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>
22 #include <trace/events/f2fs.h>
24 #define on_build_free_nids(nmi) mutex_is_locked(&nm_i->build_lock)
26 static struct kmem_cache
*nat_entry_slab
;
27 static struct kmem_cache
*free_nid_slab
;
28 static struct kmem_cache
*nat_entry_set_slab
;
30 bool available_free_memory(struct f2fs_sb_info
*sbi
, int type
)
32 struct f2fs_nm_info
*nm_i
= NM_I(sbi
);
34 unsigned long mem_size
= 0;
38 /* give 25%, 25%, 50% memory for each components respectively */
39 if (type
== FREE_NIDS
) {
40 mem_size
= (nm_i
->fcnt
* sizeof(struct free_nid
)) >> 12;
41 res
= mem_size
< ((val
.totalram
* nm_i
->ram_thresh
/ 100) >> 2);
42 } else if (type
== NAT_ENTRIES
) {
43 mem_size
= (nm_i
->nat_cnt
* sizeof(struct nat_entry
)) >> 12;
44 res
= mem_size
< ((val
.totalram
* nm_i
->ram_thresh
/ 100) >> 2);
45 } else if (type
== DIRTY_DENTS
) {
46 if (sbi
->sb
->s_bdi
->dirty_exceeded
)
48 mem_size
= get_pages(sbi
, F2FS_DIRTY_DENTS
);
49 res
= mem_size
< ((val
.totalram
* nm_i
->ram_thresh
/ 100) >> 1);
54 static void clear_node_page_dirty(struct page
*page
)
56 struct address_space
*mapping
= page
->mapping
;
57 unsigned int long flags
;
59 if (PageDirty(page
)) {
60 spin_lock_irqsave(&mapping
->tree_lock
, flags
);
61 radix_tree_tag_clear(&mapping
->page_tree
,
64 spin_unlock_irqrestore(&mapping
->tree_lock
, flags
);
66 clear_page_dirty_for_io(page
);
67 dec_page_count(F2FS_M_SB(mapping
), F2FS_DIRTY_NODES
);
69 ClearPageUptodate(page
);
72 static struct page
*get_current_nat_page(struct f2fs_sb_info
*sbi
, nid_t nid
)
74 pgoff_t index
= current_nat_addr(sbi
, nid
);
75 return get_meta_page(sbi
, index
);
78 static struct page
*get_next_nat_page(struct f2fs_sb_info
*sbi
, nid_t nid
)
80 struct page
*src_page
;
81 struct page
*dst_page
;
86 struct f2fs_nm_info
*nm_i
= NM_I(sbi
);
88 src_off
= current_nat_addr(sbi
, nid
);
89 dst_off
= next_nat_addr(sbi
, src_off
);
91 /* get current nat block page with lock */
92 src_page
= get_meta_page(sbi
, src_off
);
93 dst_page
= grab_meta_page(sbi
, dst_off
);
94 f2fs_bug_on(sbi
, PageDirty(src_page
));
96 src_addr
= page_address(src_page
);
97 dst_addr
= page_address(dst_page
);
98 memcpy(dst_addr
, src_addr
, PAGE_CACHE_SIZE
);
99 set_page_dirty(dst_page
);
100 f2fs_put_page(src_page
, 1);
102 set_to_next_nat(nm_i
, nid
);
107 static struct nat_entry
*__lookup_nat_cache(struct f2fs_nm_info
*nm_i
, nid_t n
)
109 return radix_tree_lookup(&nm_i
->nat_root
, n
);
112 static unsigned int __gang_lookup_nat_cache(struct f2fs_nm_info
*nm_i
,
113 nid_t start
, unsigned int nr
, struct nat_entry
**ep
)
115 return radix_tree_gang_lookup(&nm_i
->nat_root
, (void **)ep
, start
, nr
);
118 static void __del_from_nat_cache(struct f2fs_nm_info
*nm_i
, struct nat_entry
*e
)
121 radix_tree_delete(&nm_i
->nat_root
, nat_get_nid(e
));
123 kmem_cache_free(nat_entry_slab
, e
);
126 static void __set_nat_cache_dirty(struct f2fs_nm_info
*nm_i
,
127 struct nat_entry
*ne
)
129 nid_t set
= NAT_BLOCK_OFFSET(ne
->ni
.nid
);
130 struct nat_entry_set
*head
;
132 if (get_nat_flag(ne
, IS_DIRTY
))
135 head
= radix_tree_lookup(&nm_i
->nat_set_root
, set
);
137 head
= f2fs_kmem_cache_alloc(nat_entry_set_slab
, GFP_ATOMIC
);
139 INIT_LIST_HEAD(&head
->entry_list
);
140 INIT_LIST_HEAD(&head
->set_list
);
144 if (radix_tree_insert(&nm_i
->nat_set_root
, set
, head
)) {
149 list_move_tail(&ne
->list
, &head
->entry_list
);
150 nm_i
->dirty_nat_cnt
++;
152 set_nat_flag(ne
, IS_DIRTY
, true);
155 static void __clear_nat_cache_dirty(struct f2fs_nm_info
*nm_i
,
156 struct nat_entry
*ne
)
158 nid_t set
= ne
->ni
.nid
/ NAT_ENTRY_PER_BLOCK
;
159 struct nat_entry_set
*head
;
161 head
= radix_tree_lookup(&nm_i
->nat_set_root
, set
);
163 list_move_tail(&ne
->list
, &nm_i
->nat_entries
);
164 set_nat_flag(ne
, IS_DIRTY
, false);
166 nm_i
->dirty_nat_cnt
--;
170 static unsigned int __gang_lookup_nat_set(struct f2fs_nm_info
*nm_i
,
171 nid_t start
, unsigned int nr
, struct nat_entry_set
**ep
)
173 return radix_tree_gang_lookup(&nm_i
->nat_set_root
, (void **)ep
,
177 bool is_checkpointed_node(struct f2fs_sb_info
*sbi
, nid_t nid
)
179 struct f2fs_nm_info
*nm_i
= NM_I(sbi
);
183 read_lock(&nm_i
->nat_tree_lock
);
184 e
= __lookup_nat_cache(nm_i
, nid
);
185 if (e
&& !get_nat_flag(e
, IS_CHECKPOINTED
))
187 read_unlock(&nm_i
->nat_tree_lock
);
191 bool has_fsynced_inode(struct f2fs_sb_info
*sbi
, nid_t ino
)
193 struct f2fs_nm_info
*nm_i
= NM_I(sbi
);
195 bool fsynced
= false;
197 read_lock(&nm_i
->nat_tree_lock
);
198 e
= __lookup_nat_cache(nm_i
, ino
);
199 if (e
&& get_nat_flag(e
, HAS_FSYNCED_INODE
))
201 read_unlock(&nm_i
->nat_tree_lock
);
205 bool need_inode_block_update(struct f2fs_sb_info
*sbi
, nid_t ino
)
207 struct f2fs_nm_info
*nm_i
= NM_I(sbi
);
209 bool need_update
= true;
211 read_lock(&nm_i
->nat_tree_lock
);
212 e
= __lookup_nat_cache(nm_i
, ino
);
213 if (e
&& get_nat_flag(e
, HAS_LAST_FSYNC
) &&
214 (get_nat_flag(e
, IS_CHECKPOINTED
) ||
215 get_nat_flag(e
, HAS_FSYNCED_INODE
)))
217 read_unlock(&nm_i
->nat_tree_lock
);
221 static struct nat_entry
*grab_nat_entry(struct f2fs_nm_info
*nm_i
, nid_t nid
)
223 struct nat_entry
*new;
225 new = kmem_cache_alloc(nat_entry_slab
, GFP_ATOMIC
);
228 if (radix_tree_insert(&nm_i
->nat_root
, nid
, new)) {
229 kmem_cache_free(nat_entry_slab
, new);
232 memset(new, 0, sizeof(struct nat_entry
));
233 nat_set_nid(new, nid
);
235 list_add_tail(&new->list
, &nm_i
->nat_entries
);
240 static void cache_nat_entry(struct f2fs_nm_info
*nm_i
, nid_t nid
,
241 struct f2fs_nat_entry
*ne
)
245 write_lock(&nm_i
->nat_tree_lock
);
246 e
= __lookup_nat_cache(nm_i
, nid
);
248 e
= grab_nat_entry(nm_i
, nid
);
250 write_unlock(&nm_i
->nat_tree_lock
);
253 node_info_from_raw_nat(&e
->ni
, ne
);
255 write_unlock(&nm_i
->nat_tree_lock
);
258 static void set_node_addr(struct f2fs_sb_info
*sbi
, struct node_info
*ni
,
259 block_t new_blkaddr
, bool fsync_done
)
261 struct f2fs_nm_info
*nm_i
= NM_I(sbi
);
264 write_lock(&nm_i
->nat_tree_lock
);
265 e
= __lookup_nat_cache(nm_i
, ni
->nid
);
267 e
= grab_nat_entry(nm_i
, ni
->nid
);
269 write_unlock(&nm_i
->nat_tree_lock
);
273 f2fs_bug_on(sbi
, ni
->blk_addr
== NEW_ADDR
);
274 } else if (new_blkaddr
== NEW_ADDR
) {
276 * when nid is reallocated,
277 * previous nat entry can be remained in nat cache.
