ctx;
char name[20];
int i;
- if (!q->debugfs_dir)
- return -ENOENT;
-
snprintf(name, sizeof(name), "hctx%u", hctx->queue_num);
hctx->debugfs_dir = debugfs_create_dir(name, q->debugfs_dir);
- if (!hctx->debugfs_dir)
- return -ENOMEM;
- if (!debugfs_create_files(hctx->debugfs_dir, hctx,
- blk_mq_debugfs_hctx_attrs))
- goto err;
-
- hctx_for_each_ctx(hctx, ctx, i) {
- if (blk_mq_debugfs_register_ctx(hctx, ctx))
- goto err;
- }
+ debugfs_create_files(hctx->debugfs_dir, hctx, blk_mq_debugfs_hctx_attrs);
- return 0;
-
-err:
- blk_mq_debugfs_unregister_hctx(hctx);
- return -ENOMEM;
+ hctx_for_each_ctx(hctx, ctx, i)
+ blk_mq_debugfs_register_ctx(hctx, ctx);
}
void blk_mq_debugfs_unregister_hctx(struct blk_mq_hw_ctx *hctx)
hctx->debugfs_dir = NULL;
}
-int blk_mq_debugfs_register_hctxs(struct request_queue *q)
+void blk_mq_debugfs_register_hctxs(struct request_queue *q)
{
struct blk_mq_hw_ctx *hctx;
int i;
- queue_for_each_hw_ctx(q, hctx, i) {
- if (blk_mq_debugfs_register_hctx(q, hctx))
- return -ENOMEM;
- }
-
- return 0;
+ queue_for_each_hw_ctx(q, hctx, i)
+ blk_mq_debugfs_register_hctx(q, hctx);
}
void blk_mq_debugfs_unregister_hctxs(struct request_queue *q)
blk_mq_debugfs_unregister_hctx(hctx);
}
-int blk_mq_debugfs_register_sched(struct request_queue *q)
+void blk_mq_debugfs_register_sched(struct request_queue *q)
{
struct elevator_type *e = q->elevator->type;
+ /*
+ * If the parent directory has not been created yet, return, we will be
+ * called again later on and the directory/files will be created then.
+ */
if (!q->debugfs_dir)
- return -ENOENT;
+ return;
if (!e->queue_debugfs_attrs)
- return 0;
+ return;
q->sched_debugfs_dir = debugfs_create_dir("sched", q->debugfs_dir);
- if (!q->sched_debugfs_dir)
- return -ENOMEM;
-
- if (!debugfs_create_files(q->sched_debugfs_dir, q,
- e->queue_debugfs_attrs))
- goto err;
- return 0;
-
-err:
- blk_mq_debugfs_unregister_sched(q);
- return -ENOMEM;
+ debugfs_create_files(q->sched_debugfs_dir, q, e->queue_debugfs_attrs);
}
void blk_mq_debugfs_unregister_sched(struct request_queue *q)
rqos->debugfs_dir = NULL;
}
-int blk_mq_debugfs_register_rqos(struct rq_qos *rqos)
+void blk_mq_debugfs_register_rqos(struct rq_qos *rqos)
{
struct request_queue *q = rqos->q;
const char *dir_name = rq_qos_id_to_name(rqos->id);
- if (!q->debugfs_dir)
- return -ENOENT;
-
if (rqos->debugfs_dir || !rqos->ops->debugfs_attrs)
- return 0;
+ return;
- if (!q->rqos_debugfs_dir) {
+ if (!q->rqos_debugfs_dir)
q->rqos_debugfs_dir = debugfs_create_dir("rqos",
q->debugfs_dir);
- if (!q->rqos_debugfs_dir)
- return -ENOMEM;
- }
rqos->debugfs_dir = debugfs_create_dir(dir_name,
rqos->q->rqos_debugfs_dir);
- if (!rqos->debugfs_dir)
- return -ENOMEM;
- if (!debugfs_create_files(rqos->debugfs_dir, rqos,
- rqos->ops->debugfs_attrs))
- goto err;
- return 0;
- err:
- blk_mq_debugfs_unregister_rqos(rqos);
- return -ENOMEM;
+ debugfs_create_files(rqos->debugfs_dir, rqos, rqos->ops->debugfs_attrs);
}
void blk_mq_debugfs_unregister_queue_rqos(struct request_queue *q)
q->rqos_debugfs_dir = NULL;
}
-int blk_mq_debugfs_register_sched_hctx(struct request_queue *q,
- struct blk_mq_hw_ctx *hctx)
+void blk_mq_debugfs_register_sched_hctx(struct request_queue *q,
+ struct blk_mq_hw_ctx *hctx)
{
struct elevator_type *e = q->elevator->type;
- if (!hctx->debugfs_dir)
- return -ENOENT;
-
if (!e->hctx_debugfs_attrs)
- return 0;
+ return;
hctx->sched_debugfs_dir = debugfs_create_dir("sched",
hctx->debugfs_dir);
- if (!hctx->sched_debugfs_dir)
- return -ENOMEM;
-
- if (!debugfs_create_files(hctx->sched_debugfs_dir, hctx,
- e->hctx_debugfs_attrs))
- return -ENOMEM;
-
- return 0;
+ debugfs_create_files(hctx->sched_debugfs_dir, hctx,
+ e->hctx_debugfs_attrs);
}
void blk_mq_debugfs_unregister_sched_hctx(struct blk_mq_hw_ctx *hctx)
projects / linux.git / blobdiff