diff options
| -rw-r--r-- | fs/btrfs/ctree.h | 2 | ||||
| -rw-r--r-- | fs/btrfs/disk-io.c | 9 | ||||
| -rw-r--r-- | fs/btrfs/sysfs.c | 36 | ||||
| -rw-r--r-- | fs/btrfs/sysfs.h | 10 |
4 files changed, 57 insertions, 0 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 498452ebfd37..c5c888fbf033 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -3780,6 +3780,8 @@ int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, /* sysfs.c */ int btrfs_init_sysfs(void); void btrfs_exit_sysfs(void); +int btrfs_sysfs_add_one(struct btrfs_fs_info *fs_info); +void btrfs_sysfs_remove_one(struct btrfs_fs_info *fs_info); /* xattr.c */ ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size); diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 435ef132b800..81f3433fe4fd 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -48,6 +48,7 @@ #include "rcu-string.h" #include "dev-replace.h" #include "raid56.h" +#include "sysfs.h" #ifdef CONFIG_X86 #include <asm/cpufeature.h> @@ -2743,6 +2744,12 @@ retry_root_backup: btrfs_close_extra_devices(fs_info, fs_devices, 1); + ret = btrfs_sysfs_add_one(fs_info); + if (ret) { + pr_err("btrfs: failed to init sysfs interface: %d\n", ret); + goto fail_block_groups; + } + ret = btrfs_init_space_info(fs_info); if (ret) { printk(KERN_ERR "Failed to initial space info: %d\n", ret); @@ -3584,6 +3591,8 @@ int close_ctree(struct btrfs_root *root) percpu_counter_sum(&fs_info->delalloc_bytes)); } + btrfs_sysfs_remove_one(fs_info); + del_fs_roots(fs_info); btrfs_free_block_groups(fs_info); diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c index 9e217b581903..79be4a187af9 100644 --- a/fs/btrfs/sysfs.c +++ b/fs/btrfs/sysfs.c @@ -28,6 +28,25 @@ #include "transaction.h" #include "sysfs.h" +static void btrfs_release_super_kobj(struct kobject *kobj); +static struct kobj_type btrfs_ktype = { + .sysfs_ops = &kobj_sysfs_ops, + .release = btrfs_release_super_kobj, +}; + +static inline struct btrfs_fs_info *to_fs_info(struct kobject *kobj) +{ + if (kobj->ktype != &btrfs_ktype) + return NULL; + return container_of(kobj, struct btrfs_fs_info, super_kobj); +} + +static void btrfs_release_super_kobj(struct kobject *kobj) +{ + struct btrfs_fs_info *fs_info = to_fs_info(kobj); + complete(&fs_info->kobj_unregister); +} + static ssize_t btrfs_feature_attr_show(struct kobject *kobj, struct kobj_attribute *a, char *buf) { @@ -65,6 +84,23 @@ static const struct attribute_group btrfs_feature_attr_group = { /* /sys/fs/btrfs/ entry */ static struct kset *btrfs_kset; +void btrfs_sysfs_remove_one(struct btrfs_fs_info *fs_info) +{ + kobject_del(&fs_info->super_kobj); + kobject_put(&fs_info->super_kobj); + wait_for_completion(&fs_info->kobj_unregister); +} + +int btrfs_sysfs_add_one(struct btrfs_fs_info *fs_info) +{ + int error; + + init_completion(&fs_info->kobj_unregister); + error = kobject_init_and_add(&fs_info->super_kobj, &btrfs_ktype, NULL, + "%pU", fs_info->fsid); + return error; +} + int btrfs_init_sysfs(void) { int ret; diff --git a/fs/btrfs/sysfs.h b/fs/btrfs/sysfs.h index 863e031ed1c1..d7c61bdf04ba 100644 --- a/fs/btrfs/sysfs.h +++ b/fs/btrfs/sysfs.h @@ -15,6 +15,13 @@ enum btrfs_feature_set { .store = _store, \ } +#define BTRFS_ATTR_RW(_name, _mode, _show, _store) \ +static struct kobj_attribute btrfs_attr_##_name = \ + __INIT_KOBJ_ATTR(_name, _mode, _show, _store) +#define BTRFS_ATTR(_name, _mode, _show) \ + BTRFS_ATTR_RW(_name, _mode, _show, NULL) +#define BTRFS_ATTR_PTR(_name) (&btrfs_attr_##_name.attr) + struct btrfs_feature_attr { struct kobj_attribute kobj_attr; enum btrfs_feature_set feature_set; @@ -40,4 +47,7 @@ static struct btrfs_feature_attr btrfs_attr_##_name = { \ /* convert from attribute */ #define to_btrfs_feature_attr(a) \ container_of(a, struct btrfs_feature_attr, kobj_attr) +#define attr_to_btrfs_attr(a) container_of(a, struct kobj_attribute, attr) +#define attr_to_btrfs_feature_attr(a) \ + to_btrfs_feature_attr(attr_to_btrfs_attr(a)) #endif /* _BTRFS_SYSFS_H_ */ |