2 * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
5 #include <linux/time.h>
7 #include <linux/reiserfs_fs.h>
8 #include <linux/reiserfs_acl.h>
9 #include <linux/reiserfs_xattr.h>
10 #include <linux/exportfs.h>
11 #include <linux/smp_lock.h>
12 #include <linux/pagemap.h>
13 #include <linux/highmem.h>
14 #include <asm/uaccess.h>
15 #include <asm/unaligned.h>
16 #include <linux/buffer_head.h>
17 #include <linux/mpage.h>
18 #include <linux/writeback.h>
19 #include <linux/quotaops.h>
20 #include <linux/swap.h>
22 int reiserfs_commit_write(struct file
*f
, struct page
*page
,
23 unsigned from
, unsigned to
);
24 int reiserfs_prepare_write(struct file
*f
, struct page
*page
,
25 unsigned from
, unsigned to
);
27 void reiserfs_delete_inode(struct inode
*inode
)
29 /* We need blocks for transaction + (user+group) quota update (possibly delete) */
31 JOURNAL_PER_BALANCE_CNT
* 2 +
32 2 * REISERFS_QUOTA_INIT_BLOCKS(inode
->i_sb
);
33 struct reiserfs_transaction_handle th
;
37 if (!is_bad_inode(inode
))
38 dquot_initialize(inode
);
40 truncate_inode_pages(&inode
->i_data
, 0);
42 depth
= reiserfs_write_lock_once(inode
->i_sb
);
44 /* The = 0 happens when we abort creating a new inode for some reason like lack of space.. */
45 if (!(inode
->i_state
& I_NEW
) && INODE_PKEY(inode
)->k_objectid
!= 0) { /* also handles bad_inode case */
46 reiserfs_delete_xattrs(inode
);
48 if (journal_begin(&th
, inode
->i_sb
, jbegin_count
))
50 reiserfs_update_inode_transaction(inode
);
52 reiserfs_discard_prealloc(&th
, inode
);
54 err
= reiserfs_delete_object(&th
, inode
);
56 /* Do quota update inside a transaction for journaled quotas. We must do that
57 * after delete_object so that quota updates go into the same transaction as
58 * stat data deletion */
60 dquot_free_inode(inode
);
62 if (journal_end(&th
, inode
->i_sb
, jbegin_count
))
65 /* check return value from reiserfs_delete_object after
66 * ending the transaction
71 /* all items of file are deleted, so we can remove "save" link */
72 remove_save_link(inode
, 0 /* not truncate */ ); /* we can't do anything
73 * about an error here */
75 /* no object items are in the tree */
79 clear_inode(inode
); /* note this must go after the journal_end to prevent deadlock */
81 reiserfs_write_unlock_once(inode
->i_sb
, depth
);
84 static void _make_cpu_key(struct cpu_key
*key
, int version
, __u32 dirid
,
85 __u32 objectid
, loff_t offset
, int type
, int length
)
87 key
->version
= version
;
89 key
->on_disk_key
.k_dir_id
= dirid
;
90 key
->on_disk_key
.k_objectid
= objectid
;
91 set_cpu_key_k_offset(key
, offset
);
92 set_cpu_key_k_type(key
, type
);
93 key
->key_length
= length
;
96 /* take base of inode_key (it comes from inode always) (dirid, objectid) and version from an inode, set
97 offset and type of key */
98 void make_cpu_key(struct cpu_key
*key
, struct inode
*inode
, loff_t offset
,
101 _make_cpu_key(key
, get_inode_item_key_version(inode
),
102 le32_to_cpu(INODE_PKEY(inode
)->k_dir_id
),
103 le32_to_cpu(INODE_PKEY(inode
)->k_objectid
), offset
, type
,
108 // when key is 0, do not set version and short key
110 inline void make_le_item_head(struct item_head
*ih
, const struct cpu_key
*key
,
112 loff_t offset
, int type
, int length
,
113 int entry_count
/*or ih_free_space */ )
116 ih
->ih_key
.k_dir_id
= cpu_to_le32(key
->on_disk_key
.k_dir_id
);
117 ih
->ih_key
.k_objectid
=
118 cpu_to_le32(key
->on_disk_key
.k_objectid
);
120 put_ih_version(ih
, version
);
121 set_le_ih_k_offset(ih
, offset
);
122 set_le_ih_k_type(ih
, type
);
123 put_ih_item_len(ih
, length
);
124 /* set_ih_free_space (ih, 0); */
125 // for directory items it is entry count, for directs and stat
126 // datas - 0xffff, for indirects - 0
127 put_ih_entry_count(ih
, entry_count
);
131 // FIXME: we might cache recently accessed indirect item
133 // Ugh. Not too eager for that....
134 // I cut the code until such time as I see a convincing argument (benchmark).
135 // I don't want a bloated inode struct..., and I don't like code complexity....
137 /* cutting the code is fine, since it really isn't in use yet and is easy
138 ** to add back in. But, Vladimir has a really good idea here. Think
139 ** about what happens for reading a file. For each page,
140 ** The VFS layer calls reiserfs_readpage, who searches the tree to find
141 ** an indirect item. This indirect item has X number of pointers, where
142 ** X is a big number if we've done the block allocation right. But,
143 ** we only use one or two of these pointers during each call to readpage,
144 ** needlessly researching again later on.
146 ** The size of the cache could be dynamic based on the size of the file.
148 ** I'd also like to see us cache the location the stat data item, since
149 ** we are needlessly researching for that frequently.
154 /* If this page has a file tail in it, and
155 ** it was read in by get_block_create_0, the page data is valid,
156 ** but tail is still sitting in a direct item, and we can't write to
157 ** it. So, look through this page, and check all the mapped buffers
158 ** to make sure they have valid block numbers. Any that don't need
159 ** to be unmapped, so that block_prepare_write will correctly call
160 ** reiserfs_get_block to convert the tail into an unformatted node
162 static inline void fix_tail_page_for_writing(struct page
*page
)
164 struct buffer_head
*head
, *next
, *bh
;
166 if (page
&& page_has_buffers(page
)) {
167 head
= page_buffers(page
);
170 next
= bh
->b_this_page
;
171 if (buffer_mapped(bh
) && bh
->b_blocknr
== 0) {
172 reiserfs_unmap_buffer(bh
);
175 } while (bh
!= head
);
179 /* reiserfs_get_block does not need to allocate a block only if it has been
180 done already or non-hole position has been found in the indirect item */
181 static inline int allocation_needed(int retval
, b_blocknr_t allocated
,
182 struct item_head
*ih
,
183 __le32
* item
, int pos_in_item
)
187 if (retval
== POSITION_FOUND
&& is_indirect_le_ih(ih
) &&
188 get_block_num(item
, pos_in_item
))
193 static inline int indirect_item_found(int retval
, struct item_head
*ih
)
195 return (retval
== POSITION_FOUND
) && is_indirect_le_ih(ih
);
198 static inline void set_block_dev_mapped(struct buffer_head
*bh
,
199 b_blocknr_t block
, struct inode
*inode
)
201 map_bh(bh
, inode
->i_sb
, block
);
205 // files which were created in the earlier version can not be longer,
208 static int file_capable(struct inode
*inode
, sector_t block
)
210 if (get_inode_item_key_version(inode
) != KEY_FORMAT_3_5
|| // it is new file.
211 block
< (1 << (31 - inode
->i_sb
->s_blocksize_bits
))) // old file, but 'block' is inside of 2gb
217 static int restart_transaction(struct reiserfs_transaction_handle
*th
,
218 struct inode
*inode
, struct treepath
*path
)
220 struct super_block
*s
= th
->t_super
;
221 int len
= th
->t_blocks_allocated
;
224 BUG_ON(!th
->t_trans_id
);
225 BUG_ON(!th
->t_refcount
);
229 /* we cannot restart while nested */
230 if (th
->t_refcount
> 1) {
233 reiserfs_update_sd(th
, inode
);
234 err
= journal_end(th
, s
, len
);
236 err
= journal_begin(th
, s
, JOURNAL_PER_BALANCE_CNT
* 6);
238 reiserfs_update_inode_transaction(inode
);
243 // it is called by get_block when create == 0. Returns block number
244 // for 'block'-th logical block of file. When it hits direct item it
245 // returns 0 (being called from bmap) or read direct item into piece
246 // of page (bh_result)
248 // Please improve the english/clarity in the comment above, as it is
249 // hard to understand.
251 static int _get_block_create_0(struct inode
*inode
, sector_t block
,
252 struct buffer_head
*bh_result
, int args
)
254 INITIALIZE_PATH(path
);
256 struct buffer_head
*bh
;
257 struct item_head
*ih
, tmp_ih
;
264 unsigned long offset
;
266 // prepare the key to look for the 'block'-th block of file
267 make_cpu_key(&key
, inode
,
268 (loff_t
) block
* inode
->i_sb
->s_blocksize
+ 1, TYPE_ANY
,
271 result
= search_for_position_by_key(inode
->i_sb
, &key
, &path
);
272 if (result
!= POSITION_FOUND
) {
275 kunmap(bh_result
->b_page
);
276 if (result
== IO_ERROR
)
278 // We do not return -ENOENT if there is a hole but page is uptodate, because it means
279 // That there is some MMAPED data associated with it that is yet to be written to disk.
280 if ((args
& GET_BLOCK_NO_HOLE
)
281 && !PageUptodate(bh_result
->b_page
)) {
287 bh
= get_last_bh(&path
);
289 if (is_indirect_le_ih(ih
)) {
290 __le32
*ind_item
= (__le32
*) B_I_PITEM(bh
, ih
);
292 /* FIXME: here we could cache indirect item or part of it in
293 the inode to avoid search_by_key in case of subsequent
295 blocknr
= get_block_num(ind_item
, path
.pos_in_item
);
298 map_bh(bh_result
, inode
->i_sb
, blocknr
);
299 if (path
.pos_in_item
==
300 ((ih_item_len(ih
) / UNFM_P_SIZE
) - 1)) {
301 set_buffer_boundary(bh_result
);
304 // We do not return -ENOENT if there is a hole but page is uptodate, because it means
305 // That there is some MMAPED data associated with it that is yet to be written to disk.
306 if ((args
& GET_BLOCK_NO_HOLE
)
307 && !PageUptodate(bh_result
->b_page
)) {
313 kunmap(bh_result
->b_page
);
316 // requested data are in direct item(s)
317 if (!(args
& GET_BLOCK_READ_DIRECT
)) {
318 // we are called by bmap. FIXME: we can not map block of file
319 // when it is stored in direct item(s)
322 kunmap(bh_result
->b_page
);
326 /* if we've got a direct item, and the buffer or page was uptodate,
327 ** we don't want to pull data off disk again. skip to the
328 ** end, where we map the buffer and return
330 if (buffer_uptodate(bh_result
)) {
334 ** grab_tail_page can trigger calls to reiserfs_get_block on up to date
335 ** pages without any buffers. If the page is up to date, we don't want
336 ** read old data off disk. Set the up to date bit on the buffer instead
337 ** and jump to the end
339 if (!bh_result
->b_page
|| PageUptodate(bh_result
->b_page
)) {
340 set_buffer_uptodate(bh_result
);
343 // read file tail into part of page
344 offset
= (cpu_key_k_offset(&key
) - 1) & (PAGE_CACHE_SIZE
- 1);
345 copy_item_head(&tmp_ih
, ih
);
347 /* we only want to kmap if we are reading the tail into the page.
348 ** this is not the common case, so we don't kmap until we are
349 ** sure we need to. But, this means the item might move if
353 p
= (char *)kmap(bh_result
->b_page
);
356 memset(p
, 0, inode
->i_sb
->s_blocksize
);
358 if (!is_direct_le_ih(ih
)) {
361 /* make sure we don't read more bytes than actually exist in
362 ** the file. This can happen in odd cases where i_size isn't
363 ** correct, and when direct item padding results in a few
364 ** extra bytes at the end of the direct item
366 if ((le_ih_k_offset(ih
) + path
.pos_in_item
) > inode
->i_size
)
368 if ((le_ih_k_offset(ih
) - 1 + ih_item_len(ih
)) > inode
->i_size
) {
370 inode
->i_size
- (le_ih_k_offset(ih
) - 1) -
374 chars
= ih_item_len(ih
) - path
.pos_in_item
;
376 memcpy(p
, B_I_PITEM(bh
, ih
) + path
.pos_in_item
, chars
);
383 if (PATH_LAST_POSITION(&path
) != (B_NR_ITEMS(bh
) - 1))
384 // we done, if read direct item is not the last item of
385 // node FIXME: we could try to check right delimiting key
386 // to see whether direct item continues in the right
387 // neighbor or rely on i_size
390 // update key to look for the next piece
391 set_cpu_key_k_offset(&key
, cpu_key_k_offset(&key
) + chars
);
392 result
= search_for_position_by_key(inode
->i_sb
, &key
, &path
);
393 if (result
!= POSITION_FOUND
)
394 // i/o error most likely
396 bh
= get_last_bh(&path
);
400 flush_dcache_page(bh_result
->b_page
);
401 kunmap(bh_result
->b_page
);
406 if (result
== IO_ERROR
)
409 /* this buffer has valid data, but isn't valid for io. mapping it to
410 * block #0 tells the rest of reiserfs it just has a tail in it
412 map_bh(bh_result
, inode
->i_sb
, 0);
413 set_buffer_uptodate(bh_result
);
417 // this is called to create file map. So, _get_block_create_0 will not
419 static int reiserfs_bmap(struct inode
*inode
, sector_t block
,
420 struct buffer_head
*bh_result
, int create
)
422 if (!file_capable(inode
, block
))
425 reiserfs_write_lock(inode
->i_sb
);
426 /* do not read the direct item */
427 _get_block_create_0(inode
, block
, bh_result
, 0);
428 reiserfs_write_unlock(inode
->i_sb
);
432 /* special version of get_block that is only used by grab_tail_page right
433 ** now. It is sent to block_prepare_write, and when you try to get a
434 ** block past the end of the file (or a block from a hole) it returns
435 ** -ENOENT instead of a valid buffer. block_prepare_write expects to
436 ** be able to do i/o on the buffers returned, unless an error value
439 ** So, this allows block_prepare_write to be used for reading a single block
440 ** in a page. Where it does not produce a valid page for holes, or past the
441 ** end of the file. This turns out to be exactly what we need for reading
442 ** tails for conversion.
