Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 1 | #ifndef __EXTENTIO__ |
| 2 | #define __EXTENTIO__ |
| 3 | |
| 4 | #include <linux/rbtree.h> |
| 5 | |
| 6 | /* bits for the extent state */ |
| 7 | #define EXTENT_DIRTY 1 |
| 8 | #define EXTENT_WRITEBACK (1 << 1) |
| 9 | #define EXTENT_UPTODATE (1 << 2) |
| 10 | #define EXTENT_LOCKED (1 << 3) |
| 11 | #define EXTENT_NEW (1 << 4) |
| 12 | #define EXTENT_DELALLOC (1 << 5) |
| 13 | #define EXTENT_DEFRAG (1 << 6) |
| 14 | #define EXTENT_DEFRAG_DONE (1 << 7) |
| 15 | #define EXTENT_BUFFER_FILLED (1 << 8) |
Chris Mason | e6dcd2d | 2008-07-17 12:53:50 -0400 | [diff] [blame] | 16 | #define EXTENT_ORDERED (1 << 9) |
| 17 | #define EXTENT_ORDERED_METADATA (1 << 10) |
Zheng Yan | 5b21f2e | 2008-09-26 10:05:38 -0400 | [diff] [blame] | 18 | #define EXTENT_BOUNDARY (1 << 11) |
Yan Zheng | 17d217f | 2008-12-12 10:03:38 -0500 | [diff] [blame] | 19 | #define EXTENT_NODATASUM (1 << 12) |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 20 | #define EXTENT_IOBITS (EXTENT_LOCKED | EXTENT_WRITEBACK) |
| 21 | |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 22 | /* flags for bio submission */ |
| 23 | #define EXTENT_BIO_COMPRESSED 1 |
| 24 | |
Chris Mason | b4ce94d | 2009-02-04 09:25:08 -0500 | [diff] [blame] | 25 | /* these are bit numbers for test/set bit */ |
| 26 | #define EXTENT_BUFFER_UPTODATE 0 |
| 27 | #define EXTENT_BUFFER_BLOCKING 1 |
Chris Mason | b947343 | 2009-03-13 11:00:37 -0400 | [diff] [blame] | 28 | #define EXTENT_BUFFER_DIRTY 2 |
Chris Mason | b4ce94d | 2009-02-04 09:25:08 -0500 | [diff] [blame] | 29 | |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 30 | /* |
| 31 | * page->private values. Every page that is controlled by the extent |
| 32 | * map has page->private set to one. |
| 33 | */ |
| 34 | #define EXTENT_PAGE_PRIVATE 1 |
| 35 | #define EXTENT_PAGE_PRIVATE_FIRST_PAGE 3 |
| 36 | |
Chris Mason | 70dec80 | 2008-01-29 09:59:12 -0500 | [diff] [blame] | 37 | struct extent_state; |
| 38 | |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 39 | typedef int (extent_submit_bio_hook_t)(struct inode *inode, int rw, |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 40 | struct bio *bio, int mirror_num, |
| 41 | unsigned long bio_flags); |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 42 | struct extent_io_ops { |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 43 | int (*fill_delalloc)(struct inode *inode, struct page *locked_page, |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 44 | u64 start, u64 end, int *page_started, |
| 45 | unsigned long *nr_written); |
Chris Mason | 247e743 | 2008-07-17 12:53:51 -0400 | [diff] [blame] | 46 | int (*writepage_start_hook)(struct page *page, u64 start, u64 end); |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 47 | int (*writepage_io_hook)(struct page *page, u64 start, u64 end); |
Chris Mason | 44b8bd7 | 2008-04-16 11:14:51 -0400 | [diff] [blame] | 48 | extent_submit_bio_hook_t *submit_bio_hook; |
Chris Mason | 239b14b | 2008-03-24 15:02:07 -0400 | [diff] [blame] | 49 | int (*merge_bio_hook)(struct page *page, unsigned long offset, |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 50 | size_t size, struct bio *bio, |
| 51 | unsigned long bio_flags); |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 52 | int (*readpage_io_hook)(struct page *page, u64 start, u64 end); |
Chris Mason | 7e38326 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 53 | int (*readpage_io_failed_hook)(struct bio *bio, struct page *page, |
| 54 | u64 start, u64 end, |
