Commit c4989c2f authored by Nikolay Borisov's avatar Nikolay Borisov Committed by David Sterba
Browse files

btrfs: simplify setting/clearing fs_info to btrfs_fs_devices 



It makes no sense to have sysfs-related routines be responsible for
properly initialising the fs_info pointer of struct btrfs_fs_device.
Instead this can be streamlined by making it the responsibility of
btrfs_init_devices_late to initialize it. That function already
initializes fs_info of every individual device in btrfs_fs_devices.

As far as clearing it is concerned it makes sense to move it to
close_fs_devices. That function is only called when struct
btrfs_fs_devices is no longer in use - either for holding seeds or
main devices for a mounted filesystem.

Reviewed-by: default avatarJosef Bacik <josef@toxicpanda.com>
Reviewed-by: default avatarAnand Jain <anand.jain@oracle.com>
Signed-off-by: default avatarNikolay Borisov <nborisov@suse.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent 54eed6ae

fs/btrfs/sysfs.c

+0 −4
Original line number Diff line number Diff line
@@ -939,8 +939,6 @@ void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info) 
{

	struct kobject *fsid_kobj = &fs_info->fs_devices->fsid_kobj;



	btrfs_reset_fs_info_ptr(fs_info);



	sysfs_remove_link(fsid_kobj, "bdi");



	if (fs_info->space_info_kobj) {
@@ -1404,8 +1402,6 @@ int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info) 
	struct btrfs_fs_devices *fs_devs = fs_info->fs_devices;

	struct kobject *fsid_kobj = &fs_devs->fsid_kobj;



	btrfs_set_fs_info_ptr(fs_info);



	error = btrfs_sysfs_add_devices_dir(fs_devs, NULL);

	if (error)

		return error;

fs/btrfs/volumes.c

+2 −18
Original line number Diff line number Diff line
@@ -1173,6 +1173,7 @@ static void close_fs_devices(struct btrfs_fs_devices *fs_devices) 
	WARN_ON(fs_devices->rw_devices);

	fs_devices->opened = 0;

	fs_devices->seeding = false;

	fs_devices->fs_info = NULL;

}



void btrfs_close_devices(struct btrfs_fs_devices *fs_devices)
@@ -7201,6 +7202,7 @@ void btrfs_init_devices_late(struct btrfs_fs_info *fs_info) 
			device->fs_info = fs_info;

		mutex_unlock(&fs_devices->device_list_mutex);



		fs_devices->fs_info = fs_info;

		fs_devices = fs_devices->seed;

	}

}
@@ -7499,24 +7501,6 @@ void btrfs_commit_device_sizes(struct btrfs_transaction *trans) 
	mutex_unlock(&trans->fs_info->chunk_mutex);

}



void btrfs_set_fs_info_ptr(struct btrfs_fs_info *fs_info)

{

	struct btrfs_fs_devices *fs_devices = fs_info->fs_devices;

	while (fs_devices) {

		fs_devices->fs_info = fs_info;

		fs_devices = fs_devices->seed;

	}

}



void btrfs_reset_fs_info_ptr(struct btrfs_fs_info *fs_info)

{

	struct btrfs_fs_devices *fs_devices = fs_info->fs_devices;

	while (fs_devices) {

		fs_devices->fs_info = NULL;

		fs_devices = fs_devices->seed;

	}

}



/*

 * Multiplicity factor for simple profiles: DUP, RAID1-like and RAID10.

 */

fs/btrfs/volumes.h

+0 −2
Original line number Diff line number Diff line
@@ -569,8 +569,6 @@ static inline enum btrfs_raid_types btrfs_bg_flags_to_raid_index(u64 flags) 
void btrfs_commit_device_sizes(struct btrfs_transaction *trans);



struct list_head * __attribute_const__ btrfs_get_fs_uuids(void);

void btrfs_set_fs_info_ptr(struct btrfs_fs_info *fs_info);

void btrfs_reset_fs_info_ptr(struct btrfs_fs_info *fs_info);

bool btrfs_check_rw_degradable(struct btrfs_fs_info *fs_info,

					struct btrfs_device *failing_dev);

void btrfs_scratch_superblocks(struct btrfs_fs_info *fs_info,

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