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Commit bed92eae authored by Arne Jansen's avatar Arne Jansen Committed by Jan Schmidt
Browse files

Btrfs: qgroup implementation and prototypes 



Signed-off-by: default avatarArne Jansen <sensille@gmx.net>
Signed-off-by: default avatarJan Schmidt <list.btrfs@jan-o-sch.net>
parent 709c0486

fs/btrfs/Makefile

+1 −1
Original line number 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 \

	   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 \

	   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_CHECK_INTEGRITY) += check-integrity.o

fs/btrfs/ctree.h

+46 −0
Original line number 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_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 */

int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,

		     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,

			 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)

{

	if (rootid == BTRFS_FS_TREE_OBJECTID ||

fs/btrfs/extent-tree.c

+34 −0
Original line number Diff line number Diff line
@@ -2409,6 +2409,40 @@ static u64 find_middle(struct rb_root *root) 
}

#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

 * extent insertions we have queued up so far.  count can be

fs/btrfs/ioctl.h

+24 −0
Original line number Diff line number Diff line
@@ -35,6 +35,30 @@ struct btrfs_ioctl_vol_args { 
#define BTRFS_FSID_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

struct btrfs_ioctl_vol_args_v2 {

	__s64 fd;