4 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
5 * http://www.samsung.com/
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
12 #include <linux/f2fs_fs.h>
13 #include <linux/mpage.h>
14 #include <linux/backing-dev.h>
15 #include <linux/blkdev.h>
16 #include <linux/pagevec.h>
17 #include <linux/swap.h>
23 #include <trace/events/f2fs.h>
25 #define on_build_free_nids(nmi) mutex_is_locked(&nm_i->build_lock)
27 static struct kmem_cache
*nat_entry_slab
;
28 static struct kmem_cache
*free_nid_slab
;
29 static struct kmem_cache
*nat_entry_set_slab
;
31 bool available_free_memory(struct f2fs_sb_info
*sbi
, int type
)
33 struct f2fs_nm_info
*nm_i
= NM_I(sbi
);
35 unsigned long avail_ram
;
36 unsigned long mem_size
= 0;
41 /* only uses low memory */
42 avail_ram
= val
.totalram
- val
.totalhigh
;
45 * give 25%, 25%, 50%, 50%, 50% memory for each components respectively
47 if (type
== FREE_NIDS
) {
48 mem_size
= (nm_i
->fcnt
* sizeof(struct free_nid
)) >>
50 res
= mem_size
< ((avail_ram
* nm_i
->ram_thresh
/ 100) >> 2);
51 } else if (type
== NAT_ENTRIES
) {
52 mem_size
= (nm_i
->nat_cnt
* sizeof(struct nat_entry
)) >>
54 res
= mem_size
< ((avail_ram
* nm_i
->ram_thresh
/ 100) >> 2);
55 } else if (type
== DIRTY_DENTS
) {
56 if (sbi
->sb
->s_bdi
->wb
.dirty_exceeded
)
58 mem_size
= get_pages(sbi
, F2FS_DIRTY_DENTS
);
59 res
= mem_size
< ((avail_ram
* nm_i
->ram_thresh
/ 100) >> 1);
60 } else if (type
== INO_ENTRIES
) {
63 for (i
= 0; i
<= UPDATE_INO
; i
++)
64 mem_size
+= (sbi
->im
[i
].ino_num
*
65 sizeof(struct ino_entry
)) >> PAGE_CACHE_SHIFT
;
66 res
= mem_size
< ((avail_ram
* nm_i
->ram_thresh
/ 100) >> 1);
67 } else if (type
== EXTENT_CACHE
) {
68 mem_size
= (atomic_read(&sbi
->total_ext_tree
) *
69 sizeof(struct extent_tree
) +
70 atomic_read(&sbi
->total_ext_node
) *
71 sizeof(struct extent_node
)) >> PAGE_CACHE_SHIFT
;
72 res
= mem_size
< ((avail_ram
* nm_i
->ram_thresh
/ 100) >> 1);
74 if (sbi
->sb
->s_bdi
->wb
.dirty_exceeded
)
80 static void clear_node_page_dirty(struct page
*page
)
82 struct address_space
*mapping
= page
->mapping
;
83 unsigned int long flags
;
85 if (PageDirty(page
)) {
86 spin_lock_irqsave(&mapping
->tree_lock
, flags
);
87 radix_tree_tag_clear(&mapping
->page_tree
,
90 spin_unlock_irqrestore(&mapping
->tree_lock
, flags
);
92 clear_page_dirty_for_io(page
);
93 dec_page_count(F2FS_M_SB(mapping
), F2FS_DIRTY_NODES
);
95 ClearPageUptodate(page
);
98 static struct page
*get_current_nat_page(struct f2fs_sb_info
*sbi
, nid_t nid
)
100 pgoff_t index
= current_nat_addr(sbi
, nid
);
101 return get_meta_page(sbi
, index
);
104 static struct page
*get_next_nat_page(struct f2fs_sb_info
*sbi
, nid_t nid
)
106 struct page
*src_page
;
107 struct page
*dst_page
;
112 struct f2fs_nm_info
*nm_i
= NM_I(sbi
);
114 src_off
= current_nat_addr(sbi
, nid
);
115 dst_off
= next_nat_addr(sbi
, src_off
);
117 /* get current nat block page with lock */
118 src_page
= get_meta_page(sbi
, src_off
);
119 dst_page
= grab_meta_page(sbi
, dst_off
);
120 f2fs_bug_on(sbi
, PageDirty(src_page
));
122 src_addr
= page_address(src_page
);
123 dst_addr
= page_address(dst_page
);
124 memcpy(dst_addr
, src_addr
, PAGE_CACHE_SIZE
);
125 set_page_dirty(dst_page
);
126 f2fs_put_page(src_page
, 1);
128 set_to_next_nat(nm_i
, nid
);
133 static struct nat_entry
*__lookup_nat_cache(struct f2fs_nm_info
*nm_i
, nid_t n
)
135 return radix_tree_lookup(&nm_i
->nat_root
, n
);
138 static unsigned int __gang_lookup_nat_cache(struct f2fs_nm_info
*nm_i
,
139 nid_t start
, unsigned int nr
, struct nat_entry
**ep
)
141 return radix_tree_gang_lookup(&nm_i
->nat_root
, (void **)ep
, start
, nr
);
144 static void __del_from_nat_cache(struct f2fs_nm_info
*nm_i
, struct nat_entry
*e
)
147 radix_tree_delete(&nm_i
->nat_root
, nat_get_nid(e
));
149 kmem_cache_free(nat_entry_slab
, e
);
152 static void __set_nat_cache_dirty(struct f2fs_nm_info
*nm_i
,
153 struct nat_entry
*ne
)
155 nid_t set
= NAT_BLOCK_OFFSET(ne
->ni
.nid
);
156 struct nat_entry_set
*head
;
158 if (get_nat_flag(ne
, IS_DIRTY
))
161 head
= radix_tree_lookup(&nm_i
->nat_set_root
, set
);
163 head
= f2fs_kmem_cache_alloc(nat_entry_set_slab
, GFP_NOFS
);
165 INIT_LIST_HEAD(&head
->entry_list
);
166 INIT_LIST_HEAD(&head
->set_list
);
169 f2fs_radix_tree_insert(&nm_i
->nat_set_root
, set
, head
);
171 list_move_tail(&ne
->list
, &head
->entry_list
);
172 nm_i
->dirty_nat_cnt
++;
174 set_nat_flag(ne
, IS_DIRTY
, true);
177 static void __clear_nat_cache_dirty(struct f2fs_nm_info
*nm_i
,
178 struct nat_entry
*ne
)
180 nid_t set
= NAT_BLOCK_OFFSET(ne
->ni
.nid
);
181 struct nat_entry_set
*head
;
183 head
= radix_tree_lookup(&nm_i
->nat_set_root
, set
);
185 list_move_tail(&ne
->list
, &nm_i
->nat_entries
);
186 set_nat_flag(ne
, IS_DIRTY
, false);
188 nm_i
->dirty_nat_cnt
--;
192 static unsigned int __gang_lookup_nat_set(struct f2fs_nm_info
*nm_i
,
193 nid_t start
, unsigned int nr
, struct nat_entry_set
**ep
)
195 return radix_tree_gang_lookup(&nm_i
->nat_set_root
, (void **)ep
,
199 int need_dentry_mark(struct f2fs_sb_info
*sbi
, nid_t nid
)
201 struct f2fs_nm_info
*nm_i
= NM_I(sbi
);
205 down_read(&nm_i
->nat_tree_lock
);
206 e
= __lookup_nat_cache(nm_i
, nid
);
208 if (!get_nat_flag(e
, IS_CHECKPOINTED
) &&
209 !get_nat_flag(e
, HAS_FSYNCED_INODE
))
212 up_read(&nm_i
->nat_tree_lock
);
216 bool is_checkpointed_node(struct f2fs_sb_info
*sbi
, nid_t nid
)
218 struct f2fs_nm_info
*nm_i
= NM_I(sbi
);
222 down_read(&nm_i
->nat_tree_lock
);
223 e
= __lookup_nat_cache(nm_i
, nid
);
224 if (e
&& !get_nat_flag(e
, IS_CHECKPOINTED
))
226 up_read(&nm_i
->nat_tree_lock
);
230 bool need_inode_block_update(struct f2fs_sb_info
*sbi
, nid_t ino
)
232 struct f2fs_nm_info
*nm_i
= NM_I(sbi
);
234 bool need_update
= true;
236 down_read(&nm_i
->nat_tree_lock
);
237 e
= __lookup_nat_cache(nm_i
, ino
);
238 if (e
&& get_nat_flag(e
, HAS_LAST_FSYNC
) &&
239 (get_nat_flag(e
, IS_CHECKPOINTED
) ||
240 get_nat_flag(e
, HAS_FSYNCED_INODE
)))
242 up_read(&nm_i
->nat_tree_lock
);
246 static struct nat_entry
*grab_nat_entry(struct f2fs_nm_info
*nm_i
, nid_t nid
)
248 struct nat_entry
*new;
250 new = f2fs_kmem_cache_alloc(nat_entry_slab
, GFP_NOFS
);
251 f2fs_radix_tree_insert(&nm_i
->nat_root
, nid
, new);
252 memset(new, 0, sizeof(struct nat_entry
));
253 nat_set_nid(new, nid
);
255 list_add_tail(&new->list
, &nm_i
->nat_entries
);
260 static void cache_nat_entry(struct f2fs_nm_info
*nm_i
, nid_t nid
,
261 struct f2fs_nat_entry
*ne
)
265 e
= __lookup_nat_cache(nm_i
, nid
);
267 e
= grab_nat_entry(nm_i
, nid
);
268 node_info_from_raw_nat(&e
->ni
, ne
);
272 static void set_node_addr(struct f2fs_sb_info
*sbi
, struct node_info
*ni
,
273 block_t new_blkaddr
, bool fsync_done
)
275 struct f2fs_nm_info
*nm_i
= NM_I(sbi
);
278 down_write(&nm_i
->nat_tree_lock
);
279 e
= __lookup_nat_cache(nm_i
, ni
->nid
);
281 e
= grab_nat_entry(nm_i
, ni
->nid
);
282 copy_node_info(&e
->ni
, ni
);
283 f2fs_bug_on(sbi
, ni
->blk_addr
== NEW_ADDR
);
284 } else if (new_blkaddr
== NEW_ADDR
) {
286 * when nid is reallocated,
287 * previous nat entry can be remained in nat cache.
