#include "locking.h"
#include "free-space-cache.h"
#include "math.h"
+#include "sysfs.h"
#undef SCRAMBLE_DELAYED_REFS
return readonly;
}
+static const char *alloc_name(u64 flags)
+{
+ switch (flags) {
+ case BTRFS_BLOCK_GROUP_METADATA|BTRFS_BLOCK_GROUP_DATA:
+ return "mixed";
+ case BTRFS_BLOCK_GROUP_METADATA:
+ return "metadata";
+ case BTRFS_BLOCK_GROUP_DATA:
+ return "data";
+ case BTRFS_BLOCK_GROUP_SYSTEM:
+ return "system";
+ default:
+ WARN_ON(1);
+ return "invalid-combination";
+ };
+}
+
static int update_space_info(struct btrfs_fs_info *info, u64 flags,
u64 total_bytes, u64 bytes_used,
struct btrfs_space_info **space_info)
found->chunk_alloc = 0;
found->flush = 0;
init_waitqueue_head(&found->wait);
+
+ ret = kobject_init_and_add(&found->kobj, &space_info_ktype,
+ info->space_info_kobj, "%s",
+ alloc_name(found->flags));
+ if (ret) {
+ kfree(found);
+ return ret;
+ }
+
*space_info = found;
list_add_rcu(&found->list, &info->space_info);
if (flags & BTRFS_BLOCK_GROUP_DATA)
info->data_sinfo = found;
- return 0;
+
+ return ret;
}
static void set_avail_alloc_bits(struct btrfs_fs_info *fs_info, u64 flags)
return BTRFS_RAID_SINGLE; /* BTRFS_BLOCK_GROUP_SINGLE */
}
-static int get_block_group_index(struct btrfs_block_group_cache *cache)
+int get_block_group_index(struct btrfs_block_group_cache *cache)
{
return __get_raid_index(cache->flags);
}
+static const char *btrfs_raid_type_names[BTRFS_NR_RAID_TYPES] = {
+ [BTRFS_RAID_RAID10] = "raid10",
+ [BTRFS_RAID_RAID1] = "raid1",
+ [BTRFS_RAID_DUP] = "dup",
+ [BTRFS_RAID_RAID0] = "raid0",
+ [BTRFS_RAID_SINGLE] = "single",
+ [BTRFS_RAID_RAID5] = "raid5",
+ [BTRFS_RAID_RAID6] = "raid6",
+};
+
+const char *get_raid_name(enum btrfs_raid_types type)
+{
+ if (type >= BTRFS_NR_RAID_TYPES)
+ return NULL;
+
+ return btrfs_raid_type_names[type];
+}
+
enum btrfs_loop_type {
LOOP_CACHING_NOWAIT = 0,
LOOP_CACHING_WAIT = 1,
release_global_block_rsv(info);
while (!list_empty(&info->space_info)) {
+ int i;
+
space_info = list_entry(info->space_info.next,
struct btrfs_space_info,
list);
dump_space_info(space_info, 0, 0);
}
}
- percpu_counter_destroy(&space_info->total_bytes_pinned);
list_del(&space_info->list);
- kfree(space_info);
+ for (i = 0; i < BTRFS_NR_RAID_TYPES; i++) {
+ struct kobject *kobj;
+ kobj = &space_info->block_group_kobjs[i];
+ if (kobj->parent) {
+ kobject_del(kobj);
+ kobject_put(kobj);
+ }
+ }
+ kobject_del(&space_info->kobj);
+ kobject_put(&space_info->kobj);
}
return 0;
}
int index = get_block_group_index(cache);
down_write(&space_info->groups_sem);
+ if (list_empty(&space_info->block_groups[index])) {
+ struct kobject *kobj = &space_info->block_group_kobjs[index];
+ int ret;
+
+ kobject_get(&space_info->kobj); /* put in release */
+ ret = kobject_init_and_add(kobj, &btrfs_raid_ktype,
+ &space_info->kobj,
