2009-03-30 22:02:44 +04:00
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/*
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2005-04-17 02:20:36 +04:00
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* Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
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*/
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2005-07-13 07:21:28 +04:00
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2009-03-30 22:02:44 +04:00
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/*
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2005-04-17 02:20:36 +04:00
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* Written by Alexander Zarochentcev.
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*
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* The kernel part of the (on-line) reiserfs resizer.
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*/
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/vmalloc.h>
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#include <linux/string.h>
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#include <linux/errno.h>
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2012-03-17 09:16:43 +04:00
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#include "reiserfs.h"
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2005-04-17 02:20:36 +04:00
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#include <linux/buffer_head.h>
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2005-07-13 07:21:28 +04:00
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int reiserfs_resize(struct super_block *s, unsigned long block_count_new)
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2005-04-17 02:20:36 +04:00
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{
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2005-07-13 07:21:28 +04:00
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int err = 0;
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struct reiserfs_super_block *sb;
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struct reiserfs_bitmap_info *bitmap;
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2006-10-01 10:28:42 +04:00
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struct reiserfs_bitmap_info *info;
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2005-04-17 02:20:36 +04:00
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struct reiserfs_bitmap_info *old_bitmap = SB_AP_BITMAP(s);
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2005-07-13 07:21:28 +04:00
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struct buffer_head *bh;
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2005-04-17 02:20:36 +04:00
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struct reiserfs_transaction_handle th;
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unsigned int bmap_nr_new, bmap_nr;
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unsigned int block_r_new, block_r;
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2005-07-13 07:21:28 +04:00
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struct reiserfs_list_bitmap *jb;
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2005-04-17 02:20:36 +04:00
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struct reiserfs_list_bitmap jbitmap[JOURNAL_NUM_BITMAPS];
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2005-07-13 07:21:28 +04:00
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2005-04-17 02:20:36 +04:00
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unsigned long int block_count, free_blocks;
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int i;
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2005-07-13 07:21:28 +04:00
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int copy_size;
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2013-08-09 01:34:46 +04:00
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int depth;
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2005-04-17 02:20:36 +04:00
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sb = SB_DISK_SUPER_BLOCK(s);
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if (SB_BLOCK_COUNT(s) >= block_count_new) {
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printk("can\'t shrink filesystem on-line\n");
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return -EINVAL;
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}
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/* check the device size */
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2013-08-09 01:34:46 +04:00
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depth = reiserfs_write_unlock_nested(s);
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2005-04-17 02:20:36 +04:00
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bh = sb_bread(s, block_count_new - 1);
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2013-08-09 01:34:46 +04:00
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reiserfs_write_lock_nested(s, depth);
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2005-04-17 02:20:36 +04:00
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if (!bh) {
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printk("reiserfs_resize: can\'t read last block\n");
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return -EINVAL;
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2005-07-13 07:21:28 +04:00
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}
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2005-04-17 02:20:36 +04:00
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bforget(bh);
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2014-04-23 18:00:36 +04:00
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/*
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* old disk layout detection; those partitions can be mounted, but
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* cannot be resized
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*/
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2005-07-13 07:21:28 +04:00
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if (SB_BUFFER_WITH_SB(s)->b_blocknr * SB_BUFFER_WITH_SB(s)->b_size
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!= REISERFS_DISK_OFFSET_IN_BYTES) {
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printk
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("reiserfs_resize: unable to resize a reiserfs without distributed bitmap (fs version < 3.5.12)\n");
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2005-04-17 02:20:36 +04:00
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return -ENOTSUPP;
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}
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2005-07-13 07:21:28 +04:00
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2005-04-17 02:20:36 +04:00