288 * So, reinitialize it with new information.
290 copy_node_info(&e
->ni
, ni
);
291 f2fs_bug_on(sbi
, ni
->blk_addr
!= NULL_ADDR
);
295 f2fs_bug_on(sbi
, nat_get_blkaddr(e
) != ni
->blk_addr
);
296 f2fs_bug_on(sbi
, nat_get_blkaddr(e
) == NULL_ADDR
&&
297 new_blkaddr
== NULL_ADDR
);
298 f2fs_bug_on(sbi
, nat_get_blkaddr(e
) == NEW_ADDR
&&
299 new_blkaddr
== NEW_ADDR
);
300 f2fs_bug_on(sbi
, nat_get_blkaddr(e
) != NEW_ADDR
&&
301 nat_get_blkaddr(e
) != NULL_ADDR
&&
302 new_blkaddr
== NEW_ADDR
);
304 /* increment version no as node is removed */
305 if (nat_get_blkaddr(e
) != NEW_ADDR
&& new_blkaddr
== NULL_ADDR
) {
306 unsigned char version
= nat_get_version(e
);
307 nat_set_version(e
, inc_node_version(version
));
309 /* in order to reuse the nid */
310 if (nm_i
->next_scan_nid
> ni
->nid
)
311 nm_i
->next_scan_nid
= ni
->nid
;
315 nat_set_blkaddr(e
, new_blkaddr
);
316 if (new_blkaddr
== NEW_ADDR
|| new_blkaddr
== NULL_ADDR
)
317 set_nat_flag(e
, IS_CHECKPOINTED
, false);
318 __set_nat_cache_dirty(nm_i
, e
);
320 /* update fsync_mark if its inode nat entry is still alive */
321 if (ni
->nid
!= ni
->ino
)
322 e
= __lookup_nat_cache(nm_i
, ni
->ino
);
324 if (fsync_done
&& ni
->nid
== ni
->ino
)
325 set_nat_flag(e
, HAS_FSYNCED_INODE
, true);
326 set_nat_flag(e
, HAS_LAST_FSYNC
, fsync_done
);
328 up_write(&nm_i
->nat_tree_lock
);
331 int try_to_free_nats(struct f2fs_sb_info
*sbi
, int nr_shrink
)
333 struct f2fs_nm_info
*nm_i
= NM_I(sbi
);
336 if (!down_write_trylock(&nm_i
->nat_tree_lock
))
339 while (nr_shrink
&& !list_empty(&nm_i
->nat_entries
)) {
340 struct nat_entry
*ne
;
341 ne
= list_first_entry(&nm_i
->nat_entries
,
342 struct nat_entry
, list
);
343 __del_from_nat_cache(nm_i
, ne
);
346 up_write(&nm_i
->nat_tree_lock
);
347 return nr
- nr_shrink
;
351 * This function always returns success
353 void get_node_info(struct f2fs_sb_info
*sbi
, nid_t nid
, struct node_info
*ni
)
355 struct f2fs_nm_info
*nm_i
= NM_I(sbi
);
356 struct curseg_info
*curseg
= CURSEG_I(sbi
, CURSEG_HOT_DATA
);
357 struct f2fs_summary_block
*sum
= curseg
->sum_blk
;
358 nid_t start_nid
= START_NID(nid
);
359 struct f2fs_nat_block
*nat_blk
;
360 struct page
*page
= NULL
;
361 struct f2fs_nat_entry ne
;
367 /* Check nat cache */
368 down_read(&nm_i
->nat_tree_lock
);
369 e
= __lookup_nat_cache(nm_i
, nid
);
371 ni
->ino
= nat_get_ino(e
);
372 ni
->blk_addr
= nat_get_blkaddr(e
);
373 ni
->version
= nat_get_version(e
);
375 up_read(&nm_i
->nat_tree_lock
);
379 memset(&ne
, 0, sizeof(struct f2fs_nat_entry
));
381 down_write(&nm_i
->nat_tree_lock
);
383 /* Check current segment summary */
384 mutex_lock(&curseg
->curseg_mutex
);
385 i
= lookup_journal_in_cursum(sum
, NAT_JOURNAL
, nid
, 0);
387 ne
= nat_in_journal(sum
, i
);
388 node_info_from_raw_nat(ni
, &ne
);
390 mutex_unlock(&curseg
->curseg_mutex
);
394 /* Fill node_info from nat page */
395 page
= get_current_nat_page(sbi
, start_nid
);
396 nat_blk
= (struct f2fs_nat_block
*)page_address(page
);
397 ne
= nat_blk
->entries
[nid
- start_nid
];
398 node_info_from_raw_nat(ni
, &ne
);
399 f2fs_put_page(page
, 1);
401 /* cache nat entry */
402 cache_nat_entry(NM_I(sbi
), nid
, &ne
);
403 up_write(&nm_i
->nat_tree_lock
);
407 * The maximum depth is four.
408 * Offset[0] will have raw inode offset.
410 static int get_node_path(struct f2fs_inode_info
*fi
, long block
,
411 int offset
[4], unsigned int noffset
[4])
413 const long direct_index
= ADDRS_PER_INODE(fi
);
414 const long direct_blks
= ADDRS_PER_BLOCK
;
415 const long dptrs_per_blk
= NIDS_PER_BLOCK
;
416 const long indirect_blks
= ADDRS_PER_BLOCK
* NIDS_PER_BLOCK
;
417 const long dindirect_blks
= indirect_blks
* NIDS_PER_BLOCK
;
423 if (block
< direct_index
) {
427 block
-= direct_index
;
428 if (block
< direct_blks
) {
429 offset
[n
++] = NODE_DIR1_BLOCK
;
435 block
-= direct_blks
;
436 if (block
< direct_blks
) {
437 offset
[n
++] = NODE_DIR2_BLOCK
;
443 block
-= direct_blks
;
444 if (block
< indirect_blks
) {
445 offset
[n
++] = NODE_IND1_BLOCK
;
447 offset
[n
++] = block
/ direct_blks
;
448 noffset
[n
] = 4 + offset
[n
- 1];
449 offset
[n
] = block
% direct_blks
;
453 block
-= indirect_blks
;
454 if (block
< indirect_blks
) {
455 offset
[n
++] = NODE_IND2_BLOCK
;
456 noffset
[n
] = 4 + dptrs_per_blk
;
457 offset
[n
++] = block
/ direct_blks
;
458 noffset
[n
] = 5 + dptrs_per_blk
+ offset
[n
- 1];
459 offset
[n
] = block
% direct_blks
;
463 block
-= indirect_blks
;
464 if (block
< dindirect_blks
) {
465 offset
[n
++] = NODE_DIND_BLOCK
;
466 noffset
[n
] = 5 + (dptrs_per_blk
* 2);
467 offset
[n
++] = block
/ indirect_blks
;
468 noffset
[n
] = 6 + (dptrs_per_blk
* 2) +
469 offset
[n
- 1] * (dptrs_per_blk
+ 1);
470 offset
[n
++] = (block
/ direct_blks
) % dptrs_per_blk
;
471 noffset
[n
] = 7 + (dptrs_per_blk
* 2) +
472 offset
[n
- 2] * (dptrs_per_blk
+ 1) +
474 offset
[n
] = block
% direct_blks
;
485 * Caller should call f2fs_put_dnode(dn).
486 * Also, it should grab and release a rwsem by calling f2fs_lock_op() and
487 * f2fs_unlock_op() only if ro is not set RDONLY_NODE.
