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-rw-r--r--fs/btrfs/qgroup.h149
1 files changed, 67 insertions, 82 deletions
diff --git a/fs/btrfs/qgroup.h b/fs/btrfs/qgroup.h
index 7bffa10589d6..855a4f978761 100644
--- a/fs/btrfs/qgroup.h
+++ b/fs/btrfs/qgroup.h
@@ -101,8 +101,15 @@
* subtree rescan for them.
*/
-#define BTRFS_QGROUP_RUNTIME_FLAG_CANCEL_RESCAN (1UL << 3)
-#define BTRFS_QGROUP_RUNTIME_FLAG_NO_ACCOUNTING (1UL << 4)
+/*
+ * These flags share the flags field of the btrfs_qgroup_status_item with the
+ * persisted flags defined in btrfs_tree.h.
+ *
+ * To minimize the chance of collision with new persisted status flags, these
+ * count backwards from the MSB.
+ */
+#define BTRFS_QGROUP_RUNTIME_FLAG_CANCEL_RESCAN (1ULL << 63)
+#define BTRFS_QGROUP_RUNTIME_FLAG_NO_ACCOUNTING (1ULL << 62)
/*
* Record a dirty extent, and info qgroup to update quota on it
@@ -220,6 +227,33 @@ struct btrfs_qgroup {
struct list_head groups; /* groups this group is member of */
struct list_head members; /* groups that are members of this group */
struct list_head dirty; /* dirty groups */
+
+ /*
+ * For qgroup iteration usage.
+ *
+ * The iteration list should always be empty until qgroup_iterator_add()
+ * is called. And should be reset to empty after the iteration is
+ * finished.
+ */
+ struct list_head iterator;
+
+ /*
+ * For nested iterator usage.
+ *
+ * Here we support at most one level of nested iterator calls like:
+ *
+ * LIST_HEAD(all_qgroups);
+ * {
+ * LIST_HEAD(local_qgroups);
+ * qgroup_iterator_add(local_qgroups, qg);
+ * qgroup_iterator_nested_add(all_qgroups, qg);
+ * do_some_work(local_qgroups);
+ * qgroup_iterator_clean(local_qgroups);
+ * }
+ * do_some_work(all_qgroups);
+ * qgroup_iterator_nested_clean(all_qgroups);
+ */
+ struct list_head nested_iterator;
struct rb_node node; /* tree of qgroups */
/*
@@ -235,6 +269,21 @@ struct btrfs_qgroup {
struct kobject kobj;
};
+struct btrfs_squota_delta {
+ /* The fstree root this delta counts against. */
+ u64 root;
+ /* The number of bytes in the extent being counted. */
+ u64 num_bytes;
+ /* The number of bytes reserved for this extent. */
+ u64 rsv_bytes;
+ /* The generation the extent was created in. */
+ u64 generation;
+ /* Whether we are using or freeing the extent. */
+ bool is_inc;
+ /* Whether the extent is data or metadata. */
+ bool is_data;
+};
+
static inline u64 btrfs_qgroup_subvolid(u64 qgroupid)
{
return (qgroupid & ((1ULL << BTRFS_QGROUP_LEVEL_SHIFT) - 1));
@@ -249,14 +298,23 @@ enum {
ENUM_BIT(QGROUP_FREE),
};
-int btrfs_quota_enable(struct btrfs_fs_info *fs_info);
+enum btrfs_qgroup_mode {
+ BTRFS_QGROUP_MODE_DISABLED,
+ BTRFS_QGROUP_MODE_FULL,
+ BTRFS_QGROUP_MODE_SIMPLE
+};
+
+enum btrfs_qgroup_mode btrfs_qgroup_mode(struct btrfs_fs_info *fs_info);
+bool btrfs_qgroup_enabled(struct btrfs_fs_info *fs_info);
+bool btrfs_qgroup_full_accounting(struct btrfs_fs_info *fs_info);
+int btrfs_quota_enable(struct btrfs_fs_info *fs_info,
+ struct btrfs_ioctl_quota_ctl_args *quota_ctl_args);
int btrfs_quota_disable(struct btrfs_fs_info *fs_info);
int btrfs_qgroup_rescan(struct btrfs_fs_info *fs_info);
void btrfs_qgroup_rescan_resume(struct btrfs_fs_info *fs_info);
int btrfs_qgroup_wait_for_completion(struct btrfs_fs_info *fs_info,
bool interruptible);
-int btrfs_add_qgroup_relation(struct btrfs_trans_handle *trans, u64 src,
- u64 dst);
+int btrfs_add_qgroup_relation(struct btrfs_trans_handle *trans, u64 src, u64 dst);
int btrfs_del_qgroup_relation(struct btrfs_trans_handle *trans, u64 src,
u64 dst);
int btrfs_create_qgroup(struct btrfs_trans_handle *trans, u64 qgroupid);
@@ -267,80 +325,16 @@ 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;
-/*
- * Inform qgroup to trace one dirty extent, its info is recorded in @record.
