Kernel/linux-next
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git synced 2025-01-16 05:26:07 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

btrfs: sysfs: introduce global qgroup attribute group

Browse Source 
Although we already have info kobject for each qgroup, we don't have
global qgroup info attributes to show things like enabled or
inconsistent status flags.

Add this qgroups attribute groups, and the first member is qgroup_flags,
which is a read-only attribute to show human readable qgroup flags.

The path is:
  /sys/fs/btrfs/<uuid>/qgroups/enabled
  /sys/fs/btrfs/<uuid>/qgroups/inconsistent

The output is simple, just 1 or 0.

Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Qu Wenruo 2022-08-24 09:14:05 +08:00 committed by David Sterba
parent ac3c0d36a2
commit ed2e35d85d
1 changed files with 61 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

65
fs/btrfs/sysfs.c
View File

@ -2015,6 +2015,59 @@ failure:
return error;
}
static ssize_t qgroup_enabled_show(struct kobject *qgroups_kobj,
struct kobj_attribute *a,
char *buf)
{
struct btrfs_fs_info *fs_info = to_fs_info(qgroups_kobj->parent);
bool enabled;
spin_lock(&fs_info->qgroup_lock);
enabled = fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_ON;
spin_unlock(&fs_info->qgroup_lock);
return sysfs_emit(buf, "%d\n", enabled);
}
BTRFS_ATTR(qgroups, enabled, qgroup_enabled_show);
static ssize_t qgroup_inconsistent_show(struct kobject *qgroups_kobj,
struct kobj_attribute *a,
char *buf)
{
struct btrfs_fs_info *fs_info = to_fs_info(qgroups_kobj->parent);
bool inconsistent;
spin_lock(&fs_info->qgroup_lock);
inconsistent = (fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT);
spin_unlock(&fs_info->qgroup_lock);
return sysfs_emit(buf, "%d\n", inconsistent);
}
BTRFS_ATTR(qgroups, inconsistent, qgroup_inconsistent_show);
/*
* Qgroups global info
*
* Path: /sys/fs/btrfs/<uuid>/qgroups/
*/
static struct attribute *qgroups_attrs[] = {
BTRFS_ATTR_PTR(qgroups, enabled),
BTRFS_ATTR_PTR(qgroups, inconsistent),
NULL
};
ATTRIBUTE_GROUPS(qgroups);
static void qgroups_release(struct kobject *kobj)
{
kfree(kobj);
}
static struct kobj_type qgroups_ktype = {
.sysfs_ops = &kobj_sysfs_ops,
.default_groups = qgroups_groups,
.release = qgroups_release,
};
static inline struct btrfs_fs_info *qgroup_kobj_to_fs_info(struct kobject *kobj)
{
return to_fs_info(kobj->parent->parent);
@ -2140,11 +2193,15 @@ int btrfs_sysfs_add_qgroups(struct btrfs_fs_info *fs_info)
if (fs_info->qgroups_kobj)
return 0;
fs_info->qgroups_kobj = kobject_create_and_add("qgroups", fsid_kobj);
if (!fs_info->qgroups_kobj) {
ret = -ENOMEM;
fs_info->qgroups_kobj = kzalloc(sizeof(struct kobject), GFP_KERNEL);
if (!fs_info->qgroups_kobj)
return -ENOMEM;
ret = kobject_init_and_add(fs_info->qgroups_kobj, &qgroups_ktype,
fsid_kobj, "qgroups");
if (ret < 0)
goto out;
}
rbtree_postorder_for_each_entry_safe(qgroup, next,
&fs_info->qgroup_tree, node) {
ret = btrfs_sysfs_add_one_qgroup(fs_info, qgroup);