488 * In the case of RDONLY_NODE, we don't need to care about mutex.
490 int get_dnode_of_data(struct dnode_of_data
*dn
, pgoff_t index
, int mode
)
492 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dn
->inode
);
493 struct page
*npage
[4];
494 struct page
*parent
= NULL
;
496 unsigned int noffset
[4];
501 level
= get_node_path(F2FS_I(dn
->inode
), index
, offset
, noffset
);
503 nids
[0] = dn
->inode
->i_ino
;
504 npage
[0] = dn
->inode_page
;
507 npage
[0] = get_node_page(sbi
, nids
[0]);
508 if (IS_ERR(npage
[0]))
509 return PTR_ERR(npage
[0]);
512 /* if inline_data is set, should not report any block indices */
513 if (f2fs_has_inline_data(dn
->inode
) && index
) {
515 f2fs_put_page(npage
[0], 1);
521 nids
[1] = get_nid(parent
, offset
[0], true);
522 dn
->inode_page
= npage
[0];
523 dn
->inode_page_locked
= true;
525 /* get indirect or direct nodes */
526 for (i
= 1; i
<= level
; i
++) {
529 if (!nids
[i
] && mode
== ALLOC_NODE
) {
531 if (!alloc_nid(sbi
, &(nids
[i
]))) {
537 npage
[i
] = new_node_page(dn
, noffset
[i
], NULL
);
538 if (IS_ERR(npage
[i
])) {
539 alloc_nid_failed(sbi
, nids
[i
]);
540 err
= PTR_ERR(npage
[i
]);
544 set_nid(parent
, offset
[i
- 1], nids
[i
], i
== 1);
545 alloc_nid_done(sbi
, nids
[i
]);
546 dn
->node_changed
= true;
548 } else if (mode
== LOOKUP_NODE_RA
&& i
== level
&& level
> 1) {
549 npage
[i
] = get_node_page_ra(parent
, offset
[i
- 1]);
550 if (IS_ERR(npage
[i
])) {
551 err
= PTR_ERR(npage
[i
]);
557 dn
->inode_page_locked
= false;
560 f2fs_put_page(parent
, 1);
564 npage
[i
] = get_node_page(sbi
, nids
[i
]);
565 if (IS_ERR(npage
[i
])) {
566 err
= PTR_ERR(npage
[i
]);
567 f2fs_put_page(npage
[0], 0);
573 nids
[i
+ 1] = get_nid(parent
, offset
[i
], false);
576 dn
->nid
= nids
[level
];
577 dn
->ofs_in_node
= offset
[level
];
578 dn
->node_page
= npage
[level
];
579 dn
->data_blkaddr
= datablock_addr(dn
->node_page
, dn
->ofs_in_node
);
583 f2fs_put_page(parent
, 1);
585 f2fs_put_page(npage
[0], 0);
587 dn
->inode_page
= NULL
;
588 dn
->node_page
= NULL
;
592 static void truncate_node(struct dnode_of_data
*dn
)
594 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dn
->inode
);
597 get_node_info(sbi
, dn
->nid
, &ni
);
598 if (dn
->inode
->i_blocks
== 0) {
599 f2fs_bug_on(sbi
, ni
.blk_addr
!= NULL_ADDR
);
602 f2fs_bug_on(sbi
, ni
.blk_addr
== NULL_ADDR
);
604 /* Deallocate node address */
605 invalidate_blocks(sbi
, ni
.blk_addr
);
606 dec_valid_node_count(sbi
, dn
->inode
);
607 set_node_addr(sbi
, &ni
, NULL_ADDR
, false);
609 if (dn
->nid
== dn
->inode
->i_ino
) {
610 remove_orphan_inode(sbi
, dn
->nid
);
611 dec_valid_inode_count(sbi
);
616 clear_node_page_dirty(dn
->node_page
);
617 set_sbi_flag(sbi
, SBI_IS_DIRTY
);
619 f2fs_put_page(dn
->node_page
, 1);
621 invalidate_mapping_pages(NODE_MAPPING(sbi
),
622 dn
->node_page
->index
, dn
->node_page
->index
);
624 dn
->node_page
= NULL
;
625 trace_f2fs_truncate_node(dn
->inode
, dn
->nid
, ni
.blk_addr
);
628 static int truncate_dnode(struct dnode_of_data
*dn
)
635 /* get direct node */
636 page
= get_node_page(F2FS_I_SB(dn
->inode
), dn
->nid
);
637 if (IS_ERR(page
) && PTR_ERR(page
) == -ENOENT
)
639 else if (IS_ERR(page
))
640 return PTR_ERR(page
);
642 /* Make dnode_of_data for parameter */
643 dn
->node_page
= page
;
645 truncate_data_blocks(dn
);
650 static int truncate_nodes(struct dnode_of_data
*dn
, unsigned int nofs
,
653 struct dnode_of_data rdn
= *dn
;
655 struct f2fs_node
*rn
;
657 unsigned int child_nofs
;
662 return NIDS_PER_BLOCK
+ 1;
664 trace_f2fs_truncate_nodes_enter(dn
->inode
, dn
->nid
, dn
->data_blkaddr
);
666 page
= get_node_page(F2FS_I_SB(dn
->inode
), dn
->nid
);
668 trace_f2fs_truncate_nodes_exit(dn
->inode
, PTR_ERR(page
));
669 return PTR_ERR(page
);
672 rn
= F2FS_NODE(page
);
674 for (i
= ofs
; i
< NIDS_PER_BLOCK
; i
++, freed
++) {
675 child_nid
= le32_to_cpu(rn
->in
.nid
[i
]);
679 ret
= truncate_dnode(&rdn
);
682 set_nid(page
, i
, 0, false);
683 dn
->node_changed
= true;
686 child_nofs
= nofs
+ ofs
* (NIDS_PER_BLOCK
+ 1) + 1;
687 for (i
= ofs
; i
< NIDS_PER_BLOCK
; i
++) {
688 child_nid
= le32_to_cpu(rn
->in
.nid
[i
]);
689 if (child_nid
== 0) {
690 child_nofs
+= NIDS_PER_BLOCK
+ 1;
694 ret
= truncate_nodes(&rdn
, child_nofs
, 0, depth
- 1);
695 if (ret
== (NIDS_PER_BLOCK
+ 1)) {
696 set_nid(page
, i
, 0, false);
697 dn
->node_changed
= true;
699 } else if (ret
< 0 && ret
!= -ENOENT
) {
707 /* remove current indirect node */
708 dn
->node_page
= page
;
712 f2fs_put_page(page
, 1);
714 trace_f2fs_truncate_nodes_exit(dn
->inode
, freed
);
718 f2fs_put_page(page
, 1);
719 trace_f2fs_truncate_nodes_exit(dn
->inode
, ret
);
723 static int truncate_partial_nodes(struct dnode_of_data
*dn
,
724 struct f2fs_inode
*ri
, int *offset
, int depth
)
726 struct page
*pages
[2];
733 nid
[0] = le32_to_cpu(ri
->i_nid
[offset
[0] - NODE_DIR1_BLOCK
]);
737 /* get indirect nodes in the path */
738 for (i
= 0; i
< idx
+ 1; i
++) {
739 /* reference count'll be increased */
740 pages
[i
] = get_node_page(F2FS_I_SB(dn
->inode
), nid
[i
]);
741 if (IS_ERR(pages
[i
])) {
742 err
= PTR_ERR(pages
[i
]);
746 nid
[i
+ 1] = get_nid(pages
[i
], offset
[i
+ 1], false);
749 /* free direct nodes linked to a partial indirect node */
750 for (i
= offset
[idx
+ 1]; i
< NIDS_PER_BLOCK
; i
++) {
751 child_nid
= get_nid(pages
[idx
], i
, false);
755 err
= truncate_dnode(dn
);
758 set_nid(pages
[idx
], i
, 0, false);
759 dn
->node_changed
= true;
762 if (offset
[idx
+ 1] == 0) {
763 dn
->node_page
= pages
[idx
];
767 f2fs_put_page(pages
[idx
], 1);
773 for (i
= idx
; i
>= 0; i
--)
774 f2fs_put_page(pages
[i
], 1);
776 trace_f2fs_truncate_partial_nodes(dn
->inode
, nid
, depth
, err
);
782 * All the block addresses of data and nodes should be nullified.
