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btrfs: Use iocb to derive pos instead of passing a separate parameter 

struct kiocb carries the ki_pos, so there is no need to pass it as
a separate function parameter.

generic_file_direct_write() increments ki_pos, so we now assign pos
after the function.

Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Reviewed-by: Misono Tomohiro <misono.tomohiro@jp.fujitsu.com>
[ rename to btrfs_buffered_write ]
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Goldwyn Rodrigues 2018-06-17 12:39:47 -05:00 committed by David Sterba
parent 893bf4b115
commit e4af400a9c
1 changed files with 8 additions and 7 deletions
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15
fs/btrfs/file.c
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@ -1568,10 +1568,11 @@ static noinline int check_can_nocow(struct btrfs_inode *inode, loff_t pos,
return ret; return ret;
} }
static noinline ssize_t __btrfs_buffered_write(struct file *file, static noinline ssize_t btrfs_buffered_write(struct kiocb *iocb,
struct iov_iter *i, struct iov_iter *i)
loff_t pos)
{ {
struct file *file = iocb->ki_filp;
loff_t pos = iocb->ki_pos;
struct inode *inode = file_inode(file); struct inode *inode = file_inode(file);
struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb); struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
struct btrfs_root *root = BTRFS_I(inode)->root; struct btrfs_root *root = BTRFS_I(inode)->root;
@ -1803,7 +1804,7 @@ static ssize_t __btrfs_direct_write(struct kiocb *iocb, struct iov_iter *from)
{ {
struct file *file = iocb->ki_filp; struct file *file = iocb->ki_filp;
struct inode *inode = file_inode(file); struct inode *inode = file_inode(file);
loff_t pos = iocb->ki_pos; loff_t pos;
ssize_t written; ssize_t written;
ssize_t written_buffered; ssize_t written_buffered;
loff_t endbyte; loff_t endbyte;
@ -1814,8 +1815,8 @@ static ssize_t __btrfs_direct_write(struct kiocb *iocb, struct iov_iter *from)
if (written < 0 || !iov_iter_count(from)) if (written < 0 || !iov_iter_count(from))
return written; return written;
pos += written; pos = iocb->ki_pos;
written_buffered = __btrfs_buffered_write(file, from, pos); written_buffered = btrfs_buffered_write(iocb, from);
if (written_buffered < 0) { if (written_buffered < 0) {
err = written_buffered; err = written_buffered;
goto out; goto out;
@ -1952,7 +1953,7 @@ static ssize_t btrfs_file_write_iter(struct kiocb *iocb,
if (iocb->ki_flags & IOCB_DIRECT) { if (iocb->ki_flags & IOCB_DIRECT) {
num_written = __btrfs_direct_write(iocb, from); num_written = __btrfs_direct_write(iocb, from);
} else { } else {
num_written = __btrfs_buffered_write(file, from, pos); num_written = btrfs_buffered_write(iocb, from);
if (num_written > 0) if (num_written > 0)
iocb->ki_pos = pos + num_written; iocb->ki_pos = pos + num_written;
if (clean_page) if (clean_page)