278 * So, reinitialize it with new information.
281 f2fs_bug_on(sbi
, ni
->blk_addr
!= NULL_ADDR
);
285 f2fs_bug_on(sbi
, nat_get_blkaddr(e
) != ni
->blk_addr
);
286 f2fs_bug_on(sbi
, nat_get_blkaddr(e
) == NULL_ADDR
&&
287 new_blkaddr
== NULL_ADDR
);
288 f2fs_bug_on(sbi
, nat_get_blkaddr(e
) == NEW_ADDR
&&
289 new_blkaddr
== NEW_ADDR
);
290 f2fs_bug_on(sbi
, nat_get_blkaddr(e
) != NEW_ADDR
&&
291 nat_get_blkaddr(e
) != NULL_ADDR
&&
292 new_blkaddr
== NEW_ADDR
);
294 /* increment version no as node is removed */
295 if (nat_get_blkaddr(e
) != NEW_ADDR
&& new_blkaddr
== NULL_ADDR
) {
296 unsigned char version
= nat_get_version(e
);
297 nat_set_version(e
, inc_node_version(version
));
301 nat_set_blkaddr(e
, new_blkaddr
);
302 if (new_blkaddr
== NEW_ADDR
|| new_blkaddr
== NULL_ADDR
)
303 set_nat_flag(e
, IS_CHECKPOINTED
, false);
304 __set_nat_cache_dirty(nm_i
, e
);
306 /* update fsync_mark if its inode nat entry is still alive */
307 e
= __lookup_nat_cache(nm_i
, ni
->ino
);
309 if (fsync_done
&& ni
->nid
== ni
->ino
)
310 set_nat_flag(e
, HAS_FSYNCED_INODE
, true);
311 set_nat_flag(e
, HAS_LAST_FSYNC
, fsync_done
);
313 write_unlock(&nm_i
->nat_tree_lock
);
316 int try_to_free_nats(struct f2fs_sb_info
*sbi
, int nr_shrink
)
318 struct f2fs_nm_info
*nm_i
= NM_I(sbi
);
320 if (available_free_memory(sbi
, NAT_ENTRIES
))
323 write_lock(&nm_i
->nat_tree_lock
);
324 while (nr_shrink
&& !list_empty(&nm_i
->nat_entries
)) {
325 struct nat_entry
*ne
;
326 ne
= list_first_entry(&nm_i
->nat_entries
,
327 struct nat_entry
, list
);
328 __del_from_nat_cache(nm_i
, ne
);
331 write_unlock(&nm_i
->nat_tree_lock
);
336 * This function always returns success
338 void get_node_info(struct f2fs_sb_info
*sbi
, nid_t nid
, struct node_info
*ni
)
340 struct f2fs_nm_info
*nm_i
= NM_I(sbi
);
341 struct curseg_info
*curseg
= CURSEG_I(sbi
, CURSEG_HOT_DATA
);
342 struct f2fs_summary_block
*sum
= curseg
->sum_blk
;
343 nid_t start_nid
= START_NID(nid
);
344 struct f2fs_nat_block
*nat_blk
;
345 struct page
*page
= NULL
;
346 struct f2fs_nat_entry ne
;
350 memset(&ne
, 0, sizeof(struct f2fs_nat_entry
));
353 /* Check nat cache */
354 read_lock(&nm_i
->nat_tree_lock
);
355 e
= __lookup_nat_cache(nm_i
, nid
);
357 ni
->ino
= nat_get_ino(e
);
358 ni
->blk_addr
= nat_get_blkaddr(e
);
359 ni
->version
= nat_get_version(e
);
361 read_unlock(&nm_i
->nat_tree_lock
);
365 /* Check current segment summary */
366 mutex_lock(&curseg
->curseg_mutex
);
367 i
= lookup_journal_in_cursum(sum
, NAT_JOURNAL
, nid
, 0);
369 ne
= nat_in_journal(sum
, i
);
370 node_info_from_raw_nat(ni
, &ne
);
372 mutex_unlock(&curseg
->curseg_mutex
);
376 /* Fill node_info from nat page */
377 page
= get_current_nat_page(sbi
, start_nid
);
378 nat_blk
= (struct f2fs_nat_block
*)page_address(page
);
379 ne
= nat_blk
->entries
[nid
- start_nid
];
380 node_info_from_raw_nat(ni
, &ne
);
381 f2fs_put_page(page
, 1);
383 /* cache nat entry */
384 cache_nat_entry(NM_I(sbi
), nid
, &ne
);
388 * The maximum depth is four.
389 * Offset[0] will have raw inode offset.
391 static int get_node_path(struct f2fs_inode_info
*fi
, long block
,
392 int offset
[4], unsigned int noffset
[4])
394 const long direct_index
= ADDRS_PER_INODE(fi
);
395 const long direct_blks
= ADDRS_PER_BLOCK
;
396 const long dptrs_per_blk
= NIDS_PER_BLOCK
;
397 const long indirect_blks
= ADDRS_PER_BLOCK
* NIDS_PER_BLOCK
;
398 const long dindirect_blks
= indirect_blks
* NIDS_PER_BLOCK
;
404 if (block
< direct_index
) {
408 block
-= direct_index
;
409 if (block
< direct_blks
) {
410 offset
[n
++] = NODE_DIR1_BLOCK
;
416 block
-= direct_blks
;
417 if (block
< direct_blks
) {
418 offset
[n
++] = NODE_DIR2_BLOCK
;
424 block
-= direct_blks
;
425 if (block
< indirect_blks
) {
426 offset
[n
++] = NODE_IND1_BLOCK
;
428 offset
[n
++] = block
/ direct_blks
;
429 noffset
[n
] = 4 + offset
[n
- 1];
430 offset
[n
] = block
% direct_blks
;
434 block
-= indirect_blks
;
435 if (block
< indirect_blks
) {
436 offset
[n
++] = NODE_IND2_BLOCK
;
437 noffset
[n
] = 4 + dptrs_per_blk
;
438 offset
[n
++] = block
/ direct_blks
;
439 noffset
[n
] = 5 + dptrs_per_blk
+ offset
[n
- 1];
440 offset
[n
] = block
% direct_blks
;
444 block
-= indirect_blks
;
445 if (block
< dindirect_blks
) {
446 offset
[n
++] = NODE_DIND_BLOCK
;
447 noffset
[n
] = 5 + (dptrs_per_blk
* 2);
448 offset
[n
++] = block
/ indirect_blks
;
449 noffset
[n
] = 6 + (dptrs_per_blk
* 2) +
450 offset
[n
- 1] * (dptrs_per_blk
+ 1);
451 offset
[n
++] = (block
/ direct_blks
) % dptrs_per_blk
;
452 noffset
[n
] = 7 + (dptrs_per_blk
* 2) +
453 offset
[n
- 2] * (dptrs_per_blk
+ 1) +
455 offset
[n
] = block
% direct_blks
;
466 * Caller should call f2fs_put_dnode(dn).
467 * Also, it should grab and release a rwsem by calling f2fs_lock_op() and
468 * f2fs_unlock_op() only if ro is not set RDONLY_NODE.
469 * In the case of RDONLY_NODE, we don't need to care about mutex.