784 int truncate_inode_blocks(struct inode
*inode
, pgoff_t from
)
786 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
787 int err
= 0, cont
= 1;
788 int level
, offset
[4], noffset
[4];
789 unsigned int nofs
= 0;
790 struct f2fs_inode
*ri
;
791 struct dnode_of_data dn
;
794 trace_f2fs_truncate_inode_blocks_enter(inode
, from
);
796 level
= get_node_path(F2FS_I(inode
), from
, offset
, noffset
);
798 page
= get_node_page(sbi
, inode
->i_ino
);
800 trace_f2fs_truncate_inode_blocks_exit(inode
, PTR_ERR(page
));
801 return PTR_ERR(page
);
804 set_new_dnode(&dn
, inode
, page
, NULL
, 0);
807 ri
= F2FS_INODE(page
);
815 if (!offset
[level
- 1])
817 err
= truncate_partial_nodes(&dn
, ri
, offset
, level
);
818 if (err
< 0 && err
!= -ENOENT
)
820 nofs
+= 1 + NIDS_PER_BLOCK
;
823 nofs
= 5 + 2 * NIDS_PER_BLOCK
;
824 if (!offset
[level
- 1])
826 err
= truncate_partial_nodes(&dn
, ri
, offset
, level
);
827 if (err
< 0 && err
!= -ENOENT
)
836 dn
.nid
= le32_to_cpu(ri
->i_nid
[offset
[0] - NODE_DIR1_BLOCK
]);
838 case NODE_DIR1_BLOCK
:
839 case NODE_DIR2_BLOCK
:
840 err
= truncate_dnode(&dn
);
843 case NODE_IND1_BLOCK
:
844 case NODE_IND2_BLOCK
:
845 err
= truncate_nodes(&dn
, nofs
, offset
[1], 2);
848 case NODE_DIND_BLOCK
:
849 err
= truncate_nodes(&dn
, nofs
, offset
[1], 3);
856 if (err
< 0 && err
!= -ENOENT
)
858 if (offset
[1] == 0 &&
859 ri
->i_nid
[offset
[0] - NODE_DIR1_BLOCK
]) {
861 if (unlikely(page
->mapping
!= NODE_MAPPING(sbi
))) {
862 f2fs_put_page(page
, 1);
865 f2fs_wait_on_page_writeback(page
, NODE
);
866 ri
->i_nid
[offset
[0] - NODE_DIR1_BLOCK
] = 0;
867 set_page_dirty(page
);
875 f2fs_put_page(page
, 0);
876 trace_f2fs_truncate_inode_blocks_exit(inode
, err
);
877 return err
> 0 ? 0 : err
;
880 int truncate_xattr_node(struct inode
*inode
, struct page
*page
)
882 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
883 nid_t nid
= F2FS_I(inode
)->i_xattr_nid
;
884 struct dnode_of_data dn
;
890 npage
= get_node_page(sbi
, nid
);
892 return PTR_ERR(npage
);
894 F2FS_I(inode
)->i_xattr_nid
= 0;
896 /* need to do checkpoint during fsync */
897 F2FS_I(inode
)->xattr_ver
= cur_cp_version(F2FS_CKPT(sbi
));
899 set_new_dnode(&dn
, inode
, page
, npage
, nid
);
902 dn
.inode_page_locked
= true;
908 * Caller should grab and release a rwsem by calling f2fs_lock_op() and
911 int remove_inode_page(struct inode
*inode
)
913 struct dnode_of_data dn
;
916 set_new_dnode(&dn
, inode
, NULL
, NULL
, inode
->i_ino
);
917 err
= get_dnode_of_data(&dn
, 0, LOOKUP_NODE
);
921 err
= truncate_xattr_node(inode
, dn
.inode_page
);
927 /* remove potential inline_data blocks */
928 if (S_ISREG(inode
->i_mode
) || S_ISDIR(inode
->i_mode
) ||
929 S_ISLNK(inode
->i_mode
))
930 truncate_data_blocks_range(&dn
, 1);
932 /* 0 is possible, after f2fs_new_inode() has failed */
933 f2fs_bug_on(F2FS_I_SB(inode
),
934 inode
->i_blocks
!= 0 && inode
->i_blocks
!= 1);
936 /* will put inode & node pages */
941 struct page
*new_inode_page(struct inode
*inode
)
943 struct dnode_of_data dn
;
945 /* allocate inode page for new inode */
946 set_new_dnode(&dn
, inode
, NULL
, NULL
, inode
->i_ino
);
948 /* caller should f2fs_put_page(page, 1); */
949 return new_node_page(&dn
, 0, NULL
);
952 struct page
*new_node_page(struct dnode_of_data
*dn
,
953 unsigned int ofs
, struct page
*ipage
)
955 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dn
->inode
);
956 struct node_info old_ni
, new_ni
;
960 if (unlikely(is_inode_flag_set(F2FS_I(dn
->inode
), FI_NO_ALLOC
)))
961 return ERR_PTR(-EPERM
);
963 page
= grab_cache_page(NODE_MAPPING(sbi
), dn
->nid
);
965 return ERR_PTR(-ENOMEM
);
967 if (unlikely(!inc_valid_node_count(sbi
, dn
->inode
))) {
972 get_node_info(sbi
, dn
->nid
, &old_ni
);
974 /* Reinitialize old_ni with new node page */
975 f2fs_bug_on(sbi
, old_ni
.blk_addr
!= NULL_ADDR
);
977 new_ni
.ino
= dn
->inode
->i_ino
;
978 set_node_addr(sbi
, &new_ni
, NEW_ADDR
, false);
980 f2fs_wait_on_page_writeback(page
, NODE
);
981 fill_node_footer(page
, dn
->nid
, dn
->inode
->i_ino
, ofs
, true);
982 set_cold_node(dn
->inode
, page
);
983 SetPageUptodate(page
);
984 set_page_dirty(page
);
986 if (f2fs_has_xattr_block(ofs
))
987 F2FS_I(dn
->inode
)->i_xattr_nid
= dn
->nid
;
989 dn
->node_page
= page
;
991 update_inode(dn
->inode
, ipage
);
995 inc_valid_inode_count(sbi
);
1000 clear_node_page_dirty(page
);
1001 f2fs_put_page(page
, 1);
1002 return ERR_PTR(err
);
1006 * Caller should do after getting the following values.
1007 * 0: f2fs_put_page(page, 0)
1008 * LOCKED_PAGE or error: f2fs_put_page(page, 1)
1010 static int read_node_page(struct page
*page
, int rw
)
1012 struct f2fs_sb_info
*sbi
= F2FS_P_SB(page
);
1013 struct node_info ni
;
1014 struct f2fs_io_info fio
= {
1019 .encrypted_page
= NULL
,
1022 get_node_info(sbi
, page
->index
, &ni
);
1024 if (unlikely(ni
.blk_addr
== NULL_ADDR
)) {
1025 ClearPageUptodate(page
);
1029 if (PageUptodate(page
))
1032 fio
.blk_addr
= ni
.blk_addr
;
1033 return f2fs_submit_page_bio(&fio
);
1037 * Readahead a node page
1039 void ra_node_page(struct f2fs_sb_info
*sbi
, nid_t nid
)
1046 f2fs_bug_on(sbi
, check_nid_range(sbi
, nid
));
1048 apage
= find_get_page(NODE_MAPPING(sbi
), nid
);
1049 if (apage
&& PageUptodate(apage
)) {
1050 f2fs_put_page(apage
, 0);
1053 f2fs_put_page(apage
, 0);
1055 apage
= grab_cache_page(NODE_MAPPING(sbi
), nid
);
1059 err
= read_node_page(apage
, READA
);
1060 f2fs_put_page(apage
, err
? 1 : 0);
1064 * readahead MAX_RA_NODE number of node pages.