- * So qgroup can account it at transaction committing time.
- *
- * No lock version, caller must acquire delayed ref lock and allocated memory,
- * then call btrfs_qgroup_trace_extent_post() after exiting lock context.
- *
- * Return 0 for success insert
- * Return >0 for existing record, caller can free @record safely.
- * Error is not possible
- */
int btrfs_qgroup_trace_extent_nolock(
struct btrfs_fs_info *fs_info,
struct btrfs_delayed_ref_root *delayed_refs,
struct btrfs_qgroup_extent_record *record);
-
-/*
- * Post handler after qgroup_trace_extent_nolock().
- *
- * NOTE: Current qgroup does the expensive backref walk at transaction
- * committing time with TRANS_STATE_COMMIT_DOING, this blocks incoming
- * new transaction.
- * This is designed to allow btrfs_find_all_roots() to get correct new_roots
- * result.
- *
- * However for old_roots there is no need to do backref walk at that time,
- * since we search commit roots to walk backref and result will always be
- * correct.
- *
- * Due to the nature of no lock version, we can't do backref there.
- * So we must call btrfs_qgroup_trace_extent_post() after exiting
- * spinlock context.
- *
- * TODO: If we can fix and prove btrfs_find_all_roots() can get correct result
- * using current root, then we can move all expensive backref walk out of
- * transaction committing, but not now as qgroup accounting will be wrong again.
- */
int btrfs_qgroup_trace_extent_post(struct btrfs_trans_handle *trans,
struct btrfs_qgroup_extent_record *qrecord);
-
-/*
- * Inform qgroup to trace one dirty extent, specified by @bytenr and
- * @num_bytes.
- * So qgroup can account it at commit trans time.
- *
- * Better encapsulated version, with memory allocation and backref walk for
- * commit roots.
- * So this can sleep.
- *
- * Return 0 if the operation is done.
- * Return <0 for error, like memory allocation failure or invalid parameter
- * (NULL trans)
- */
int btrfs_qgroup_trace_extent(struct btrfs_trans_handle *trans, u64 bytenr,
u64 num_bytes);
-
-/*
- * Inform qgroup to trace all leaf items of data
- *
- * Return 0 for success
- * Return <0 for error(ENOMEM)
- */
int btrfs_qgroup_trace_leaf_items(struct btrfs_trans_handle *trans,
struct extent_buffer *eb);
-/*
- * Inform qgroup to trace a whole subtree, including all its child tree
- * blocks and data.
- * The root tree block is specified by @root_eb.
- *
- * Normally used by relocation(tree block swap) and subvolume deletion.
- *
- * Return 0 for success
- * Return <0 for error(ENOMEM or tree search error)
- */
int btrfs_qgroup_trace_subtree(struct btrfs_trans_handle *trans,
struct extent_buffer *root_eb,
u64 root_gen, int root_level);
@@ -350,7 +344,8 @@ int btrfs_qgroup_account_extent(struct btrfs_trans_handle *trans, u64 bytenr,
int btrfs_qgroup_account_extents(struct btrfs_trans_handle *trans);
int btrfs_run_qgroups(struct btrfs_trans_handle *trans);
int btrfs_qgroup_inherit(struct btrfs_trans_handle *trans, u64 srcid,
- u64 objectid, struct btrfs_qgroup_inherit *inherit);
+ u64 objectid, u64 inode_rootid,
+ struct btrfs_qgroup_inherit *inherit);
void btrfs_qgroup_free_refroot(struct btrfs_fs_info *fs_info,
u64 ref_root, u64 num_bytes,
enum btrfs_qgroup_rsv_type type);
@@ -408,20 +403,8 @@ static inline void btrfs_qgroup_free_meta_prealloc(struct btrfs_root *root,
BTRFS_QGROUP_RSV_META_PREALLOC);
}
-/*
- * Per-transaction meta reservation should be all freed at transaction commit
- * time
- */
void btrfs_qgroup_free_meta_all_pertrans(struct btrfs_root *root);
-
-/*
- * Convert @num_bytes of META_PREALLOCATED reservation to META_PERTRANS.
- *
- * This is called when preallocated meta reservation needs to be used.
- * Normally after btrfs_join_transaction() call.
- */
void btrfs_qgroup_convert_reserved_meta(struct btrfs_root *root, int num_bytes);
-
void btrfs_qgroup_check_reserved_leak(struct btrfs_inode *inode);
/* btrfs_qgroup_swapped_blocks related functions */
@@ -439,5 +422,7 @@ int btrfs_qgroup_trace_subtree_after_cow(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct extent_buffer *eb);
void btrfs_qgroup_destroy_extent_records(struct btrfs_transaction *trans);
bool btrfs_check_quota_leak(struct btrfs_fs_info *fs_info);
+int btrfs_record_squota_delta(struct btrfs_fs_info *fs_info,
+ struct btrfs_squota_delta *delta);
#endif