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/* count used bits in last bitmap block */
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2007-10-19 10:39:27 +04:00
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block_r = SB_BLOCK_COUNT(s) -
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(reiserfs_bmap_count(s) - 1) * s->s_blocksize * 8;
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2005-07-13 07:21:28 +04:00
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2005-04-17 02:20:36 +04:00
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/* count bitmap blocks in new fs */
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2005-07-13 07:21:28 +04:00
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bmap_nr_new = block_count_new / (s->s_blocksize * 8);
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2005-04-17 02:20:36 +04:00
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block_r_new = block_count_new - bmap_nr_new * s->s_blocksize * 8;
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2005-07-13 07:21:28 +04:00
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if (block_r_new)
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2005-04-17 02:20:36 +04:00
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bmap_nr_new++;
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else
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block_r_new = s->s_blocksize * 8;
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/* save old values */
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block_count = SB_BLOCK_COUNT(s);
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2007-10-19 10:39:27 +04:00
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bmap_nr = reiserfs_bmap_count(s);
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2005-04-17 02:20:36 +04:00
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/* resizing of reiserfs bitmaps (journal and real), if needed */
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2005-07-13 07:21:28 +04:00
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if (bmap_nr_new > bmap_nr) {
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/* reallocate journal bitmaps */
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if (reiserfs_allocate_list_bitmaps(s, jbitmap, bmap_nr_new) < 0) {
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printk
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("reiserfs_resize: unable to allocate memory for journal bitmaps\n");
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return -ENOMEM;
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}
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2014-04-23 18:00:36 +04:00
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/*
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* the new journal bitmaps are zero filled, now we copy i
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* the bitmap node pointers from the old journal bitmap
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* structs, and then transfer the new data structures
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* into the journal struct.
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*
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* using the copy_size var below allows this code to work for
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* both shrinking and expanding the FS.
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2005-07-13 07:21:28 +04:00
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*/
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2022-08-19 10:52:40 +03:00
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copy_size = min(bmap_nr_new, bmap_nr);
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2005-07-13 07:21:28 +04:00
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copy_size =
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copy_size * sizeof(struct reiserfs_list_bitmap_node *);
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for (i = 0; i < JOURNAL_NUM_BITMAPS; i++) {
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struct reiserfs_bitmap_node **node_tmp;
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jb = SB_JOURNAL(s)->j_list_bitmap + i;
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memcpy(jbitmap[i].bitmaps, jb->bitmaps, copy_size);
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2014-04-23 18:00:36 +04:00
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/*
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* just in case vfree schedules on us, copy the new
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* pointer into the journal struct before freeing the
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* old one
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2005-07-13 07:21:28 +04:00
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*/
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node_tmp = jb->bitmaps;
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jb->bitmaps = jbitmap[i].bitmaps;
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vfree(node_tmp);
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}
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2014-04-23 18:00:36 +04:00
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/*
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* allocate additional bitmap blocks, reallocate
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* array of bitmap block pointers
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*/
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2005-07-13 07:21:28 +04:00
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bitmap =
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treewide: Use array_size() in vzalloc()
The vzalloc() function has no 2-factor argument form, so multiplication
factors need to be wrapped in array_size(). This patch replaces cases of:
vzalloc(a * b)
with:
vzalloc(array_size(a, b))
as well as handling cases of:
vzalloc(a * b * c)
with:
vzalloc(array3_size(a, b, c))
This does, however, attempt to ignore constant size factors like:
vzalloc(4 * 1024)
though any constants defined via macros get caught up in the conversion.
Any factors with a sizeof() of "unsigned char", "char", and "u8" were
dropped, since they're redundant.
The Coccinelle script used for this was:
// Fix redundant parens around sizeof().
@@
type TYPE;
expression THING, E;
@@
(
vzalloc(
- (sizeof(TYPE)) * E
+ sizeof(TYPE) * E
, ...)
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vzalloc(
- (sizeof(THING)) * E
+ sizeof(THING) * E
, ...)
)
// Drop single-byte sizes and redundant parens.
@@
expression COUNT;
typedef u8;
typedef __u8;
@@
(
vzalloc(
- sizeof(u8) * (COUNT)
+ COUNT
, ...)
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vzalloc(
- sizeof(__u8) * (COUNT)
+ COUNT
, ...)