1066 void ra_node_pages(struct page
*parent
, int start
)
1068 struct f2fs_sb_info
*sbi
= F2FS_P_SB(parent
);
1069 struct blk_plug plug
;
1073 blk_start_plug(&plug
);
1075 /* Then, try readahead for siblings of the desired node */
1076 end
= start
+ MAX_RA_NODE
;
1077 end
= min(end
, NIDS_PER_BLOCK
);
1078 for (i
= start
; i
< end
; i
++) {
1079 nid
= get_nid(parent
, i
, false);
1080 ra_node_page(sbi
, nid
);
1083 blk_finish_plug(&plug
);
1086 struct page
*__get_node_page(struct f2fs_sb_info
*sbi
, pgoff_t nid
,
1087 struct page
*parent
, int start
)
1093 return ERR_PTR(-ENOENT
);
1094 f2fs_bug_on(sbi
, check_nid_range(sbi
, nid
));
1096 page
= grab_cache_page(NODE_MAPPING(sbi
), nid
);
1098 return ERR_PTR(-ENOMEM
);
1100 err
= read_node_page(page
, READ_SYNC
);
1102 f2fs_put_page(page
, 1);
1103 return ERR_PTR(err
);
1104 } else if (err
== LOCKED_PAGE
) {
1109 ra_node_pages(parent
, start
+ 1);
1113 if (unlikely(!PageUptodate(page
))) {
1114 f2fs_put_page(page
, 1);
1115 return ERR_PTR(-EIO
);
1117 if (unlikely(page
->mapping
!= NODE_MAPPING(sbi
))) {
1118 f2fs_put_page(page
, 1);
1122 f2fs_bug_on(sbi
, nid
!= nid_of_node(page
));
1126 struct page
*get_node_page(struct f2fs_sb_info
*sbi
, pgoff_t nid
)
1128 return __get_node_page(sbi
, nid
, NULL
, 0);
1131 struct page
*get_node_page_ra(struct page
*parent
, int start
)
1133 struct f2fs_sb_info
*sbi
= F2FS_P_SB(parent
);
1134 nid_t nid
= get_nid(parent
, start
, false);
1136 return __get_node_page(sbi
, nid
, parent
, start
);
1139 void sync_inode_page(struct dnode_of_data
*dn
)
1141 if (IS_INODE(dn
->node_page
) || dn
->inode_page
== dn
->node_page
) {
1142 update_inode(dn
->inode
, dn
->node_page
);
1143 } else if (dn
->inode_page
) {
1144 if (!dn
->inode_page_locked
)
1145 lock_page(dn
->inode_page
);
1146 update_inode(dn
->inode
, dn
->inode_page
);
1147 if (!dn
->inode_page_locked
)
1148 unlock_page(dn
->inode_page
);
1150 update_inode_page(dn
->inode
);
1152 dn
->node_changed
= true;
1155 int sync_node_pages(struct f2fs_sb_info
*sbi
, nid_t ino
,
1156 struct writeback_control
*wbc
)
1159 struct pagevec pvec
;
1160 int step
= ino
? 2 : 0;
1161 int nwritten
= 0, wrote
= 0;
1163 pagevec_init(&pvec
, 0);
1169 while (index
<= end
) {
1171 nr_pages
= pagevec_lookup_tag(&pvec
, NODE_MAPPING(sbi
), &index
,
1172 PAGECACHE_TAG_DIRTY
,
1173 min(end
- index
, (pgoff_t
)PAGEVEC_SIZE
-1) + 1);
1177 for (i
= 0; i
< nr_pages
; i
++) {
1178 struct page
*page
= pvec
.pages
[i
];
1180 if (unlikely(f2fs_cp_error(sbi
))) {
1181 pagevec_release(&pvec
);
1186 * flushing sequence with step:
1191 if (step
== 0 && IS_DNODE(page
))
1193 if (step
== 1 && (!IS_DNODE(page
) ||
1194 is_cold_node(page
)))
1196 if (step
== 2 && (!IS_DNODE(page
) ||
1197 !is_cold_node(page
)))
1202 * we should not skip writing node pages.
1204 if (ino
&& ino_of_node(page
) == ino
)
1206 else if (!trylock_page(page
))
1209 if (unlikely(page
->mapping
!= NODE_MAPPING(sbi
))) {
1214 if (ino
&& ino_of_node(page
) != ino
)
1215 goto continue_unlock
;
1217 if (!PageDirty(page
)) {
1218 /* someone wrote it for us */
1219 goto continue_unlock
;
1222 if (!clear_page_dirty_for_io(page
))
1223 goto continue_unlock
;
1225 /* called by fsync() */
1226 if (ino
&& IS_DNODE(page
)) {
1227 set_fsync_mark(page
, 1);
1229 set_dentry_mark(page
,
1230 need_dentry_mark(sbi
, ino
));
1233 set_fsync_mark(page
, 0);
1234 set_dentry_mark(page
, 0);
1237 if (NODE_MAPPING(sbi
)->a_ops
->writepage(page
, wbc
))
1242 if (--wbc
->nr_to_write
== 0)
1245 pagevec_release(&pvec
);
1248 if (wbc
->nr_to_write
== 0) {
1260 f2fs_submit_merged_bio(sbi
, NODE
, WRITE
);
1264 int wait_on_node_pages_writeback(struct f2fs_sb_info
*sbi
, nid_t ino
)
1266 pgoff_t index
= 0, end
= LONG_MAX
;
1267 struct pagevec pvec
;
1268 int ret2
= 0, ret
= 0;
1270 pagevec_init(&pvec
, 0);
1272 while (index
<= end
) {
1274 nr_pages
= pagevec_lookup_tag(&pvec
, NODE_MAPPING(sbi
), &index
,
1275 PAGECACHE_TAG_WRITEBACK
,
1276 min(end
- index
, (pgoff_t
)PAGEVEC_SIZE
-1) + 1);
1280 for (i
= 0; i
< nr_pages
; i
++) {
1281 struct page
*page
= pvec
.pages
[i
];
1283 /* until radix tree lookup accepts end_index */
1284 if (unlikely(page
->index
> end
))
1287 if (ino
&& ino_of_node(page
) == ino
) {
1288 f2fs_wait_on_page_writeback(page
, NODE
);
1289 if (TestClearPageError(page
))
1293 pagevec_release(&pvec
);
1297 if (unlikely(test_and_clear_bit(AS_ENOSPC
, &NODE_MAPPING(sbi
)->flags
)))
1299 if (unlikely(test_and_clear_bit(AS_EIO
, &NODE_MAPPING(sbi
)->flags
)))
1306 static int f2fs_write_node_page(struct page
*page
,
1307 struct writeback_control
*wbc
)
1309 struct f2fs_sb_info
*sbi
= F2FS_P_SB(page
);
1311 struct node_info ni
;
1312 struct f2fs_io_info fio
= {
1315 .rw
= (wbc
->sync_mode
== WB_SYNC_ALL
) ? WRITE_SYNC
: WRITE
,
1317 .encrypted_page
= NULL
,
1320 trace_f2fs_writepage(page
, NODE
);
1322 if (unlikely(is_sbi_flag_set(sbi
, SBI_POR_DOING
)))
1324 if (unlikely(f2fs_cp_error(sbi
)))
1327 f2fs_wait_on_page_writeback(page
, NODE
);
1329 /* get old block addr of this node page */
1330 nid
= nid_of_node(page
);
1331 f2fs_bug_on(sbi
, page
->index
!= nid
);
1333 if (wbc
->for_reclaim
) {
1334 if (!down_read_trylock(&sbi
->node_write
))
1337 down_read(&sbi
->node_write
);
1340 get_node_info(sbi
, nid
, &ni
);
1342 /* This page is already truncated */
1343 if (unlikely(ni
.blk_addr
== NULL_ADDR
)) {
1344 ClearPageUptodate(page
);
1345 dec_page_count(sbi
, F2FS_DIRTY_NODES
);
1346 up_read(&sbi
->node_write
);
1351 set_page_writeback(page
);
1352 fio
.blk_addr
= ni
.blk_addr
;
1353 write_node_page(nid
, &fio
);
1354 set_node_addr(sbi
, &ni
, fio
.blk_addr
, is_fsync_dnode(page
));
1355 dec_page_count(sbi
, F2FS_DIRTY_NODES
);
1356 up_read(&sbi
->node_write
);
1359 if (wbc
->for_reclaim
|| unlikely(f2fs_cp_error(sbi
)))
1360 f2fs_submit_merged_bio(sbi
, NODE
, WRITE
);
1365 redirty_page_for_writepage(wbc
, page
);
1366 return AOP_WRITEPAGE_ACTIVATE
;
1369 static int f2fs_write_node_pages(struct address_space
*mapping
,
1370 struct writeback_control
*wbc
)
1372 struct f2fs_sb_info
*sbi
= F2FS_M_SB(mapping
);
1375 trace_f2fs_writepages(mapping
->host
, wbc
, NODE
);
1377 /* balancing f2fs's metadata in background */
1378 f2fs_balance_fs_bg(sbi
);
