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f2fs: move dio preallocation into f2fs_file_write_iter 

This patch moves preallocation code for direct IOs into f2fs_file_write_iter.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim 2016-02-03 13:09:09 -08:00
parent d31c7c3f0b
commit b439b103a6
3 changed files with 39 additions and 23 deletions
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38
fs/f2fs/data.c
View File

@ -564,16 +564,24 @@ alloc:
return 0;
}
static int __allocate_data_blocks(struct inode *inode, loff_t offset,
size_t count)
ssize_t f2fs_preallocate_blocks(struct kiocb *iocb, struct iov_iter *from)
{
struct inode *inode = file_inode(iocb->ki_filp);
struct f2fs_map_blocks map;
ssize_t ret = 0;
map.m_lblk = F2FS_BYTES_TO_BLK(offset);
map.m_len = F2FS_BYTES_TO_BLK(count);
map.m_lblk = F2FS_BYTES_TO_BLK(iocb->ki_pos);
map.m_len = F2FS_BYTES_TO_BLK(iov_iter_count(from));
map.m_next_pgofs = NULL;
return f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_DIO);
if (iocb->ki_flags & IOCB_DIRECT &&
!(f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode))) {
ret = f2fs_convert_inline_inode(inode);
if (ret)
return ret;
ret = f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_PRE_DIO);
}
return ret;
}
/*
@ -670,7 +678,8 @@ next_block:
map->m_len = 1;
} else if ((map->m_pblk != NEW_ADDR &&
blkaddr == (map->m_pblk + ofs)) ||
(map->m_pblk == NEW_ADDR && blkaddr == NEW_ADDR)) {
(map->m_pblk == NEW_ADDR && blkaddr == NEW_ADDR) ||
flag == F2FS_GET_BLOCK_PRE_DIO) {
ofs++;
map->m_len++;
} else {
@ -1615,34 +1624,21 @@ static int check_direct_IO(struct inode *inode, struct iov_iter *iter,
static ssize_t f2fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
loff_t offset)
{
struct file *file = iocb->ki_filp;
struct address_space *mapping = file->f_mapping;
struct address_space *mapping = iocb->ki_filp->f_mapping;
struct inode *inode = mapping->host;
size_t count = iov_iter_count(iter);
int err;
/* we don't need to use inline_data strictly */
err = f2fs_convert_inline_inode(inode);
err = check_direct_IO(inode, iter, offset);
if (err)
return err;
if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode))
return 0;
err = check_direct_IO(inode, iter, offset);
if (err)
return err;
trace_f2fs_direct_IO_enter(inode, offset, count, iov_iter_rw(iter));
if (iov_iter_rw(iter) == WRITE) {
err = __allocate_data_blocks(inode, offset, count);
if (err)
goto out;
}
err = blockdev_direct_IO(iocb, inode, iter, offset, get_data_block_dio);
out:
if (err < 0 && iov_iter_rw(iter) == WRITE)
f2fs_write_failed(mapping, offset + count);

2
fs/f2fs/f2fs.h
View File

@ -391,6 +391,7 @@ struct f2fs_map_blocks {
#define F2FS_GET_BLOCK_DIO 1
#define F2FS_GET_BLOCK_FIEMAP 2
#define F2FS_GET_BLOCK_BMAP 3
#define F2FS_GET_BLOCK_PRE_DIO 4
/*
* i_advise uses FADVISE_XXX_BIT. We can add additional hints later.
@ -1905,6 +1906,7 @@ void f2fs_submit_page_mbio(struct f2fs_io_info *);
void set_data_blkaddr(struct dnode_of_data *);
int reserve_new_block(struct dnode_of_data *);
int f2fs_get_block(struct dnode_of_data *, pgoff_t);
ssize_t f2fs_preallocate_blocks(struct kiocb *, struct iov_iter *);
int f2fs_reserve_block(struct dnode_of_data *, pgoff_t);
struct page *get_read_data_page(struct inode *, pgoff_t, int, bool);
struct page *find_data_page(struct inode *, pgoff_t);

22
fs/f2fs/file.c
View File

@ -1873,14 +1873,32 @@ long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
static ssize_t f2fs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
{
struct inode *inode = file_inode(iocb->ki_filp);
struct file *file = iocb->ki_filp;
struct inode *inode = file_inode(file);
ssize_t ret;
if (f2fs_encrypted_inode(inode) &&
!f2fs_has_encryption_key(inode) &&
f2fs_get_encryption_info(inode))
return -EACCES;
return generic_file_write_iter(iocb, from);
inode_lock(inode);
ret = generic_write_checks(iocb, from);
if (ret > 0) {
ret = f2fs_preallocate_blocks(iocb, from);
if (!ret)
ret = __generic_file_write_iter(iocb, from);
}
inode_unlock(inode);
if (ret > 0) {
ssize_t err;
err = generic_write_sync(file, iocb->ki_pos - ret, ret);
if (err < 0)
ret = err;
}
return ret;
}
#ifdef CONFIG_COMPAT