471 int get_dnode_of_data(struct dnode_of_data
*dn
, pgoff_t index
, int mode
)
473 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dn
->inode
);
474 struct page
*npage
[4];
477 unsigned int noffset
[4];
482 level
= get_node_path(F2FS_I(dn
->inode
), index
, offset
, noffset
);
484 nids
[0] = dn
->inode
->i_ino
;
485 npage
[0] = dn
->inode_page
;
488 npage
[0] = get_node_page(sbi
, nids
[0]);
489 if (IS_ERR(npage
[0]))
490 return PTR_ERR(npage
[0]);
494 nids
[1] = get_nid(parent
, offset
[0], true);
495 dn
->inode_page
= npage
[0];
496 dn
->inode_page_locked
= true;
498 /* get indirect or direct nodes */
499 for (i
= 1; i
<= level
; i
++) {
502 if (!nids
[i
] && mode
== ALLOC_NODE
) {
504 if (!alloc_nid(sbi
, &(nids
[i
]))) {
510 npage
[i
] = new_node_page(dn
, noffset
[i
], NULL
);
511 if (IS_ERR(npage
[i
])) {
512 alloc_nid_failed(sbi
, nids
[i
]);
513 err
= PTR_ERR(npage
[i
]);
517 set_nid(parent
, offset
[i
- 1], nids
[i
], i
== 1);
518 alloc_nid_done(sbi
, nids
[i
]);
520 } else if (mode
== LOOKUP_NODE_RA
&& i
== level
&& level
> 1) {
521 npage
[i
] = get_node_page_ra(parent
, offset
[i
- 1]);
522 if (IS_ERR(npage
[i
])) {
523 err
= PTR_ERR(npage
[i
]);
529 dn
->inode_page_locked
= false;
532 f2fs_put_page(parent
, 1);
536 npage
[i
] = get_node_page(sbi
, nids
[i
]);
537 if (IS_ERR(npage
[i
])) {
538 err
= PTR_ERR(npage
[i
]);
539 f2fs_put_page(npage
[0], 0);
545 nids
[i
+ 1] = get_nid(parent
, offset
[i
], false);
548 dn
->nid
= nids
[level
];
549 dn
->ofs_in_node
= offset
[level
];
550 dn
->node_page
= npage
[level
];
551 dn
->data_blkaddr
= datablock_addr(dn
->node_page
, dn
->ofs_in_node
);
555 f2fs_put_page(parent
, 1);
557 f2fs_put_page(npage
[0], 0);
559 dn
->inode_page
= NULL
;
560 dn
->node_page
= NULL
;
564 static void truncate_node(struct dnode_of_data
*dn
)
566 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dn
->inode
);
569 get_node_info(sbi
, dn
->nid
, &ni
);
570 if (dn
->inode
->i_blocks
== 0) {
571 f2fs_bug_on(sbi
, ni
.blk_addr
!= NULL_ADDR
);
574 f2fs_bug_on(sbi
, ni
.blk_addr
== NULL_ADDR
);
576 /* Deallocate node address */
577 invalidate_blocks(sbi
, ni
.blk_addr
);
578 dec_valid_node_count(sbi
, dn
->inode
);
579 set_node_addr(sbi
, &ni
, NULL_ADDR
, false);
581 if (dn
->nid
== dn
->inode
->i_ino
) {
582 remove_orphan_inode(sbi
, dn
->nid
);
583 dec_valid_inode_count(sbi
);
588 clear_node_page_dirty(dn
->node_page
);
589 F2FS_SET_SB_DIRT(sbi
);
591 f2fs_put_page(dn
->node_page
, 1);
593 invalidate_mapping_pages(NODE_MAPPING(sbi
),
594 dn
->node_page
->index
, dn
->node_page
->index
);
596 dn
->node_page
= NULL
;
597 trace_f2fs_truncate_node(dn
->inode
, dn
->nid
, ni
.blk_addr
);
600 static int truncate_dnode(struct dnode_of_data
*dn
)
607 /* get direct node */
608 page
= get_node_page(F2FS_I_SB(dn
->inode
), dn
->nid
);
609 if (IS_ERR(page
) && PTR_ERR(page
) == -ENOENT
)
611 else if (IS_ERR(page
))
612 return PTR_ERR(page
);
614 /* Make dnode_of_data for parameter */
615 dn
->node_page
= page
;
617 truncate_data_blocks(dn
);
622 static int truncate_nodes(struct dnode_of_data
*dn
, unsigned int nofs
,
625 struct dnode_of_data rdn
= *dn
;
627 struct f2fs_node
*rn
;
629 unsigned int child_nofs
;
634 return NIDS_PER_BLOCK
+ 1;
636 trace_f2fs_truncate_nodes_enter(dn
->inode
, dn
->nid
, dn
->data_blkaddr
);
638 page
= get_node_page(F2FS_I_SB(dn
->inode
), dn
->nid
);
640 trace_f2fs_truncate_nodes_exit(dn
->inode
, PTR_ERR(page
));
641 return PTR_ERR(page
);
644 rn
= F2FS_NODE(page
);
646 for (i
= ofs
; i
< NIDS_PER_BLOCK
; i
++, freed
++) {
647 child_nid
= le32_to_cpu(rn
->in
.nid
[i
]);
651 ret
= truncate_dnode(&rdn
);
654 set_nid(page
, i
, 0, false);
657 child_nofs
= nofs
+ ofs
* (NIDS_PER_BLOCK
+ 1) + 1;
658 for (i
= ofs
; i
< NIDS_PER_BLOCK
; i
++) {
659 child_nid
= le32_to_cpu(rn
->in
.nid
[i
]);
660 if (child_nid
== 0) {
661 child_nofs
+= NIDS_PER_BLOCK
+ 1;
665 ret
= truncate_nodes(&rdn
, child_nofs
, 0, depth
- 1);
666 if (ret
== (NIDS_PER_BLOCK
+ 1)) {
667 set_nid(page
, i
, 0, false);
669 } else if (ret
< 0 && ret
!= -ENOENT
) {
677 /* remove current indirect node */
678 dn
->node_page
= page
;
682 f2fs_put_page(page
, 1);
684 trace_f2fs_truncate_nodes_exit(dn
->inode
, freed
);
688 f2fs_put_page(page
, 1);
689 trace_f2fs_truncate_nodes_exit(dn
->inode
, ret
);
693 static int truncate_partial_nodes(struct dnode_of_data
*dn
,
694 struct f2fs_inode
*ri
, int *offset
, int depth
)
696 struct page
*pages
[2];
703 nid
[0] = le32_to_cpu(ri
->i_nid
[offset
[0] - NODE_DIR1_BLOCK
]);
707 /* get indirect nodes in the path */
708 for (i
= 0; i
< idx
+ 1; i
++) {
709 /* reference count'll be increased */
710 pages
[i
] = get_node_page(F2FS_I_SB(dn
->inode
), nid
[i
]);
711 if (IS_ERR(pages
[i
])) {
712 err
= PTR_ERR(pages
[i
]);
716 nid
[i
+ 1] = get_nid(pages
[i
], offset
[i
+ 1], false);
719 /* free direct nodes linked to a partial indirect node */
720 for (i
= offset
[idx
+ 1]; i
< NIDS_PER_BLOCK
; i
++) {
721 child_nid
= get_nid(pages
[idx
], i
, false);
725 err
= truncate_dnode(dn
);
728 set_nid(pages
[idx
], i
, 0, false);
731 if (offset
[idx
+ 1] == 0) {
732 dn
->node_page
= pages
[idx
];
736 f2fs_put_page(pages
[idx
], 1);
742 for (i
= idx
; i
>= 0; i
--)
743 f2fs_put_page(pages
[i
], 1);
745 trace_f2fs_truncate_partial_nodes(dn
->inode
, nid
, depth
, err
);
751 * All the block addresses of data and nodes should be nullified.
