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26#ifndef OCFS2_ALLOC_H
27#define OCFS2_ALLOC_H
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33#define OCFS2_MAX_XATTR_TREE_LEAF_SIZE 65536
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55struct ocfs2_extent_tree_operations;
56struct ocfs2_extent_tree {
57 const struct ocfs2_extent_tree_operations *et_ops;
58 struct buffer_head *et_root_bh;
59 struct ocfs2_extent_list *et_root_el;
60 struct ocfs2_caching_info *et_ci;
61 ocfs2_journal_access_func et_root_journal_access;
62 void *et_object;
63 unsigned int et_max_leaf_clusters;
64 struct ocfs2_cached_dealloc_ctxt *et_dealloc;
65};
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70
71void ocfs2_init_dinode_extent_tree(struct ocfs2_extent_tree *et,
72 struct ocfs2_caching_info *ci,
73 struct buffer_head *bh);
74void ocfs2_init_xattr_tree_extent_tree(struct ocfs2_extent_tree *et,
75 struct ocfs2_caching_info *ci,
76 struct buffer_head *bh);
77struct ocfs2_xattr_value_buf;
78void ocfs2_init_xattr_value_extent_tree(struct ocfs2_extent_tree *et,
79 struct ocfs2_caching_info *ci,
80 struct ocfs2_xattr_value_buf *vb);
81void ocfs2_init_dx_root_extent_tree(struct ocfs2_extent_tree *et,
82 struct ocfs2_caching_info *ci,
83 struct buffer_head *bh);
84void ocfs2_init_refcount_extent_tree(struct ocfs2_extent_tree *et,
85 struct ocfs2_caching_info *ci,
86 struct buffer_head *bh);
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92
93int ocfs2_read_extent_block(struct ocfs2_caching_info *ci, u64 eb_blkno,
94 struct buffer_head **bh);
95
96struct ocfs2_alloc_context;
97int ocfs2_insert_extent(handle_t *handle,
98 struct ocfs2_extent_tree *et,
99 u32 cpos,
100 u64 start_blk,
101 u32 new_clusters,
102 u8 flags,
103 struct ocfs2_alloc_context *meta_ac);
104
105enum ocfs2_alloc_restarted {
106 RESTART_NONE = 0,
107 RESTART_TRANS,
108 RESTART_META
109};
110int ocfs2_add_clusters_in_btree(handle_t *handle,
111 struct ocfs2_extent_tree *et,
112 u32 *logical_offset,
113 u32 clusters_to_add,
114 int mark_unwritten,
115 struct ocfs2_alloc_context *data_ac,
116 struct ocfs2_alloc_context *meta_ac,
117 enum ocfs2_alloc_restarted *reason_ret);
118struct ocfs2_cached_dealloc_ctxt;
119struct ocfs2_path;
120int ocfs2_split_extent(handle_t *handle,
121 struct ocfs2_extent_tree *et,
122 struct ocfs2_path *path,
123 int split_index,
124 struct ocfs2_extent_rec *split_rec,
125 struct ocfs2_alloc_context *meta_ac,
126 struct ocfs2_cached_dealloc_ctxt *dealloc);
127int ocfs2_mark_extent_written(struct inode *inode,
128 struct ocfs2_extent_tree *et,
129 handle_t *handle, u32 cpos, u32 len, u32 phys,
130 struct ocfs2_alloc_context *meta_ac,
131 struct ocfs2_cached_dealloc_ctxt *dealloc);
132int ocfs2_change_extent_flag(handle_t *handle,
133 struct ocfs2_extent_tree *et,
134 u32 cpos, u32 len, u32 phys,
135 struct ocfs2_alloc_context *meta_ac,
136 struct ocfs2_cached_dealloc_ctxt *dealloc,
137 int new_flags, int clear_flags);
138int ocfs2_remove_extent(handle_t *handle, struct ocfs2_extent_tree *et,
139 u32 cpos, u32 len,
140 struct ocfs2_alloc_context *meta_ac,
141 struct ocfs2_cached_dealloc_ctxt *dealloc);
142int ocfs2_remove_btree_range(struct inode *inode,
143 struct ocfs2_extent_tree *et,
144 u32 cpos, u32 phys_cpos, u32 len, int flags,
145 struct ocfs2_cached_dealloc_ctxt *dealloc,
146 u64 refcount_loc, bool refcount_tree_locked);
147
148int ocfs2_num_free_extents(struct ocfs2_extent_tree *et);
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157static inline int ocfs2_extend_meta_needed(struct ocfs2_extent_list *root_el)
158{
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167 return le16_to_cpu(root_el->l_tree_depth) + 2;
168}
169
170void ocfs2_dinode_new_extent_list(struct inode *inode, struct ocfs2_dinode *di);
171void ocfs2_set_inode_data_inline(struct inode *inode, struct ocfs2_dinode *di);
172int ocfs2_convert_inline_data_to_extents(struct inode *inode,
173 struct buffer_head *di_bh);
174
175int ocfs2_truncate_log_init(struct ocfs2_super *osb);
176void ocfs2_truncate_log_shutdown(struct ocfs2_super *osb);
177void ocfs2_schedule_truncate_log_flush(struct ocfs2_super *osb,
178 int cancel);
179int ocfs2_flush_truncate_log(struct ocfs2_super *osb);
180int ocfs2_begin_truncate_log_recovery(struct ocfs2_super *osb,
181 int slot_num,
182 struct ocfs2_dinode **tl_copy);
183int ocfs2_complete_truncate_log_recovery(struct ocfs2_super *osb,
184 struct ocfs2_dinode *tl_copy);
