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ext4: Fix estimate of # of blocks needed to write indirect-mapped files

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commit d330a5befb upstream (as of v2.6.34-rc3)

http://bugzilla.kernel.org/show_bug.cgi?id=15420

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Jan Kara 2010-05-30 22:49:38 -04:00 committed by Greg Kroah-Hartman
parent 77795ad590
commit 112ba39e2f
1 changed files with 2 additions and 2 deletions
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4
fs/ext4/inode.c
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@ -1060,7 +1060,7 @@ static int ext4_indirect_calc_metadata_amount(struct inode *inode,
sector_t lblock)
{
struct ext4_inode_info *ei = EXT4_I(inode);
int dind_mask = EXT4_ADDR_PER_BLOCK(inode->i_sb) - 1;
sector_t dind_mask = ~((sector_t)EXT4_ADDR_PER_BLOCK(inode->i_sb) - 1);
int blk_bits;
if (lblock < EXT4_NDIR_BLOCKS)
@ -1075,7 +1075,7 @@ static int ext4_indirect_calc_metadata_amount(struct inode *inode,
}
ei->i_da_metadata_calc_last_lblock = lblock & dind_mask;
ei->i_da_metadata_calc_len = 1;
blk_bits = roundup_pow_of_two(lblock + 1);
blk_bits = order_base_2(lblock);
return (blk_bits / EXT4_ADDR_PER_BLOCK_BITS(inode->i_sb)) + 1;
}