753 int truncate_inode_blocks(struct inode
*inode
, pgoff_t from
)
755 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
756 int err
= 0, cont
= 1;
757 int level
, offset
[4], noffset
[4];
758 unsigned int nofs
= 0;
759 struct f2fs_inode
*ri
;
760 struct dnode_of_data dn
;
763 trace_f2fs_truncate_inode_blocks_enter(inode
, from
);
765 level
= get_node_path(F2FS_I(inode
), from
, offset
, noffset
);
767 page
= get_node_page(sbi
, inode
->i_ino
);
769 trace_f2fs_truncate_inode_blocks_exit(inode
, PTR_ERR(page
));
770 return PTR_ERR(page
);
773 set_new_dnode(&dn
, inode
, page
, NULL
, 0);
776 ri
= F2FS_INODE(page
);
784 if (!offset
[level
- 1])
786 err
= truncate_partial_nodes(&dn
, ri
, offset
, level
);
787 if (err
< 0 && err
!= -ENOENT
)
789 nofs
+= 1 + NIDS_PER_BLOCK
;
792 nofs
= 5 + 2 * NIDS_PER_BLOCK
;
793 if (!offset
[level
- 1])
795 err
= truncate_partial_nodes(&dn
, ri
, offset
, level
);
796 if (err
< 0 && err
!= -ENOENT
)
805 dn
.nid
= le32_to_cpu(ri
->i_nid
[offset
[0] - NODE_DIR1_BLOCK
]);
807 case NODE_DIR1_BLOCK
:
808 case NODE_DIR2_BLOCK
:
809 err
= truncate_dnode(&dn
);
812 case NODE_IND1_BLOCK
:
813 case NODE_IND2_BLOCK
:
814 err
= truncate_nodes(&dn
, nofs
, offset
[1], 2);
817 case NODE_DIND_BLOCK
:
818 err
= truncate_nodes(&dn
, nofs
, offset
[1], 3);
825 if (err
< 0 && err
!= -ENOENT
)
827 if (offset
[1] == 0 &&
828 ri
->i_nid
[offset
[0] - NODE_DIR1_BLOCK
]) {
830 if (unlikely(page
->mapping
!= NODE_MAPPING(sbi
))) {
831 f2fs_put_page(page
, 1);
834 f2fs_wait_on_page_writeback(page
, NODE
);
835 ri
->i_nid
[offset
[0] - NODE_DIR1_BLOCK
] = 0;
836 set_page_dirty(page
);
844 f2fs_put_page(page
, 0);
845 trace_f2fs_truncate_inode_blocks_exit(inode
, err
);
846 return err
> 0 ? 0 : err
;
849 int truncate_xattr_node(struct inode
*inode
, struct page
*page
)
851 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
852 nid_t nid
= F2FS_I(inode
)->i_xattr_nid
;
853 struct dnode_of_data dn
;
859 npage
= get_node_page(sbi
, nid
);
861 return PTR_ERR(npage
);
863 F2FS_I(inode
)->i_xattr_nid
= 0;
865 /* need to do checkpoint during fsync */
866 F2FS_I(inode
)->xattr_ver
= cur_cp_version(F2FS_CKPT(sbi
));
868 set_new_dnode(&dn
, inode
, page
, npage
, nid
);
871 dn
.inode_page_locked
= true;
877 * Caller should grab and release a rwsem by calling f2fs_lock_op() and
880 void remove_inode_page(struct inode
*inode
)
882 struct dnode_of_data dn
;
884 set_new_dnode(&dn
, inode
, NULL
, NULL
, inode
->i_ino
);
885 if (get_dnode_of_data(&dn
, 0, LOOKUP_NODE
))
888 if (truncate_xattr_node(inode
, dn
.inode_page
)) {
893 /* remove potential inline_data blocks */
894 if (S_ISREG(inode
->i_mode
) || S_ISDIR(inode
->i_mode
) ||
895 S_ISLNK(inode
->i_mode
))
896 truncate_data_blocks_range(&dn
, 1);
898 /* 0 is possible, after f2fs_new_inode() has failed */
899 f2fs_bug_on(F2FS_I_SB(inode
),
900 inode
->i_blocks
!= 0 && inode
->i_blocks
!= 1);
902 /* will put inode & node pages */
906 struct page
*new_inode_page(struct inode
*inode
)
908 struct dnode_of_data dn
;
910 /* allocate inode page for new inode */
911 set_new_dnode(&dn
, inode
, NULL
, NULL
, inode
->i_ino
);
913 /* caller should f2fs_put_page(page, 1); */
914 return new_node_page(&dn
, 0, NULL
);
917 struct page
*new_node_page(struct dnode_of_data
*dn
,
918 unsigned int ofs
, struct page
*ipage
)
920 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dn
->inode
);
921 struct node_info old_ni
, new_ni
;
925 if (unlikely(is_inode_flag_set(F2FS_I(dn
->inode
), FI_NO_ALLOC
)))
926 return ERR_PTR(-EPERM
);
928 page
= grab_cache_page(NODE_MAPPING(sbi
), dn
->nid
);
930 return ERR_PTR(-ENOMEM
);
932 if (unlikely(!inc_valid_node_count(sbi
, dn
->inode
))) {
937 get_node_info(sbi
, dn
->nid
, &old_ni
);
939 /* Reinitialize old_ni with new node page */
940 f2fs_bug_on(sbi
, old_ni
.blk_addr
!= NULL_ADDR
);
942 new_ni
.ino
= dn
->inode
->i_ino
;
943 set_node_addr(sbi
, &new_ni
, NEW_ADDR
, false);
945 f2fs_wait_on_page_writeback(page
, NODE
);
946 fill_node_footer(page
, dn
->nid
, dn
->inode
->i_ino
, ofs
, true);
947 set_cold_node(dn
->inode
, page
);
948 SetPageUptodate(page
);
949 set_page_dirty(page
);
951 if (f2fs_has_xattr_block(ofs
))
952 F2FS_I(dn
->inode
)->i_xattr_nid
= dn
->nid
;
954 dn
->node_page
= page
;
956 update_inode(dn
->inode
, ipage
);
960 inc_valid_inode_count(sbi
);
965 clear_node_page_dirty(page
);
966 f2fs_put_page(page
, 1);
971 * Caller should do after getting the following values.
972 * 0: f2fs_put_page(page, 0)
973 * LOCKED_PAGE: f2fs_put_page(page, 1)
976 static int read_node_page(struct page
*page
, int rw
)
978 struct f2fs_sb_info
*sbi
= F2FS_P_SB(page
);
981 get_node_info(sbi
, page
->index
, &ni
);
983 if (unlikely(ni
.blk_addr
== NULL_ADDR
)) {
984 f2fs_put_page(page
, 1);
988 if (PageUptodate(page
))
991 return f2fs_submit_page_bio(sbi
, page
, ni
.blk_addr
, rw
);
995 * Readahead a node page
997 void ra_node_page(struct f2fs_sb_info
*sbi
, nid_t nid
)
1002 apage
= find_get_page(NODE_MAPPING(sbi
), nid
);
1003 if (apage
&& PageUptodate(apage
)) {
1004 f2fs_put_page(apage
, 0);
1007 f2fs_put_page(apage
, 0);
1009 apage
= grab_cache_page(NODE_MAPPING(sbi
), nid
);
1013 err
= read_node_page(apage
, READA
);
1015 f2fs_put_page(apage
, 0);
1016 else if (err
== LOCKED_PAGE
)
1017 f2fs_put_page(apage
, 1);
1020 struct page
*get_node_page(struct f2fs_sb_info
*sbi
, pgoff_t nid
)
1025 page
= grab_cache_page(NODE_MAPPING(sbi
), nid
);
1027 return ERR_PTR(-ENOMEM
);
1029 err
= read_node_page(page
, READ_SYNC
);
1031 return ERR_PTR(err
);
1032 else if (err
== LOCKED_PAGE
)
1036 if (unlikely(!PageUptodate(page
) || nid
!= nid_of_node(page
))) {
1037 f2fs_put_page(page
, 1);
1038 return ERR_PTR(-EIO
);
1040 if (unlikely(page
->mapping
!= NODE_MAPPING(sbi
))) {
1041 f2fs_put_page(page
, 1);
1049 * Return a locked page for the desired node page.
1050 * And, readahead MAX_RA_NODE number of node pages.
1052 struct page
*get_node_page_ra(struct page
*parent
, int start
)
1054 struct f2fs_sb_info
*sbi
= F2FS_P_SB(parent
);
1055 struct blk_plug plug
;
1060 /* First, try getting the desired direct node. */
1061 nid
= get_nid(parent
, start
, false);
1063 return ERR_PTR(-ENOENT
);
1065 page
= grab_cache_page(NODE_MAPPING(sbi
), nid
);
1067 return ERR_PTR(-ENOMEM
);
1069 err
= read_node_page(page
, READ_SYNC
);
1071 return ERR_PTR(err
);
1072 else if (err
== LOCKED_PAGE
)
1075 blk_start_plug(&plug
);
1077 /* Then, try readahead for siblings of the desired node */
1078 end
= start
+ MAX_RA_NODE
;
1079 end
= min(end
, NIDS_PER_BLOCK
);
1080 for (i
= start
+ 1; i
< end
; i
++) {
1081 nid
= get_nid(parent
, i
, false);
1084 ra_node_page(sbi
, nid
);
1087 blk_finish_plug(&plug
);
1090 if (unlikely(page
->mapping
!= NODE_MAPPING(sbi
))) {
1091 f2fs_put_page(page
, 1);
1095 if (unlikely(!PageUptodate(page
))) {
1096 f2fs_put_page(page
, 1);
1097 return ERR_PTR(-EIO
);
1102 void sync_inode_page(struct dnode_of_data
*dn
)
1104 if (IS_INODE(dn
->node_page
) || dn
->inode_page
== dn
->node_page
) {
1105 update_inode(dn
->inode
, dn
->node_page
);
1106 } else if (dn
->inode_page
) {
1107 if (!dn
->inode_page_locked
)
1108 lock_page(dn
->inode_page
);
1109 update_inode(dn
->inode
, dn
->inode_page
);
1110 if (!dn
->inode_page_locked
)
1111 unlock_page(dn
->inode_page
);
1113 update_inode_page(dn
->inode
);
1117 int sync_node_pages(struct f2fs_sb_info
*sbi
, nid_t ino
,
1118 struct writeback_control
*wbc
)
1121 struct pagevec pvec
;
1122 int step
= ino
? 2 : 0;
1123 int nwritten
= 0, wrote
= 0;
1125 pagevec_init(&pvec
, 0);
1131 while (index
<= end
) {
1133 nr_pages
= pagevec_lookup_tag(&pvec
, NODE_MAPPING(sbi
), &index
,
1134 PAGECACHE_TAG_DIRTY
,
1135 min(end
- index
, (pgoff_t
)PAGEVEC_SIZE
-1) + 1);
1139 for (i
= 0; i
< nr_pages
; i
++) {
1140 struct page
*page
= pvec
.pages
[i
];
1143 * flushing sequence with step:
1148 if (step
== 0 && IS_DNODE(page
))
1150 if (step
== 1 && (!IS_DNODE(page
) ||
1151 is_cold_node(page
)))
1153 if (step
== 2 && (!IS_DNODE(page
) ||
1154 !is_cold_node(page
)))
1159 * we should not skip writing node pages.