1380 /* collect a number of dirty node pages and write together */
1381 if (get_pages(sbi
, F2FS_DIRTY_NODES
) < nr_pages_to_skip(sbi
, NODE
))
1384 diff
= nr_pages_to_write(sbi
, NODE
, wbc
);
1385 wbc
->sync_mode
= WB_SYNC_NONE
;
1386 sync_node_pages(sbi
, 0, wbc
);
1387 wbc
->nr_to_write
= max((long)0, wbc
->nr_to_write
- diff
);
1391 wbc
->pages_skipped
+= get_pages(sbi
, F2FS_DIRTY_NODES
);
1395 static int f2fs_set_node_page_dirty(struct page
*page
)
1397 trace_f2fs_set_page_dirty(page
, NODE
);
1399 SetPageUptodate(page
);
1400 if (!PageDirty(page
)) {
1401 __set_page_dirty_nobuffers(page
);
1402 inc_page_count(F2FS_P_SB(page
), F2FS_DIRTY_NODES
);
1403 SetPagePrivate(page
);
1404 f2fs_trace_pid(page
);
1411 * Structure of the f2fs node operations
1413 const struct address_space_operations f2fs_node_aops
= {
1414 .writepage
= f2fs_write_node_page
,
1415 .writepages
= f2fs_write_node_pages
,
1416 .set_page_dirty
= f2fs_set_node_page_dirty
,
1417 .invalidatepage
= f2fs_invalidate_page
,
1418 .releasepage
= f2fs_release_page
,
1421 static struct free_nid
*__lookup_free_nid_list(struct f2fs_nm_info
*nm_i
,
1424 return radix_tree_lookup(&nm_i
->free_nid_root
, n
);
1427 static void __del_from_free_nid_list(struct f2fs_nm_info
*nm_i
,
1431 radix_tree_delete(&nm_i
->free_nid_root
, i
->nid
);
1434 static int add_free_nid(struct f2fs_sb_info
*sbi
, nid_t nid
, bool build
)
1436 struct f2fs_nm_info
*nm_i
= NM_I(sbi
);
1438 struct nat_entry
*ne
;
1439 bool allocated
= false;
1441 if (!available_free_memory(sbi
, FREE_NIDS
))
1444 /* 0 nid should not be used */
1445 if (unlikely(nid
== 0))
1449 /* do not add allocated nids */
1450 ne
= __lookup_nat_cache(nm_i
, nid
);
1451 if (ne
&& (!get_nat_flag(ne
, IS_CHECKPOINTED
) ||
1452 nat_get_blkaddr(ne
) != NULL_ADDR
))
1458 i
= f2fs_kmem_cache_alloc(free_nid_slab
, GFP_NOFS
);
1462 if (radix_tree_preload(GFP_NOFS
)) {
1463 kmem_cache_free(free_nid_slab
, i
);
1467 spin_lock(&nm_i
->free_nid_list_lock
);
1468 if (radix_tree_insert(&nm_i
->free_nid_root
, i
->nid
, i
)) {
1469 spin_unlock(&nm_i
->free_nid_list_lock
);
1470 radix_tree_preload_end();
1471 kmem_cache_free(free_nid_slab
, i
);
1474 list_add_tail(&i
->list
, &nm_i
->free_nid_list
);
1476 spin_unlock(&nm_i
->free_nid_list_lock
);
1477 radix_tree_preload_end();
1481 static void remove_free_nid(struct f2fs_nm_info
*nm_i
, nid_t nid
)
1484 bool need_free
= false;
1486 spin_lock(&nm_i
->free_nid_list_lock
);
1487 i
= __lookup_free_nid_list(nm_i
, nid
);
1488 if (i
&& i
->state
== NID_NEW
) {
1489 __del_from_free_nid_list(nm_i
, i
);
1493 spin_unlock(&nm_i
->free_nid_list_lock
);
1496 kmem_cache_free(free_nid_slab
, i
);
1499 static void scan_nat_page(struct f2fs_sb_info
*sbi
,
1500 struct page
*nat_page
, nid_t start_nid
)
1502 struct f2fs_nm_info
*nm_i
= NM_I(sbi
);
1503 struct f2fs_nat_block
*nat_blk
= page_address(nat_page
);
1507 i
= start_nid
% NAT_ENTRY_PER_BLOCK
;
1509 for (; i
< NAT_ENTRY_PER_BLOCK
; i
++, start_nid
++) {
1511 if (unlikely(start_nid
>= nm_i
->max_nid
))
1514 blk_addr
= le32_to_cpu(nat_blk
->entries
[i
].block_addr
);
1515 f2fs_bug_on(sbi
, blk_addr
== NEW_ADDR
);
1516 if (blk_addr
== NULL_ADDR
) {
1517 if (add_free_nid(sbi
, start_nid
, true) < 0)
1523 static void build_free_nids(struct f2fs_sb_info
*sbi
)
1525 struct f2fs_nm_info
*nm_i
= NM_I(sbi
);
1526 struct curseg_info
*curseg
= CURSEG_I(sbi
, CURSEG_HOT_DATA
);
1527 struct f2fs_summary_block
*sum
= curseg
->sum_blk
;
1529 nid_t nid
= nm_i
->next_scan_nid
;
1531 /* Enough entries */
1532 if (nm_i
->fcnt
> NAT_ENTRY_PER_BLOCK
)
1535 /* readahead nat pages to be scanned */
1536 ra_meta_pages(sbi
, NAT_BLOCK_OFFSET(nid
), FREE_NID_PAGES
,
1539 down_read(&nm_i
->nat_tree_lock
);
1542 struct page
*page
= get_current_nat_page(sbi
, nid
);
1544 scan_nat_page(sbi
, page
, nid
);
1545 f2fs_put_page(page
, 1);
1547 nid
+= (NAT_ENTRY_PER_BLOCK
- (nid
% NAT_ENTRY_PER_BLOCK
));
1548 if (unlikely(nid
>= nm_i
->max_nid
))
1551 if (++i
>= FREE_NID_PAGES
)
1555 /* go to the next free nat pages to find free nids abundantly */
1556 nm_i
->next_scan_nid
= nid
;
1558 /* find free nids from current sum_pages */
1559 mutex_lock(&curseg
->curseg_mutex
);
1560 for (i
= 0; i
< nats_in_cursum(sum
); i
++) {
1561 block_t addr
= le32_to_cpu(nat_in_journal(sum
, i
).block_addr
);
1562 nid
= le32_to_cpu(nid_in_journal(sum
, i
));
1563 if (addr
== NULL_ADDR
)
1564 add_free_nid(sbi
, nid
, true);
1566 remove_free_nid(nm_i
, nid
);
1568 mutex_unlock(&curseg
->curseg_mutex
);
1569 up_read(&nm_i
->nat_tree_lock
);
1571 ra_meta_pages(sbi
, NAT_BLOCK_OFFSET(nm_i
->next_scan_nid
),
1572 nm_i
->ra_nid_pages
, META_NAT
, false);
1576 * If this function returns success, caller can obtain a new nid
1577 * from second parameter of this function.
1578 * The returned nid could be used ino as well as nid when inode is created.
1580 bool alloc_nid(struct f2fs_sb_info
*sbi
, nid_t
*nid
)
1582 struct f2fs_nm_info
*nm_i
= NM_I(sbi
);
1583 struct free_nid
*i
= NULL
;
1585 if (unlikely(sbi
->total_valid_node_count
+ 1 > nm_i
->available_nids
))
1588 spin_lock(&nm_i
->free_nid_list_lock
);
1590 /* We should not use stale free nids created by build_free_nids */
1591 if (nm_i
->fcnt
&& !on_build_free_nids(nm_i
)) {
1592 f2fs_bug_on(sbi
, list_empty(&nm_i
->free_nid_list
));
1593 list_for_each_entry(i
, &nm_i
->free_nid_list
, list
)
1594 if (i
->state
== NID_NEW
)
1597 f2fs_bug_on(sbi
, i
->state
!= NID_NEW
);
1599 i
->state
= NID_ALLOC
;
1601 spin_unlock(&nm_i
->free_nid_list_lock
);
1604 spin_unlock(&nm_i
->free_nid_list_lock
);
1606 /* Let's scan nat pages and its caches to get free nids */
1607 mutex_lock(&nm_i
->build_lock
);
1608 build_free_nids(sbi
);
1609 mutex_unlock(&nm_i
->build_lock
);
1614 * alloc_nid() should be called prior to this function.
1616 void alloc_nid_done(struct f2fs_sb_info
*sbi
, nid_t nid
)
1618 struct f2fs_nm_info
*nm_i
= NM_I(sbi
);
1621 spin_lock(&nm_i
->free_nid_list_lock
);
1622 i
= __lookup_free_nid_list(nm_i
, nid
);
1623 f2fs_bug_on(sbi
, !i
|| i
->state
!= NID_ALLOC
);
1624 __del_from_free_nid_list(nm_i
, i
);
1625 spin_unlock(&nm_i
->free_nid_list_lock
);
1627 kmem_cache_free(free_nid_slab
, i
);
1631 * alloc_nid() should be called prior to this function.