185int ocfs2_truncate_log_needs_flush(struct ocfs2_super *osb);
186int ocfs2_truncate_log_append(struct ocfs2_super *osb,
187 handle_t *handle,
188 u64 start_blk,
189 unsigned int num_clusters);
190int __ocfs2_flush_truncate_log(struct ocfs2_super *osb);
191int ocfs2_try_to_free_truncate_log(struct ocfs2_super *osb,
192 unsigned int needed);
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203struct ocfs2_cached_dealloc_ctxt {
204 struct ocfs2_per_slot_free_list *c_first_suballocator;
205 struct ocfs2_cached_block_free *c_global_allocator;
206};
207static inline void ocfs2_init_dealloc_ctxt(struct ocfs2_cached_dealloc_ctxt *c)
208{
209 c->c_first_suballocator = NULL;
210 c->c_global_allocator = NULL;
211}
212int ocfs2_cache_cluster_dealloc(struct ocfs2_cached_dealloc_ctxt *ctxt,
213 u64 blkno, unsigned int bit);
214int ocfs2_cache_block_dealloc(struct ocfs2_cached_dealloc_ctxt *ctxt,
215 int type, int slot, u64 suballoc, u64 blkno,
216 unsigned int bit);
217static inline int ocfs2_dealloc_has_cluster(struct ocfs2_cached_dealloc_ctxt *c)
218{
219 return c->c_global_allocator != NULL;
220}
221int ocfs2_run_deallocs(struct ocfs2_super *osb,
222 struct ocfs2_cached_dealloc_ctxt *ctxt);
223
224struct ocfs2_truncate_context {
225 struct ocfs2_cached_dealloc_ctxt tc_dealloc;
226 int tc_ext_alloc_locked;
227
228 struct buffer_head *tc_last_eb_bh;
229};
230
231int ocfs2_zero_range_for_truncate(struct inode *inode, handle_t *handle,
232 u64 range_start, u64 range_end);
233int ocfs2_commit_truncate(struct ocfs2_super *osb,
234 struct inode *inode,
235 struct buffer_head *di_bh);
236int ocfs2_truncate_inline(struct inode *inode, struct buffer_head *di_bh,
237 unsigned int start, unsigned int end, int trunc);
238
239int ocfs2_find_leaf(struct ocfs2_caching_info *ci,
240 struct ocfs2_extent_list *root_el, u32 cpos,
241 struct buffer_head **leaf_bh);
242int ocfs2_search_extent_list(struct ocfs2_extent_list *el, u32 v_cluster);
243
244int ocfs2_trim_fs(struct super_block *sb, struct fstrim_range *range);
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248static inline unsigned int ocfs2_rec_clusters(struct ocfs2_extent_list *el,
249 struct ocfs2_extent_rec *rec)
250{
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258 if (el->l_tree_depth)
259 return le32_to_cpu(rec->e_int_clusters);
260 else
261 return le16_to_cpu(rec->e_leaf_clusters);
262}
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268static inline int ocfs2_is_empty_extent(struct ocfs2_extent_rec *rec)
269{
270 return !rec->e_leaf_clusters;
271}
272
273int ocfs2_grab_pages(struct inode *inode, loff_t start, loff_t end,
274 struct page **pages, int *num);
275void ocfs2_map_and_dirty_page(struct inode *inode, handle_t *handle,
276 unsigned int from, unsigned int to,
277 struct page *page, int zero, u64 *phys);
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285struct ocfs2_path_item {
286 struct buffer_head *bh;
287 struct ocfs2_extent_list *el;
288};
289
290#define OCFS2_MAX_PATH_DEPTH 5
291
292struct ocfs2_path {
293 int p_tree_depth;
294 ocfs2_journal_access_func p_root_access;
295 struct ocfs2_path_item p_node[OCFS2_MAX_PATH_DEPTH];
296};
297
298#define path_root_bh(_path) ((_path)->p_node[0].bh)
299#define path_root_el(_path) ((_path)->p_node[0].el)
300#define path_root_access(_path)((_path)->p_root_access)
301#define path_leaf_bh(_path) ((_path)->p_node[(_path)->p_tree_depth].bh)
302#define path_leaf_el(_path) ((_path)->p_node[(_path)->p_tree_depth].el)
303#define path_num_items(_path) ((_path)->p_tree_depth + 1)
304
305void ocfs2_reinit_path(struct ocfs2_path *path, int keep_root);
306void ocfs2_free_path(struct ocfs2_path *path);
307int ocfs2_find_path(struct ocfs2_caching_info *ci,
308 struct ocfs2_path *path,
309 u32 cpos);
310struct ocfs2_path *ocfs2_new_path_from_path(struct ocfs2_path *path);
311struct ocfs2_path *ocfs2_new_path_from_et(struct ocfs2_extent_tree *et);
312int ocfs2_path_bh_journal_access(handle_t *handle,
313 struct ocfs2_caching_info *ci,
314 struct ocfs2_path *path,
315 int idx);
316int ocfs2_journal_access_path(struct ocfs2_caching_info *ci,
317 handle_t *handle,
318 struct ocfs2_path *path);
319int ocfs2_find_cpos_for_right_leaf(struct super_block *sb,
320 struct ocfs2_path *path, u32 *cpos);
321int ocfs2_find_cpos_for_left_leaf(struct super_block *sb,
322 struct ocfs2_path *path, u32 *cpos);
323int ocfs2_find_subtree_root(struct ocfs2_extent_tree *et,
324 struct ocfs2_path *left,
325 struct ocfs2_path *right);
326#endif
327