1161 if (ino
&& ino_of_node(page
) == ino
)
1163 else if (!trylock_page(page
))
1166 if (unlikely(page
->mapping
!= NODE_MAPPING(sbi
))) {
1171 if (ino
&& ino_of_node(page
) != ino
)
1172 goto continue_unlock
;
1174 if (!PageDirty(page
)) {
1175 /* someone wrote it for us */
1176 goto continue_unlock
;
1179 if (!clear_page_dirty_for_io(page
))
1180 goto continue_unlock
;
1182 /* called by fsync() */
1183 if (ino
&& IS_DNODE(page
)) {
1184 set_fsync_mark(page
, 1);
1185 if (IS_INODE(page
)) {
1186 if (!is_checkpointed_node(sbi
, ino
) &&
1187 !has_fsynced_inode(sbi
, ino
))
1188 set_dentry_mark(page
, 1);
1190 set_dentry_mark(page
, 0);
1194 set_fsync_mark(page
, 0);
1195 set_dentry_mark(page
, 0);
1198 if (NODE_MAPPING(sbi
)->a_ops
->writepage(page
, wbc
))
1203 if (--wbc
->nr_to_write
== 0)
1206 pagevec_release(&pvec
);
1209 if (wbc
->nr_to_write
== 0) {
1221 f2fs_submit_merged_bio(sbi
, NODE
, WRITE
);
1225 int wait_on_node_pages_writeback(struct f2fs_sb_info
*sbi
, nid_t ino
)
1227 pgoff_t index
= 0, end
= LONG_MAX
;
1228 struct pagevec pvec
;
1229 int ret2
= 0, ret
= 0;
1231 pagevec_init(&pvec
, 0);
1233 while (index
<= end
) {
1235 nr_pages
= pagevec_lookup_tag(&pvec
, NODE_MAPPING(sbi
), &index
,
1236 PAGECACHE_TAG_WRITEBACK
,
1237 min(end
- index
, (pgoff_t
)PAGEVEC_SIZE
-1) + 1);
1241 for (i
= 0; i
< nr_pages
; i
++) {
1242 struct page
*page
= pvec
.pages
[i
];
1244 /* until radix tree lookup accepts end_index */
1245 if (unlikely(page
->index
> end
))
1248 if (ino
&& ino_of_node(page
) == ino
) {
1249 f2fs_wait_on_page_writeback(page
, NODE
);
1250 if (TestClearPageError(page
))
1254 pagevec_release(&pvec
);
1258 if (unlikely(test_and_clear_bit(AS_ENOSPC
, &NODE_MAPPING(sbi
)->flags
)))
1260 if (unlikely(test_and_clear_bit(AS_EIO
, &NODE_MAPPING(sbi
)->flags
)))
1267 static int f2fs_write_node_page(struct page
*page
,
1268 struct writeback_control
*wbc
)
1270 struct f2fs_sb_info
*sbi
= F2FS_P_SB(page
);
1273 struct node_info ni
;
1274 struct f2fs_io_info fio
= {
1276 .rw
= (wbc
->sync_mode
== WB_SYNC_ALL
) ? WRITE_SYNC
: WRITE
,
1279 trace_f2fs_writepage(page
, NODE
);
1281 if (unlikely(sbi
->por_doing
))
1283 if (unlikely(f2fs_cp_error(sbi
)))
1286 f2fs_wait_on_page_writeback(page
, NODE
);
1288 /* get old block addr of this node page */
1289 nid
= nid_of_node(page
);
1290 f2fs_bug_on(sbi
, page
->index
!= nid
);
1292 get_node_info(sbi
, nid
, &ni
);
1294 /* This page is already truncated */
1295 if (unlikely(ni
.blk_addr
== NULL_ADDR
)) {
1296 dec_page_count(sbi
, F2FS_DIRTY_NODES
);
1301 if (wbc
->for_reclaim
)
1304 down_read(&sbi
->node_write
);
1305 set_page_writeback(page
);
1306 write_node_page(sbi
, page
, &fio
, nid
, ni
.blk_addr
, &new_addr
);
1307 set_node_addr(sbi
, &ni
, new_addr
, is_fsync_dnode(page
));
1308 dec_page_count(sbi
, F2FS_DIRTY_NODES
);
1309 up_read(&sbi
->node_write
);
1314 redirty_page_for_writepage(wbc
, page
);
1315 return AOP_WRITEPAGE_ACTIVATE
;
1318 static int f2fs_write_node_pages(struct address_space
*mapping
,
1319 struct writeback_control
*wbc
)
1321 struct f2fs_sb_info
*sbi
= F2FS_M_SB(mapping
);
1324 trace_f2fs_writepages(mapping
->host
, wbc
, NODE
);
1326 /* balancing f2fs's metadata in background */
1327 f2fs_balance_fs_bg(sbi
);
1329 /* collect a number of dirty node pages and write together */
1330 if (get_pages(sbi
, F2FS_DIRTY_NODES
) < nr_pages_to_skip(sbi
, NODE
))
1333 diff
= nr_pages_to_write(sbi
, NODE
, wbc
);
1334 wbc
->sync_mode
= WB_SYNC_NONE
;
1335 sync_node_pages(sbi
, 0, wbc
);
1336 wbc
->nr_to_write
= max((long)0, wbc
->nr_to_write
- diff
);
1340 wbc
->pages_skipped
+= get_pages(sbi
, F2FS_DIRTY_NODES
);
1344 static int f2fs_set_node_page_dirty(struct page
*page
)
1346 trace_f2fs_set_page_dirty(page
, NODE
);
1348 SetPageUptodate(page
);
1349 if (!PageDirty(page
)) {
1350 __set_page_dirty_nobuffers(page
);
1351 inc_page_count(F2FS_P_SB(page
), F2FS_DIRTY_NODES
);
1352 SetPagePrivate(page
);
1358 static void f2fs_invalidate_node_page(struct page
*page
, unsigned int offset
,
1359 unsigned int length
)
1361 struct inode
*inode
= page
->mapping
->host
;
1362 if (PageDirty(page
))
1363 dec_page_count(F2FS_I_SB(inode
), F2FS_DIRTY_NODES
);
1364 ClearPagePrivate(page
);
1367 static int f2fs_release_node_page(struct page
*page
, gfp_t wait
)
1369 ClearPagePrivate(page
);
1374 * Structure of the f2fs node operations
1376 const struct address_space_operations f2fs_node_aops
= {
1377 .writepage
= f2fs_write_node_page
,
1378 .writepages
= f2fs_write_node_pages
,
1379 .set_page_dirty
= f2fs_set_node_page_dirty
,
1380 .invalidatepage
= f2fs_invalidate_node_page
,
1381 .releasepage
= f2fs_release_node_page
,
1384 static struct free_nid
*__lookup_free_nid_list(struct f2fs_nm_info
*nm_i
,
1387 return radix_tree_lookup(&nm_i
->free_nid_root
, n
);
