diff options
Diffstat (limited to 'fs/btrfs/qgroup.h')
| -rw-r--r-- | fs/btrfs/qgroup.h | 139 |
1 files changed, 57 insertions, 82 deletions
diff --git a/fs/btrfs/qgroup.h b/fs/btrfs/qgroup.h index 1203f06320..be18c862e6 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 @@ -229,6 +236,24 @@ struct btrfs_qgroup { * 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 */ /* @@ -244,6 +269,19 @@ 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 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)); @@ -258,14 +296,23 @@ 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); @@ -276,80 +323,16 @@ 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); @@ -359,7 +342,8 @@ 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); @@ -417,20 +401,8 @@ 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 */ @@ -448,5 +420,8 @@ 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); +void btrfs_free_squota_rsv(struct btrfs_fs_info *fs_info, u64 root, u64 rsv_bytes); +int btrfs_record_squota_delta(struct btrfs_fs_info *fs_info, + struct btrfs_squota_delta *delta); #endif |