Merge tag 'core-rcu-2021-04-28' of git://git.kernel.org/pub/scm/linux/kernel/git...

[linux-2.6-microblaze.git] / fs / btrfs / sysfs.c

diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c
index 6eb1c50..436ac7b 100644 (file)
--- a/fs/btrfs/sysfs.c
+++ b/fs/btrfs/sysfs.c
@@ -360,11 +360,26 @@ static ssize_t supported_rescue_options_show(struct kobject *kobj,
 BTRFS_ATTR(static_feature, supported_rescue_options,
           supported_rescue_options_show);
 
+static ssize_t supported_sectorsizes_show(struct kobject *kobj,
+                                         struct kobj_attribute *a,
+                                         char *buf)
+{
+       ssize_t ret = 0;
+
+       /* Only sectorsize == PAGE_SIZE is now supported */
+       ret += scnprintf(buf + ret, PAGE_SIZE - ret, "%lu\n", PAGE_SIZE);
+
+       return ret;
+}
+BTRFS_ATTR(static_feature, supported_sectorsizes,
+          supported_sectorsizes_show);
+
 static struct attribute *btrfs_supported_static_feature_attrs[] = {
        BTRFS_ATTR_PTR(static_feature, rmdir_subvol),
        BTRFS_ATTR_PTR(static_feature, supported_checksums),
        BTRFS_ATTR_PTR(static_feature, send_stream_version),
        BTRFS_ATTR_PTR(static_feature, supported_rescue_options),
+       BTRFS_ATTR_PTR(static_feature, supported_sectorsizes),
        NULL
 };
 
@@ -965,6 +980,40 @@ static ssize_t btrfs_read_policy_store(struct kobject *kobj,
 }
 BTRFS_ATTR_RW(, read_policy, btrfs_read_policy_show, btrfs_read_policy_store);
 
+static ssize_t btrfs_bg_reclaim_threshold_show(struct kobject *kobj,
+                                              struct kobj_attribute *a,
+                                              char *buf)
+{
+       struct btrfs_fs_info *fs_info = to_fs_info(kobj);
+       ssize_t ret;
+
+       ret = scnprintf(buf, PAGE_SIZE, "%d\n", fs_info->bg_reclaim_threshold);
+
+       return ret;
+}
+
+static ssize_t btrfs_bg_reclaim_threshold_store(struct kobject *kobj,
+                                               struct kobj_attribute *a,
+                                               const char *buf, size_t len)
+{
+       struct btrfs_fs_info *fs_info = to_fs_info(kobj);
+       int thresh;
+       int ret;
+
+       ret = kstrtoint(buf, 10, &thresh);
+       if (ret)
+               return ret;
+
+       if (thresh <= 50 || thresh > 100)
+               return -EINVAL;
+
+       fs_info->bg_reclaim_threshold = thresh;
+
+       return len;
+}
+BTRFS_ATTR_RW(, bg_reclaim_threshold, btrfs_bg_reclaim_threshold_show,
+             btrfs_bg_reclaim_threshold_store);
+
 static const struct attribute *btrfs_attrs[] = {
        BTRFS_ATTR_PTR(, label),
        BTRFS_ATTR_PTR(, nodesize),
@@ -976,6 +1025,7 @@ static const struct attribute *btrfs_attrs[] = {
        BTRFS_ATTR_PTR(, exclusive_operation),
        BTRFS_ATTR_PTR(, generation),
        BTRFS_ATTR_PTR(, read_policy),
+       BTRFS_ATTR_PTR(, bg_reclaim_threshold),
        NULL,
 };