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vzalloc(
- sizeof(char) * (COUNT)
+ COUNT
, ...)
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vzalloc(
- sizeof(unsigned char) * (COUNT)
+ COUNT
, ...)
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vzalloc(
- sizeof(u8) * COUNT
+ COUNT
, ...)
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vzalloc(
- sizeof(__u8) * COUNT
+ COUNT
, ...)
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vzalloc(
- sizeof(char) * COUNT
+ COUNT
, ...)
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vzalloc(
- sizeof(unsigned char) * COUNT
+ COUNT
, ...)
)
// 2-factor product with sizeof(type/expression) and identifier or constant.
@@
type TYPE;
expression THING;
identifier COUNT_ID;
constant COUNT_CONST;
@@
(
vzalloc(
- sizeof(TYPE) * (COUNT_ID)
+ array_size(COUNT_ID, sizeof(TYPE))
, ...)
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vzalloc(
- sizeof(TYPE) * COUNT_ID
+ array_size(COUNT_ID, sizeof(TYPE))
, ...)
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vzalloc(
- sizeof(TYPE) * (COUNT_CONST)
+ array_size(COUNT_CONST, sizeof(TYPE))
, ...)
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vzalloc(
- sizeof(TYPE) * COUNT_CONST
+ array_size(COUNT_CONST, sizeof(TYPE))
, ...)
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vzalloc(
- sizeof(THING) * (COUNT_ID)
+ array_size(COUNT_ID, sizeof(THING))
, ...)
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vzalloc(
- sizeof(THING) * COUNT_ID
+ array_size(COUNT_ID, sizeof(THING))
, ...)
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vzalloc(
- sizeof(THING) * (COUNT_CONST)
+ array_size(COUNT_CONST, sizeof(THING))
, ...)
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vzalloc(
- sizeof(THING) * COUNT_CONST
+ array_size(COUNT_CONST, sizeof(THING))
, ...)
)
// 2-factor product, only identifiers.
@@
identifier SIZE, COUNT;
@@
vzalloc(
- SIZE * COUNT
+ array_size(COUNT, SIZE)
, ...)
// 3-factor product with 1 sizeof(type) or sizeof(expression), with
// redundant parens removed.
@@
expression THING;
identifier STRIDE, COUNT;
type TYPE;
@@
(
vzalloc(
- sizeof(TYPE) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
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vzalloc(
- sizeof(TYPE) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
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vzalloc(
- sizeof(TYPE) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
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vzalloc(
- sizeof(TYPE) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
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vzalloc(
- sizeof(THING) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
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vzalloc(
- sizeof(THING) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
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vzalloc(
- sizeof(THING) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
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vzalloc(
- sizeof(THING) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
)
// 3-factor product with 2 sizeof(variable), with redundant parens removed.
@@
expression THING1, THING2;
identifier COUNT;
type TYPE1, TYPE2;
@@
(
vzalloc(
- sizeof(TYPE1) * sizeof(TYPE2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
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vzalloc(
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
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vzalloc(
- sizeof(THING1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
|
vzalloc(
- sizeof(THING1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
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vzalloc(
- sizeof(TYPE1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
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vzalloc(
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
)
// 3-factor product, only identifiers, with redundant parens removed.
@@
identifier STRIDE, SIZE, COUNT;
@@
(
vzalloc(
- (COUNT) * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
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vzalloc(
- COUNT * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
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vzalloc(
- COUNT * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
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vzalloc(
- (COUNT) * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
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vzalloc(
- COUNT * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
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vzalloc(
- (COUNT) * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
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vzalloc(
- (COUNT) * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
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vzalloc(
- COUNT * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
)
// Any remaining multi-factor products, first at least 3-factor products
// when they're not all constants...
@@
expression E1, E2, E3;
constant C1, C2, C3;
@@
(
vzalloc(C1 * C2 * C3, ...)
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vzalloc(
- E1 * E2 * E3
+ array3_size(E1, E2, E3)
, ...)
)
// And then all remaining 2 factors products when they're not all constants.