1633 void alloc_nid_failed(struct f2fs_sb_info
*sbi
, nid_t nid
)
1635 struct f2fs_nm_info
*nm_i
= NM_I(sbi
);
1637 bool need_free
= false;
1642 spin_lock(&nm_i
->free_nid_list_lock
);
1643 i
= __lookup_free_nid_list(nm_i
, nid
);
1644 f2fs_bug_on(sbi
, !i
|| i
->state
!= NID_ALLOC
);
1645 if (!available_free_memory(sbi
, FREE_NIDS
)) {
1646 __del_from_free_nid_list(nm_i
, i
);
1652 spin_unlock(&nm_i
->free_nid_list_lock
);
1655 kmem_cache_free(free_nid_slab
, i
);
1658 int try_to_free_nids(struct f2fs_sb_info
*sbi
, int nr_shrink
)
1660 struct f2fs_nm_info
*nm_i
= NM_I(sbi
);
1661 struct free_nid
*i
, *next
;
1664 if (!mutex_trylock(&nm_i
->build_lock
))
1667 spin_lock(&nm_i
->free_nid_list_lock
);
1668 list_for_each_entry_safe(i
, next
, &nm_i
->free_nid_list
, list
) {
1669 if (nr_shrink
<= 0 || nm_i
->fcnt
<= NAT_ENTRY_PER_BLOCK
)
1671 if (i
->state
== NID_ALLOC
)
1673 __del_from_free_nid_list(nm_i
, i
);
1674 kmem_cache_free(free_nid_slab
, i
);
1678 spin_unlock(&nm_i
->free_nid_list_lock
);
1679 mutex_unlock(&nm_i
->build_lock
);
1681 return nr
- nr_shrink
;
1684 void recover_inline_xattr(struct inode
*inode
, struct page
*page
)
1686 void *src_addr
, *dst_addr
;
1689 struct f2fs_inode
*ri
;
1691 ipage
= get_node_page(F2FS_I_SB(inode
), inode
->i_ino
);
1692 f2fs_bug_on(F2FS_I_SB(inode
), IS_ERR(ipage
));
1694 ri
= F2FS_INODE(page
);
1695 if (!(ri
->i_inline
& F2FS_INLINE_XATTR
)) {
1696 clear_inode_flag(F2FS_I(inode
), FI_INLINE_XATTR
);
1700 dst_addr
= inline_xattr_addr(ipage
);
1701 src_addr
= inline_xattr_addr(page
);
1702 inline_size
= inline_xattr_size(inode
);
1704 f2fs_wait_on_page_writeback(ipage
, NODE
);
1705 memcpy(dst_addr
, src_addr
, inline_size
);
1707 update_inode(inode
, ipage
);
1708 f2fs_put_page(ipage
, 1);
1711 void recover_xattr_data(struct inode
*inode
, struct page
*page
, block_t blkaddr
)
1713 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
1714 nid_t prev_xnid
= F2FS_I(inode
)->i_xattr_nid
;
1715 nid_t new_xnid
= nid_of_node(page
);
1716 struct node_info ni
;
1718 /* 1: invalidate the previous xattr nid */
1722 /* Deallocate node address */
1723 get_node_info(sbi
, prev_xnid
, &ni
);
1724 f2fs_bug_on(sbi
, ni
.blk_addr
== NULL_ADDR
);
1725 invalidate_blocks(sbi
, ni
.blk_addr
);
1726 dec_valid_node_count(sbi
, inode
);
1727 set_node_addr(sbi
, &ni
, NULL_ADDR
, false);
1730 /* 2: allocate new xattr nid */
1731 if (unlikely(!inc_valid_node_count(sbi
, inode
)))
1732 f2fs_bug_on(sbi
, 1);
1734 remove_free_nid(NM_I(sbi
), new_xnid
);
1735 get_node_info(sbi
, new_xnid
, &ni
);
1736 ni
.ino
= inode
->i_ino
;
1737 set_node_addr(sbi
, &ni
, NEW_ADDR
, false);
1738 F2FS_I(inode
)->i_xattr_nid
= new_xnid
;
1740 /* 3: update xattr blkaddr */
1741 refresh_sit_entry(sbi
, NEW_ADDR
, blkaddr
);
1742 set_node_addr(sbi
, &ni
, blkaddr
, false);
1744 update_inode_page(inode
);
1747 int recover_inode_page(struct f2fs_sb_info
*sbi
, struct page
*page
)
1749 struct f2fs_inode
*src
, *dst
;
1750 nid_t ino
= ino_of_node(page
);
1751 struct node_info old_ni
, new_ni
;
1754 get_node_info(sbi
, ino
, &old_ni
);
1756 if (unlikely(old_ni
.blk_addr
!= NULL_ADDR
))
1759 ipage
= grab_cache_page(NODE_MAPPING(sbi
), ino
);
1763 /* Should not use this inode from free nid list */
1764 remove_free_nid(NM_I(sbi
), ino
);
1766 SetPageUptodate(ipage
);
1767 fill_node_footer(ipage
, ino
, ino
, 0, true);
1769 src
= F2FS_INODE(page
);
1770 dst
= F2FS_INODE(ipage
);
1772 memcpy(dst
, src
, (unsigned long)&src
->i_ext
- (unsigned long)src
);
1774 dst
->i_blocks
= cpu_to_le64(1);
1775 dst
->i_links
= cpu_to_le32(1);
1776 dst
->i_xattr_nid
= 0;
1777 dst
->i_inline
= src
->i_inline
& F2FS_INLINE_XATTR
;
1782 if (unlikely(!inc_valid_node_count(sbi
, NULL
)))
1784 set_node_addr(sbi
, &new_ni
, NEW_ADDR
, false);
1785 inc_valid_inode_count(sbi
);
1786 set_page_dirty(ipage
);
1787 f2fs_put_page(ipage
, 1);
1791 int restore_node_summary(struct f2fs_sb_info
*sbi
,
1792 unsigned int segno
, struct f2fs_summary_block
*sum
)
1794 struct f2fs_node
*rn
;
1795 struct f2fs_summary
*sum_entry
;
1797 int bio_blocks
= MAX_BIO_BLOCKS(sbi
);
1798 int i
, idx
, last_offset
, nrpages
;
1800 /* scan the node segment */
1801 last_offset
= sbi
->blocks_per_seg
;
1802 addr
= START_BLOCK(sbi
, segno
);
1803 sum_entry
= &sum
->entries
[0];
1805 for (i
= 0; i
< last_offset
; i
+= nrpages
, addr
+= nrpages
) {
1806 nrpages
= min(last_offset
- i
, bio_blocks
);
1808 /* readahead node pages */
1809 ra_meta_pages(sbi
, addr
, nrpages
, META_POR
, true);
1811 for (idx
= addr
; idx
< addr
+ nrpages
; idx
++) {
1812 struct page
*page
= get_tmp_page(sbi
, idx
);
1814 rn
= F2FS_NODE(page
);
1815 sum_entry
->nid
= rn
->footer
.nid
;
1816 sum_entry
->version
= 0;
1817 sum_entry
->ofs_in_node
= 0;
1819 f2fs_put_page(page
, 1);
1822 invalidate_mapping_pages(META_MAPPING(sbi
), addr
,
1828 static void remove_nats_in_journal(struct f2fs_sb_info
*sbi
)
1830 struct f2fs_nm_info
*nm_i
= NM_I(sbi
);
1831 struct curseg_info
*curseg
= CURSEG_I(sbi
, CURSEG_HOT_DATA
);
1832 struct f2fs_summary_block
*sum
= curseg
->sum_blk
;
1835 mutex_lock(&curseg
->curseg_mutex
);
1836 for (i
= 0; i
< nats_in_cursum(sum
); i
++) {
1837 struct nat_entry
*ne
;
1838 struct f2fs_nat_entry raw_ne
;
1839 nid_t nid
= le32_to_cpu(nid_in_journal(sum
, i
));
1841 raw_ne
= nat_in_journal(sum
, i
);
1843 ne
= __lookup_nat_cache(nm_i
, nid
);
1845 ne
= grab_nat_entry(nm_i
, nid
);
1846 node_info_from_raw_nat(&ne
->ni
, &raw_ne
);
1848 __set_nat_cache_dirty(nm_i
, ne
);
1850 update_nats_in_cursum(sum
, -i
);
1851 mutex_unlock(&curseg
->curseg_mutex
);
1854 static void __adjust_nat_entry_set(struct nat_entry_set
*nes
,
1855 struct list_head
*head
, int max
)
1857 struct nat_entry_set
*cur
;
1859 if (nes
->entry_cnt
>= max
)
1862 list_for_each_entry(cur
, head
, set_list
) {
1863 if (cur
->entry_cnt
>= nes
->entry_cnt
) {
1864 list_add(&nes
->set_list
, cur
->set_list
.prev
);
1869 list_add_tail(&nes
->set_list
, head
);
1872 static void __flush_nat_entry_set(struct f2fs_sb_info
*sbi
,
1873 struct nat_entry_set
*set
)
1875 struct curseg_info
*curseg
= CURSEG_I(sbi
, CURSEG_HOT_DATA
);
1876 struct f2fs_summary_block
*sum
= curseg
->sum_blk
;
1877 nid_t start_nid
= set
->set
* NAT_ENTRY_PER_BLOCK
;
1878 bool to_journal
= true;
1879 struct f2fs_nat_block
*nat_blk
;
1880 struct nat_entry
*ne
, *cur
;
1881 struct page
*page
= NULL
;
1884 * there are two steps to flush nat entries:
1885 * #1, flush nat entries to journal in current hot data summary block.
1886 * #2, flush nat entries to nat page.
