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Diffstat (limited to 'fs/btrfs/sysfs.c')
-rw-r--r--fs/btrfs/sysfs.c172
1 files changed, 121 insertions, 51 deletions
diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c
index d5d0717fd09a..699b54b3acaa 100644
--- a/fs/btrfs/sysfs.c
+++ b/fs/btrfs/sysfs.c
@@ -35,12 +35,12 @@
* qgroup_attrs /sys/fs/btrfs/<uuid>/qgroups/<level>_<qgroupid>
* space_info_attrs /sys/fs/btrfs/<uuid>/allocation/<bg-type>
* raid_attrs /sys/fs/btrfs/<uuid>/allocation/<bg-type>/<bg-profile>
+ * discard_attrs /sys/fs/btrfs/<uuid>/discard
*
* When built with BTRFS_CONFIG_DEBUG:
*
* btrfs_debug_feature_attrs /sys/fs/btrfs/debug
* btrfs_debug_mount_attrs /sys/fs/btrfs/<uuid>/debug
- * discard_debug_attrs /sys/fs/btrfs/<uuid>/debug/discard
*/
struct btrfs_feature_attr {
@@ -286,6 +286,7 @@ BTRFS_FEAT_ATTR_INCOMPAT(skinny_metadata, SKINNY_METADATA);
BTRFS_FEAT_ATTR_INCOMPAT(no_holes, NO_HOLES);
BTRFS_FEAT_ATTR_INCOMPAT(metadata_uuid, METADATA_UUID);
BTRFS_FEAT_ATTR_COMPAT_RO(free_space_tree, FREE_SPACE_TREE);
+BTRFS_FEAT_ATTR_COMPAT_RO(block_group_tree, BLOCK_GROUP_TREE);
BTRFS_FEAT_ATTR_INCOMPAT(raid1c34, RAID1C34);
#ifdef CONFIG_BLK_DEV_ZONED
BTRFS_FEAT_ATTR_INCOMPAT(zoned, ZONED);
@@ -317,6 +318,7 @@ static struct attribute *btrfs_supported_feature_attrs[] = {
BTRFS_FEAT_ATTR_PTR(metadata_uuid),
BTRFS_FEAT_ATTR_PTR(free_space_tree),
BTRFS_FEAT_ATTR_PTR(raid1c34),
+ BTRFS_FEAT_ATTR_PTR(block_group_tree),
#ifdef CONFIG_BLK_DEV_ZONED
BTRFS_FEAT_ATTR_PTR(zoned),
#endif
@@ -429,12 +431,10 @@ static const struct attribute_group btrfs_static_feature_attr_group = {
.attrs = btrfs_supported_static_feature_attrs,
};
-#ifdef CONFIG_BTRFS_DEBUG
-
/*
* Discard statistics and tunables
*/
-#define discard_to_fs_info(_kobj) to_fs_info((_kobj)->parent->parent)
+#define discard_to_fs_info(_kobj) to_fs_info(get_btrfs_kobj(_kobj))
static ssize_t btrfs_discardable_bytes_show(struct kobject *kobj,
struct kobj_attribute *a,
@@ -583,11 +583,11 @@ BTRFS_ATTR_RW(discard, max_discard_size, btrfs_discard_max_discard_size_show,
btrfs_discard_max_discard_size_store);
/*
- * Per-filesystem debugging of discard (when mounted with discard=async).
+ * Per-filesystem stats for discard (when mounted with discard=async).
*
- * Path: /sys/fs/btrfs/<uuid>/debug/discard/
+ * Path: /sys/fs/btrfs/<uuid>/discard/
*/
-static const struct attribute *discard_debug_attrs[] = {
+static const struct attribute *discard_attrs[] = {
BTRFS_ATTR_PTR(discard, discardable_bytes),
BTRFS_ATTR_PTR(discard, discardable_extents),
BTRFS_ATTR_PTR(discard, discard_bitmap_bytes),
@@ -599,6 +599,8 @@ static const struct attribute *discard_debug_attrs[] = {
NULL,
};
+#ifdef CONFIG_BTRFS_DEBUG
+
/*
* Per-filesystem runtime debugging exported via sysfs.