1390 static void __del_from_free_nid_list(struct f2fs_nm_info
*nm_i
,
1394 radix_tree_delete(&nm_i
->free_nid_root
, i
->nid
);
1397 static int add_free_nid(struct f2fs_sb_info
*sbi
, nid_t nid
, bool build
)
1399 struct f2fs_nm_info
*nm_i
= NM_I(sbi
);
1401 struct nat_entry
*ne
;
1402 bool allocated
= false;
1404 if (!available_free_memory(sbi
, FREE_NIDS
))
1407 /* 0 nid should not be used */
1408 if (unlikely(nid
== 0))
1412 /* do not add allocated nids */
1413 read_lock(&nm_i
->nat_tree_lock
);
1414 ne
= __lookup_nat_cache(nm_i
, nid
);
1416 (!get_nat_flag(ne
, IS_CHECKPOINTED
) ||
1417 nat_get_blkaddr(ne
) != NULL_ADDR
))
1419 read_unlock(&nm_i
->nat_tree_lock
);
1424 i
= f2fs_kmem_cache_alloc(free_nid_slab
, GFP_NOFS
);
1428 spin_lock(&nm_i
->free_nid_list_lock
);
1429 if (radix_tree_insert(&nm_i
->free_nid_root
, i
->nid
, i
)) {
1430 spin_unlock(&nm_i
->free_nid_list_lock
);
1431 kmem_cache_free(free_nid_slab
, i
);
1434 list_add_tail(&i
->list
, &nm_i
->free_nid_list
);
1436 spin_unlock(&nm_i
->free_nid_list_lock
);
1440 static void remove_free_nid(struct f2fs_nm_info
*nm_i
, nid_t nid
)
1443 bool need_free
= false;
1445 spin_lock(&nm_i
->free_nid_list_lock
);
1446 i
= __lookup_free_nid_list(nm_i
, nid
);
1447 if (i
&& i
->state
== NID_NEW
) {
1448 __del_from_free_nid_list(nm_i
, i
);
1452 spin_unlock(&nm_i
->free_nid_list_lock
);
1455 kmem_cache_free(free_nid_slab
, i
);
1458 static void scan_nat_page(struct f2fs_sb_info
*sbi
,
1459 struct page
*nat_page
, nid_t start_nid
)
1461 struct f2fs_nm_info
*nm_i
= NM_I(sbi
);
1462 struct f2fs_nat_block
*nat_blk
= page_address(nat_page
);
1466 i
= start_nid
% NAT_ENTRY_PER_BLOCK
;
1468 for (; i
< NAT_ENTRY_PER_BLOCK
; i
++, start_nid
++) {
1470 if (unlikely(start_nid
>= nm_i
->max_nid
))
1473 blk_addr
= le32_to_cpu(nat_blk
->entries
[i
].block_addr
);
1474 f2fs_bug_on(sbi
, blk_addr
== NEW_ADDR
);
1475 if (blk_addr
== NULL_ADDR
) {
1476 if (add_free_nid(sbi
, start_nid
, true) < 0)
1482 static void build_free_nids(struct f2fs_sb_info
*sbi
)
1484 struct f2fs_nm_info
*nm_i
= NM_I(sbi
);
1485 struct curseg_info
*curseg
= CURSEG_I(sbi
, CURSEG_HOT_DATA
);
1486 struct f2fs_summary_block
*sum
= curseg
->sum_blk
;
1488 nid_t nid
= nm_i
->next_scan_nid
;
1490 /* Enough entries */
1491 if (nm_i
->fcnt
> NAT_ENTRY_PER_BLOCK
)
1494 /* readahead nat pages to be scanned */
1495 ra_meta_pages(sbi
, NAT_BLOCK_OFFSET(nid
), FREE_NID_PAGES
, META_NAT
);
1498 struct page
*page
= get_current_nat_page(sbi
, nid
);
1500 scan_nat_page(sbi
, page
, nid
);
1501 f2fs_put_page(page
, 1);
1503 nid
+= (NAT_ENTRY_PER_BLOCK
- (nid
% NAT_ENTRY_PER_BLOCK
));
1504 if (unlikely(nid
>= nm_i
->max_nid
))
1507 if (i
++ == FREE_NID_PAGES
)
1511 /* go to the next free nat pages to find free nids abundantly */
1512 nm_i
->next_scan_nid
= nid
;
1514 /* find free nids from current sum_pages */
1515 mutex_lock(&curseg
->curseg_mutex
);
1516 for (i
= 0; i
< nats_in_cursum(sum
); i
++) {
1517 block_t addr
= le32_to_cpu(nat_in_journal(sum
, i
).block_addr
);
1518 nid
= le32_to_cpu(nid_in_journal(sum
, i
));
1519 if (addr
== NULL_ADDR
)
1520 add_free_nid(sbi
, nid
, true);
1522 remove_free_nid(nm_i
, nid
);
1524 mutex_unlock(&curseg
->curseg_mutex
);
1528 * If this function returns success, caller can obtain a new nid
1529 * from second parameter of this function.
1530 * The returned nid could be used ino as well as nid when inode is created.
1532 bool alloc_nid(struct f2fs_sb_info
*sbi
, nid_t
*nid
)
1534 struct f2fs_nm_info
*nm_i
= NM_I(sbi
);
1535 struct free_nid
*i
= NULL
;
1537 if (unlikely(sbi
->total_valid_node_count
+ 1 > nm_i
->available_nids
))
1540 spin_lock(&nm_i
->free_nid_list_lock
);
1542 /* We should not use stale free nids created by build_free_nids */
1543 if (nm_i
->fcnt
&& !on_build_free_nids(nm_i
)) {
1544 f2fs_bug_on(sbi
, list_empty(&nm_i
->free_nid_list
));
1545 list_for_each_entry(i
, &nm_i
->free_nid_list
, list
)
1546 if (i
->state
== NID_NEW
)
1549 f2fs_bug_on(sbi
, i
->state
!= NID_NEW
);
1551 i
->state
= NID_ALLOC
;
1553 spin_unlock(&nm_i
->free_nid_list_lock
);
1556 spin_unlock(&nm_i
->free_nid_list_lock
);
1558 /* Let's scan nat pages and its caches to get free nids */
1559 mutex_lock(&nm_i
->build_lock
);
1560 build_free_nids(sbi
);
1561 mutex_unlock(&nm_i
->build_lock
);
1566 * alloc_nid() should be called prior to this function.
1568 void alloc_nid_done(struct f2fs_sb_info
*sbi
, nid_t nid
)
1570 struct f2fs_nm_info
*nm_i
= NM_I(sbi
);
1573 spin_lock(&nm_i
->free_nid_list_lock
);
1574 i
= __lookup_free_nid_list(nm_i
, nid
);
1575 f2fs_bug_on(sbi
, !i
|| i
->state
!= NID_ALLOC
);
1576 __del_from_free_nid_list(nm_i
, i
);
1577 spin_unlock(&nm_i
->free_nid_list_lock
);
1579 kmem_cache_free(free_nid_slab
, i
);
1583 * alloc_nid() should be called prior to this function.
