Btrfs: qgroup implementation and prototypes (bed92eae) · Commits · e / devices / android_kernel_sony_msm8994

fs/btrfs/Makefile

+1 −1

Original line number	Original line	Diff line number	Diff line
	@@ -8,7 +8,7 @@ btrfs-y += super.o ctree.o extent-tree.o print-tree.o root-tree.o dir-item.o \
	extent_io.o volumes.o async-thread.o ioctl.o locking.o orphan.o \		extent_io.o volumes.o async-thread.o ioctl.o locking.o orphan.o \
	export.o tree-log.o free-space-cache.o zlib.o lzo.o \		export.o tree-log.o free-space-cache.o zlib.o lzo.o \
	compression.o delayed-ref.o relocation.o delayed-inode.o scrub.o \		compression.o delayed-ref.o relocation.o delayed-inode.o scrub.o \
	reada.o backref.o ulist.o		reada.o backref.o ulist.o qgroup.o

	btrfs-$(CONFIG_BTRFS_FS_POSIX_ACL) += acl.o		btrfs-$(CONFIG_BTRFS_FS_POSIX_ACL) += acl.o
	btrfs-$(CONFIG_BTRFS_FS_CHECK_INTEGRITY) += check-integrity.o		btrfs-$(CONFIG_BTRFS_FS_CHECK_INTEGRITY) += check-integrity.o

fs/btrfs/ctree.h

+46 −0

Original line number	Original line	Diff line number	Diff line
	@@ -2830,6 +2830,8 @@ int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
	int btrfs_trim_fs(struct btrfs_root root, struct fstrim_range range);		int btrfs_trim_fs(struct btrfs_root root, struct fstrim_range range);

	int btrfs_init_space_info(struct btrfs_fs_info *fs_info);		int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
			int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
			struct btrfs_fs_info *fs_info);
	/* ctree.c */		/* ctree.c */
	int btrfs_bin_search(struct extent_buffer eb, struct btrfs_key key,		int btrfs_bin_search(struct extent_buffer eb, struct btrfs_key key,
	int level, int *slot);		int level, int *slot);
	@@ -3339,6 +3341,50 @@ void btrfs_reada_detach(void *handle);
	int btree_readahead_hook(struct btrfs_root root, struct extent_buffer eb,		int btree_readahead_hook(struct btrfs_root root, struct extent_buffer eb,
	u64 start, int err);		u64 start, int err);

			/* qgroup.c */
			struct qgroup_update {
			struct list_head list;
			struct btrfs_delayed_ref_node *node;
			struct btrfs_delayed_extent_op *extent_op;
			};

			int btrfs_quota_enable(struct btrfs_trans_handle *trans,
			struct btrfs_fs_info *fs_info);
			int btrfs_quota_disable(struct btrfs_trans_handle *trans,
			struct btrfs_fs_info *fs_info);
			int btrfs_quota_rescan(struct btrfs_fs_info *fs_info);
			int btrfs_add_qgroup_relation(struct btrfs_trans_handle *trans,
			struct btrfs_fs_info *fs_info, u64 src, u64 dst);
			int btrfs_del_qgroup_relation(struct btrfs_trans_handle *trans,
			struct btrfs_fs_info *fs_info, u64 src, u64 dst);
			int btrfs_create_qgroup(struct btrfs_trans_handle *trans,
			struct btrfs_fs_info *fs_info, u64 qgroupid,
			char *name);
			int btrfs_remove_qgroup(struct btrfs_trans_handle *trans,
			struct btrfs_fs_info *fs_info, u64 qgroupid);
			int btrfs_limit_qgroup(struct btrfs_trans_handle *trans,
			struct btrfs_fs_info *fs_info, u64 qgroupid,
			struct btrfs_qgroup_limit *limit);
			int btrfs_read_qgroup_config(struct btrfs_fs_info *fs_info);
			void btrfs_free_qgroup_config(struct btrfs_fs_info *fs_info);
			struct btrfs_delayed_extent_op;
			int btrfs_qgroup_record_ref(struct btrfs_trans_handle *trans,
			struct btrfs_delayed_ref_node *node,
			struct btrfs_delayed_extent_op *extent_op);
			int btrfs_qgroup_account_ref(struct btrfs_trans_handle *trans,
			struct btrfs_fs_info *fs_info,
			struct btrfs_delayed_ref_node *node,
			struct btrfs_delayed_extent_op *extent_op);
			int btrfs_run_qgroups(struct btrfs_trans_handle *trans,
			struct btrfs_fs_info *fs_info);
			int btrfs_qgroup_inherit(struct btrfs_trans_handle *trans,
			struct btrfs_fs_info *fs_info, u64 srcid, u64 objectid,
			struct btrfs_qgroup_inherit *inherit);
			int btrfs_qgroup_reserve(struct btrfs_root *root, u64 num_bytes);
			void btrfs_qgroup_free(struct btrfs_root *root, u64 num_bytes);