*
@@ -837,11 +839,8 @@ static ssize_t btrfs_sinfo_bg_reclaim_threshold_show(struct kobject *kobj,
char *buf)
{
struct btrfs_space_info *space_info = to_space_info(kobj);
- ssize_t ret;
- ret = sysfs_emit(buf, "%d\n", READ_ONCE(space_info->bg_reclaim_threshold));
-
- return ret;
+ return sysfs_emit(buf, "%d\n", READ_ONCE(space_info->bg_reclaim_threshold));
}
static ssize_t btrfs_sinfo_bg_reclaim_threshold_store(struct kobject *kobj,
@@ -1150,25 +1149,6 @@ static ssize_t btrfs_generation_show(struct kobject *kobj,
}
BTRFS_ATTR(, generation, btrfs_generation_show);
-/*
- * Look for an exact string @string in @buffer with possible leading or
- * trailing whitespace
- */
-static bool strmatch(const char *buffer, const char *string)
-{
- const size_t len = strlen(string);
-
- /* Skip leading whitespace */
- buffer = skip_spaces(buffer);
-
- /* Match entire string, check if the rest is whitespace or empty */
- if (strncmp(string, buffer, len) == 0 &&
- strlen(skip_spaces(buffer + len)) == 0)
- return true;
-
- return false;
-}
-
static const char * const btrfs_read_policy_name[] = { "pid" };
static ssize_t btrfs_read_policy_show(struct kobject *kobj,
@@ -1202,7 +1182,7 @@ static ssize_t btrfs_read_policy_store(struct kobject *kobj,
int i;
for (i = 0; i < BTRFS_NR_READ_POLICY; i++) {
- if (strmatch(buf, btrfs_read_policy_name[i])) {
+ if (sysfs_streq(buf, btrfs_read_policy_name[i])) {
if (i != fs_devices->read_policy) {
fs_devices->read_policy = i;
btrfs_info(fs_devices->fs_info,
@@ -1222,11 +1202,8 @@ static ssize_t btrfs_bg_reclaim_threshold_show(struct kobject *kobj,
char *buf)
{
struct btrfs_fs_info *fs_info = to_fs_info(kobj);
- ssize_t ret;
- ret = sysfs_emit(buf, "%d\n", READ_ONCE(fs_info->bg_reclaim_threshold));
-
- return ret;
+ return sysfs_emit(buf, "%d\n", READ_ONCE(fs_info->bg_reclaim_threshold));
}
static ssize_t btrfs_bg_reclaim_threshold_store(struct kobject *kobj,
@@ -1427,13 +1404,12 @@ void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info)
kobject_del(fs_info->space_info_kobj);
kobject_put(fs_info->space_info_kobj);
}
-#ifdef CONFIG_BTRFS_DEBUG
- if (fs_info->discard_debug_kobj) {
- sysfs_remove_files(fs_info->discard_debug_kobj,
- discard_debug_attrs);
- kobject_del(fs_info->discard_debug_kobj);
- kobject_put(fs_info->discard_debug_kobj);
+ if (fs_info->discard_kobj) {
+ sysfs_remove_files(fs_info->discard_kobj, discard_attrs);
+ kobject_del(fs_info->discard_kobj);
+ kobject_put(fs_info->discard_kobj);
}
+#ifdef CONFIG_BTRFS_DEBUG
if (fs_info->debug_kobj) {
sysfs_remove_files(fs_info->debug_kobj, btrfs_debug_mount_attrs);
kobject_del(fs_info->debug_kobj);
@@ -2001,20 +1977,18 @@ int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info)
error = sysfs_create_files(fs_info->debug_kobj, btrfs_debug_mount_attrs);
if (error)
goto failure;
+#endif
/* Discard directory */
- fs_info->discard_debug_kobj = kobject_create_and_add("discard",
- fs_info->debug_kobj);
- if (!fs_info->discard_debug_kobj) {
+ fs_info->discard_kobj = kobject_create_and_add("discard", fsid_kobj);
+ if (!fs_info->discard_kobj) {
error = -ENOMEM;
goto failure;
}
- error = sysfs_create_files(fs_info->discard_debug_kobj,
- discard_debug_attrs);
+ error = sysfs_create_files(fs_info->discard_kobj, discard_attrs);
if (error)
goto failure;
-#endif
error = addrm_unknown_feature_attrs(fs_info, true);
if (error)
@@ -2041,6 +2015,98 @@ 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);
+
+static ssize_t qgroup_drop_subtree_thres_show(struct kobject *qgroups_kobj,
+ struct kobj_attribute *a,
+ char *buf)
+{
+ struct btrfs_fs_info *fs_info = to_fs_info(qgroups_kobj->parent);
+ u8 result;
+
+ spin_lock(&fs_info->qgroup_lock);
+ result = fs_info->qgroup_drop_subtree_thres;
+ spin_unlock(&fs_info->qgroup_lock);
+
+ return sysfs_emit(buf, "%d\n", result);
+}
+
+static ssize_t qgroup_drop_subtree_thres_store(struct kobject *qgroups_kobj,
+ struct kobj_attribute *a,
+ const char *buf, size_t len)
+{
+ struct btrfs_fs_info *fs_info = to_fs_info(qgroups_kobj->parent);
+ u8 new_thres;
+ int ret;
+
+ ret = kstrtou8(buf, 10, &new_thres);
+ if (ret)
+ return -EINVAL;
+
+ if (new_thres > BTRFS_MAX_LEVEL)
+ return -EINVAL;
+
+ spin_lock(&fs_info->qgroup_lock);
+ fs_info->qgroup_drop_subtree_thres = new_thres;
+ spin_unlock(&fs_info->qgroup_lock);
+
+ return len;
+}
+BTRFS_ATTR_RW(qgroups, drop_subtree_threshold, qgroup_drop_subtree_thres_show,
+ qgroup_drop_subtree_thres_store);
+
+/*
+ * Qgroups global info
+ *
+ * Path: /sys/fs/btrfs/<uuid>/qgroups/
+ */
+static struct attribute *qgroups_attrs[] = {
+ BTRFS_ATTR_PTR(qgroups, enabled),
+ BTRFS_ATTR_PTR(qgroups, inconsistent),
+ BTRFS_ATTR_PTR(qgroups, drop_subtree_threshold),
+ 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);
@@ -2166,11 +2232,15 @@ 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);
generated by cgit v1.2.3 (git 2.39.0) at 2025-01-23 15:29:16 +0300