1585 void alloc_nid_failed(struct f2fs_sb_info
*sbi
, nid_t nid
)
1587 struct f2fs_nm_info
*nm_i
= NM_I(sbi
);
1589 bool need_free
= false;
1594 spin_lock(&nm_i
->free_nid_list_lock
);
1595 i
= __lookup_free_nid_list(nm_i
, nid
);
1596 f2fs_bug_on(sbi
, !i
|| i
->state
!= NID_ALLOC
);
1597 if (!available_free_memory(sbi
, FREE_NIDS
)) {
1598 __del_from_free_nid_list(nm_i
, i
);
1604 spin_unlock(&nm_i
->free_nid_list_lock
);
1607 kmem_cache_free(free_nid_slab
, i
);
1610 void recover_inline_xattr(struct inode
*inode
, struct page
*page
)
1612 void *src_addr
, *dst_addr
;
1615 struct f2fs_inode
*ri
;
1617 ipage
= get_node_page(F2FS_I_SB(inode
), inode
->i_ino
);
1618 f2fs_bug_on(F2FS_I_SB(inode
), IS_ERR(ipage
));
1620 ri
= F2FS_INODE(page
);
1621 if (!(ri
->i_inline
& F2FS_INLINE_XATTR
)) {
1622 clear_inode_flag(F2FS_I(inode
), FI_INLINE_XATTR
);
1626 dst_addr
= inline_xattr_addr(ipage
);
1627 src_addr
= inline_xattr_addr(page
);
1628 inline_size
= inline_xattr_size(inode
);
1630 f2fs_wait_on_page_writeback(ipage
, NODE
);
1631 memcpy(dst_addr
, src_addr
, inline_size
);
1633 update_inode(inode
, ipage
);
1634 f2fs_put_page(ipage
, 1);
1637 void recover_xattr_data(struct inode
*inode
, struct page
*page
, block_t blkaddr
)
1639 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
1640 nid_t prev_xnid
= F2FS_I(inode
)->i_xattr_nid
;
1641 nid_t new_xnid
= nid_of_node(page
);
1642 struct node_info ni
;
1644 /* 1: invalidate the previous xattr nid */
1648 /* Deallocate node address */
1649 get_node_info(sbi
, prev_xnid
, &ni
);
1650 f2fs_bug_on(sbi
, ni
.blk_addr
== NULL_ADDR
);
1651 invalidate_blocks(sbi
, ni
.blk_addr
);
1652 dec_valid_node_count(sbi
, inode
);
1653 set_node_addr(sbi
, &ni
, NULL_ADDR
, false);
1656 /* 2: allocate new xattr nid */
1657 if (unlikely(!inc_valid_node_count(sbi
, inode
)))
1658 f2fs_bug_on(sbi
, 1);
1660 remove_free_nid(NM_I(sbi
), new_xnid
);
1661 get_node_info(sbi
, new_xnid
, &ni
);
1662 ni
.ino
= inode
->i_ino
;
1663 set_node_addr(sbi
, &ni
, NEW_ADDR
, false);
1664 F2FS_I(inode
)->i_xattr_nid
= new_xnid
;
1666 /* 3: update xattr blkaddr */
1667 refresh_sit_entry(sbi
, NEW_ADDR
, blkaddr
);
1668 set_node_addr(sbi
, &ni
, blkaddr
, false);
1670 update_inode_page(inode
);
1673 int recover_inode_page(struct f2fs_sb_info
*sbi
, struct page
*page
)
1675 struct f2fs_inode
*src
, *dst
;
1676 nid_t ino
= ino_of_node(page
);
1677 struct node_info old_ni
, new_ni
;
1680 get_node_info(sbi
, ino
, &old_ni
);
1682 if (unlikely(old_ni
.blk_addr
!= NULL_ADDR
))
1685 ipage
= grab_cache_page(NODE_MAPPING(sbi
), ino
);
1689 /* Should not use this inode from free nid list */
1690 remove_free_nid(NM_I(sbi
), ino
);
1692 SetPageUptodate(ipage
);
1693 fill_node_footer(ipage
, ino
, ino
, 0, true);
1695 src
= F2FS_INODE(page
);
1696 dst
= F2FS_INODE(ipage
);
1698 memcpy(dst
, src
, (unsigned long)&src
->i_ext
- (unsigned long)src
);
1700 dst
->i_blocks
= cpu_to_le64(1);
1701 dst
->i_links
= cpu_to_le32(1);
1702 dst
->i_xattr_nid
= 0;
1703 dst
->i_inline
= src
->i_inline
& F2FS_INLINE_XATTR
;
1708 if (unlikely(!inc_valid_node_count(sbi
, NULL
)))
1710 set_node_addr(sbi
, &new_ni
, NEW_ADDR
, false);
1711 inc_valid_inode_count(sbi
);
1712 set_page_dirty(ipage
);
1713 f2fs_put_page(ipage
, 1);
1718 * ra_sum_pages() merge contiguous pages into one bio and submit.
1719 * these pre-read pages are allocated in bd_inode's mapping tree.
1721 static int ra_sum_pages(struct f2fs_sb_info
*sbi
, struct page
**pages
,
1722 int start
, int nrpages
)
1724 struct inode
*inode
= sbi
->sb
->s_bdev
->bd_inode
;
1725 struct address_space
*mapping
= inode
->i_mapping
;
1726 int i
, page_idx
= start
;
1727 struct f2fs_io_info fio
= {
1729 .rw
= READ_SYNC
| REQ_META
| REQ_PRIO
1732 for (i
= 0; page_idx
< start
+ nrpages
; page_idx
++, i
++) {
1733 /* alloc page in bd_inode for reading node summary info */
1734 pages
[i
] = grab_cache_page(mapping
, page_idx
);
1737 f2fs_submit_page_mbio(sbi
, pages
[i
], page_idx
, &fio
);
1740 f2fs_submit_merged_bio(sbi
, META
, READ
);
1744 int restore_node_summary(struct f2fs_sb_info
*sbi
,
1745 unsigned int segno
, struct f2fs_summary_block
*sum
)
1747 struct f2fs_node
*rn
;
1748 struct f2fs_summary
*sum_entry
;
1749 struct inode
*inode
= sbi
->sb
->s_bdev
->bd_inode
;
1751 int bio_blocks
= MAX_BIO_BLOCKS(sbi
);
1752 struct page
*pages
[bio_blocks
];
1753 int i
, idx
, last_offset
, nrpages
, err
= 0;
1755 /* scan the node segment */
1756 last_offset
= sbi
->blocks_per_seg
;
1757 addr
= START_BLOCK(sbi
, segno
);
1758 sum_entry
= &sum
->entries
[0];
1760 for (i
= 0; !err
&& i
< last_offset
; i
+= nrpages
, addr
+= nrpages
) {
1761 nrpages
= min(last_offset
- i
, bio_blocks
);
1763 /* readahead node pages */
1764 nrpages
= ra_sum_pages(sbi
, pages
, addr
, nrpages
);
1768 for (idx
= 0; idx
< nrpages
; idx
++) {
1772 lock_page(pages
[idx
]);
1773 if (unlikely(!PageUptodate(pages
[idx
]))) {
1776 rn
= F2FS_NODE(pages
[idx
]);
1777 sum_entry
->nid
= rn
->footer
.nid
;
1778 sum_entry
->version
= 0;
1779 sum_entry
->ofs_in_node
= 0;
1782 unlock_page(pages
[idx
]);
1784 page_cache_release(pages
[idx
]);
1787 invalidate_mapping_pages(inode
->i_mapping
, addr
,
1793 static void remove_nats_in_journal(struct f2fs_sb_info
*sbi
)
1795 struct f2fs_nm_info
*nm_i
= NM_I(sbi
);
1796 struct curseg_info
*curseg
= CURSEG_I(sbi
, CURSEG_HOT_DATA
);
1797 struct f2fs_summary_block
*sum
= curseg
->sum_blk
;
1800 mutex_lock(&curseg
->curseg_mutex
);
1801 for (i
= 0; i
< nats_in_cursum(sum
); i
++) {
1802 struct nat_entry
*ne
;
1803 struct f2fs_nat_entry raw_ne
;
1804 nid_t nid
= le32_to_cpu(nid_in_journal(sum
, i
));
1806 raw_ne
= nat_in_journal(sum
, i
);
1808 write_lock(&nm_i
->nat_tree_lock
);
1809 ne
= __lookup_nat_cache(nm_i
, nid
);
1813 ne
= grab_nat_entry(nm_i
, nid
);
1815 write_unlock(&nm_i
->nat_tree_lock
);
1818 node_info_from_raw_nat(&ne
->ni
, &raw_ne
);
1820 __set_nat_cache_dirty(nm_i
, ne
);
1821 write_unlock(&nm_i
->nat_tree_lock
);
1823 update_nats_in_cursum(sum
, -i
);
1824 mutex_unlock(&curseg
->curseg_mutex
);
1827 static void __adjust_nat_entry_set(struct nat_entry_set
*nes
,
1828 struct list_head
*head
, int max
)
1830 struct nat_entry_set
*cur
;
1832 if (nes
->entry_cnt
>= max
)
1835 list_for_each_entry(cur
, head
, set_list
) {
1836 if (cur
->entry_cnt
>= nes
->entry_cnt
) {
1837 list_add(&nes
->set_list
, cur
->set_list
.prev
);
1842 list_add_tail(&nes
->set_list
, head
);
1845 static void __flush_nat_entry_set(struct f2fs_sb_info
*sbi
,
1846 struct nat_entry_set
*set
)
1848 struct curseg_info
*curseg
= CURSEG_I(sbi
, CURSEG_HOT_DATA
);
1849 struct f2fs_summary_block
*sum
= curseg
->sum_blk
;
1850 nid_t start_nid
= set
->set
* NAT_ENTRY_PER_BLOCK
;
1851 bool to_journal
= true;
1852 struct f2fs_nat_block
*nat_blk
;
1853 struct nat_entry
*ne
, *cur
;
1854 struct page
*page
= NULL
;
1857 * there are two steps to flush nat entries:
1858 * #1, flush nat entries to journal in current hot data summary block.
1859 * #2, flush nat entries to nat page.