444 ** The point of the wrapper is forcing a certain value for create, even
445 ** though the VFS layer is calling this function with create==1. If you
446 ** don't want to send create == GET_BLOCK_NO_HOLE to reiserfs_get_block,
447 ** don't use this function.
449 static int reiserfs_get_block_create_0(struct inode
*inode
, sector_t block
,
450 struct buffer_head
*bh_result
,
453 return reiserfs_get_block(inode
, block
, bh_result
, GET_BLOCK_NO_HOLE
);
456 /* This is special helper for reiserfs_get_block in case we are executing
457 direct_IO request. */
458 static int reiserfs_get_blocks_direct_io(struct inode
*inode
,
460 struct buffer_head
*bh_result
,
465 bh_result
->b_page
= NULL
;
467 /* We set the b_size before reiserfs_get_block call since it is
468 referenced in convert_tail_for_hole() that may be called from
469 reiserfs_get_block() */
470 bh_result
->b_size
= (1 << inode
->i_blkbits
);
472 ret
= reiserfs_get_block(inode
, iblock
, bh_result
,
473 create
| GET_BLOCK_NO_DANGLE
);
477 /* don't allow direct io onto tail pages */
478 if (buffer_mapped(bh_result
) && bh_result
->b_blocknr
== 0) {
479 /* make sure future calls to the direct io funcs for this offset
480 ** in the file fail by unmapping the buffer
482 clear_buffer_mapped(bh_result
);
485 /* Possible unpacked tail. Flush the data before pages have
487 if (REISERFS_I(inode
)->i_flags
& i_pack_on_close_mask
) {
490 reiserfs_write_lock(inode
->i_sb
);
492 err
= reiserfs_commit_for_inode(inode
);
493 REISERFS_I(inode
)->i_flags
&= ~i_pack_on_close_mask
;
495 reiserfs_write_unlock(inode
->i_sb
);
505 ** helper function for when reiserfs_get_block is called for a hole
506 ** but the file tail is still in a direct item
507 ** bh_result is the buffer head for the hole
508 ** tail_offset is the offset of the start of the tail in the file
510 ** This calls prepare_write, which will start a new transaction
511 ** you should not be in a transaction, or have any paths held when you
514 static int convert_tail_for_hole(struct inode
*inode
,
515 struct buffer_head
*bh_result
,
519 unsigned long tail_end
;
520 unsigned long tail_start
;
521 struct page
*tail_page
;
522 struct page
*hole_page
= bh_result
->b_page
;
525 if ((tail_offset
& (bh_result
->b_size
- 1)) != 1)
528 /* always try to read until the end of the block */
529 tail_start
= tail_offset
& (PAGE_CACHE_SIZE
- 1);
530 tail_end
= (tail_start
| (bh_result
->b_size
- 1)) + 1;
532 index
= tail_offset
>> PAGE_CACHE_SHIFT
;
533 /* hole_page can be zero in case of direct_io, we are sure
534 that we cannot get here if we write with O_DIRECT into
536 if (!hole_page
|| index
!= hole_page
->index
) {
537 tail_page
= grab_cache_page(inode
->i_mapping
, index
);
543 tail_page
= hole_page
;
546 /* we don't have to make sure the conversion did not happen while
547 ** we were locking the page because anyone that could convert
548 ** must first take i_mutex.
550 ** We must fix the tail page for writing because it might have buffers
551 ** that are mapped, but have a block number of 0. This indicates tail
552 ** data that has been read directly into the page, and block_prepare_write
553 ** won't trigger a get_block in this case.
555 fix_tail_page_for_writing(tail_page
);
556 retval
= reiserfs_prepare_write(NULL
, tail_page
, tail_start
, tail_end
);
560 /* tail conversion might change the data in the page */
561 flush_dcache_page(tail_page
);
563 retval
= reiserfs_commit_write(NULL
, tail_page
, tail_start
, tail_end
);
566 if (tail_page
!= hole_page
) {
567 unlock_page(tail_page
);
568 page_cache_release(tail_page
);
574 static inline int _allocate_block(struct reiserfs_transaction_handle
*th
,
577 b_blocknr_t
* allocated_block_nr
,
578 struct treepath
*path
, int flags
)
580 BUG_ON(!th
->t_trans_id
);
582 #ifdef REISERFS_PREALLOCATE
583 if (!(flags
& GET_BLOCK_NO_IMUX
)) {
584 return reiserfs_new_unf_blocknrs2(th
, inode
, allocated_block_nr
,
588 return reiserfs_new_unf_blocknrs(th
, inode
, allocated_block_nr
, path
,
592 int reiserfs_get_block(struct inode
*inode
, sector_t block
,
593 struct buffer_head
*bh_result
, int create
)
595 int repeat
, retval
= 0;
596 b_blocknr_t allocated_block_nr
= 0; // b_blocknr_t is (unsigned) 32 bit int
597 INITIALIZE_PATH(path
);
600 struct buffer_head
*bh
, *unbh
= NULL
;
601 struct item_head
*ih
, tmp_ih
;
606 struct reiserfs_transaction_handle
*th
= NULL
;
607 /* space reserved in transaction batch:
608 . 3 balancings in direct->indirect conversion
609 . 1 block involved into reiserfs_update_sd()
610 XXX in practically impossible worst case direct2indirect()
611 can incur (much) more than 3 balancings.
612 quota update for user, group */
614 JOURNAL_PER_BALANCE_CNT
* 3 + 1 +
615 2 * REISERFS_QUOTA_TRANS_BLOCKS(inode
->i_sb
);
619 (((loff_t
) block
) << inode
->i_sb
->s_blocksize_bits
) + 1;
621 lock_depth
= reiserfs_write_lock_once(inode
->i_sb
);
622 version
= get_inode_item_key_version(inode
);
624 if (!file_capable(inode
, block
)) {
625 reiserfs_write_unlock_once(inode
->i_sb
, lock_depth
);
629 /* if !create, we aren't changing the FS, so we don't need to
630 ** log anything, so we don't need to start a transaction
632 if (!(create
& GET_BLOCK_CREATE
)) {
634 /* find number of block-th logical block of the file */
635 ret
= _get_block_create_0(inode
, block
, bh_result
,
636 create
| GET_BLOCK_READ_DIRECT
);
637 reiserfs_write_unlock_once(inode
->i_sb
, lock_depth
);
641 * if we're already in a transaction, make sure to close
642 * any new transactions we start in this func
644 if ((create
& GET_BLOCK_NO_DANGLE
) ||
645 reiserfs_transaction_running(inode
->i_sb
))
648 /* If file is of such a size, that it might have a tail and tails are enabled
649 ** we should mark it as possibly needing tail packing on close
651 if ((have_large_tails(inode
->i_sb
)
652 && inode
->i_size
< i_block_size(inode
) * 4)
653 || (have_small_tails(inode
->i_sb
)
654 && inode
->i_size
< i_block_size(inode
)))
655 REISERFS_I(inode
)->i_flags
|= i_pack_on_close_mask
;
657 /* set the key of the first byte in the 'block'-th block of file */
658 make_cpu_key(&key
, inode
, new_offset
, TYPE_ANY
, 3 /*key length */ );
659 if ((new_offset
+ inode
->i_sb
->s_blocksize
- 1) > inode
->i_size
) {
661 th
= reiserfs_persistent_transaction(inode
->i_sb
, jbegin_count
);
666 reiserfs_update_inode_transaction(inode
);
670 retval
= search_for_position_by_key(inode
->i_sb
, &key
, &path
);
671 if (retval
== IO_ERROR
) {
676 bh
= get_last_bh(&path
);
678 item
= get_item(&path
);
679 pos_in_item
= path
.pos_in_item
;
681 fs_gen
= get_generation(inode
->i_sb
);
682 copy_item_head(&tmp_ih
, ih
);
684 if (allocation_needed
685 (retval
, allocated_block_nr
, ih
, item
, pos_in_item
)) {
686 /* we have to allocate block for the unformatted node */
693 _allocate_block(th
, block
, inode
, &allocated_block_nr
,
696 if (repeat
== NO_DISK_SPACE
|| repeat
== QUOTA_EXCEEDED
) {
697 /* restart the transaction to give the journal a chance to free
698 ** some blocks. releases the path, so we have to go back to
699 ** research if we succeed on the second try
701 SB_JOURNAL(inode
->i_sb
)->j_next_async_flush
= 1;
702 retval
= restart_transaction(th
, inode
, &path
);
706 _allocate_block(th
, block
, inode
,
707 &allocated_block_nr
, NULL
, create
);
709 if (repeat
!= NO_DISK_SPACE
&& repeat
!= QUOTA_EXCEEDED
) {
712 if (repeat
== QUOTA_EXCEEDED
)
719 if (fs_changed(fs_gen
, inode
->i_sb
)
720 && item_moved(&tmp_ih
, &path
)) {
725 if (indirect_item_found(retval
, ih
)) {
726 b_blocknr_t unfm_ptr
;
727 /* 'block'-th block is in the file already (there is
728 corresponding cell in some indirect item). But it may be
729 zero unformatted node pointer (hole) */
730 unfm_ptr
= get_block_num(item
, pos_in_item
);
732 /* use allocated block to plug the hole */
733 reiserfs_prepare_for_journal(inode
->i_sb
, bh
, 1);
734 if (fs_changed(fs_gen
, inode
->i_sb
)
735 && item_moved(&tmp_ih
, &path
)) {
736 reiserfs_restore_prepared_buffer(inode
->i_sb
,
740 set_buffer_new(bh_result
);
741 if (buffer_dirty(bh_result
)
742 && reiserfs_data_ordered(inode
->i_sb
))
743 reiserfs_add_ordered_list(inode
, bh_result
);
744 put_block_num(item
, pos_in_item
, allocated_block_nr
);
745 unfm_ptr
= allocated_block_nr
;
746 journal_mark_dirty(th
, inode
->i_sb
, bh
);
747 reiserfs_update_sd(th
, inode
);
749 set_block_dev_mapped(bh_result
, unfm_ptr
, inode
);
753 retval
= reiserfs_end_persistent_transaction(th
);
755 reiserfs_write_unlock_once(inode
->i_sb
, lock_depth
);
757 /* the item was found, so new blocks were not added to the file
758 ** there is no need to make sure the inode is updated with this
769 /* desired position is not found or is in the direct item. We have
770 to append file with holes up to 'block'-th block converting
771 direct items to indirect one if necessary */
774 if (is_statdata_le_ih(ih
)) {
776 struct cpu_key tmp_key
;
778 /* indirect item has to be inserted */
779 make_le_item_head(&tmp_ih
, &key
, version
, 1,
780 TYPE_INDIRECT
, UNFM_P_SIZE
,
781 0 /* free_space */ );
783 if (cpu_key_k_offset(&key
) == 1) {
784 /* we are going to add 'block'-th block to the file. Use
785 allocated block for that */
786 unp
= cpu_to_le32(allocated_block_nr
);
787 set_block_dev_mapped(bh_result
,
788 allocated_block_nr
, inode
);
789 set_buffer_new(bh_result
);
793 set_cpu_key_k_offset(&tmp_key
, 1);
794 PATH_LAST_POSITION(&path
)++;
797 reiserfs_insert_item(th
, &path
, &tmp_key
, &tmp_ih
,
798 inode
, (char *)&unp
);
800 reiserfs_free_block(th
, inode
,
801 allocated_block_nr
, 1);
802 goto failure
; // retval == -ENOSPC, -EDQUOT or -EIO or -EEXIST
804 //mark_tail_converted (inode);
805 } else if (is_direct_le_ih(ih
)) {
806 /* direct item has to be converted */
810 ((le_ih_k_offset(ih
) -
811 1) & ~(inode
->i_sb
->s_blocksize
- 1)) + 1;
812 if (tail_offset
== cpu_key_k_offset(&key
)) {
813 /* direct item we just found fits into block we have
814 to map. Convert it into unformatted node: use
815 bh_result for the conversion */
816 set_block_dev_mapped(bh_result
,
817 allocated_block_nr
, inode
);
821 /* we have to padd file tail stored in direct item(s)
822 up to block size and convert it to unformatted
823 node. FIXME: this should also get into page cache */
827 * ugly, but we can only end the transaction if
830 BUG_ON(!th
->t_refcount
);
831 if (th
->t_refcount
== 1) {
833 reiserfs_end_persistent_transaction
841 convert_tail_for_hole(inode
, bh_result
,
844 if (retval
!= -ENOSPC
)
845 reiserfs_error(inode
->i_sb
,
847 "convert tail failed "
848 "inode %lu, error %d",
851 if (allocated_block_nr
) {
852 /* the bitmap, the super, and the stat data == 3 */
854 th
= reiserfs_persistent_transaction(inode
->i_sb
, 3);
856 reiserfs_free_block(th
,
866 direct2indirect(th
, inode
, &path
, unbh
,
869 reiserfs_unmap_buffer(unbh
);
870 reiserfs_free_block(th
, inode
,
871 allocated_block_nr
, 1);
874 /* it is important the set_buffer_uptodate is done after
875 ** the direct2indirect. The buffer might contain valid
876 ** data newer than the data on disk (read by readpage, changed,
877 ** and then sent here by writepage). direct2indirect needs
878 ** to know if unbh was already up to date, so it can decide
879 ** if the data in unbh needs to be replaced with data from
882 set_buffer_uptodate(unbh
);
884 /* unbh->b_page == NULL in case of DIRECT_IO request, this means
885 buffer will disappear shortly, so it should not be added to
888 /* we've converted the tail, so we must
889 ** flush unbh before the transaction commits
891 reiserfs_add_tail_list(inode
, unbh
);
893 /* mark it dirty now to prevent commit_write from adding
894 ** this buffer to the inode's dirty buffer list
897 * AKPM: changed __mark_buffer_dirty to mark_buffer_dirty().
