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btrfs: split and refactor btrfs_sysfs_remove_devices_dir 

Similar to btrfs_sysfs_add_devices_dir()'s refactoring, split
btrfs_sysfs_remove_devices_dir() so that we don't have to use the device
argument to indicate whether to free all devices or just one device.

Export btrfs_sysfs_remove_device() as device operations outside of
sysfs.c now calls this instead of btrfs_sysfs_remove_devices_dir().

btrfs_sysfs_remove_devices_dir() is renamed to
btrfs_sysfs_remove_fs_devices() to suite its new role.

Now, no one outside of sysfs.c calls btrfs_sysfs_remove_fs_devices()
so it is redeclared s static. And the same function had to be moved
before its first caller.

Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Anand Jain 2020-09-05 01:34:27 +08:00 committed by David Sterba
parent cd36da2e7e
commit 53f8a74cbe
4 changed files with 17 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
fs/btrfs/dev-replace.c
View File

@ -781,7 +781,7 @@ error:
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,

27
fs/btrfs/sysfs.c
View File

@ -972,6 +972,14 @@ void btrfs_sysfs_remove_fsid(struct btrfs_fs_devices *fs_devs)
}
}
static void btrfs_sysfs_remove_fs_devices(struct btrfs_fs_devices *fs_devices)
{
struct btrfs_device *device;
list_for_each_entry(device, &fs_devices->devices, dev_list)
btrfs_sysfs_remove_device(device);
}
void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info)
{
struct kobject *fsid_kobj = &fs_info->fs_devices->fsid_kobj;
@ -999,7 +1007,7 @@ 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] = {
@ -1186,7 +1194,7 @@ 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;
@ -1212,19 +1220,6 @@ static void btrfs_sysfs_remove_device(struct btrfs_device *device)
}
}
/* When @device is NULL, remove all devices link */
void btrfs_sysfs_remove_devices_dir(struct btrfs_fs_devices *fs_devices,
struct btrfs_device *device)
{
if (device) {
btrfs_sysfs_remove_device(device);
return;
}
list_for_each_entry(device, &fs_devices->devices, dev_list)
btrfs_sysfs_remove_device(device);
}
static ssize_t btrfs_devinfo_in_fs_metadata_show(struct kobject *kobj,
struct kobj_attribute *a,
char *buf)
@ -1459,7 +1454,7 @@ 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;
}

3
fs/btrfs/sysfs.h
View File

@ -15,8 +15,7 @@ enum btrfs_feature_set {
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);
void btrfs_sysfs_remove_devices_dir(struct btrfs_fs_devices *fs_devices,
struct btrfs_device *device);
void btrfs_sysfs_remove_device(struct btrfs_device *device);
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);

6
fs/btrfs/volumes.c
View File

@ -2145,7 +2145,7 @@ 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;
@ -2246,7 +2246,7 @@ 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--;
@ -2682,7 +2682,7 @@ 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);