1888 if (!__has_cursum_space(sum
, set
->entry_cnt
, NAT_JOURNAL
))
1892 mutex_lock(&curseg
->curseg_mutex
);
1894 page
= get_next_nat_page(sbi
, start_nid
);
1895 nat_blk
= page_address(page
);
1896 f2fs_bug_on(sbi
, !nat_blk
);
1899 /* flush dirty nats in nat entry set */
1900 list_for_each_entry_safe(ne
, cur
, &set
->entry_list
, list
) {
1901 struct f2fs_nat_entry
*raw_ne
;
1902 nid_t nid
= nat_get_nid(ne
);
1905 if (nat_get_blkaddr(ne
) == NEW_ADDR
)
1909 offset
= lookup_journal_in_cursum(sum
,
1910 NAT_JOURNAL
, nid
, 1);
1911 f2fs_bug_on(sbi
, offset
< 0);
1912 raw_ne
= &nat_in_journal(sum
, offset
);
1913 nid_in_journal(sum
, offset
) = cpu_to_le32(nid
);
1915 raw_ne
= &nat_blk
->entries
[nid
- start_nid
];
1917 raw_nat_from_node_info(raw_ne
, &ne
->ni
);
1919 __clear_nat_cache_dirty(NM_I(sbi
), ne
);
1920 if (nat_get_blkaddr(ne
) == NULL_ADDR
)
1921 add_free_nid(sbi
, nid
, false);
1925 mutex_unlock(&curseg
->curseg_mutex
);
1927 f2fs_put_page(page
, 1);
1929 f2fs_bug_on(sbi
, set
->entry_cnt
);
1931 radix_tree_delete(&NM_I(sbi
)->nat_set_root
, set
->set
);
1932 kmem_cache_free(nat_entry_set_slab
, set
);
1936 * This function is called during the checkpointing process.
1938 void flush_nat_entries(struct f2fs_sb_info
*sbi
)
1940 struct f2fs_nm_info
*nm_i
= NM_I(sbi
);
1941 struct curseg_info
*curseg
= CURSEG_I(sbi
, CURSEG_HOT_DATA
);
1942 struct f2fs_summary_block
*sum
= curseg
->sum_blk
;
1943 struct nat_entry_set
*setvec
[SETVEC_SIZE
];
1944 struct nat_entry_set
*set
, *tmp
;
1949 if (!nm_i
->dirty_nat_cnt
)
1952 down_write(&nm_i
->nat_tree_lock
);
1955 * if there are no enough space in journal to store dirty nat
1956 * entries, remove all entries from journal and merge them
1957 * into nat entry set.
1959 if (!__has_cursum_space(sum
, nm_i
->dirty_nat_cnt
, NAT_JOURNAL
))
1960 remove_nats_in_journal(sbi
);
1962 while ((found
= __gang_lookup_nat_set(nm_i
,
1963 set_idx
, SETVEC_SIZE
, setvec
))) {
1965 set_idx
= setvec
[found
- 1]->set
+ 1;
1966 for (idx
= 0; idx
< found
; idx
++)
1967 __adjust_nat_entry_set(setvec
[idx
], &sets
,
1968 MAX_NAT_JENTRIES(sum
));
1971 /* flush dirty nats in nat entry set */
1972 list_for_each_entry_safe(set
, tmp
, &sets
, set_list
)
1973 __flush_nat_entry_set(sbi
, set
);
1975 up_write(&nm_i
->nat_tree_lock
);
1977 f2fs_bug_on(sbi
, nm_i
->dirty_nat_cnt
);
1980 static int init_node_manager(struct f2fs_sb_info
*sbi
)
1982 struct f2fs_super_block
*sb_raw
= F2FS_RAW_SUPER(sbi
);
1983 struct f2fs_nm_info
*nm_i
= NM_I(sbi
);
1984 unsigned char *version_bitmap
;
1985 unsigned int nat_segs
, nat_blocks
;
1987 nm_i
->nat_blkaddr
= le32_to_cpu(sb_raw
->nat_blkaddr
);
1989 /* segment_count_nat includes pair segment so divide to 2. */
1990 nat_segs
= le32_to_cpu(sb_raw
->segment_count_nat
) >> 1;
1991 nat_blocks
= nat_segs
<< le32_to_cpu(sb_raw
->log_blocks_per_seg
);
1993 nm_i
->max_nid
= NAT_ENTRY_PER_BLOCK
* nat_blocks
;
1995 /* not used nids: 0, node, meta, (and root counted as valid node) */
1996 nm_i
->available_nids
= nm_i
->max_nid
- F2FS_RESERVED_NODE_NUM
;
1999 nm_i
->ram_thresh
= DEF_RAM_THRESHOLD
;
2000 nm_i
->ra_nid_pages
= DEF_RA_NID_PAGES
;
2002 INIT_RADIX_TREE(&nm_i
->free_nid_root
, GFP_ATOMIC
);
2003 INIT_LIST_HEAD(&nm_i
->free_nid_list
);
2004 INIT_RADIX_TREE(&nm_i
->nat_root
, GFP_NOIO
);
2005 INIT_RADIX_TREE(&nm_i
->nat_set_root
, GFP_NOIO
);
2006 INIT_LIST_HEAD(&nm_i
->nat_entries
);
2008 mutex_init(&nm_i
->build_lock
);
2009 spin_lock_init(&nm_i
->free_nid_list_lock
);
2010 init_rwsem(&nm_i
->nat_tree_lock
);
2012 nm_i
->next_scan_nid
= le32_to_cpu(sbi
->ckpt
->next_free_nid
);
2013 nm_i
->bitmap_size
= __bitmap_size(sbi
, NAT_BITMAP
);
2014 version_bitmap
= __bitmap_ptr(sbi
, NAT_BITMAP
);
2015 if (!version_bitmap
)
2018 nm_i
->nat_bitmap
= kmemdup(version_bitmap
, nm_i
->bitmap_size
,
2020 if (!nm_i
->nat_bitmap
)
2025 int build_node_manager(struct f2fs_sb_info
*sbi
)
2029 sbi
->nm_info
= kzalloc(sizeof(struct f2fs_nm_info
), GFP_KERNEL
);
2033 err
= init_node_manager(sbi
);
2037 build_free_nids(sbi
);
2041 void destroy_node_manager(struct f2fs_sb_info
*sbi
)
2043 struct f2fs_nm_info
*nm_i
= NM_I(sbi
);
2044 struct free_nid
*i
, *next_i
;
2045 struct nat_entry
*natvec
[NATVEC_SIZE
];
2046 struct nat_entry_set
*setvec
[SETVEC_SIZE
];
2053 /* destroy free nid list */
2054 spin_lock(&nm_i
->free_nid_list_lock
);
2055 list_for_each_entry_safe(i
, next_i
, &nm_i
->free_nid_list
, list
) {
2056 f2fs_bug_on(sbi
, i
->state
== NID_ALLOC
);
2057 __del_from_free_nid_list(nm_i
, i
);
2059 spin_unlock(&nm_i
->free_nid_list_lock
);
2060 kmem_cache_free(free_nid_slab
, i
);
2061 spin_lock(&nm_i
->free_nid_list_lock
);
2063 f2fs_bug_on(sbi
, nm_i
->fcnt
);
2064 spin_unlock(&nm_i
->free_nid_list_lock
);
2066 /* destroy nat cache */
2067 down_write(&nm_i
->nat_tree_lock
);
2068 while ((found
= __gang_lookup_nat_cache(nm_i
,
2069 nid
, NATVEC_SIZE
, natvec
))) {
2072 nid
= nat_get_nid(natvec
[found
- 1]) + 1;
2073 for (idx
= 0; idx
< found
; idx
++)
2074 __del_from_nat_cache(nm_i
, natvec
[idx
]);
2076 f2fs_bug_on(sbi
, nm_i
->nat_cnt
);
2078 /* destroy nat set cache */
2080 while ((found
= __gang_lookup_nat_set(nm_i
,
2081 nid
, SETVEC_SIZE
, setvec
))) {
2084 nid
= setvec
[found
- 1]->set
+ 1;
2085 for (idx
= 0; idx
< found
; idx
++) {
2086 /* entry_cnt is not zero, when cp_error was occurred */
2087 f2fs_bug_on(sbi
, !list_empty(&setvec
[idx
]->entry_list
));
2088 radix_tree_delete(&nm_i
->nat_set_root
, setvec
[idx
]->set
);
2089 kmem_cache_free(nat_entry_set_slab
, setvec
[idx
]);
2092 up_write(&nm_i
->nat_tree_lock
);
2094 kfree(nm_i
->nat_bitmap
);
2095 sbi
->nm_info
= NULL
;
2099 int __init
create_node_manager_caches(void)
2101 nat_entry_slab
= f2fs_kmem_cache_create("nat_entry",
2102 sizeof(struct nat_entry
));
2103 if (!nat_entry_slab
)
2106 free_nid_slab
= f2fs_kmem_cache_create("free_nid",
2107 sizeof(struct free_nid
));
2109 goto destroy_nat_entry
;
2111 nat_entry_set_slab
= f2fs_kmem_cache_create("nat_entry_set",
2112 sizeof(struct nat_entry_set
));
2113 if (!nat_entry_set_slab
)
2114 goto destroy_free_nid
;
2118 kmem_cache_destroy(free_nid_slab
);
2120 kmem_cache_destroy(nat_entry_slab
);
2125 void destroy_node_manager_caches(void)
2127 kmem_cache_destroy(nat_entry_set_slab
);
2128 kmem_cache_destroy(free_nid_slab
);
2129 kmem_cache_destroy(nat_entry_slab
);