898 * It's still atomic, but it sets the page dirty too,
899 * which makes it eligible for writeback at any time by the
900 * VM (which was also the case with __mark_buffer_dirty())
902 mark_buffer_dirty(unbh
);
905 /* append indirect item with holes if needed, when appending
906 pointer to 'block'-th block use block, which is already
908 struct cpu_key tmp_key
;
909 unp_t unf_single
= 0; // We use this in case we need to allocate only
910 // one block which is a fastpath
912 __u64 max_to_insert
=
913 MAX_ITEM_LEN(inode
->i_sb
->s_blocksize
) /
917 RFALSE(pos_in_item
!= ih_item_len(ih
) / UNFM_P_SIZE
,
918 "vs-804: invalid position for append");
919 /* indirect item has to be appended, set up key of that position */
920 make_cpu_key(&tmp_key
, inode
,
921 le_key_k_offset(version
,
924 inode
->i_sb
->s_blocksize
),
925 //pos_in_item * inode->i_sb->s_blocksize,
926 TYPE_INDIRECT
, 3); // key type is unimportant
928 RFALSE(cpu_key_k_offset(&tmp_key
) > cpu_key_k_offset(&key
),
929 "green-805: invalid offset");
932 ((cpu_key_k_offset(&key
) -
933 cpu_key_k_offset(&tmp_key
)) >> inode
->i_sb
->
936 if (blocks_needed
== 1) {
939 un
= kzalloc(min(blocks_needed
, max_to_insert
) * UNFM_P_SIZE
, GFP_NOFS
);
946 if (blocks_needed
<= max_to_insert
) {
947 /* we are going to add target block to the file. Use allocated
949 un
[blocks_needed
- 1] =
950 cpu_to_le32(allocated_block_nr
);
951 set_block_dev_mapped(bh_result
,
952 allocated_block_nr
, inode
);
953 set_buffer_new(bh_result
);
956 /* paste hole to the indirect item */
957 /* If kmalloc failed, max_to_insert becomes zero and it means we
958 only have space for one block */
960 max_to_insert
? max_to_insert
: 1;
963 reiserfs_paste_into_item(th
, &path
, &tmp_key
, inode
,
968 if (blocks_needed
!= 1)
972 reiserfs_free_block(th
, inode
,
973 allocated_block_nr
, 1);
977 /* We need to mark new file size in case this function will be
978 interrupted/aborted later on. And we may do this only for
981 inode
->i_sb
->s_blocksize
* blocks_needed
;
988 /* this loop could log more blocks than we had originally asked
989 ** for. So, we have to allow the transaction to end if it is
990 ** too big or too full. Update the inode so things are
991 ** consistent if we crash before the function returns
993 ** release the path so that anybody waiting on the path before
994 ** ending their transaction will be able to continue.
996 if (journal_transaction_should_end(th
, th
->t_blocks_allocated
)) {
997 retval
= restart_transaction(th
, inode
, &path
);
1002 * inserting indirect pointers for a hole can take a
1003 * long time. reschedule if needed and also release the write
1006 if (need_resched()) {
1007 reiserfs_write_unlock_once(inode
->i_sb
, lock_depth
);
1009 lock_depth
= reiserfs_write_lock_once(inode
->i_sb
);
1012 retval
= search_for_position_by_key(inode
->i_sb
, &key
, &path
);
1013 if (retval
== IO_ERROR
) {
1017 if (retval
== POSITION_FOUND
) {
1018 reiserfs_warning(inode
->i_sb
, "vs-825",
1019 "%K should not be found", &key
);
1021 if (allocated_block_nr
)
1022 reiserfs_free_block(th
, inode
,
1023 allocated_block_nr
, 1);
1027 bh
= get_last_bh(&path
);
1029 item
= get_item(&path
);
1030 pos_in_item
= path
.pos_in_item
;
1036 if (th
&& (!dangle
|| (retval
&& !th
->t_trans_id
))) {
1039 reiserfs_update_sd(th
, inode
);
1040 err
= reiserfs_end_persistent_transaction(th
);
1045 reiserfs_write_unlock_once(inode
->i_sb
, lock_depth
);
1046 reiserfs_check_path(&path
);
1051 reiserfs_readpages(struct file
*file
, struct address_space
*mapping
,
1052 struct list_head
*pages
, unsigned nr_pages
)
1054 return mpage_readpages(mapping
, pages
, nr_pages
, reiserfs_get_block
);
1057 /* Compute real number of used bytes by file
1058 * Following three functions can go away when we'll have enough space in stat item
1060 static int real_space_diff(struct inode
*inode
, int sd_size
)
1063 loff_t blocksize
= inode
->i_sb
->s_blocksize
;
1065 if (S_ISLNK(inode
->i_mode
) || S_ISDIR(inode
->i_mode
))
1068 /* End of file is also in full block with indirect reference, so round
1069 ** up to the next block.
1071 ** there is just no way to know if the tail is actually packed
1072 ** on the file, so we have to assume it isn't. When we pack the
1073 ** tail, we add 4 bytes to pretend there really is an unformatted
1078 (blocksize
- 1)) >> inode
->i_sb
->s_blocksize_bits
) * UNFM_P_SIZE
+
1083 static inline loff_t
to_real_used_space(struct inode
*inode
, ulong blocks
,
1086 if (S_ISLNK(inode
->i_mode
) || S_ISDIR(inode
->i_mode
)) {
1087 return inode
->i_size
+
1088 (loff_t
) (real_space_diff(inode
, sd_size
));
1090 return ((loff_t
) real_space_diff(inode
, sd_size
)) +
1091 (((loff_t
) blocks
) << 9);
1094 /* Compute number of blocks used by file in ReiserFS counting */
1095 static inline ulong
to_fake_used_blocks(struct inode
*inode
, int sd_size
)
1097 loff_t bytes
= inode_get_bytes(inode
);
1098 loff_t real_space
= real_space_diff(inode
, sd_size
);
1100 /* keeps fsck and non-quota versions of reiserfs happy */
1101 if (S_ISLNK(inode
->i_mode
) || S_ISDIR(inode
->i_mode
)) {
1102 bytes
+= (loff_t
) 511;
1105 /* files from before the quota patch might i_blocks such that
1106 ** bytes < real_space. Deal with that here to prevent it from
1109 if (bytes
< real_space
)
1111 return (bytes
- real_space
) >> 9;
1115 // BAD: new directories have stat data of new type and all other items
1116 // of old type. Version stored in the inode says about body items, so
1117 // in update_stat_data we can not rely on inode, but have to check
1118 // item version directly
1121 // called by read_locked_inode
1122 static void init_inode(struct inode
*inode
, struct treepath
*path
)
1124 struct buffer_head
*bh
;
1125 struct item_head
*ih
;
1127 //int version = ITEM_VERSION_1;
1129 bh
= PATH_PLAST_BUFFER(path
);
1130 ih
= PATH_PITEM_HEAD(path
);
1132 copy_key(INODE_PKEY(inode
), &(ih
->ih_key
));
1134 INIT_LIST_HEAD(&(REISERFS_I(inode
)->i_prealloc_list
));
1135 REISERFS_I(inode
)->i_flags
= 0;
1136 REISERFS_I(inode
)->i_prealloc_block
= 0;
1137 REISERFS_I(inode
)->i_prealloc_count
= 0;
1138 REISERFS_I(inode
)->i_trans_id
= 0;
1139 REISERFS_I(inode
)->i_jl
= NULL
;
1140 mutex_init(&(REISERFS_I(inode
)->i_mmap
));
1141 reiserfs_init_xattr_rwsem(inode
);
1143 if (stat_data_v1(ih
)) {
1144 struct stat_data_v1
*sd
=
1145 (struct stat_data_v1
*)B_I_PITEM(bh
, ih
);
1146 unsigned long blocks
;
1148 set_inode_item_key_version(inode
, KEY_FORMAT_3_5
);
1149 set_inode_sd_version(inode
, STAT_DATA_V1
);
1150 inode
->i_mode
= sd_v1_mode(sd
);
1151 inode
->i_nlink
= sd_v1_nlink(sd
);
1152 inode
->i_uid
= sd_v1_uid(sd
);
1153 inode
->i_gid
= sd_v1_gid(sd
);
1154 inode
->i_size
= sd_v1_size(sd
);
1155 inode
->i_atime
.tv_sec
= sd_v1_atime(sd
);
1156 inode
->i_mtime
.tv_sec
= sd_v1_mtime(sd
);
1157 inode
->i_ctime
.tv_sec
= sd_v1_ctime(sd
);
1158 inode
->i_atime
.tv_nsec
= 0;
1159 inode
->i_ctime
.tv_nsec
= 0;
1160 inode
->i_mtime
.tv_nsec
= 0;
1162 inode
->i_blocks
= sd_v1_blocks(sd
);
1163 inode
->i_generation
= le32_to_cpu(INODE_PKEY(inode
)->k_dir_id
);
1164 blocks
= (inode
->i_size
+ 511) >> 9;
1165 blocks
= _ROUND_UP(blocks
, inode
->i_sb
->s_blocksize
>> 9);
1166 if (inode
->i_blocks
> blocks
) {
1167 // there was a bug in <=3.5.23 when i_blocks could take negative
1168 // values. Starting from 3.5.17 this value could even be stored in
1169 // stat data. For such files we set i_blocks based on file
1170 // size. Just 2 notes: this can be wrong for sparce files. On-disk value will be
1171 // only updated if file's inode will ever change
1172 inode
->i_blocks
= blocks
;
1175 rdev
= sd_v1_rdev(sd
);
1176 REISERFS_I(inode
)->i_first_direct_byte
=
1177 sd_v1_first_direct_byte(sd
);
1178 /* an early bug in the quota code can give us an odd number for the
1179 ** block count. This is incorrect, fix it here.