+ get_raid_name(index));
+ if (ret) {
+ pr_warn("btrfs: failed to add kobject for block cache. ignoring.\n");
+ kobject_put(&space_info->kobj);
+ }
+ }
list_add_tail(&cache->list, &space_info->block_groups[index]);
up_write(&space_info->groups_sem);
}
* are still on the list after taking the semaphore
*/
list_del_init(&block_group->list);
- if (list_empty(&block_group->space_info->block_groups[index]))
+ if (list_empty(&block_group->space_info->block_groups[index])) {
+ kobject_del(&block_group->space_info->block_group_kobjs[index]);
+ kobject_put(&block_group->space_info->block_group_kobjs[index]);
clear_avail_alloc_bits(root->fs_info, block_group->flags);
+ }
up_write(&block_group->space_info->groups_sem);
if (block_group->cached == BTRFS_CACHE_STARTED)
.attrs = btrfs_supported_feature_attrs,
};
+static ssize_t btrfs_show_u64(u64 *value_ptr, spinlock_t *lock, char *buf)
+{
+ u64 val;
+ if (lock)
+ spin_lock(lock);
+ val = *value_ptr;
+ if (lock)
+ spin_unlock(lock);
+ return snprintf(buf, PAGE_SIZE, "%llu\n", val);
+}
+
+static ssize_t global_rsv_size_show(struct kobject *kobj,
+ struct kobj_attribute *ka, char *buf)
+{
+ struct btrfs_fs_info *fs_info = to_fs_info(kobj->parent);
+ struct btrfs_block_rsv *block_rsv = &fs_info->global_block_rsv;
+ return btrfs_show_u64(&block_rsv->size, &block_rsv->lock, buf);
+}
+BTRFS_ATTR(global_rsv_size, 0444, global_rsv_size_show);
+
+static ssize_t global_rsv_reserved_show(struct kobject *kobj,
+ struct kobj_attribute *a, char *buf)
+{
+ struct btrfs_fs_info *fs_info = to_fs_info(kobj->parent);
+ struct btrfs_block_rsv *block_rsv = &fs_info->global_block_rsv;
+ return btrfs_show_u64(&block_rsv->reserved, &block_rsv->lock, buf);
+}
+BTRFS_ATTR(global_rsv_reserved, 0444, global_rsv_reserved_show);
+
+#define to_space_info(_kobj) container_of(_kobj, struct btrfs_space_info, kobj)
+
+static ssize_t raid_bytes_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *buf);
+BTRFS_RAID_ATTR(total_bytes, raid_bytes_show);
+BTRFS_RAID_ATTR(used_bytes, raid_bytes_show);
+
+static ssize_t raid_bytes_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *buf)
+
+{
+ struct btrfs_space_info *sinfo = to_space_info(kobj->parent);
+ struct btrfs_block_group_cache *block_group;
+ int index = kobj - sinfo->block_group_kobjs;
+ u64 val = 0;
+
+ down_read(&sinfo->groups_sem);
+ list_for_each_entry(block_group, &sinfo->block_groups[index], list) {
+ if (&attr->attr == BTRFS_RAID_ATTR_PTR(total_bytes))
+ val += block_group->key.offset;
+ else
+ val += btrfs_block_group_used(&block_group->item);
+ }
+ up_read(&sinfo->groups_sem);
+ return snprintf(buf, PAGE_SIZE, "%llu\n", val);
+}
+
+static struct attribute *raid_attributes[] = {
+ BTRFS_RAID_ATTR_PTR(total_bytes),
+ BTRFS_RAID_ATTR_PTR(used_bytes),
+ NULL
+};
+
+static void release_raid_kobj(struct kobject *kobj)
