[PATCH 03/11] btrfs: refactor btrfs_sysfs_remove_devices_dir

Anand Jain
2020-08-30T14:43:15Z

Similar to btrfs_sysfs_add_devices_dir() refactor, refactor
btrfs_sysfs_remove_devices_dir() so that we don't have to use the 2nd
argument to indicate whether to free all devices or just one device. So
this patch also adds a bit of cleanups and return value is dropped to
void.

Signed-off-by: Anand Jain <anand.jain@oracle.com>
---
fs/btrfs/dev-replace.c | 2 +-
fs/btrfs/sysfs.c | 18 +++++-------------
fs/btrfs/sysfs.h | 4 ++--
fs/btrfs/volumes.c | 8 ++++----
4 files changed, 12 insertions(+), 20 deletions(-)

diff --git a/fs/btrfs/dev-replace.c b/fs/btrfs/dev-replace.c
index 979b40754cb4..a7b1ad4e5706 100644
--- a/fs/btrfs/dev-replace.c
+++ b/fs/btrfs/dev-replace.c
@@ -743,7 +743,7 @@ static int btrfs_dev_replace_finishing(struct btrfs_fs_info *fs_info,
mutex_unlock(&fs_info->fs_devices->device_list_mutex);

/* replace the sysfs entry */
- btrfs_sysfs_remove_devices_dir(fs_info->fs_devices, src_device);
+ btrfs_sysfs_remove_device(src_device);
btrfs_sysfs_update_devid(tgt_device);
if (test_bit(BTRFS_DEV_STATE_WRITEABLE, &src_device->dev_state))
btrfs_scratch_superblocks(fs_info, src_device->bdev,
diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c
index afc2e2ab4d27..69e5b57a33b4 100644
--- a/fs/btrfs/sysfs.c
+++ b/fs/btrfs/sysfs.c
@@ -962,7 +962,7 @@ void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info)
addrm_unknown_feature_attrs(fs_info, false);
sysfs_remove_group(fsid_kobj, &btrfs_feature_attr_group);
sysfs_remove_files(fsid_kobj, btrfs_attrs);
- btrfs_sysfs_remove_devices_dir(fs_info->fs_devices, NULL);
+ btrfs_sysfs_remove_fs_devices(fs_info->fs_devices);
}

static const char * const btrfs_feature_set_names[FEAT_MAX] = {
@@ -1149,7 +1149,7 @@ int btrfs_sysfs_add_space_info_type(struct btrfs_fs_info *fs_info,
return 0;
}

-static void btrfs_sysfs_remove_device(struct btrfs_device *device)
+void btrfs_sysfs_remove_device(struct btrfs_device *device)
{
struct hd_struct *disk;
struct kobject *disk_kobj;
@@ -1174,17 +1174,11 @@ static void btrfs_sysfs_remove_device(struct btrfs_device *device)
wait_for_completion(&device->kobj_unregister);
}

-/* when 2nd argument device is NULL, it removes all devices link */
-int btrfs_sysfs_remove_devices_dir(struct btrfs_fs_devices *fs_devices,
- struct btrfs_device *device)
+void btrfs_sysfs_remove_fs_devices(struct btrfs_fs_devices *fs_devices)
{
+ struct btrfs_device *device;
struct btrfs_fs_devices *seed_fs_devices;

- if (device) {
- btrfs_sysfs_remove_device(device);
- return 0;
- }
-
list_for_each_entry(device, &fs_devices->devices, dev_list)
btrfs_sysfs_remove_device(device);

@@ -1192,8 +1186,6 @@ int btrfs_sysfs_remove_devices_dir(struct btrfs_fs_devices *fs_devices,
list_for_each_entry(device, &seed_fs_devices->devices, dev_list)
btrfs_sysfs_remove_device(device);
}
-
- return 0;
}

static ssize_t btrfs_devinfo_in_fs_metadata_show(struct kobject *kobj,
@@ -1441,7 +1433,7 @@ int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info)

error = sysfs_create_files(fsid_kobj, btrfs_attrs);
if (error) {
- btrfs_sysfs_remove_devices_dir(fs_devs, NULL);
+ btrfs_sysfs_remove_fs_devices(fs_devs);
return error;
}

diff --git a/fs/btrfs/sysfs.h b/fs/btrfs/sysfs.h
index 2a3a44aa0709..085e34b81fba 100644
--- a/fs/btrfs/sysfs.h
+++ b/fs/btrfs/sysfs.h
@@ -16,8 +16,8 @@ char *btrfs_printable_features(enum btrfs_feature_set set, u64 flags);
const char *btrfs_feature_set_name(enum btrfs_feature_set set);
int btrfs_sysfs_add_device(struct btrfs_device *device);
int btrfs_sysfs_add_fs_devices(struct btrfs_fs_devices *fs_devices);
-int btrfs_sysfs_remove_devices_dir(struct btrfs_fs_devices *fs_devices,
- struct btrfs_device *one_device);
+void btrfs_sysfs_remove_device(struct btrfs_device *device);
+void btrfs_sysfs_remove_fs_devices(struct btrfs_fs_devices *fs_devices);
int btrfs_sysfs_add_fsid(struct btrfs_fs_devices *fs_devs);
void btrfs_sysfs_remove_fsid(struct btrfs_fs_devices *fs_devs);
void btrfs_sysfs_update_sprout_fsid(struct btrfs_fs_devices *fs_devices);
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 8952f7031f4b..9921b43ef839 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -2040,7 +2040,7 @@ void btrfs_scratch_superblocks(struct btrfs_fs_info *fs_info,
}

int btrfs_rm_device(struct btrfs_fs_info *fs_info, const char *device_path,
- u64 devid)
+ u64 devid)
{
struct btrfs_device *device;
struct btrfs_fs_devices *cur_devices;
@@ -2144,7 +2144,7 @@ int btrfs_rm_device(struct btrfs_fs_info *fs_info, const char *device_path,
if (device->bdev) {
cur_devices->open_devices--;
/* remove sysfs entry */
- btrfs_sysfs_remove_devices_dir(fs_devices, device);
+ btrfs_sysfs_remove_device(device);
}

num_devices = btrfs_super_num_devices(fs_info->super_copy) - 1;
@@ -2245,7 +2245,7 @@ void btrfs_destroy_dev_replace_tgtdev(struct btrfs_device *tgtdev)

mutex_lock(&fs_devices->device_list_mutex);

- btrfs_sysfs_remove_devices_dir(fs_devices, tgtdev);
+ btrfs_sysfs_remove_device(tgtdev);

if (tgtdev->bdev)
fs_devices->open_devices--;
@@ -2680,7 +2680,7 @@ int btrfs_init_new_device(struct btrfs_fs_info *fs_info, const char *device_path
return ret;

error_sysfs:
- btrfs_sysfs_remove_devices_dir(fs_devices, device);
+ btrfs_sysfs_remove_device(device);
mutex_lock(&fs_info->fs_devices->device_list_mutex);
mutex_lock(&fs_info->chunk_mutex);
list_del_rcu(&device->dev_list);
--
2.25.1