1181 if (inode
->i_blocks
& 1) {
1184 inode_set_bytes(inode
,
1185 to_real_used_space(inode
, inode
->i_blocks
,
1187 /* nopack is initially zero for v1 objects. For v2 objects,
1188 nopack is initialised from sd_attrs */
1189 REISERFS_I(inode
)->i_flags
&= ~i_nopack_mask
;
1191 // new stat data found, but object may have old items
1192 // (directories and symlinks)
1193 struct stat_data
*sd
= (struct stat_data
*)B_I_PITEM(bh
, ih
);
1195 inode
->i_mode
= sd_v2_mode(sd
);
1196 inode
->i_nlink
= sd_v2_nlink(sd
);
1197 inode
->i_uid
= sd_v2_uid(sd
);
1198 inode
->i_size
= sd_v2_size(sd
);
1199 inode
->i_gid
= sd_v2_gid(sd
);
1200 inode
->i_mtime
.tv_sec
= sd_v2_mtime(sd
);
1201 inode
->i_atime
.tv_sec
= sd_v2_atime(sd
);
1202 inode
->i_ctime
.tv_sec
= sd_v2_ctime(sd
);
1203 inode
->i_ctime
.tv_nsec
= 0;
1204 inode
->i_mtime
.tv_nsec
= 0;
1205 inode
->i_atime
.tv_nsec
= 0;
1206 inode
->i_blocks
= sd_v2_blocks(sd
);
1207 rdev
= sd_v2_rdev(sd
);
1208 if (S_ISCHR(inode
->i_mode
) || S_ISBLK(inode
->i_mode
))
1209 inode
->i_generation
=
1210 le32_to_cpu(INODE_PKEY(inode
)->k_dir_id
);
1212 inode
->i_generation
= sd_v2_generation(sd
);
1214 if (S_ISDIR(inode
->i_mode
) || S_ISLNK(inode
->i_mode
))
1215 set_inode_item_key_version(inode
, KEY_FORMAT_3_5
);
1217 set_inode_item_key_version(inode
, KEY_FORMAT_3_6
);
1218 REISERFS_I(inode
)->i_first_direct_byte
= 0;
1219 set_inode_sd_version(inode
, STAT_DATA_V2
);
1220 inode_set_bytes(inode
,
1221 to_real_used_space(inode
, inode
->i_blocks
,
1223 /* read persistent inode attributes from sd and initalise
1224 generic inode flags from them */
1225 REISERFS_I(inode
)->i_attrs
= sd_v2_attrs(sd
);
1226 sd_attrs_to_i_attrs(sd_v2_attrs(sd
), inode
);
1230 if (S_ISREG(inode
->i_mode
)) {
1231 inode
->i_op
= &reiserfs_file_inode_operations
;
1232 inode
->i_fop
= &reiserfs_file_operations
;
1233 inode
->i_mapping
->a_ops
= &reiserfs_address_space_operations
;
1234 } else if (S_ISDIR(inode
->i_mode
)) {
1235 inode
->i_op
= &reiserfs_dir_inode_operations
;
1236 inode
->i_fop
= &reiserfs_dir_operations
;
1237 } else if (S_ISLNK(inode
->i_mode
)) {
1238 inode
->i_op
= &reiserfs_symlink_inode_operations
;
1239 inode
->i_mapping
->a_ops
= &reiserfs_address_space_operations
;
1241 inode
->i_blocks
= 0;
1242 inode
->i_op
= &reiserfs_special_inode_operations
;
1243 init_special_inode(inode
, inode
->i_mode
, new_decode_dev(rdev
));
1247 // update new stat data with inode fields
1248 static void inode2sd(void *sd
, struct inode
*inode
, loff_t size
)
1250 struct stat_data
*sd_v2
= (struct stat_data
*)sd
;
1253 set_sd_v2_mode(sd_v2
, inode
->i_mode
);
1254 set_sd_v2_nlink(sd_v2
, inode
->i_nlink
);
1255 set_sd_v2_uid(sd_v2
, inode
->i_uid
);
1256 set_sd_v2_size(sd_v2
, size
);
1257 set_sd_v2_gid(sd_v2
, inode
->i_gid
);
1258 set_sd_v2_mtime(sd_v2
, inode
->i_mtime
.tv_sec
);
1259 set_sd_v2_atime(sd_v2
, inode
->i_atime
.tv_sec
);
1260 set_sd_v2_ctime(sd_v2
, inode
->i_ctime
.tv_sec
);
1261 set_sd_v2_blocks(sd_v2
, to_fake_used_blocks(inode
, SD_V2_SIZE
));
1262 if (S_ISCHR(inode
->i_mode
) || S_ISBLK(inode
->i_mode
))
1263 set_sd_v2_rdev(sd_v2
, new_encode_dev(inode
->i_rdev
));
1265 set_sd_v2_generation(sd_v2
, inode
->i_generation
);
1266 flags
= REISERFS_I(inode
)->i_attrs
;
1267 i_attrs_to_sd_attrs(inode
, &flags
);
1268 set_sd_v2_attrs(sd_v2
, flags
);
1271 // used to copy inode's fields to old stat data
1272 static void inode2sd_v1(void *sd
, struct inode
*inode
, loff_t size
)
1274 struct stat_data_v1
*sd_v1
= (struct stat_data_v1
*)sd
;
1276 set_sd_v1_mode(sd_v1
, inode
->i_mode
);
1277 set_sd_v1_uid(sd_v1
, inode
->i_uid
);
1278 set_sd_v1_gid(sd_v1
, inode
->i_gid
);
1279 set_sd_v1_nlink(sd_v1
, inode
->i_nlink
);
1280 set_sd_v1_size(sd_v1
, size
);
1281 set_sd_v1_atime(sd_v1
, inode
->i_atime
.tv_sec
);
1282 set_sd_v1_ctime(sd_v1
, inode
->i_ctime
.tv_sec
);
1283 set_sd_v1_mtime(sd_v1
, inode
->i_mtime
.tv_sec
);
1285 if (S_ISCHR(inode
->i_mode
) || S_ISBLK(inode
->i_mode
))
1286 set_sd_v1_rdev(sd_v1
, new_encode_dev(inode
->i_rdev
));
1288 set_sd_v1_blocks(sd_v1
, to_fake_used_blocks(inode
, SD_V1_SIZE
));
1290 // Sigh. i_first_direct_byte is back
1291 set_sd_v1_first_direct_byte(sd_v1
,
1292 REISERFS_I(inode
)->i_first_direct_byte
);
1295 /* NOTE, you must prepare the buffer head before sending it here,
1296 ** and then log it after the call
1298 static void update_stat_data(struct treepath
*path
, struct inode
*inode
,
1301 struct buffer_head
*bh
;
1302 struct item_head
*ih
;
1304 bh
= PATH_PLAST_BUFFER(path
);
1305 ih
= PATH_PITEM_HEAD(path
);
1307 if (!is_statdata_le_ih(ih
))
1308 reiserfs_panic(inode
->i_sb
, "vs-13065", "key %k, found item %h",
1309 INODE_PKEY(inode
), ih
);
1311 if (stat_data_v1(ih
)) {
1312 // path points to old stat data
1313 inode2sd_v1(B_I_PITEM(bh
, ih
), inode
, size
);
1315 inode2sd(B_I_PITEM(bh
, ih
), inode
, size
);
1321 void reiserfs_update_sd_size(struct reiserfs_transaction_handle
*th
,
1322 struct inode
*inode
, loff_t size
)
1325 INITIALIZE_PATH(path
);
1326 struct buffer_head
*bh
;
1328 struct item_head
*ih
, tmp_ih
;
1331 BUG_ON(!th
->t_trans_id
);
1333 make_cpu_key(&key
, inode
, SD_OFFSET
, TYPE_STAT_DATA
, 3); //key type is unimportant
1337 /* look for the object's stat data */
1338 retval
= search_item(inode
->i_sb
, &key
, &path
);
1339 if (retval
== IO_ERROR
) {
1340 reiserfs_error(inode
->i_sb
, "vs-13050",
1341 "i/o failure occurred trying to "
1342 "update %K stat data", &key
);
1345 if (retval
== ITEM_NOT_FOUND
) {
1346 pos
= PATH_LAST_POSITION(&path
);
1348 if (inode
->i_nlink
== 0) {
1349 /*reiserfs_warning (inode->i_sb, "vs-13050: reiserfs_update_sd: i_nlink == 0, stat data not found"); */
1352 reiserfs_warning(inode
->i_sb
, "vs-13060",
1353 "stat data of object %k (nlink == %d) "
1354 "not found (pos %d)",
1355 INODE_PKEY(inode
), inode
->i_nlink
,
1357 reiserfs_check_path(&path
);
1361 /* sigh, prepare_for_journal might schedule. When it schedules the
1362 ** FS might change. We have to detect that, and loop back to the
1363 ** search if the stat data item has moved
1365 bh
= get_last_bh(&path
);
1367 copy_item_head(&tmp_ih
, ih
);
1368 fs_gen
= get_generation(inode
->i_sb
);
1369 reiserfs_prepare_for_journal(inode
->i_sb
, bh
, 1);
1370 if (fs_changed(fs_gen
, inode
->i_sb
)
1371 && item_moved(&tmp_ih
, &path
)) {
1372 reiserfs_restore_prepared_buffer(inode
->i_sb
, bh
);
1373 continue; /* Stat_data item has been moved after scheduling. */
1377 update_stat_data(&path
, inode
, size
);
1378 journal_mark_dirty(th
, th
->t_super
, bh
);
1383 /* reiserfs_read_locked_inode is called to read the inode off disk, and it
1384 ** does a make_bad_inode when things go wrong. But, we need to make sure
1385 ** and clear the key in the private portion of the inode, otherwise a
1386 ** corresponding iput might try to delete whatever object the inode last
1389 static void reiserfs_make_bad_inode(struct inode
*inode
)
1391 memset(INODE_PKEY(inode
), 0, KEY_SIZE
);
1392 make_bad_inode(inode
);
1396 // initially this function was derived from minix or ext2's analog and
1397 // evolved as the prototype did
1400 int reiserfs_init_locked_inode(struct inode
*inode
, void *p
)
1402 struct reiserfs_iget_args
*args
= (struct reiserfs_iget_args
*)p
;
1403 inode
->i_ino
= args
->objectid
;
1404 INODE_PKEY(inode
)->k_dir_id
= cpu_to_le32(args
->dirid
);
1408 /* looks for stat data in the tree, and fills up the fields of in-core
1409 inode stat data fields */
1410 void reiserfs_read_locked_inode(struct inode
*inode
,
1411 struct reiserfs_iget_args
*args
)
1413 INITIALIZE_PATH(path_to_sd
);
1415 unsigned long dirino
;
1418 dirino
= args
->dirid
;
1420 /* set version 1, version 2 could be used too, because stat data
1421 key is the same in both versions */
1422 key
.version
= KEY_FORMAT_3_5
;
1423 key
.on_disk_key
.k_dir_id
= dirino
;
1424 key
.on_disk_key
.k_objectid
= inode
->i_ino
;
1425 key
.on_disk_key
.k_offset
= 0;
1426 key
.on_disk_key
.k_type
= 0;
1428 /* look for the object's stat data */
1429 retval
= search_item(inode
->i_sb
, &key
, &path_to_sd
);
1430 if (retval
== IO_ERROR
) {
1431 reiserfs_error(inode
->i_sb
, "vs-13070",
1432 "i/o failure occurred trying to find "
1433 "stat data of %K", &key
);
1434 reiserfs_make_bad_inode(inode
);
1437 if (retval
!= ITEM_FOUND
) {
1438 /* a stale NFS handle can trigger this without it being an error */
1439 pathrelse(&path_to_sd
);
1440 reiserfs_make_bad_inode(inode
);
1445 init_inode(inode
, &path_to_sd
);
1447 /* It is possible that knfsd is trying to access inode of a file
1448 that is being removed from the disk by some other thread. As we
1449 update sd on unlink all that is required is to check for nlink
1450 here. This bug was first found by Sizif when debugging
1451 SquidNG/Butterfly, forgotten, and found again after Philippe
1452 Gramoulle <philippe.gramoulle@mmania.com> reproduced it.
1454 More logical fix would require changes in fs/inode.c:iput() to
1455 remove inode from hash-table _after_ fs cleaned disk stuff up and
1456 in iget() to return NULL if I_FREEING inode is found in
1458 /* Currently there is one place where it's ok to meet inode with
1459 nlink==0: processing of open-unlinked and half-truncated files
1460 during mount (fs/reiserfs/super.c:finish_unfinished()). */
1461 if ((inode
->i_nlink
== 0) &&
1462 !REISERFS_SB(inode
->i_sb
)->s_is_unlinked_ok
) {
1463 reiserfs_warning(inode
->i_sb
, "vs-13075",
1464 "dead inode read from disk %K. "
1465 "This is likely to be race with knfsd. Ignore",
1467 reiserfs_make_bad_inode(inode
);
1470 reiserfs_check_path(&path_to_sd
); /* init inode should be relsing */
1475 * reiserfs_find_actor() - "find actor" reiserfs supplies to iget5_locked().
1477 * @inode: inode from hash table to check
1478 * @opaque: "cookie" passed to iget5_locked(). This is &reiserfs_iget_args.
1480 * This function is called by iget5_locked() to distinguish reiserfs inodes
1481 * having the same inode numbers. Such inodes can only exist due to some
1482 * error condition. One of them should be bad. Inodes with identical
1483 * inode numbers (objectids) are distinguished by parent directory ids.
1486 int reiserfs_find_actor(struct inode
*inode
, void *opaque
)
1488 struct reiserfs_iget_args
*args
;
1491 /* args is already in CPU order */
1492 return (inode
->i_ino
== args
->objectid
) &&
1493 (le32_to_cpu(INODE_PKEY(inode
)->k_dir_id
) == args
->dirid
);
1496 struct inode
*reiserfs_iget(struct super_block
*s
, const struct cpu_key
*key
)
1498 struct inode
*inode
;
1499 struct reiserfs_iget_args args
;
1501 args
.objectid
= key
->on_disk_key
.k_objectid
;
1502 args
.dirid
= key
->on_disk_key
.k_dir_id
;
1503 reiserfs_write_unlock(s
);
1504 inode
= iget5_locked(s
, key
->on_disk_key
.k_objectid
,
1505 reiserfs_find_actor
, reiserfs_init_locked_inode
,
1507 reiserfs_write_lock(s
);
1509 return ERR_PTR(-ENOMEM
);
1511 if (inode
->i_state
& I_NEW
) {
1512 reiserfs_read_locked_inode(inode
, &args
);
1513 unlock_new_inode(inode
);
1516 if (comp_short_keys(INODE_PKEY(inode
), key
) || is_bad_inode(inode
)) {
1517 /* either due to i/o error or a stale NFS handle */
1524 static struct dentry
*reiserfs_get_dentry(struct super_block
*sb
,
1525 u32 objectid
, u32 dir_id
, u32 generation
)
1529 struct inode
*inode
;
1531 key
.on_disk_key
.k_objectid
= objectid
;
1532 key
.on_disk_key
.k_dir_id
= dir_id
;
1533 reiserfs_write_lock(sb
);
1534 inode
= reiserfs_iget(sb
, &key
);
1535 if (inode
&& !IS_ERR(inode
) && generation
!= 0 &&
1536 generation
!= inode
->i_generation
) {
1540 reiserfs_write_unlock(sb
);
1542 return d_obtain_alias(inode
);
1545 struct dentry
*reiserfs_fh_to_dentry(struct super_block
*sb
, struct fid
*fid
,
1546 int fh_len
, int fh_type
)
1548 /* fhtype happens to reflect the number of u32s encoded.
1549 * due to a bug in earlier code, fhtype might indicate there
1550 * are more u32s then actually fitted.
1551 * so if fhtype seems to be more than len, reduce fhtype.
