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Btrfs: Use correct values when updating inode i_size on fallocate

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commit f2bc9dd07e3424c4ec5f3949961fe053d47bc825
Author: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Date:   Wed Jan 20 12:57:53 2010 +0530

    Btrfs: Use correct values when updating inode i_size on fallocate

    Even though we allocate more, we should be updating inode i_size
    as per the arguments passed

    Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Aneesh Kumar K.V 2010-01-20 07:28:54 +00:00 committed by Chris Mason
parent b8d9bfeb18
commit d1ea6a6145
1 changed files with 9 additions and 4 deletions
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13
fs/btrfs/inode.c
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@ -5800,7 +5800,7 @@ static int btrfs_symlink(struct inode *dir, struct dentry *dentry,
}
static int prealloc_file_range(struct inode *inode, u64 start, u64 end,
u64 alloc_hint, int mode)
u64 alloc_hint, int mode, loff_t actual_len)
{
struct btrfs_trans_handle *trans;
struct btrfs_root *root = BTRFS_I(inode)->root;
@ -5809,6 +5809,7 @@ static int prealloc_file_range(struct inode *inode, u64 start, u64 end,
u64 cur_offset = start;
u64 num_bytes = end - start;
int ret = 0;
u64 i_size;
while (num_bytes > 0) {
alloc_size = min(num_bytes, root->fs_info->max_extent);
@ -5847,8 +5848,12 @@ static int prealloc_file_range(struct inode *inode, u64 start, u64 end,
BTRFS_I(inode)->flags |= BTRFS_INODE_PREALLOC;
if (!(mode & FALLOC_FL_KEEP_SIZE) &&
cur_offset > inode->i_size) {
i_size_write(inode, cur_offset);
btrfs_ordered_update_i_size(inode, cur_offset, NULL);
if (cur_offset > actual_len)
i_size = actual_len;
else
i_size = cur_offset;
i_size_write(inode, i_size);
btrfs_ordered_update_i_size(inode, i_size, NULL);
}
ret = btrfs_update_inode(trans, root, inode);
@ -5941,7 +5946,7 @@ static long btrfs_fallocate(struct inode *inode, int mode,
!test_bit(EXTENT_FLAG_PREALLOC, &em->flags))) {
ret = prealloc_file_range(inode,
cur_offset, last_byte,
alloc_hint, mode);
alloc_hint, mode, offset+len);
if (ret < 0) {
free_extent_map(em);
break;