1861 if (!__has_cursum_space(sum
, set
->entry_cnt
, NAT_JOURNAL
))
1865 mutex_lock(&curseg
->curseg_mutex
);
1867 page
= get_next_nat_page(sbi
, start_nid
);
1868 nat_blk
= page_address(page
);
1869 f2fs_bug_on(sbi
, !nat_blk
);
1872 /* flush dirty nats in nat entry set */
1873 list_for_each_entry_safe(ne
, cur
, &set
->entry_list
, list
) {
1874 struct f2fs_nat_entry
*raw_ne
;
1875 nid_t nid
= nat_get_nid(ne
);
1878 if (nat_get_blkaddr(ne
) == NEW_ADDR
)
1882 offset
= lookup_journal_in_cursum(sum
,
1883 NAT_JOURNAL
, nid
, 1);
1884 f2fs_bug_on(sbi
, offset
< 0);
1885 raw_ne
= &nat_in_journal(sum
, offset
);
1886 nid_in_journal(sum
, offset
) = cpu_to_le32(nid
);
1888 raw_ne
= &nat_blk
->entries
[nid
- start_nid
];
1890 raw_nat_from_node_info(raw_ne
, &ne
->ni
);
1892 write_lock(&NM_I(sbi
)->nat_tree_lock
);
1894 __clear_nat_cache_dirty(NM_I(sbi
), ne
);
1895 write_unlock(&NM_I(sbi
)->nat_tree_lock
);
1897 if (nat_get_blkaddr(ne
) == NULL_ADDR
)
1898 add_free_nid(sbi
, nid
, false);
1902 mutex_unlock(&curseg
->curseg_mutex
);
1904 f2fs_put_page(page
, 1);
1906 if (!set
->entry_cnt
) {
1907 radix_tree_delete(&NM_I(sbi
)->nat_set_root
, set
->set
);
1908 kmem_cache_free(nat_entry_set_slab
, set
);
1913 * This function is called during the checkpointing process.
1915 void flush_nat_entries(struct f2fs_sb_info
*sbi
)
1917 struct f2fs_nm_info
*nm_i
= NM_I(sbi
);
1918 struct curseg_info
*curseg
= CURSEG_I(sbi
, CURSEG_HOT_DATA
);
1919 struct f2fs_summary_block
*sum
= curseg
->sum_blk
;
1920 struct nat_entry_set
*setvec
[NATVEC_SIZE
];
1921 struct nat_entry_set
*set
, *tmp
;
1927 * if there are no enough space in journal to store dirty nat
1928 * entries, remove all entries from journal and merge them
1929 * into nat entry set.
1931 if (!__has_cursum_space(sum
, nm_i
->dirty_nat_cnt
, NAT_JOURNAL
))
1932 remove_nats_in_journal(sbi
);
1934 if (!nm_i
->dirty_nat_cnt
)
1937 while ((found
= __gang_lookup_nat_set(nm_i
,
1938 set_idx
, NATVEC_SIZE
, setvec
))) {
1940 set_idx
= setvec
[found
- 1]->set
+ 1;
1941 for (idx
= 0; idx
< found
; idx
++)
1942 __adjust_nat_entry_set(setvec
[idx
], &sets
,
1943 MAX_NAT_JENTRIES(sum
));
1946 /* flush dirty nats in nat entry set */
1947 list_for_each_entry_safe(set
, tmp
, &sets
, set_list
)
1948 __flush_nat_entry_set(sbi
, set
);
1950 f2fs_bug_on(sbi
, nm_i
->dirty_nat_cnt
);
1953 static int init_node_manager(struct f2fs_sb_info
*sbi
)
1955 struct f2fs_super_block
*sb_raw
= F2FS_RAW_SUPER(sbi
);
1956 struct f2fs_nm_info
*nm_i
= NM_I(sbi
);
1957 unsigned char *version_bitmap
;
1958 unsigned int nat_segs
, nat_blocks
;
1960 nm_i
->nat_blkaddr
= le32_to_cpu(sb_raw
->nat_blkaddr
);
1962 /* segment_count_nat includes pair segment so divide to 2. */
1963 nat_segs
= le32_to_cpu(sb_raw
->segment_count_nat
) >> 1;
1964 nat_blocks
= nat_segs
<< le32_to_cpu(sb_raw
->log_blocks_per_seg
);
1966 nm_i
->max_nid
= NAT_ENTRY_PER_BLOCK
* nat_blocks
;
1968 /* not used nids: 0, node, meta, (and root counted as valid node) */
1969 nm_i
->available_nids
= nm_i
->max_nid
- F2FS_RESERVED_NODE_NUM
;
1972 nm_i
->ram_thresh
= DEF_RAM_THRESHOLD
;
1974 INIT_RADIX_TREE(&nm_i
->free_nid_root
, GFP_ATOMIC
);
1975 INIT_LIST_HEAD(&nm_i
->free_nid_list
);
1976 INIT_RADIX_TREE(&nm_i
->nat_root
, GFP_ATOMIC
);
1977 INIT_RADIX_TREE(&nm_i
->nat_set_root
, GFP_ATOMIC
);
1978 INIT_LIST_HEAD(&nm_i
->nat_entries
);
1980 mutex_init(&nm_i
->build_lock
);
1981 spin_lock_init(&nm_i
->free_nid_list_lock
);
1982 rwlock_init(&nm_i
->nat_tree_lock
);
1984 nm_i
->next_scan_nid
= le32_to_cpu(sbi
->ckpt
->next_free_nid
);
1985 nm_i
->bitmap_size
= __bitmap_size(sbi
, NAT_BITMAP
);
1986 version_bitmap
= __bitmap_ptr(sbi
, NAT_BITMAP
);
1987 if (!version_bitmap
)
1990 nm_i
->nat_bitmap
= kmemdup(version_bitmap
, nm_i
->bitmap_size
,
1992 if (!nm_i
->nat_bitmap
)
1997 int build_node_manager(struct f2fs_sb_info
*sbi
)
2001 sbi
->nm_info
= kzalloc(sizeof(struct f2fs_nm_info
), GFP_KERNEL
);
2005 err
= init_node_manager(sbi
);
2009 build_free_nids(sbi
);
2013 void destroy_node_manager(struct f2fs_sb_info
*sbi
)
2015 struct f2fs_nm_info
*nm_i
= NM_I(sbi
);
2016 struct free_nid
*i
, *next_i
;
2017 struct nat_entry
*natvec
[NATVEC_SIZE
];
2024 /* destroy free nid list */
2025 spin_lock(&nm_i
->free_nid_list_lock
);
2026 list_for_each_entry_safe(i
, next_i
, &nm_i
->free_nid_list
, list
) {
2027 f2fs_bug_on(sbi
, i
->state
== NID_ALLOC
);
2028 __del_from_free_nid_list(nm_i
, i
);
2030 spin_unlock(&nm_i
->free_nid_list_lock
);
2031 kmem_cache_free(free_nid_slab
, i
);
2032 spin_lock(&nm_i
->free_nid_list_lock
);
2034 f2fs_bug_on(sbi
, nm_i
->fcnt
);
2035 spin_unlock(&nm_i
->free_nid_list_lock
);
2037 /* destroy nat cache */
2038 write_lock(&nm_i
->nat_tree_lock
);
2039 while ((found
= __gang_lookup_nat_cache(nm_i
,
2040 nid
, NATVEC_SIZE
, natvec
))) {
2042 nid
= nat_get_nid(natvec
[found
- 1]) + 1;
2043 for (idx
= 0; idx
< found
; idx
++)
2044 __del_from_nat_cache(nm_i
, natvec
[idx
]);
2046 f2fs_bug_on(sbi
, nm_i
->nat_cnt
);
2047 write_unlock(&nm_i
->nat_tree_lock
);
2049 kfree(nm_i
->nat_bitmap
);
2050 sbi
->nm_info
= NULL
;
2054 int __init
create_node_manager_caches(void)
2056 nat_entry_slab
= f2fs_kmem_cache_create("nat_entry",
2057 sizeof(struct nat_entry
));
2058 if (!nat_entry_slab
)
2061 free_nid_slab
= f2fs_kmem_cache_create("free_nid",
2062 sizeof(struct free_nid
));
2064 goto destory_nat_entry
;
2066 nat_entry_set_slab
= f2fs_kmem_cache_create("nat_entry_set",
2067 sizeof(struct nat_entry_set
));
2068 if (!nat_entry_set_slab
)
2069 goto destory_free_nid
;
2073 kmem_cache_destroy(free_nid_slab
);
2075 kmem_cache_destroy(nat_entry_slab
);
2080 void destroy_node_manager_caches(void)
2082 kmem_cache_destroy(nat_entry_set_slab
);
2083 kmem_cache_destroy(free_nid_slab
);
2084 kmem_cache_destroy(nat_entry_slab
);