1553 * 2 - objectid + dir_id - legacy support
1554 * 3 - objectid + dir_id + generation
1555 * 4 - objectid + dir_id + objectid and dirid of parent - legacy
1556 * 5 - objectid + dir_id + generation + objectid and dirid of parent
1557 * 6 - as above plus generation of directory
1558 * 6 does not fit in NFSv2 handles
1560 if (fh_type
> fh_len
) {
1561 if (fh_type
!= 6 || fh_len
!= 5)
1562 reiserfs_warning(sb
, "reiserfs-13077",
1563 "nfsd/reiserfs, fhtype=%d, len=%d - odd",
1568 return reiserfs_get_dentry(sb
, fid
->raw
[0], fid
->raw
[1],
1569 (fh_type
== 3 || fh_type
>= 5) ? fid
->raw
[2] : 0);
1572 struct dentry
*reiserfs_fh_to_parent(struct super_block
*sb
, struct fid
*fid
,
1573 int fh_len
, int fh_type
)
1578 return reiserfs_get_dentry(sb
,
1579 (fh_type
>= 5) ? fid
->raw
[3] : fid
->raw
[2],
1580 (fh_type
>= 5) ? fid
->raw
[4] : fid
->raw
[3],
1581 (fh_type
== 6) ? fid
->raw
[5] : 0);
1584 int reiserfs_encode_fh(struct dentry
*dentry
, __u32
* data
, int *lenp
,
1587 struct inode
*inode
= dentry
->d_inode
;
1593 data
[0] = inode
->i_ino
;
1594 data
[1] = le32_to_cpu(INODE_PKEY(inode
)->k_dir_id
);
1595 data
[2] = inode
->i_generation
;
1597 /* no room for directory info? return what we've stored so far */
1598 if (maxlen
< 5 || !need_parent
)
1601 spin_lock(&dentry
->d_lock
);
1602 inode
= dentry
->d_parent
->d_inode
;
1603 data
[3] = inode
->i_ino
;
1604 data
[4] = le32_to_cpu(INODE_PKEY(inode
)->k_dir_id
);
1607 data
[5] = inode
->i_generation
;
1610 spin_unlock(&dentry
->d_lock
);
1614 /* looks for stat data, then copies fields to it, marks the buffer
1615 containing stat data as dirty */
1616 /* reiserfs inodes are never really dirty, since the dirty inode call
1617 ** always logs them. This call allows the VFS inode marking routines
1618 ** to properly mark inodes for datasync and such, but only actually
1619 ** does something when called for a synchronous update.
1621 int reiserfs_write_inode(struct inode
*inode
, struct writeback_control
*wbc
)
1623 struct reiserfs_transaction_handle th
;
1624 int jbegin_count
= 1;
1626 if (inode
->i_sb
->s_flags
& MS_RDONLY
)
1628 /* memory pressure can sometimes initiate write_inode calls with sync == 1,
1629 ** these cases are just when the system needs ram, not when the
1630 ** inode needs to reach disk for safety, and they can safely be
1631 ** ignored because the altered inode has already been logged.
1633 if (wbc
->sync_mode
== WB_SYNC_ALL
&& !(current
->flags
& PF_MEMALLOC
)) {
1634 reiserfs_write_lock(inode
->i_sb
);
1635 if (!journal_begin(&th
, inode
->i_sb
, jbegin_count
)) {
1636 reiserfs_update_sd(&th
, inode
);
1637 journal_end_sync(&th
, inode
->i_sb
, jbegin_count
);
1639 reiserfs_write_unlock(inode
->i_sb
);
1644 /* stat data of new object is inserted already, this inserts the item
1645 containing "." and ".." entries */
1646 static int reiserfs_new_directory(struct reiserfs_transaction_handle
*th
,
1647 struct inode
*inode
,
1648 struct item_head
*ih
, struct treepath
*path
,
1651 struct super_block
*sb
= th
->t_super
;
1652 char empty_dir
[EMPTY_DIR_SIZE
];
1653 char *body
= empty_dir
;
1657 BUG_ON(!th
->t_trans_id
);
1659 _make_cpu_key(&key
, KEY_FORMAT_3_5
, le32_to_cpu(ih
->ih_key
.k_dir_id
),
1660 le32_to_cpu(ih
->ih_key
.k_objectid
), DOT_OFFSET
,
1661 TYPE_DIRENTRY
, 3 /*key length */ );
1663 /* compose item head for new item. Directories consist of items of
1664 old type (ITEM_VERSION_1). Do not set key (second arg is 0), it
1665 is done by reiserfs_new_inode */
1666 if (old_format_only(sb
)) {
1667 make_le_item_head(ih
, NULL
, KEY_FORMAT_3_5
, DOT_OFFSET
,
1668 TYPE_DIRENTRY
, EMPTY_DIR_SIZE_V1
, 2);
1670 make_empty_dir_item_v1(body
, ih
->ih_key
.k_dir_id
,
1671 ih
->ih_key
.k_objectid
,
1672 INODE_PKEY(dir
)->k_dir_id
,
1673 INODE_PKEY(dir
)->k_objectid
);
1675 make_le_item_head(ih
, NULL
, KEY_FORMAT_3_5
, DOT_OFFSET
,
1676 TYPE_DIRENTRY
, EMPTY_DIR_SIZE
, 2);
1678 make_empty_dir_item(body
, ih
->ih_key
.k_dir_id
,
1679 ih
->ih_key
.k_objectid
,
1680 INODE_PKEY(dir
)->k_dir_id
,
1681 INODE_PKEY(dir
)->k_objectid
);
1684 /* look for place in the tree for new item */
1685 retval
= search_item(sb
, &key
, path
);
1686 if (retval
== IO_ERROR
) {
1687 reiserfs_error(sb
, "vs-13080",
1688 "i/o failure occurred creating new directory");
1691 if (retval
== ITEM_FOUND
) {
1693 reiserfs_warning(sb
, "vs-13070",
1694 "object with this key exists (%k)",
1699 /* insert item, that is empty directory item */
1700 return reiserfs_insert_item(th
, path
, &key
, ih
, inode
, body
);
1703 /* stat data of object has been inserted, this inserts the item
1704 containing the body of symlink */
1705 static int reiserfs_new_symlink(struct reiserfs_transaction_handle
*th
, struct inode
*inode
, /* Inode of symlink */
1706 struct item_head
*ih
,
1707 struct treepath
*path
, const char *symname
,
1710 struct super_block
*sb
= th
->t_super
;
1714 BUG_ON(!th
->t_trans_id
);
1716 _make_cpu_key(&key
, KEY_FORMAT_3_5
,
1717 le32_to_cpu(ih
->ih_key
.k_dir_id
),
1718 le32_to_cpu(ih
->ih_key
.k_objectid
),
1719 1, TYPE_DIRECT
, 3 /*key length */ );
1721 make_le_item_head(ih
, NULL
, KEY_FORMAT_3_5
, 1, TYPE_DIRECT
, item_len
,
1722 0 /*free_space */ );
1724 /* look for place in the tree for new item */
1725 retval
= search_item(sb
, &key
, path
);
1726 if (retval
== IO_ERROR
) {
1727 reiserfs_error(sb
, "vs-13080",
1728 "i/o failure occurred creating new symlink");
1731 if (retval
== ITEM_FOUND
) {
1733 reiserfs_warning(sb
, "vs-13080",
1734 "object with this key exists (%k)",
1739 /* insert item, that is body of symlink */
1740 return reiserfs_insert_item(th
, path
, &key
, ih
, inode
, symname
);
1743 /* inserts the stat data into the tree, and then calls
1744 reiserfs_new_directory (to insert ".", ".." item if new object is
1745 directory) or reiserfs_new_symlink (to insert symlink body if new
1746 object is symlink) or nothing (if new object is regular file)
1748 NOTE! uid and gid must already be set in the inode. If we return
1749 non-zero due to an error, we have to drop the quota previously allocated
1750 for the fresh inode. This can only be done outside a transaction, so
1751 if we return non-zero, we also end the transaction. */
1752 int reiserfs_new_inode(struct reiserfs_transaction_handle
*th
,
1753 struct inode
*dir
, int mode
, const char *symname
,
1754 /* 0 for regular, EMTRY_DIR_SIZE for dirs,
1755 strlen (symname) for symlinks) */
1756 loff_t i_size
, struct dentry
*dentry
,
1757 struct inode
*inode
,
1758 struct reiserfs_security_handle
*security
)
1760 struct super_block
*sb
;
1761 struct reiserfs_iget_args args
;
1762 INITIALIZE_PATH(path_to_key
);
1764 struct item_head ih
;
1765 struct stat_data sd
;
1769 BUG_ON(!th
->t_trans_id
);
1771 dquot_initialize(inode
);
1772 err
= dquot_alloc_inode(inode
);
1775 if (!dir
->i_nlink
) {
1782 /* item head of new item */
1783 ih
.ih_key
.k_dir_id
= reiserfs_choose_packing(dir
);
1784 ih
.ih_key
.k_objectid
= cpu_to_le32(reiserfs_get_unused_objectid(th
));
1785 if (!ih
.ih_key
.k_objectid
) {
1789 args
.objectid
= inode
->i_ino
= le32_to_cpu(ih
.ih_key
.k_objectid
);
1790 if (old_format_only(sb
))
1791 make_le_item_head(&ih
, NULL
, KEY_FORMAT_3_5
, SD_OFFSET
,
1792 TYPE_STAT_DATA
, SD_V1_SIZE
, MAX_US_INT
);
1794 make_le_item_head(&ih
, NULL
, KEY_FORMAT_3_6
, SD_OFFSET
,
1795 TYPE_STAT_DATA
, SD_SIZE
, MAX_US_INT
);
1796 memcpy(INODE_PKEY(inode
), &(ih
.ih_key
), KEY_SIZE
);
1797 args
.dirid
= le32_to_cpu(ih
.ih_key
.k_dir_id
);
1798 if (insert_inode_locked4(inode
, args
.objectid
,
1799 reiserfs_find_actor
, &args
) < 0) {
1803 if (old_format_only(sb
))
1804 /* not a perfect generation count, as object ids can be reused, but
1805 ** this is as good as reiserfs can do right now.
1806 ** note that the private part of inode isn't filled in yet, we have
1807 ** to use the directory.
1809 inode
->i_generation
= le32_to_cpu(INODE_PKEY(dir
)->k_objectid
);
1811 #if defined( USE_INODE_GENERATION_COUNTER )
1812 inode
->i_generation
=
1813 le32_to_cpu(REISERFS_SB(sb
)->s_rs
->s_inode_generation
);
1815 inode
->i_generation
= ++event
;
1818 /* fill stat data */
1819 inode
->i_nlink
= (S_ISDIR(mode
) ? 2 : 1);
1821 /* uid and gid must already be set by the caller for quota init */
1823 /* symlink cannot be immutable or append only, right? */
1824 if (S_ISLNK(inode
->i_mode
))
1825 inode
->i_flags
&= ~(S_IMMUTABLE
| S_APPEND
);
1827 inode
->i_mtime
= inode
->i_atime
= inode
->i_ctime
= CURRENT_TIME_SEC
;
1828 inode
->i_size
= i_size
;
1829 inode
->i_blocks
= 0;
1831 REISERFS_I(inode
)->i_first_direct_byte
= S_ISLNK(mode
) ? 1 :
1832 U32_MAX
/*NO_BYTES_IN_DIRECT_ITEM */ ;
1834 INIT_LIST_HEAD(&(REISERFS_I(inode
)->i_prealloc_list
));
1835 REISERFS_I(inode
)->i_flags
= 0;
1836 REISERFS_I(inode
)->i_prealloc_block
= 0;
1837 REISERFS_I(inode
)->i_prealloc_count
= 0;
1838 REISERFS_I(inode
)->i_trans_id
= 0;
1839 REISERFS_I(inode
)->i_jl
= NULL
;
1840 REISERFS_I(inode
)->i_attrs
=
1841 REISERFS_I(dir
)->i_attrs
& REISERFS_INHERIT_MASK
;
1842 sd_attrs_to_i_attrs(REISERFS_I(inode
)->i_attrs
, inode
);
1843 mutex_init(&(REISERFS_I(inode
)->i_mmap
));
1844 reiserfs_init_xattr_rwsem(inode
);
1846 /* key to search for correct place for new stat data */
1847 _make_cpu_key(&key
, KEY_FORMAT_3_6
, le32_to_cpu(ih
.ih_key
.k_dir_id
),
1848 le32_to_cpu(ih
.ih_key
.k_objectid
), SD_OFFSET
,
1849 TYPE_STAT_DATA
, 3 /*key length */ );
1851 /* find proper place for inserting of stat data */
1852 retval
= search_item(sb
, &key
, &path_to_key
);
1853 if (retval
== IO_ERROR
) {
1857 if (retval
== ITEM_FOUND
) {
1858 pathrelse(&path_to_key
);
1862 if (old_format_only(sb
)) {
1863 if (inode
->i_uid
& ~0xffff || inode
->i_gid
& ~0xffff) {
1864 pathrelse(&path_to_key
);
1865 /* i_uid or i_gid is too big to be stored in stat data v3.5 */
1869 inode2sd_v1(&sd
, inode
, inode
->i_size
);
1871 inode2sd(&sd
, inode
, inode
->i_size
);
1873 // store in in-core inode the key of stat data and version all
1874 // object items will have (directory items will have old offset
1875 // format, other new objects will consist of new items)
1876 if (old_format_only(sb
) || S_ISDIR(mode
) || S_ISLNK(mode
))
1877 set_inode_item_key_version(inode
, KEY_FORMAT_3_5
);
1879 set_inode_item_key_version(inode
, KEY_FORMAT_3_6
);
1880 if (old_format_only(sb
))
1881 set_inode_sd_version(inode
, STAT_DATA_V1
);
1883 set_inode_sd_version(inode
, STAT_DATA_V2
);
1885 /* insert the stat data into the tree */
1886 #ifdef DISPLACE_NEW_PACKING_LOCALITIES
1887 if (REISERFS_I(dir
)->new_packing_locality
)
1888 th
->displace_new_blocks
= 1;
1891 reiserfs_insert_item(th
, &path_to_key
, &key
, &ih
, inode
,
1895 reiserfs_check_path(&path_to_key
);
1898 #ifdef DISPLACE_NEW_PACKING_LOCALITIES
1899 if (!th
->displace_new_blocks
)
1900 REISERFS_I(dir
)->new_packing_locality
= 0;
1902 if (S_ISDIR(mode
)) {
1903 /* insert item with "." and ".." */
1905 reiserfs_new_directory(th
, inode
, &ih
, &path_to_key
, dir
);
1908 if (S_ISLNK(mode
)) {
1909 /* insert body of symlink */
1910 if (!old_format_only(sb
))
1911 i_size
= ROUND_UP(i_size
);
1913 reiserfs_new_symlink(th
, inode
, &ih
, &path_to_key
, symname
,
1918 reiserfs_check_path(&path_to_key
);
1919 journal_end(th
, th
->t_super
, th
->t_blocks_allocated
);
1920 goto out_inserted_sd
;
1923 if (reiserfs_posixacl(inode
->i_sb
)) {
1924 retval
= reiserfs_inherit_default_acl(th
, dir
, dentry
, inode
);
1927 reiserfs_check_path(&path_to_key
);
1928 journal_end(th
, th
->t_super
, th
->t_blocks_allocated
);
1929 goto out_inserted_sd
;
1931 } else if (inode
->i_sb
->s_flags
& MS_POSIXACL
) {
1932 reiserfs_warning(inode
->i_sb
, "jdm-13090",
1933 "ACLs aren't enabled in the fs, "
1934 "but vfs thinks they are!");
1935 } else if (IS_PRIVATE(dir
))
1936 inode
->i_flags
|= S_PRIVATE
;
1938 if (security
->name
) {
1939 retval
= reiserfs_security_write(th
, inode
, security
);
1942 reiserfs_check_path(&path_to_key
);
1943 retval
= journal_end(th
, th
->t_super
,
1944 th
->t_blocks_allocated
);
1947 goto out_inserted_sd
;
1951 reiserfs_update_sd(th
, inode
);
1952 reiserfs_check_path(&path_to_key
);
1956 /* it looks like you can easily compress these two goto targets into
1957 * one. Keeping it like this doesn't actually hurt anything, and they
1958 * are place holders for what the quota code actually needs.