| 55 | struct extent_state *state); |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 56 | int (*writepage_io_failed_hook)(struct bio *bio, struct page *page, |
| 57 | u64 start, u64 end, |
| 58 | struct extent_state *state); |
Chris Mason | 70dec80 | 2008-01-29 09:59:12 -0500 | [diff] [blame] | 59 | int (*readpage_end_io_hook)(struct page *page, u64 start, u64 end, |
| 60 | struct extent_state *state); |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 61 | int (*writepage_end_io_hook)(struct page *page, u64 start, u64 end, |
Chris Mason | e6dcd2d | 2008-07-17 12:53:50 -0400 | [diff] [blame] | 62 | struct extent_state *state, int uptodate); |
Chris Mason | 291d673 | 2008-01-29 15:55:23 -0500 | [diff] [blame] | 63 | int (*set_bit_hook)(struct inode *inode, u64 start, u64 end, |
Chris Mason | b0c68f8 | 2008-01-31 11:05:37 -0500 | [diff] [blame] | 64 | unsigned long old, unsigned long bits); |
Chris Mason | 291d673 | 2008-01-29 15:55:23 -0500 | [diff] [blame] | 65 | int (*clear_bit_hook)(struct inode *inode, u64 start, u64 end, |
Chris Mason | b0c68f8 | 2008-01-31 11:05:37 -0500 | [diff] [blame] | 66 | unsigned long old, unsigned long bits); |
Chris Mason | 4bef084 | 2008-09-08 11:18:08 -0400 | [diff] [blame] | 67 | int (*write_cache_pages_lock_hook)(struct page *page); |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 68 | }; |
| 69 | |
| 70 | struct extent_io_tree { |
| 71 | struct rb_root state; |
Chris Mason | 6af118c | 2008-07-22 11:18:07 -0400 | [diff] [blame] | 72 | struct rb_root buffer; |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 73 | struct address_space *mapping; |
| 74 | u64 dirty_bytes; |
Chris Mason | 70dec80 | 2008-01-29 09:59:12 -0500 | [diff] [blame] | 75 | spinlock_t lock; |
Chris Mason | 6af118c | 2008-07-22 11:18:07 -0400 | [diff] [blame] | 76 | spinlock_t buffer_lock; |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 77 | struct extent_io_ops *ops; |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 78 | }; |
| 79 | |
| 80 | struct extent_state { |
| 81 | u64 start; |
| 82 | u64 end; /* inclusive */ |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 83 | struct rb_node rb_node; |
Chris Mason | 70dec80 | 2008-01-29 09:59:12 -0500 | [diff] [blame] | 84 | struct extent_io_tree *tree; |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 85 | wait_queue_head_t wq; |
| 86 | atomic_t refs; |
| 87 | unsigned long state; |
| 88 | |
| 89 | /* for use by the FS */ |
| 90 | u64 private; |
| 91 | |
Chris Mason | 2d2ae54 | 2008-03-26 16:24:23 -0400 | [diff] [blame] | 92 | struct list_head leak_list; |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 93 | }; |
| 94 | |
| 95 | struct extent_buffer { |
| 96 | u64 start; |
| 97 | unsigned long len; |
| 98 | char *map_token; |
| 99 | char *kaddr; |
| 100 | unsigned long map_start; |
| 101 | unsigned long map_len; |
| 102 | struct page *first_page; |
Chris Mason | b4ce94d | 2009-02-04 09:25:08 -0500 | [diff] [blame] | 103 | unsigned long bflags; |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 104 | atomic_t refs; |
Chris Mason | 2d2ae54 | 2008-03-26 16:24:23 -0400 | [diff] [blame] | 105 | struct list_head leak_list; |
Chris Mason | 6af118c | 2008-07-22 11:18:07 -0400 | [diff] [blame] | 106 | struct rb_node rb_node; |
Chris Mason | b4ce94d | 2009-02-04 09:25:08 -0500 | [diff] [blame] | 107 | |
| 108 | /* the spinlock is used to protect most operations */ |
| 109 | spinlock_t lock; |
| 110 | |
| 111 | /* |
| 112 | * when we keep the lock held while blocking, waiters go onto |
| 113 | * the wq |
| 114 | */ |