@@
expression E1, E2;
constant C1, C2;
@@
(
vzalloc(C1 * C2, ...)
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vzalloc(
- E1 * E2
+ array_size(E1, E2)
, ...)
)
Signed-off-by: Kees Cook <keescook@chromium.org>
2018-06-13 00:27:37 +03:00
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vzalloc(array_size(bmap_nr_new,
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sizeof(struct reiserfs_bitmap_info)));
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2005-07-13 07:21:28 +04:00
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if (!bitmap) {
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2014-04-23 18:00:36 +04:00
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/*
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* Journal bitmaps are still supersized, but the
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* memory isn't leaked, so I guess it's ok
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*/
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2005-07-13 07:21:28 +04:00
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printk("reiserfs_resize: unable to allocate memory.\n");
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return -ENOMEM;
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}
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for (i = 0; i < bmap_nr; i++)
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bitmap[i] = old_bitmap[i];
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2014-04-23 18:00:36 +04:00
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/*
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* This doesn't go through the journal, but it doesn't have to.
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* The changes are still atomic: We're synced up when the
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* journal transaction begins, and the new bitmaps don't
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* matter if the transaction fails.
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*/
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2005-07-13 07:21:28 +04:00
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for (i = bmap_nr; i < bmap_nr_new; i++) {
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2013-08-09 01:34:46 +04:00
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int depth;
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2014-04-23 18:00:36 +04:00
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/*
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* don't use read_bitmap_block since it will cache
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* the uninitialized bitmap
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*/
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2013-08-09 01:34:46 +04:00
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depth = reiserfs_write_unlock_nested(s);
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2006-10-01 10:28:44 +04:00
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bh = sb_bread(s, i * s->s_blocksize * 8);
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2013-08-09 01:34:46 +04:00
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reiserfs_write_lock_nested(s, depth);
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2007-05-08 11:24:37 +04:00
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if (!bh) {
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vfree(bitmap);
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return -EIO;
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}
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2006-10-01 10:28:42 +04:00
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memset(bh->b_data, 0, sb_blocksize(sb));
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2011-07-26 04:13:37 +04:00
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reiserfs_set_le_bit(0, bh->b_data);
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2006-10-01 10:28:43 +04:00
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reiserfs_cache_bitmap_metadata(s, bh, bitmap + i);
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2006-10-01 10:28:42 +04:00
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set_buffer_uptodate(bh);
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mark_buffer_dirty(bh);
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2013-08-09 01:34:46 +04:00
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depth = reiserfs_write_unlock_nested(s);
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2006-10-01 10:28:42 +04:00
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sync_dirty_buffer(bh);
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2013-08-09 01:34:46 +04:00
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reiserfs_write_lock_nested(s, depth);
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2014-04-23 18:00:36 +04:00
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/* update bitmap_info stuff */
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2005-07-13 07:21:28 +04:00
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bitmap[i].free_count = sb_blocksize(sb) * 8 - 1;
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2006-10-01 10:28:42 +04:00
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brelse(bh);
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2005-07-13 07:21:28 +04:00
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}
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/* free old bitmap blocks array */
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SB_AP_BITMAP(s) = bitmap;
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vfree(old_bitmap);
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2005-04-17 02:20:36 +04:00
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}
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2005-07-13 07:21:28 +04:00
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2014-04-23 18:00:36 +04:00
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/*
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* begin transaction, if there was an error, it's fine. Yes, we have
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2005-04-17 02:20:36 +04:00
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* incorrect bitmaps now, but none of it is ever going to touch the
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2014-04-23 18:00:36 +04:00
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* disk anyway.