			void assert_qgroups_uptodate(struct btrfs_trans_handle *trans);

	static inline int is_fstree(u64 rootid)		static inline int is_fstree(u64 rootid)
	{		{
	if (rootid == BTRFS_FS_TREE_OBJECTID \|\|		if (rootid == BTRFS_FS_TREE_OBJECTID \|\|

fs/btrfs/extent-tree.c

+34 −0

Original line number	Original line	Diff line number	Diff line
	@@ -2409,6 +2409,40 @@ static u64 find_middle(struct rb_root *root)
	}		}
	#endif		#endif

			int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
			struct btrfs_fs_info *fs_info)
			{
			struct qgroup_update *qgroup_update;
			int ret = 0;

			if (list_empty(&trans->qgroup_ref_list) !=
			!trans->delayed_ref_elem.seq) {
			/* list without seq or seq without list */
			printk(KERN_ERR "btrfs: qgroup accounting update error, list is%s empty, seq is %llu\n",
			list_empty(&trans->qgroup_ref_list) ? "" : " not",
			trans->delayed_ref_elem.seq);
			BUG();
			}

			if (!trans->delayed_ref_elem.seq)
			return 0;

			while (!list_empty(&trans->qgroup_ref_list)) {
			qgroup_update = list_first_entry(&trans->qgroup_ref_list,
			struct qgroup_update, list);
			list_del(&qgroup_update->list);
			if (!ret)
			ret = btrfs_qgroup_account_ref(
			trans, fs_info, qgroup_update->node,
			qgroup_update->extent_op);
			kfree(qgroup_update);
			}

			btrfs_put_tree_mod_seq(fs_info, &trans->delayed_ref_elem);

			return ret;
			}

	/*		/*
	* this starts processing the delayed reference count updates and		* this starts processing the delayed reference count updates and
	* extent insertions we have queued up so far. count can be		* extent insertions we have queued up so far. count can be

fs/btrfs/ioctl.h

+24 −0

Original line number	Original line	Diff line number	Diff line
	@@ -35,6 +35,30 @@ struct btrfs_ioctl_vol_args {
	#define BTRFS_FSID_SIZE 16		#define BTRFS_FSID_SIZE 16
	#define BTRFS_UUID_SIZE 16		#define BTRFS_UUID_SIZE 16

			#define BTRFS_QGROUP_INHERIT_SET_LIMITS (1ULL << 0)

			struct btrfs_qgroup_limit {
			__u64 flags;
			__u64 max_rfer;
			__u64 max_excl;
			__u64 rsv_rfer;
			__u64 rsv_excl;
			};

			struct btrfs_qgroup_inherit {
			__u64 flags;
			__u64 num_qgroups;
			__u64 num_ref_copies;
			__u64 num_excl_copies;
			struct btrfs_qgroup_limit lim;
			__u64 qgroups[0];
			};

			struct btrfs_ioctl_qgroup_limit_args {
			__u64 qgroupid;
			struct btrfs_qgroup_limit lim;
			};

	#define BTRFS_SUBVOL_NAME_MAX 4039		#define BTRFS_SUBVOL_NAME_MAX 4039
	struct btrfs_ioctl_vol_args_v2 {		struct btrfs_ioctl_vol_args_v2 {
	__s64 fd;		__s64 fd;

fs/btrfs/qgroup.c

0 → 100644

+1571 −0

File added.

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