| 115 | wait_queue_head_t lock_wq; |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 116 | }; |
| 117 | |
| 118 | struct extent_map_tree; |
| 119 | |
Chris Mason | d7fc640 | 2008-02-18 12:12:38 -0500 | [diff] [blame] | 120 | static inline struct extent_state *extent_state_next(struct extent_state *state) |
| 121 | { |
| 122 | struct rb_node *node; |
| 123 | node = rb_next(&state->rb_node); |
| 124 | if (!node) |
| 125 | return NULL; |
| 126 | return rb_entry(node, struct extent_state, rb_node); |
| 127 | } |
| 128 | |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 129 | typedef struct extent_map *(get_extent_t)(struct inode *inode, |
| 130 | struct page *page, |
| 131 | size_t page_offset, |
| 132 | u64 start, u64 len, |
| 133 | int create); |
| 134 | |
| 135 | void extent_io_tree_init(struct extent_io_tree *tree, |
| 136 | struct address_space *mapping, gfp_t mask); |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 137 | int try_release_extent_mapping(struct extent_map_tree *map, |
Chris Mason | 70dec80 | 2008-01-29 09:59:12 -0500 | [diff] [blame] | 138 | struct extent_io_tree *tree, struct page *page, |
| 139 | gfp_t mask); |
Chris Mason | 6af118c | 2008-07-22 11:18:07 -0400 | [diff] [blame] | 140 | int try_release_extent_buffer(struct extent_io_tree *tree, struct page *page); |
Chris Mason | 7b13b7b | 2008-04-18 10:29:50 -0400 | [diff] [blame] | 141 | int try_release_extent_state(struct extent_map_tree *map, |
| 142 | struct extent_io_tree *tree, struct page *page, |
| 143 | gfp_t mask); |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 144 | int lock_extent(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask); |
| 145 | int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask); |
Josef Bacik | 2517920 | 2008-10-29 14:49:05 -0400 | [diff] [blame] | 146 | int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end, |
| 147 | gfp_t mask); |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 148 | int extent_read_full_page(struct extent_io_tree *tree, struct page *page, |
| 149 | get_extent_t *get_extent); |
| 150 | int __init extent_io_init(void); |
| 151 | void extent_io_exit(void); |
| 152 | |
| 153 | u64 count_range_bits(struct extent_io_tree *tree, |
| 154 | u64 *start, u64 search_end, |
| 155 | u64 max_bytes, unsigned long bits); |
| 156 | |
| 157 | int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end, |
| 158 | int bits, int filled); |
| 159 | int clear_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |
| 160 | int bits, gfp_t mask); |
Chris Mason | e6dcd2d | 2008-07-17 12:53:50 -0400 | [diff] [blame] | 161 | int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, |
| 162 | int bits, int wake, int delete, gfp_t mask); |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 163 | int set_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |
| 164 | int bits, gfp_t mask); |
| 165 | int set_extent_uptodate(struct extent_io_tree *tree, u64 start, u64 end, |
| 166 | gfp_t mask); |
| 167 | int set_extent_new(struct extent_io_tree *tree, u64 start, u64 end, |
| 168 | gfp_t mask); |
| 169 | int set_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end, |
| 170 | gfp_t mask); |
| 171 | int clear_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end, |
| 172 | gfp_t mask); |
Chris Mason | e6dcd2d | 2008-07-17 12:53:50 -0400 | [diff] [blame] | 173 | int clear_extent_ordered(struct extent_io_tree *tree, u64 start, u64 end, |
| 174 | gfp_t mask); |
| 175 | int clear_extent_ordered_metadata(struct extent_io_tree *tree, u64 start, |