+{
+ kobject_put(kobj->parent);
+}
+
+struct kobj_type btrfs_raid_ktype = {
+ .sysfs_ops = &kobj_sysfs_ops,
+ .release = release_raid_kobj,
+ .default_attrs = raid_attributes,
+};
+
+#define SPACE_INFO_ATTR(field) \
+static ssize_t btrfs_space_info_show_##field(struct kobject *kobj, \
+ struct kobj_attribute *a, \
+ char *buf) \
+{ \
+ struct btrfs_space_info *sinfo = to_space_info(kobj); \
+ return btrfs_show_u64(&sinfo->field, &sinfo->lock, buf); \
+} \
+BTRFS_ATTR(field, 0444, btrfs_space_info_show_##field)
+
+static ssize_t btrfs_space_info_show_total_bytes_pinned(struct kobject *kobj,
+ struct kobj_attribute *a,
+ char *buf)
+{
+ struct btrfs_space_info *sinfo = to_space_info(kobj);
+ s64 val = percpu_counter_sum(&sinfo->total_bytes_pinned);
+ return snprintf(buf, PAGE_SIZE, "%lld\n", val);
+}
+
+SPACE_INFO_ATTR(flags);
+SPACE_INFO_ATTR(total_bytes);
+SPACE_INFO_ATTR(bytes_used);
+SPACE_INFO_ATTR(bytes_pinned);
+SPACE_INFO_ATTR(bytes_reserved);
+SPACE_INFO_ATTR(bytes_may_use);
+SPACE_INFO_ATTR(disk_used);
+SPACE_INFO_ATTR(disk_total);
+BTRFS_ATTR(total_bytes_pinned, 0444, btrfs_space_info_show_total_bytes_pinned);
+
+static struct attribute *space_info_attrs[] = {
+ BTRFS_ATTR_PTR(flags),
+ BTRFS_ATTR_PTR(total_bytes),
+ BTRFS_ATTR_PTR(bytes_used),
+ BTRFS_ATTR_PTR(bytes_pinned),
+ BTRFS_ATTR_PTR(bytes_reserved),
+ BTRFS_ATTR_PTR(bytes_may_use),
+ BTRFS_ATTR_PTR(disk_used),
+ BTRFS_ATTR_PTR(disk_total),
+ BTRFS_ATTR_PTR(total_bytes_pinned),
+ NULL,
+};
+
+static void space_info_release(struct kobject *kobj)
+{
+ struct btrfs_space_info *sinfo = to_space_info(kobj);
+ percpu_counter_destroy(&sinfo->total_bytes_pinned);
+ kfree(sinfo);
+}
+
+struct kobj_type space_info_ktype = {
+ .sysfs_ops = &kobj_sysfs_ops,
+ .release = space_info_release,
+ .default_attrs = space_info_attrs,
+};
+
+static const struct attribute *allocation_attrs[] = {
+ BTRFS_ATTR_PTR(global_rsv_reserved),
+ BTRFS_ATTR_PTR(global_rsv_size),
+ NULL,
+};
+
static void btrfs_release_super_kobj(struct kobject *kobj)
{
struct btrfs_fs_info *fs_info = to_fs_info(kobj);
void btrfs_sysfs_remove_one(struct btrfs_fs_info *fs_info)
{
+ sysfs_remove_files(fs_info->space_info_kobj, allocation_attrs);
+ kobject_del(fs_info->space_info_kobj);
+ kobject_put(fs_info->space_info_kobj);
kobject_del(&fs_info->super_kobj);
kobject_put(&fs_info->super_kobj);
wait_for_completion(&fs_info->kobj_unregister);
if (error)
goto failure;
+ fs_info->space_info_kobj = kobject_create_and_add("allocation",
+ &fs_info->super_kobj);
+ if (!fs_info->space_info_kobj) {
+ error = -ENOMEM;
+ goto failure;
+ }
+
+ error = sysfs_create_files(fs_info->space_info_kobj, allocation_attrs);
+ if (error)
+ goto failure;
+
return 0;
failure:
btrfs_sysfs_remove_one(fs_info);
projects / platform / kernel / linux-rpi3.git / commitdiff