bool connected;
long in_flight;
struct completion in_flight_zero; /* No inflight requests */
+ struct kobject *kobj;
char name[VQ_NAME_LEN];
} ____cacheline_aligned_in_smp;
/* A virtio-fs device instance */
struct virtio_fs {
struct kobject kobj;
+ struct kobject *mqs_kobj;
struct list_head list; /* on virtio_fs_instances */
char *tag;
struct virtio_fs_vq *vqs;
.default_groups = virtio_fs_groups,
};
+static struct virtio_fs_vq *virtio_fs_kobj_to_vq(struct virtio_fs *fs,
+ struct kobject *kobj)
+{
+ int i;
+
+ for (i = 0; i < fs->nvqs; i++) {
+ if (kobj == fs->vqs[i].kobj)
+ return &fs->vqs[i];
+ }
+ return NULL;
+}
+
+static ssize_t name_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *buf)
+{
+ struct virtio_fs *fs = container_of(kobj->parent->parent, struct virtio_fs, kobj);
+ struct virtio_fs_vq *fsvq = virtio_fs_kobj_to_vq(fs, kobj);
+
+ if (!fsvq)
+ return -EINVAL;
+ return sysfs_emit(buf, "%s\n", fsvq->name);
+}
+
+static struct kobj_attribute virtio_fs_vq_name_attr = __ATTR_RO(name);
+
+static ssize_t cpu_list_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *buf)
+{
+ struct virtio_fs *fs = container_of(kobj->parent->parent, struct virtio_fs, kobj);
+ struct virtio_fs_vq *fsvq = virtio_fs_kobj_to_vq(fs, kobj);
+ unsigned int cpu, qid;
+ const size_t size = PAGE_SIZE - 1;
+ bool first = true;
+ int ret = 0, pos = 0;
+
+ if (!fsvq)
+ return -EINVAL;
+
+ qid = fsvq->vq->index;
+ for (cpu = 0; cpu < nr_cpu_ids; cpu++) {
+ if (qid < VQ_REQUEST || (fs->mq_map[cpu] == qid - VQ_REQUEST)) {
+ if (first)
+ ret = snprintf(buf + pos, size - pos, "%u", cpu);
+ else
+ ret = snprintf(buf + pos, size - pos, ", %u", cpu);
+
+ if (ret >= size - pos)
+ break;
+ first = false;
+ pos += ret;
+ }
+ }
+ ret = snprintf(buf + pos, size + 1 - pos, "\n");
+ return pos + ret;
+}
+
+static struct kobj_attribute virtio_fs_vq_cpu_list_attr = __ATTR_RO(cpu_list);
+
+static struct attribute *virtio_fs_vq_attrs[] = {
+ &virtio_fs_vq_name_attr.attr,
+ &virtio_fs_vq_cpu_list_attr.attr,
+ NULL
+};
+
+static struct attribute_group virtio_fs_vq_attr_group = {
+ .attrs = virtio_fs_vq_attrs,
+};
+
/* Make sure virtiofs_mutex is held */
static void virtio_fs_put_locked(struct virtio_fs *fs)
{
}
}
+static void virtio_fs_delete_queues_sysfs(struct virtio_fs *fs)
+{
+ struct virtio_fs_vq *fsvq;
+ int i;
+
+ for (i = 0; i < fs->nvqs; i++) {
+ fsvq = &fs->vqs[i];
+ kobject_put(fsvq->kobj);
+ }
+}
+
+static int virtio_fs_add_queues_sysfs(struct virtio_fs *fs)
+{
+ struct virtio_fs_vq *fsvq;
+ char buff[12];
+ int i, j, ret;
+
+ for (i = 0; i < fs->nvqs; i++) {
+ fsvq = &fs->vqs[i];
+
+ sprintf(buff, "%d", i);
+ fsvq->kobj = kobject_create_and_add(buff, fs->mqs_kobj);
+ if (!fs->mqs_kobj) {
+ ret = -ENOMEM;
+ goto out_del;
+ }
+
+ ret = sysfs_create_group(fsvq->kobj, &virtio_fs_vq_attr_group);
+ if (ret) {
+ kobject_put(fsvq->kobj);
+ goto out_del;
+ }
+ }
+
+ return 0;
+
+out_del:
+ for (j = 0; j < i; j++) {
+ fsvq = &fs->vqs[j];
+ kobject_put(fsvq->kobj);
+ }
+ return ret;
+}
+
/* Add a new instance to the list or return -EEXIST if tag name exists*/
static int virtio_fs_add_instance(struct virtio_device *vdev,
struct virtio_fs *fs)
*/
fs->kobj.kset = virtio_fs_kset;
ret = kobject_add(&fs->kobj, NULL, "%d", vdev->index);
- if (ret < 0) {
- mutex_unlock(&virtio_fs_mutex);
- return ret;
+ if (ret < 0)
+ goto out_unlock;
+
+ fs->mqs_kobj = kobject_create_and_add("mqs", &fs->kobj);
+ if (!fs->mqs_kobj) {
+ ret = -ENOMEM;
+ goto out_del;
}
ret = sysfs_create_link(&fs->kobj, &vdev->dev.kobj, "device");
- if (ret < 0) {
- kobject_del(&fs->kobj);
- mutex_unlock(&virtio_fs_mutex);
- return ret;
- }
+ if (ret < 0)
+ goto out_put;
+
+ ret = virtio_fs_add_queues_sysfs(fs);
+ if (ret)
+ goto out_remove;
list_add_tail(&fs->list, &virtio_fs_instances);
kobject_uevent(&fs->kobj, KOBJ_ADD);
return 0;
+
+out_remove:
+ sysfs_remove_link(&fs->kobj, "device");
+out_put:
+ kobject_put(fs->mqs_kobj);
+out_del:
+ kobject_del(&fs->kobj);
+out_unlock:
+ mutex_unlock(&virtio_fs_mutex);
+ return ret;
}
/* Return the virtio_fs with a given tag, or NULL */
mutex_lock(&virtio_fs_mutex);
/* This device is going away. No one should get new reference */
list_del_init(&fs->list);
+ virtio_fs_delete_queues_sysfs(fs);
sysfs_remove_link(&fs->kobj, "device");
+ kobject_put(fs->mqs_kobj);
kobject_del(&fs->kobj);
virtio_fs_stop_all_queues(fs);
virtio_fs_drain_all_queues_locked(fs);