| 176 | u64 end, gfp_t mask); |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 177 | int set_extent_delalloc(struct extent_io_tree *tree, u64 start, u64 end, |
| 178 | gfp_t mask); |
Chris Mason | e6dcd2d | 2008-07-17 12:53:50 -0400 | [diff] [blame] | 179 | int set_extent_ordered(struct extent_io_tree *tree, u64 start, u64 end, |
| 180 | gfp_t mask); |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 181 | int find_first_extent_bit(struct extent_io_tree *tree, u64 start, |
| 182 | u64 *start_ret, u64 *end_ret, int bits); |
Chris Mason | d7fc640 | 2008-02-18 12:12:38 -0500 | [diff] [blame] | 183 | struct extent_state *find_first_extent_bit_state(struct extent_io_tree *tree, |
| 184 | u64 start, int bits); |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 185 | int extent_invalidatepage(struct extent_io_tree *tree, |
| 186 | struct page *page, unsigned long offset); |
| 187 | int extent_write_full_page(struct extent_io_tree *tree, struct page *page, |
| 188 | get_extent_t *get_extent, |
| 189 | struct writeback_control *wbc); |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 190 | int extent_write_locked_range(struct extent_io_tree *tree, struct inode *inode, |
| 191 | u64 start, u64 end, get_extent_t *get_extent, |
| 192 | int mode); |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 193 | int extent_writepages(struct extent_io_tree *tree, |
| 194 | struct address_space *mapping, |
| 195 | get_extent_t *get_extent, |
| 196 | struct writeback_control *wbc); |
| 197 | int extent_readpages(struct extent_io_tree *tree, |
| 198 | struct address_space *mapping, |
| 199 | struct list_head *pages, unsigned nr_pages, |
| 200 | get_extent_t get_extent); |
| 201 | int extent_prepare_write(struct extent_io_tree *tree, |
| 202 | struct inode *inode, struct page *page, |
| 203 | unsigned from, unsigned to, get_extent_t *get_extent); |
| 204 | int extent_commit_write(struct extent_io_tree *tree, |
| 205 | struct inode *inode, struct page *page, |
| 206 | unsigned from, unsigned to); |
| 207 | sector_t extent_bmap(struct address_space *mapping, sector_t iblock, |
| 208 | get_extent_t *get_extent); |
Yehuda Sadeh | 1506fcc | 2009-01-21 14:39:14 -0500 | [diff] [blame] | 209 | int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
| 210 | __u64 start, __u64 len, get_extent_t *get_extent); |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 211 | int set_range_dirty(struct extent_io_tree *tree, u64 start, u64 end); |
| 212 | int set_state_private(struct extent_io_tree *tree, u64 start, u64 private); |
| 213 | int get_state_private(struct extent_io_tree *tree, u64 start, u64 *private); |
| 214 | void set_page_extent_mapped(struct page *page); |
| 215 | |
| 216 | struct extent_buffer *alloc_extent_buffer(struct extent_io_tree *tree, |
| 217 | u64 start, unsigned long len, |
| 218 | struct page *page0, |
| 219 | gfp_t mask); |
| 220 | struct extent_buffer *find_extent_buffer(struct extent_io_tree *tree, |
| 221 | u64 start, unsigned long len, |
| 222 | gfp_t mask); |
| 223 | void free_extent_buffer(struct extent_buffer *eb); |
| 224 | int read_extent_buffer_pages(struct extent_io_tree *tree, |
Chris Mason | a86c12c | 2008-02-07 10:50:54 -0500 | [diff] [blame] | 225 | struct extent_buffer *eb, u64 start, int wait, |
Chris Mason | f188591 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 226 | get_extent_t *get_extent, int mirror_num); |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 227 | |
| 228 | static inline void extent_buffer_get(struct extent_buffer *eb) |
| 229 | { |
| 230 | atomic_inc(&eb->refs); |