1961 /* Invalidate the object, nothing was inserted yet */
1962 INODE_PKEY(inode
)->k_objectid
= 0;
1964 /* Quota change must be inside a transaction for journaling */
1965 dquot_free_inode(inode
);
1968 journal_end(th
, th
->t_super
, th
->t_blocks_allocated
);
1969 /* Drop can be outside and it needs more credits so it's better to have it outside */
1971 inode
->i_flags
|= S_NOQUOTA
;
1972 make_bad_inode(inode
);
1976 th
->t_trans_id
= 0; /* so the caller can't use this handle later */
1977 unlock_new_inode(inode
); /* OK to do even if we hadn't locked it */
1983 ** finds the tail page in the page cache,
1984 ** reads the last block in.
1986 ** On success, page_result is set to a locked, pinned page, and bh_result
1987 ** is set to an up to date buffer for the last block in the file. returns 0.
1989 ** tail conversion is not done, so bh_result might not be valid for writing
1990 ** check buffer_mapped(bh_result) and bh_result->b_blocknr != 0 before
1991 ** trying to write the block.
1993 ** on failure, nonzero is returned, page_result and bh_result are untouched.
1995 static int grab_tail_page(struct inode
*inode
,
1996 struct page
**page_result
,
1997 struct buffer_head
**bh_result
)
2000 /* we want the page with the last byte in the file,
2001 ** not the page that will hold the next byte for appending
2003 unsigned long index
= (inode
->i_size
- 1) >> PAGE_CACHE_SHIFT
;
2004 unsigned long pos
= 0;
2005 unsigned long start
= 0;
2006 unsigned long blocksize
= inode
->i_sb
->s_blocksize
;
2007 unsigned long offset
= (inode
->i_size
) & (PAGE_CACHE_SIZE
- 1);
2008 struct buffer_head
*bh
;
2009 struct buffer_head
*head
;
2013 /* we know that we are only called with inode->i_size > 0.
2014 ** we also know that a file tail can never be as big as a block
2015 ** If i_size % blocksize == 0, our file is currently block aligned
2016 ** and it won't need converting or zeroing after a truncate.
2018 if ((offset
& (blocksize
- 1)) == 0) {
2021 page
= grab_cache_page(inode
->i_mapping
, index
);
2026 /* start within the page of the last block in the file */
2027 start
= (offset
/ blocksize
) * blocksize
;
2029 error
= block_prepare_write(page
, start
, offset
,
2030 reiserfs_get_block_create_0
);
2034 head
= page_buffers(page
);
2040 bh
= bh
->b_this_page
;
2042 } while (bh
!= head
);
2044 if (!buffer_uptodate(bh
)) {
2045 /* note, this should never happen, prepare_write should
2046 ** be taking care of this for us. If the buffer isn't up to date,
2047 ** I've screwed up the code to find the buffer, or the code to
2048 ** call prepare_write
2050 reiserfs_error(inode
->i_sb
, "clm-6000",
2051 "error reading block %lu", bh
->b_blocknr
);
2056 *page_result
= page
;
2063 page_cache_release(page
);
2068 ** vfs version of truncate file. Must NOT be called with
2069 ** a transaction already started.
2071 ** some code taken from block_truncate_page
2073 int reiserfs_truncate_file(struct inode
*inode
, int update_timestamps
)
2075 struct reiserfs_transaction_handle th
;
2076 /* we want the offset for the first byte after the end of the file */
2077 unsigned long offset
= inode
->i_size
& (PAGE_CACHE_SIZE
- 1);
2078 unsigned blocksize
= inode
->i_sb
->s_blocksize
;
2080 struct page
*page
= NULL
;
2082 struct buffer_head
*bh
= NULL
;
2086 lock_depth
= reiserfs_write_lock_once(inode
->i_sb
);
2088 if (inode
->i_size
> 0) {
2089 error
= grab_tail_page(inode
, &page
, &bh
);
2091 // -ENOENT means we truncated past the end of the file,
2092 // and get_block_create_0 could not find a block to read in,
2094 if (error
!= -ENOENT
)
2095 reiserfs_error(inode
->i_sb
, "clm-6001",
2096 "grab_tail_page failed %d",
2103 /* so, if page != NULL, we have a buffer head for the offset at
2104 ** the end of the file. if the bh is mapped, and bh->b_blocknr != 0,
2105 ** then we have an unformatted node. Otherwise, we have a direct item,
2106 ** and no zeroing is required on disk. We zero after the truncate,
2107 ** because the truncate might pack the item anyway
2108 ** (it will unmap bh if it packs).
2110 /* it is enough to reserve space in transaction for 2 balancings:
2111 one for "save" link adding and another for the first
2112 cut_from_item. 1 is for update_sd */
2113 error
= journal_begin(&th
, inode
->i_sb
,
2114 JOURNAL_PER_BALANCE_CNT
* 2 + 1);
2117 reiserfs_update_inode_transaction(inode
);
2118 if (update_timestamps
)
2119 /* we are doing real truncate: if the system crashes before the last
2120 transaction of truncating gets committed - on reboot the file
2121 either appears truncated properly or not truncated at all */
2122 add_save_link(&th
, inode
, 1);
2123 err2
= reiserfs_do_truncate(&th
, inode
, page
, update_timestamps
);
2125 journal_end(&th
, inode
->i_sb
, JOURNAL_PER_BALANCE_CNT
* 2 + 1);
2129 /* check reiserfs_do_truncate after ending the transaction */
2135 if (update_timestamps
) {
2136 error
= remove_save_link(inode
, 1 /* truncate */);
2142 length
= offset
& (blocksize
- 1);
2143 /* if we are not on a block boundary */
2145 length
= blocksize
- length
;
2146 zero_user(page
, offset
, length
);
2147 if (buffer_mapped(bh
) && bh
->b_blocknr
!= 0) {
2148 mark_buffer_dirty(bh
);
2152 page_cache_release(page
);
2155 reiserfs_write_unlock_once(inode
->i_sb
, lock_depth
);
2161 page_cache_release(page
);
2164 reiserfs_write_unlock_once(inode
->i_sb
, lock_depth
);
2169 static int map_block_for_writepage(struct inode
*inode
,
2170 struct buffer_head
*bh_result
,
2171 unsigned long block
)
2173 struct reiserfs_transaction_handle th
;
2175 struct item_head tmp_ih
;
2176 struct item_head
*ih
;
2177 struct buffer_head
*bh
;
2180 INITIALIZE_PATH(path
);
2182 int jbegin_count
= JOURNAL_PER_BALANCE_CNT
;
2183 loff_t byte_offset
= ((loff_t
)block
<< inode
->i_sb
->s_blocksize_bits
)+1;
2185 int use_get_block
= 0;
2186 int bytes_copied
= 0;
2188 int trans_running
= 0;
2190 /* catch places below that try to log something without starting a trans */
2193 if (!buffer_uptodate(bh_result
)) {
2197 kmap(bh_result
->b_page
);
2199 reiserfs_write_lock(inode
->i_sb
);
2200 make_cpu_key(&key
, inode
, byte_offset
, TYPE_ANY
, 3);
2203 retval
= search_for_position_by_key(inode
->i_sb
, &key
, &path
);
2204 if (retval
!= POSITION_FOUND
) {
2209 bh
= get_last_bh(&path
);
2211 item
= get_item(&path
);
2212 pos_in_item
= path
.pos_in_item
;
2214 /* we've found an unformatted node */
2215 if (indirect_item_found(retval
, ih
)) {
2216 if (bytes_copied
> 0) {
2217 reiserfs_warning(inode
->i_sb
, "clm-6002",
2218 "bytes_copied %d", bytes_copied
);
2220 if (!get_block_num(item
, pos_in_item
)) {
2221 /* crap, we are writing to a hole */
2225 set_block_dev_mapped(bh_result
,
2226 get_block_num(item
, pos_in_item
), inode
);
2227 } else if (is_direct_le_ih(ih
)) {
2229 p
= page_address(bh_result
->b_page
);
2230 p
+= (byte_offset
- 1) & (PAGE_CACHE_SIZE
- 1);
2231 copy_size
= ih_item_len(ih
) - pos_in_item
;
2233 fs_gen
= get_generation(inode
->i_sb
);
2234 copy_item_head(&tmp_ih
, ih
);
2236 if (!trans_running
) {
2237 /* vs-3050 is gone, no need to drop the path */
2238 retval
= journal_begin(&th
, inode
->i_sb
, jbegin_count
);
2241 reiserfs_update_inode_transaction(inode
);
2243 if (fs_changed(fs_gen
, inode
->i_sb
)
2244 && item_moved(&tmp_ih
, &path
)) {
2245 reiserfs_restore_prepared_buffer(inode
->i_sb
,
2251 reiserfs_prepare_for_journal(inode
->i_sb
, bh
, 1);
2253 if (fs_changed(fs_gen
, inode
->i_sb
)
2254 && item_moved(&tmp_ih
, &path
)) {
2255 reiserfs_restore_prepared_buffer(inode
->i_sb
, bh
);
2259 memcpy(B_I_PITEM(bh
, ih
) + pos_in_item
, p
+ bytes_copied
,
2262 journal_mark_dirty(&th
, inode
->i_sb
, bh
);
2263 bytes_copied
+= copy_size
;
2264 set_block_dev_mapped(bh_result
, 0, inode
);
2266 /* are there still bytes left? */
2267 if (bytes_copied
< bh_result
->b_size
&&
2268 (byte_offset
+ bytes_copied
) < inode
->i_size
) {
2269 set_cpu_key_k_offset(&key
,
2270 cpu_key_k_offset(&key
) +
2275 reiserfs_warning(inode
->i_sb
, "clm-6003",
2276 "bad item inode %lu", inode
->i_ino
);
2284 if (trans_running
) {
2285 int err
= journal_end(&th
, inode
->i_sb
, jbegin_count
);
2290 reiserfs_write_unlock(inode
->i_sb
);
2292 /* this is where we fill in holes in the file. */
2293 if (use_get_block
) {
2294 retval
= reiserfs_get_block(inode
, block
, bh_result
,
2295 GET_BLOCK_CREATE
| GET_BLOCK_NO_IMUX
2296 | GET_BLOCK_NO_DANGLE
);
2298 if (!buffer_mapped(bh_result
)
2299 || bh_result
->b_blocknr
== 0) {
2300 /* get_block failed to find a mapped unformatted node. */
2306 kunmap(bh_result
->b_page
);
2308 if (!retval
&& buffer_mapped(bh_result
) && bh_result
->b_blocknr
== 0) {
2309 /* we've copied data from the page into the direct item, so the
2310 * buffer in the page is now clean, mark it to reflect that.
2312 lock_buffer(bh_result
);
2313 clear_buffer_dirty(bh_result
);
2314 unlock_buffer(bh_result
);
2320 * mason@suse.com: updated in 2.5.54 to follow the same general io
2321 * start/recovery path as __block_write_full_page, along with special
2322 * code to handle reiserfs tails.
