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f2fs: simplify __allocate_data_blocks 

This patch uses existing function f2fs_map_block to simplify implementation
of __allocate_data_blocks.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu 2016-01-26 15:38:29 +08:00 committed by Jaegeuk Kim
parent 4fe71e88bf
commit 5b8db7fada
1 changed files with 4 additions and 56 deletions
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60
fs/f2fs/data.c
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@ -536,64 +536,12 @@ alloc:
static int __allocate_data_blocks(struct inode *inode, loff_t offset,
size_t count)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
struct dnode_of_data dn;
u64 start = F2FS_BYTES_TO_BLK(offset);
u64 len = F2FS_BYTES_TO_BLK(count);
bool allocated = false;
u64 end_offset;
int err = 0;
struct f2fs_map_blocks map;
while (len) {
f2fs_lock_op(sbi);
map.m_lblk = F2FS_BYTES_TO_BLK(offset);
map.m_len = F2FS_BYTES_TO_BLK(count);
/* When reading holes, we need its node page */
set_new_dnode(&dn, inode, NULL, NULL, 0);
err = get_dnode_of_data(&dn, start, ALLOC_NODE);
if (err)
goto out;
allocated = false;
end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode));
while (dn.ofs_in_node < end_offset && len) {
block_t blkaddr;
if (unlikely(f2fs_cp_error(sbi))) {
err = -EIO;
goto sync_out;
}
blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node);
if (blkaddr == NULL_ADDR || blkaddr == NEW_ADDR) {
err = __allocate_data_block(&dn);
if (err)
goto sync_out;
allocated = true;
}
len--;
start++;
dn.ofs_in_node++;
}
if (allocated)
sync_inode_page(&dn);
f2fs_put_dnode(&dn);
f2fs_unlock_op(sbi);
f2fs_balance_fs(sbi, allocated);
}
return err;
sync_out:
if (allocated)
sync_inode_page(&dn);
f2fs_put_dnode(&dn);
out:
f2fs_unlock_op(sbi);
f2fs_balance_fs(sbi, allocated);
return err;
return f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_DIO);
}
/*