kpriv/linux-hardened
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

btrfs: switch to ->write_iter()

Browse source 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2014-04-03 14:29:04 -04:00
parent 3ef045c3d8
commit b30ac0fc41
1 changed files with 10 additions and 14 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

24
fs/btrfs/file.c
View file

@ -447,7 +447,7 @@ static noinline int btrfs_copy_from_user(loff_t pos, int num_pages,
write_bytes -= copied;
total_copied += copied;
/* Return to btrfs_file_aio_write to fault page */
/* Return to btrfs_file_write_iter to fault page */
if (unlikely(copied == 0))
break;
@ -1708,9 +1708,8 @@ static void update_time_for_write(struct inode *inode)
inode_inc_iversion(inode);
}
static ssize_t btrfs_file_aio_write(struct kiocb *iocb,
const struct iovec *iov,
unsigned long nr_segs, loff_t pos)
static ssize_t btrfs_file_write_iter(struct kiocb *iocb,
struct iov_iter *from)
{
struct file *file = iocb->ki_filp;
struct inode *inode = file_inode(file);
@ -1719,15 +1718,12 @@ static ssize_t btrfs_file_aio_write(struct kiocb *iocb,
u64 end_pos;
ssize_t num_written = 0;
ssize_t err = 0;
size_t count;
size_t count = iov_iter_count(from);
bool sync = (file->f_flags & O_DSYNC) || IS_SYNC(file->f_mapping->host);
struct iov_iter i;
loff_t pos = iocb->ki_pos;
mutex_lock(&inode->i_mutex);
count = iov_length(iov, nr_segs);
iov_iter_init(&i, WRITE, iov, nr_segs, count);
current->backing_dev_info = inode->i_mapping->backing_dev_info;
err = generic_write_checks(file, &pos, &count, S_ISBLK(inode->i_mode));
if (err) {
@ -1740,7 +1736,7 @@ static ssize_t btrfs_file_aio_write(struct kiocb *iocb,
goto out;
}
iov_iter_truncate(&i, count);
iov_iter_truncate(from, count);
err = file_remove_suid(file);
if (err) {
@ -1783,9 +1779,9 @@ static ssize_t btrfs_file_aio_write(struct kiocb *iocb,
atomic_inc(&BTRFS_I(inode)->sync_writers);
if (unlikely(file->f_flags & O_DIRECT)) {
num_written = __btrfs_direct_write(iocb, &i, pos);
num_written = __btrfs_direct_write(iocb, from, pos);
} else {
num_written = __btrfs_buffered_write(file, &i, pos);
num_written = __btrfs_buffered_write(file, from, pos);
if (num_written > 0)
iocb->ki_pos = pos + num_written;
}
@ -2623,10 +2619,10 @@ out:
const struct file_operations btrfs_file_operations = {
.llseek = btrfs_file_llseek,
.read = new_sync_read,
.write = do_sync_write,
.write = new_sync_write,
.read_iter = generic_file_read_iter,
.splice_read = generic_file_splice_read,
.aio_write = btrfs_file_aio_write,
.write_iter = btrfs_file_write_iter,
.mmap = btrfs_file_mmap,
.open = generic_file_open,
.release = btrfs_release_file,