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*/
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2005-04-17 02:20:36 +04:00
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err = journal_begin(&th, s, 10);
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if (err)
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2005-07-13 07:21:28 +04:00
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return err;
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2005-04-17 02:20:36 +04:00
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2006-10-01 10:28:42 +04:00
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/* Extend old last bitmap block - new blocks have been made available */
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info = SB_AP_BITMAP(s) + bmap_nr - 1;
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2006-10-01 10:28:44 +04:00
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bh = reiserfs_read_bitmap_block(s, bmap_nr - 1);
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if (!bh) {
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2014-04-23 18:00:38 +04:00
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int jerr = journal_end(&th);
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2006-10-01 10:28:44 +04:00
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if (jerr)
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return jerr;
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return -EIO;
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}
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2006-10-01 10:28:42 +04:00
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reiserfs_prepare_for_journal(s, bh, 1);
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2005-04-17 02:20:36 +04:00
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for (i = block_r; i < s->s_blocksize * 8; i++)
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2011-07-26 04:13:37 +04:00
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reiserfs_clear_le_bit(i, bh->b_data);
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2006-10-01 10:28:42 +04:00
|
|
|
info->free_count += s->s_blocksize * 8 - block_r;
|
|
|
|
|
2014-04-23 18:00:39 +04:00
|
|
|
journal_mark_dirty(&th, bh);
|
2006-10-01 10:28:42 +04:00
|
|
|
brelse(bh);
|
2005-04-17 02:20:36 +04:00
|
|
|
|
2006-10-01 10:28:42 +04:00
|
|
|
/* Correct new last bitmap block - It may not be full */
|
|
|
|
info = SB_AP_BITMAP(s) + bmap_nr_new - 1;
|
2006-10-01 10:28:44 +04:00
|
|
|
bh = reiserfs_read_bitmap_block(s, bmap_nr_new - 1);
|
|
|
|
if (!bh) {
|
2014-04-23 18:00:38 +04:00
|
|
|
int jerr = journal_end(&th);
|
2006-10-01 10:28:44 +04:00
|
|
|
if (jerr)
|
|
|
|
return jerr;
|
|
|
|
return -EIO;
|
|
|
|
}
|
2005-04-17 02:20:36 +04:00
|
|
|
|
2006-10-01 10:28:42 +04:00
|
|
|
reiserfs_prepare_for_journal(s, bh, 1);
|
2005-04-17 02:20:36 +04:00
|
|
|
for (i = block_r_new; i < s->s_blocksize * 8; i++)
|
2011-07-26 04:13:37 +04:00
|
|
|
reiserfs_set_le_bit(i, bh->b_data);
|
2014-04-23 18:00:39 +04:00
|
|
|
journal_mark_dirty(&th, bh);
|
2006-10-01 10:28:42 +04:00
|
|
|
brelse(bh);
|
2005-07-13 07:21:28 +04:00
|
|
|
|
2006-10-01 10:28:42 +04:00
|
|
|
info->free_count -= s->s_blocksize * 8 - block_r_new;
|
2005-07-13 07:21:28 +04:00
|
|
|
/* update super */
|
|
|
|
reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
|
2005-04-17 02:20:36 +04:00
|
|
|
free_blocks = SB_FREE_BLOCKS(s);
|
2005-07-13 07:21:28 +04:00
|
|
|
PUT_SB_FREE_BLOCKS(s,
|
|
|
|
free_blocks + (block_count_new - block_count -
|
|
|
|
(bmap_nr_new - bmap_nr)));
|
2005-04-17 02:20:36 +04:00
|
|
|
PUT_SB_BLOCK_COUNT(s, block_count_new);
|
2007-10-19 10:39:27 +04:00
|
|
|
PUT_SB_BMAP_NR(s, bmap_would_wrap(bmap_nr_new) ? : bmap_nr_new);
|
2005-04-17 02:20:36 +04:00
|
|
|
|
2014-04-23 18:00:39 +04:00
|
|
|
journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s));
|
2005-07-13 07:21:28 +04:00
|
|
|
|
2005-04-17 02:20:36 +04:00
|
|
|
SB_JOURNAL(s)->j_must_wait = 1;
|
2014-04-23 18:00:38 +04:00
|
|
|
return journal_end(&th);
|
2005-04-17 02:20:36 +04:00
|
|
|
}
|