2324 static int reiserfs_write_full_page(struct page
*page
,
2325 struct writeback_control
*wbc
)
2327 struct inode
*inode
= page
->mapping
->host
;
2328 unsigned long end_index
= inode
->i_size
>> PAGE_CACHE_SHIFT
;
2330 unsigned long block
;
2331 sector_t last_block
;
2332 struct buffer_head
*head
, *bh
;
2335 int checked
= PageChecked(page
);
2336 struct reiserfs_transaction_handle th
;
2337 struct super_block
*s
= inode
->i_sb
;
2338 int bh_per_page
= PAGE_CACHE_SIZE
/ s
->s_blocksize
;
2341 /* no logging allowed when nonblocking or from PF_MEMALLOC */
2342 if (checked
&& (current
->flags
& PF_MEMALLOC
)) {
2343 redirty_page_for_writepage(wbc
, page
);
2348 /* The page dirty bit is cleared before writepage is called, which
2349 * means we have to tell create_empty_buffers to make dirty buffers
2350 * The page really should be up to date at this point, so tossing
2351 * in the BH_Uptodate is just a sanity check.
2353 if (!page_has_buffers(page
)) {
2354 create_empty_buffers(page
, s
->s_blocksize
,
2355 (1 << BH_Dirty
) | (1 << BH_Uptodate
));
2357 head
= page_buffers(page
);
2359 /* last page in the file, zero out any contents past the
2360 ** last byte in the file
2362 if (page
->index
>= end_index
) {
2363 unsigned last_offset
;
2365 last_offset
= inode
->i_size
& (PAGE_CACHE_SIZE
- 1);
2366 /* no file contents in this page */
2367 if (page
->index
>= end_index
+ 1 || !last_offset
) {
2371 zero_user_segment(page
, last_offset
, PAGE_CACHE_SIZE
);
2374 block
= page
->index
<< (PAGE_CACHE_SHIFT
- s
->s_blocksize_bits
);
2375 last_block
= (i_size_read(inode
) - 1) >> inode
->i_blkbits
;
2376 /* first map all the buffers, logging any direct items we find */
2378 if (block
> last_block
) {
2380 * This can happen when the block size is less than
2381 * the page size. The corresponding bytes in the page
2382 * were zero filled above
2384 clear_buffer_dirty(bh
);
2385 set_buffer_uptodate(bh
);
2386 } else if ((checked
|| buffer_dirty(bh
)) &&
2387 (!buffer_mapped(bh
) || (buffer_mapped(bh
)
2390 /* not mapped yet, or it points to a direct item, search
2391 * the btree for the mapping info, and log any direct
2394 if ((error
= map_block_for_writepage(inode
, bh
, block
))) {
2398 bh
= bh
->b_this_page
;
2400 } while (bh
!= head
);
2403 * we start the transaction after map_block_for_writepage,
2404 * because it can create holes in the file (an unbounded operation).
2405 * starting it here, we can make a reliable estimate for how many
2406 * blocks we're going to log
2409 ClearPageChecked(page
);
2410 reiserfs_write_lock(s
);
2411 error
= journal_begin(&th
, s
, bh_per_page
+ 1);
2413 reiserfs_write_unlock(s
);
2416 reiserfs_update_inode_transaction(inode
);
2418 /* now go through and lock any dirty buffers on the page */
2421 if (!buffer_mapped(bh
))
2423 if (buffer_mapped(bh
) && bh
->b_blocknr
== 0)
2427 reiserfs_prepare_for_journal(s
, bh
, 1);
2428 journal_mark_dirty(&th
, s
, bh
);
2431 /* from this point on, we know the buffer is mapped to a
2432 * real block and not a direct item
2434 if (wbc
->sync_mode
!= WB_SYNC_NONE
|| !wbc
->nonblocking
) {
2437 if (!trylock_buffer(bh
)) {
2438 redirty_page_for_writepage(wbc
, page
);
2442 if (test_clear_buffer_dirty(bh
)) {
2443 mark_buffer_async_write(bh
);
2447 } while ((bh
= bh
->b_this_page
) != head
);
2450 error
= journal_end(&th
, s
, bh_per_page
+ 1);
2451 reiserfs_write_unlock(s
);
2455 BUG_ON(PageWriteback(page
));
2456 set_page_writeback(page
);
2460 * since any buffer might be the only dirty buffer on the page,
2461 * the first submit_bh can bring the page out of writeback.
2462 * be careful with the buffers.
2465 struct buffer_head
*next
= bh
->b_this_page
;
2466 if (buffer_async_write(bh
)) {
2467 submit_bh(WRITE
, bh
);
2472 } while (bh
!= head
);
2478 * if this page only had a direct item, it is very possible for
2479 * no io to be required without there being an error. Or,
2480 * someone else could have locked them and sent them down the
2481 * pipe without locking the page
2485 if (!buffer_uptodate(bh
)) {
2489 bh
= bh
->b_this_page
;
2490 } while (bh
!= head
);
2492 SetPageUptodate(page
);
2493 end_page_writeback(page
);
2498 /* catches various errors, we need to make sure any valid dirty blocks
2499 * get to the media. The page is currently locked and not marked for
2502 ClearPageUptodate(page
);
2506 if (buffer_mapped(bh
) && buffer_dirty(bh
) && bh
->b_blocknr
) {
2508 mark_buffer_async_write(bh
);
2511 * clear any dirty bits that might have come from getting
2512 * attached to a dirty page
2514 clear_buffer_dirty(bh
);
2516 bh
= bh
->b_this_page
;
2517 } while (bh
!= head
);
2519 BUG_ON(PageWriteback(page
));
2520 set_page_writeback(page
);
2523 struct buffer_head
*next
= bh
->b_this_page
;
2524 if (buffer_async_write(bh
)) {
2525 clear_buffer_dirty(bh
);
2526 submit_bh(WRITE
, bh
);
2531 } while (bh
!= head
);
2535 static int reiserfs_readpage(struct file
*f
, struct page
*page
)
2537 return block_read_full_page(page
, reiserfs_get_block
);
2540 static int reiserfs_writepage(struct page
*page
, struct writeback_control
*wbc
)
2542 struct inode
*inode
= page
->mapping
->host
;
2543 reiserfs_wait_on_write_block(inode
->i_sb
);
2544 return reiserfs_write_full_page(page
, wbc
);
2547 static void reiserfs_truncate_failed_write(struct inode
*inode
)
2549 truncate_inode_pages(inode
->i_mapping
, inode
->i_size
);
2550 reiserfs_truncate_file(inode
, 0);
2553 static int reiserfs_write_begin(struct file
*file
,
2554 struct address_space
*mapping
,
2555 loff_t pos
, unsigned len
, unsigned flags
,
2556 struct page
**pagep
, void **fsdata
)
2558 struct inode
*inode
;
2564 inode
= mapping
->host
;
2566 if (flags
& AOP_FLAG_CONT_EXPAND
&&
2567 (pos
& (inode
->i_sb
->s_blocksize
- 1)) == 0) {
2569 *fsdata
= (void *)(unsigned long)flags
;
2572 index
= pos
>> PAGE_CACHE_SHIFT
;
2573 page
= grab_cache_page_write_begin(mapping
, index
, flags
);
2578 reiserfs_wait_on_write_block(inode
->i_sb
);
2579 fix_tail_page_for_writing(page
);
2580 if (reiserfs_transaction_running(inode
->i_sb
)) {
2581 struct reiserfs_transaction_handle
*th
;
2582 th
= (struct reiserfs_transaction_handle
*)current
->
2584 BUG_ON(!th
->t_refcount
);
2585 BUG_ON(!th
->t_trans_id
);
2586 old_ref
= th
->t_refcount
;
2589 ret
= block_write_begin(file
, mapping
, pos
, len
, flags
, pagep
, fsdata
,
2590 reiserfs_get_block
);
2591 if (ret
&& reiserfs_transaction_running(inode
->i_sb
)) {
2592 struct reiserfs_transaction_handle
*th
= current
->journal_info
;
2593 /* this gets a little ugly. If reiserfs_get_block returned an
2594 * error and left a transacstion running, we've got to close it,
2595 * and we've got to free handle if it was a persistent transaction.
2597 * But, if we had nested into an existing transaction, we need
2598 * to just drop the ref count on the handle.
2600 * If old_ref == 0, the transaction is from reiserfs_get_block,
2601 * and it was a persistent trans. Otherwise, it was nested above.
2603 if (th
->t_refcount
> old_ref
) {
2608 reiserfs_write_lock(inode
->i_sb
);
2609 err
= reiserfs_end_persistent_transaction(th
);
2610 reiserfs_write_unlock(inode
->i_sb
);
2618 page_cache_release(page
);
2619 /* Truncate allocated blocks */
2620 reiserfs_truncate_failed_write(inode
);
2625 int reiserfs_prepare_write(struct file
*f
, struct page
*page
,
2626 unsigned from
, unsigned to
)
2628 struct inode
*inode
= page
->mapping
->host
;
2632 reiserfs_write_unlock(inode
->i_sb
);
2633 reiserfs_wait_on_write_block(inode
->i_sb
);
2634 reiserfs_write_lock(inode
->i_sb
);
2636 fix_tail_page_for_writing(page
);
2637 if (reiserfs_transaction_running(inode
->i_sb
)) {
2638 struct reiserfs_transaction_handle
*th
;
2639 th
= (struct reiserfs_transaction_handle
*)current
->
2641 BUG_ON(!th
->t_refcount
);
2642 BUG_ON(!th
->t_trans_id
);
2643 old_ref
= th
->t_refcount
;
2647 ret
= block_prepare_write(page
, from
, to
, reiserfs_get_block
);
2648 if (ret
&& reiserfs_transaction_running(inode
->i_sb
)) {
2649 struct reiserfs_transaction_handle
*th
= current
->journal_info
;
2650 /* this gets a little ugly. If reiserfs_get_block returned an
2651 * error and left a transacstion running, we've got to close it,
2652 * and we've got to free handle if it was a persistent transaction.
2654 * But, if we had nested into an existing transaction, we need
2655 * to just drop the ref count on the handle.
2657 * If old_ref == 0, the transaction is from reiserfs_get_block,
2658 * and it was a persistent trans. Otherwise, it was nested above.
2660 if (th
->t_refcount
> old_ref
) {
2665 reiserfs_write_lock(inode
->i_sb
);
2666 err
= reiserfs_end_persistent_transaction(th
);
2667 reiserfs_write_unlock(inode
->i_sb
);
2677 static sector_t
reiserfs_aop_bmap(struct address_space
*as
, sector_t block
)
2679 return generic_block_bmap(as
, block
, reiserfs_bmap
);
2682 static int reiserfs_write_end(struct file
*file
, struct address_space
*mapping
,
2683 loff_t pos
, unsigned len
, unsigned copied
,
2684 struct page
*page
, void *fsdata
)
2686 struct inode
*inode
= page
->mapping
->host
;
2689 struct reiserfs_transaction_handle
*th
;
2692 bool locked
= false;
2694 if ((unsigned long)fsdata
& AOP_FLAG_CONT_EXPAND
)
2697 reiserfs_wait_on_write_block(inode
->i_sb
);
2698 if (reiserfs_transaction_running(inode
->i_sb
))
2699 th
= current
->journal_info
;
2703 start
= pos
& (PAGE_CACHE_SIZE
- 1);
2704 if (unlikely(copied
< len
)) {
2705 if (!PageUptodate(page
))
2708 page_zero_new_buffers(page
, start
+ copied
, start
+ len
);
2710 flush_dcache_page(page
);
2712 reiserfs_commit_page(inode
, page
, start
, start
+ copied
);
2714 /* generic_commit_write does this for us, but does not update the
2715 ** transaction tracking stuff when the size changes. So, we have
2716 ** to do the i_size updates here.
2718 if (pos
+ copied
> inode
->i_size
) {
2719 struct reiserfs_transaction_handle myth
;
2720 lock_depth
= reiserfs_write_lock_once(inode
->i_sb
);
2722 /* If the file have grown beyond the border where it
2723 can have a tail, unmark it as needing a tail
2725 if ((have_large_tails(inode
->i_sb
)
2726 && inode
->i_size
> i_block_size(inode
) * 4)
2727 || (have_small_tails(inode
->i_sb
)
2728 && inode
->i_size
> i_block_size(inode
)))
2729 REISERFS_I(inode
)->i_flags
&= ~i_pack_on_close_mask
;
2731 ret
= journal_begin(&myth
, inode
->i_sb
, 1);
2735 reiserfs_update_inode_transaction(inode
);
2736 inode
->i_size
= pos
+ copied
;
2738 * this will just nest into our transaction. It's important
2739 * to use mark_inode_dirty so the inode gets pushed around on the
2740 * dirty lists, and so that O_SYNC works as expected
2742 mark_inode_dirty(inode
);
2743 reiserfs_update_sd(&myth
, inode
);
2745 ret
= journal_end(&myth
, inode
->i_sb
, 1);
2751 lock_depth
= reiserfs_write_lock_once(inode
->i_sb
);
2755 mark_inode_dirty(inode
);
2756 ret
= reiserfs_end_persistent_transaction(th
);
2763 reiserfs_write_unlock_once(inode
->i_sb
, lock_depth
);
2765 page_cache_release(page
);
2767 if (pos
+ len
> inode
->i_size
)
2768 reiserfs_truncate_failed_write(inode
);
2770 return ret
== 0 ? copied
: ret
;
2773 reiserfs_write_unlock_once(inode
->i_sb
, lock_depth
);
2777 reiserfs_update_sd(th
, inode
);
2778 ret
= reiserfs_end_persistent_transaction(th
);
2783 int reiserfs_commit_write(struct file
*f
, struct page
*page
,
2784 unsigned from
, unsigned to
)
2786 struct inode
*inode
= page
->mapping
->host
;
2787 loff_t pos
= ((loff_t
) page
->index
<< PAGE_CACHE_SHIFT
) + to
;
2790 struct reiserfs_transaction_handle
*th
= NULL
;
2792 reiserfs_write_unlock(inode
->i_sb
);
2793 reiserfs_wait_on_write_block(inode
->i_sb
);
2794 reiserfs_write_lock(inode
->i_sb
);
2796 if (reiserfs_transaction_running(inode
->i_sb
)) {
2797 th
= current
->journal_info
;
2799 reiserfs_commit_page(inode
, page
, from
, to
);
2801 /* generic_commit_write does this for us, but does not update the
2802 ** transaction tracking stuff when the size changes. So, we have
2803 ** to do the i_size updates here.