| 231 | } |
| 232 | |
| 233 | int memcmp_extent_buffer(struct extent_buffer *eb, const void *ptrv, |
| 234 | unsigned long start, |
| 235 | unsigned long len); |
| 236 | void read_extent_buffer(struct extent_buffer *eb, void *dst, |
| 237 | unsigned long start, |
| 238 | unsigned long len); |
| 239 | void write_extent_buffer(struct extent_buffer *eb, const void *src, |
| 240 | unsigned long start, unsigned long len); |
| 241 | void copy_extent_buffer(struct extent_buffer *dst, struct extent_buffer *src, |
| 242 | unsigned long dst_offset, unsigned long src_offset, |
| 243 | unsigned long len); |
| 244 | void memcpy_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset, |
| 245 | unsigned long src_offset, unsigned long len); |
| 246 | void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset, |
| 247 | unsigned long src_offset, unsigned long len); |
| 248 | void memset_extent_buffer(struct extent_buffer *eb, char c, |
| 249 | unsigned long start, unsigned long len); |
| 250 | int wait_on_extent_buffer_writeback(struct extent_io_tree *tree, |
| 251 | struct extent_buffer *eb); |
Chris Mason | e6dcd2d | 2008-07-17 12:53:50 -0400 | [diff] [blame] | 252 | int wait_on_extent_writeback(struct extent_io_tree *tree, u64 start, u64 end); |
| 253 | int wait_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, int bits); |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 254 | int clear_extent_buffer_dirty(struct extent_io_tree *tree, |
| 255 | struct extent_buffer *eb); |
| 256 | int set_extent_buffer_dirty(struct extent_io_tree *tree, |
| 257 | struct extent_buffer *eb); |
Chris Mason | b947343 | 2009-03-13 11:00:37 -0400 | [diff] [blame] | 258 | int test_extent_buffer_dirty(struct extent_io_tree *tree, |
| 259 | struct extent_buffer *eb); |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 260 | int set_extent_buffer_uptodate(struct extent_io_tree *tree, |
| 261 | struct extent_buffer *eb); |
Chris Mason | 1259ab7 | 2008-05-12 13:39:03 -0400 | [diff] [blame] | 262 | int clear_extent_buffer_uptodate(struct extent_io_tree *tree, |
| 263 | struct extent_buffer *eb); |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 264 | int extent_buffer_uptodate(struct extent_io_tree *tree, |
| 265 | struct extent_buffer *eb); |
| 266 | int map_extent_buffer(struct extent_buffer *eb, unsigned long offset, |
| 267 | unsigned long min_len, char **token, char **map, |
| 268 | unsigned long *map_start, |
| 269 | unsigned long *map_len, int km); |
| 270 | int map_private_extent_buffer(struct extent_buffer *eb, unsigned long offset, |
| 271 | unsigned long min_len, char **token, char **map, |
| 272 | unsigned long *map_start, |
| 273 | unsigned long *map_len, int km); |
| 274 | void unmap_extent_buffer(struct extent_buffer *eb, char *token, int km); |
Chris Mason | ce9adaa | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 275 | int release_extent_buffer_tail_pages(struct extent_buffer *eb); |
| 276 | int extent_range_uptodate(struct extent_io_tree *tree, |
| 277 | u64 start, u64 end); |
Chris Mason | c8b9781 | 2008-10-29 14:49:59 -0400 | [diff] [blame] | 278 | int extent_clear_unlock_delalloc(struct inode *inode, |
| 279 | struct extent_io_tree *tree, |
| 280 | u64 start, u64 end, struct page *locked_page, |
Chris Mason | 771ed68 | 2008-11-06 22:02:51 -0500 | [diff] [blame] | 281 | int unlock_page, |
| 282 | int clear_unlock, |
| 283 | int clear_delalloc, int clear_dirty, |
| 284 | int set_writeback, |
| 285 | int end_writeback); |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 286 | #endif |