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| author | Jeff Mahoney | 2013-11-01 18:07:05 +0100 |
|---|---|---|
| committer | Chris Mason | 2014-01-28 22:19:29 +0100 |
| commit | 29e5be240a3caf175364fdeecb0441dff500d5d9 (patch) | |
| tree | 69ebd72d838112a3c4fefc5fba2620c3eb2fae51 /fs/btrfs/sysfs.c | |
| parent | btrfs: publish allocation data in sysfs (diff) | |
| download | kernel-qcow2-linux-29e5be240a3caf175364fdeecb0441dff500d5d9.tar.gz kernel-qcow2-linux-29e5be240a3caf175364fdeecb0441dff500d5d9.tar.xz kernel-qcow2-linux-29e5be240a3caf175364fdeecb0441dff500d5d9.zip | |
btrfs: publish device membership in sysfs
Now that we have the infrastructure for per-super attributes, we can
publish device membership in /sys/fs/btrfs/<fsid>/devices. The information
is published as symlinks to the block devices.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <clm@fb.com>
Diffstat (limited to 'fs/btrfs/sysfs.c')
| -rw-r--r-- | fs/btrfs/sysfs.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c index e060958a6382..ec6315391111 100644 --- a/fs/btrfs/sysfs.c +++ b/fs/btrfs/sysfs.c @@ -23,11 +23,13 @@ #include <linux/buffer_head.h> #include <linux/kobject.h> #include <linux/bug.h> +#include <linux/genhd.h> #include "ctree.h" #include "disk-io.h" #include "transaction.h" #include "sysfs.h" +#include "volumes.h" static inline struct btrfs_fs_info *to_fs_info(struct kobject *kobj); @@ -374,6 +376,8 @@ static inline struct btrfs_fs_info *to_fs_info(struct kobject *kobj) void btrfs_sysfs_remove_one(struct btrfs_fs_info *fs_info) { sysfs_remove_files(fs_info->space_info_kobj, allocation_attrs); + kobject_del(fs_info->device_dir_kobj); + kobject_put(fs_info->device_dir_kobj); kobject_del(fs_info->space_info_kobj); kobject_put(fs_info->space_info_kobj); kobject_del(&fs_info->super_kobj); @@ -507,6 +511,30 @@ static int add_unknown_feature_attrs(struct btrfs_fs_info *fs_info) return 0; } +static int add_device_membership(struct btrfs_fs_info *fs_info) +{ + int error = 0; + struct btrfs_fs_devices *fs_devices = fs_info->fs_devices; + struct btrfs_device *dev; + + fs_info->device_dir_kobj = kobject_create_and_add("devices", + &fs_info->super_kobj); + if (!fs_info->device_dir_kobj) + return -ENOMEM; + + list_for_each_entry(dev, &fs_devices->devices, dev_list) { + struct hd_struct *disk = dev->bdev->bd_part; + struct kobject *disk_kobj = &part_to_dev(disk)->kobj; + + error = sysfs_create_link(fs_info->device_dir_kobj, + disk_kobj, disk_kobj->name); + if (error) + break; + } + + return error; +} + /* /sys/fs/btrfs/ entry */ static struct kset *btrfs_kset; @@ -528,6 +556,10 @@ int btrfs_sysfs_add_one(struct btrfs_fs_info *fs_info) if (error) goto failure; + error = add_device_membership(fs_info); + if (error) + goto failure; + fs_info->space_info_kobj = kobject_create_and_add("allocation", &fs_info->super_kobj); if (!fs_info->space_info_kobj) { |