2805 if (pos
> inode
->i_size
) {
2806 struct reiserfs_transaction_handle myth
;
2807 /* If the file have grown beyond the border where it
2808 can have a tail, unmark it as needing a tail
2810 if ((have_large_tails(inode
->i_sb
)
2811 && inode
->i_size
> i_block_size(inode
) * 4)
2812 || (have_small_tails(inode
->i_sb
)
2813 && inode
->i_size
> i_block_size(inode
)))
2814 REISERFS_I(inode
)->i_flags
&= ~i_pack_on_close_mask
;
2816 ret
= journal_begin(&myth
, inode
->i_sb
, 1);
2820 reiserfs_update_inode_transaction(inode
);
2821 inode
->i_size
= pos
;
2823 * this will just nest into our transaction. It's important
2824 * to use mark_inode_dirty so the inode gets pushed around on the
2825 * dirty lists, and so that O_SYNC works as expected
2827 mark_inode_dirty(inode
);
2828 reiserfs_update_sd(&myth
, inode
);
2830 ret
= journal_end(&myth
, inode
->i_sb
, 1);
2836 mark_inode_dirty(inode
);
2837 ret
= reiserfs_end_persistent_transaction(th
);
2848 reiserfs_update_sd(th
, inode
);
2849 ret
= reiserfs_end_persistent_transaction(th
);
2855 void sd_attrs_to_i_attrs(__u16 sd_attrs
, struct inode
*inode
)
2857 if (reiserfs_attrs(inode
->i_sb
)) {
2858 if (sd_attrs
& REISERFS_SYNC_FL
)
2859 inode
->i_flags
|= S_SYNC
;
2861 inode
->i_flags
&= ~S_SYNC
;
2862 if (sd_attrs
& REISERFS_IMMUTABLE_FL
)
2863 inode
->i_flags
|= S_IMMUTABLE
;
2865 inode
->i_flags
&= ~S_IMMUTABLE
;
2866 if (sd_attrs
& REISERFS_APPEND_FL
)
2867 inode
->i_flags
|= S_APPEND
;
2869 inode
->i_flags
&= ~S_APPEND
;
2870 if (sd_attrs
& REISERFS_NOATIME_FL
)
2871 inode
->i_flags
|= S_NOATIME
;
2873 inode
->i_flags
&= ~S_NOATIME
;
2874 if (sd_attrs
& REISERFS_NOTAIL_FL
)
2875 REISERFS_I(inode
)->i_flags
|= i_nopack_mask
;
2877 REISERFS_I(inode
)->i_flags
&= ~i_nopack_mask
;
2881 void i_attrs_to_sd_attrs(struct inode
*inode
, __u16
* sd_attrs
)
2883 if (reiserfs_attrs(inode
->i_sb
)) {
2884 if (inode
->i_flags
& S_IMMUTABLE
)
2885 *sd_attrs
|= REISERFS_IMMUTABLE_FL
;
2887 *sd_attrs
&= ~REISERFS_IMMUTABLE_FL
;
2888 if (inode
->i_flags
& S_SYNC
)
2889 *sd_attrs
|= REISERFS_SYNC_FL
;
2891 *sd_attrs
&= ~REISERFS_SYNC_FL
;
2892 if (inode
->i_flags
& S_NOATIME
)
2893 *sd_attrs
|= REISERFS_NOATIME_FL
;
2895 *sd_attrs
&= ~REISERFS_NOATIME_FL
;
2896 if (REISERFS_I(inode
)->i_flags
& i_nopack_mask
)
2897 *sd_attrs
|= REISERFS_NOTAIL_FL
;
2899 *sd_attrs
&= ~REISERFS_NOTAIL_FL
;
2903 /* decide if this buffer needs to stay around for data logging or ordered
2906 static int invalidatepage_can_drop(struct inode
*inode
, struct buffer_head
*bh
)
2909 struct reiserfs_journal
*j
= SB_JOURNAL(inode
->i_sb
);
2912 spin_lock(&j
->j_dirty_buffers_lock
);
2913 if (!buffer_mapped(bh
)) {
2916 /* the page is locked, and the only places that log a data buffer
2917 * also lock the page.
2919 if (reiserfs_file_data_log(inode
)) {
2921 * very conservative, leave the buffer pinned if
2922 * anyone might need it.
2924 if (buffer_journaled(bh
) || buffer_journal_dirty(bh
)) {
2927 } else if (buffer_dirty(bh
)) {
2928 struct reiserfs_journal_list
*jl
;
2929 struct reiserfs_jh
*jh
= bh
->b_private
;
2931 /* why is this safe?
2932 * reiserfs_setattr updates i_size in the on disk
2933 * stat data before allowing vmtruncate to be called.
2935 * If buffer was put onto the ordered list for this
2936 * transaction, we know for sure either this transaction
2937 * or an older one already has updated i_size on disk,
2938 * and this ordered data won't be referenced in the file
2941 * if the buffer was put onto the ordered list for an older
2942 * transaction, we need to leave it around
2944 if (jh
&& (jl
= jh
->jl
)
2945 && jl
!= SB_JOURNAL(inode
->i_sb
)->j_current_jl
)
2949 if (ret
&& bh
->b_private
) {
2950 reiserfs_free_jh(bh
);
2952 spin_unlock(&j
->j_dirty_buffers_lock
);
2957 /* clm -- taken from fs/buffer.c:block_invalidate_page */
2958 static void reiserfs_invalidatepage(struct page
*page
, unsigned long offset
)
2960 struct buffer_head
*head
, *bh
, *next
;
2961 struct inode
*inode
= page
->mapping
->host
;
2962 unsigned int curr_off
= 0;
2965 BUG_ON(!PageLocked(page
));
2968 ClearPageChecked(page
);
2970 if (!page_has_buffers(page
))
2973 head
= page_buffers(page
);
2976 unsigned int next_off
= curr_off
+ bh
->b_size
;
2977 next
= bh
->b_this_page
;
2980 * is this block fully invalidated?
2982 if (offset
<= curr_off
) {
2983 if (invalidatepage_can_drop(inode
, bh
))
2984 reiserfs_unmap_buffer(bh
);
2988 curr_off
= next_off
;
2990 } while (bh
!= head
);
2993 * We release buffers only if the entire page is being invalidated.
2994 * The get_block cached value has been unconditionally invalidated,
2995 * so real IO is not possible anymore.
2997 if (!offset
&& ret
) {
2998 ret
= try_to_release_page(page
, 0);
2999 /* maybe should BUG_ON(!ret); - neilb */
3005 static int reiserfs_set_page_dirty(struct page
*page
)
3007 struct inode
*inode
= page
->mapping
->host
;
3008 if (reiserfs_file_data_log(inode
)) {
3009 SetPageChecked(page
);
3010 return __set_page_dirty_nobuffers(page
);
3012 return __set_page_dirty_buffers(page
);
3016 * Returns 1 if the page's buffers were dropped. The page is locked.
3018 * Takes j_dirty_buffers_lock to protect the b_assoc_buffers list_heads
3019 * in the buffers at page_buffers(page).
3021 * even in -o notail mode, we can't be sure an old mount without -o notail
3022 * didn't create files with tails.
3024 static int reiserfs_releasepage(struct page
*page
, gfp_t unused_gfp_flags
)
3026 struct inode
*inode
= page
->mapping
->host
;
3027 struct reiserfs_journal
*j
= SB_JOURNAL(inode
->i_sb
);
3028 struct buffer_head
*head
;
3029 struct buffer_head
*bh
;
3032 WARN_ON(PageChecked(page
));
3033 spin_lock(&j
->j_dirty_buffers_lock
);
3034 head
= page_buffers(page
);
3037 if (bh
->b_private
) {
3038 if (!buffer_dirty(bh
) && !buffer_locked(bh
)) {
3039 reiserfs_free_jh(bh
);
3045 bh
= bh
->b_this_page
;
3046 } while (bh
!= head
);
3048 ret
= try_to_free_buffers(page
);
3049 spin_unlock(&j
->j_dirty_buffers_lock
);
3053 /* We thank Mingming Cao for helping us understand in great detail what
3054 to do in this section of the code. */
3055 static ssize_t
reiserfs_direct_IO(int rw
, struct kiocb
*iocb
,
3056 const struct iovec
*iov
, loff_t offset
,
3057 unsigned long nr_segs
)
3059 struct file
*file
= iocb
->ki_filp
;
3060 struct inode
*inode
= file
->f_mapping
->host
;
3062 return blockdev_direct_IO(rw
, iocb
, inode
, inode
->i_sb
->s_bdev
, iov
,
3064 reiserfs_get_blocks_direct_io
, NULL
);
3067 int reiserfs_setattr(struct dentry
*dentry
, struct iattr
*attr
)
3069 struct inode
*inode
= dentry
->d_inode
;
3070 unsigned int ia_valid
;
3074 /* must be turned off for recursive notify_change calls */
3075 ia_valid
= attr
->ia_valid
&= ~(ATTR_KILL_SUID
|ATTR_KILL_SGID
);
3077 depth
= reiserfs_write_lock_once(inode
->i_sb
);
3078 if (attr
->ia_valid
& ATTR_SIZE
) {
3079 dquot_initialize(inode
);
3081 /* version 2 items will be caught by the s_maxbytes check
3082 ** done for us in vmtruncate
3084 if (get_inode_item_key_version(inode
) == KEY_FORMAT_3_5
&&
3085 attr
->ia_size
> MAX_NON_LFS
) {
3089 /* fill in hole pointers in the expanding truncate case. */
3090 if (attr
->ia_size
> inode
->i_size
) {
3091 error
= generic_cont_expand_simple(inode
, attr
->ia_size
);
3092 if (REISERFS_I(inode
)->i_prealloc_count
> 0) {
3094 struct reiserfs_transaction_handle th
;
3095 /* we're changing at most 2 bitmaps, inode + super */
3096 err
= journal_begin(&th
, inode
->i_sb
, 4);
3098 reiserfs_discard_prealloc(&th
, inode
);
3099 err
= journal_end(&th
, inode
->i_sb
, 4);
3107 * file size is changed, ctime and mtime are
3110 attr
->ia_valid
|= (ATTR_MTIME
| ATTR_CTIME
);
3114 if ((((attr
->ia_valid
& ATTR_UID
) && (attr
->ia_uid
& ~0xffff)) ||
3115 ((attr
->ia_valid
& ATTR_GID
) && (attr
->ia_gid
& ~0xffff))) &&
3116 (get_inode_sd_version(inode
) == STAT_DATA_V1
)) {
3117 /* stat data of format v3.5 has 16 bit uid and gid */
3122 error
= inode_change_ok(inode
, attr
);
3124 if ((ia_valid
& ATTR_UID
&& attr
->ia_uid
!= inode
->i_uid
) ||
3125 (ia_valid
& ATTR_GID
&& attr
->ia_gid
!= inode
->i_gid
)) {
3126 error
= reiserfs_chown_xattrs(inode
, attr
);
3129 struct reiserfs_transaction_handle th
;
3132 (REISERFS_QUOTA_INIT_BLOCKS(inode
->i_sb
) +
3133 REISERFS_QUOTA_DEL_BLOCKS(inode
->i_sb
)) +
3136 /* (user+group)*(old+new) structure - we count quota info and , inode write (sb, inode) */
3138 journal_begin(&th
, inode
->i_sb
,
3142 error
= dquot_transfer(inode
, attr
);
3144 journal_end(&th
, inode
->i_sb
,
3148 /* Update corresponding info in inode so that everything is in
3149 * one transaction */
3150 if (attr
->ia_valid
& ATTR_UID
)
3151 inode
->i_uid
= attr
->ia_uid
;
3152 if (attr
->ia_valid
& ATTR_GID
)
3153 inode
->i_gid
= attr
->ia_gid
;
3154 mark_inode_dirty(inode
);
3156 journal_end(&th
, inode
->i_sb
, jbegin_count
);
3161 * Relax the lock here, as it might truncate the
3162 * inode pages and wait for inode pages locks.
3163 * To release such page lock, the owner needs the
3166 reiserfs_write_unlock_once(inode
->i_sb
, depth
);
3167 error
= inode_setattr(inode
, attr
);
3168 depth
= reiserfs_write_lock_once(inode
->i_sb
);
3172 if (!error
&& reiserfs_posixacl(inode
->i_sb
)) {
3173 if (attr
->ia_valid
& ATTR_MODE
)
3174 error
= reiserfs_acl_chmod(inode
);
3178 reiserfs_write_unlock_once(inode
->i_sb
, depth
);
3183 const struct address_space_operations reiserfs_address_space_operations
= {
3184 .writepage
= reiserfs_writepage
,
3185 .readpage
= reiserfs_readpage
,
3186 .readpages
= reiserfs_readpages
,
3187 .releasepage
= reiserfs_releasepage
,
3188 .invalidatepage
= reiserfs_invalidatepage
,
3189 .sync_page
= block_sync_page
,
3190 .write_begin
= reiserfs_write_begin
,
3191 .write_end
= reiserfs_write_end
,
3192 .bmap
= reiserfs_aop_bmap
,
3193 .direct_IO
= reiserfs_direct_IO
,
3194 .set_page_dirty
= reiserfs_set_page_dirty
,