diff options
| -rw-r--r-- | fs/f2fs/data.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index 991e36835df8..e0965b43d16e 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -953,11 +953,33 @@ static int f2fs_write_end(struct file *file, return copied; } +static int check_direct_IO(struct inode *inode, int rw, + const struct iovec *iov, loff_t offset, unsigned long nr_segs) +{ + unsigned blocksize_mask = inode->i_sb->s_blocksize - 1; + int i; + + if (rw == READ) + return 0; + + if (offset & blocksize_mask) + return -EINVAL; + + for (i = 0; i < nr_segs; i++) + if (iov[i].iov_len & blocksize_mask) + return -EINVAL; + return 0; +} + static ssize_t f2fs_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov, loff_t offset, unsigned long nr_segs) { struct file *file = iocb->ki_filp; struct inode *inode = file->f_mapping->host; + + if (check_direct_IO(inode, rw, iov, offset, nr_segs)) + return 0; + return blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs, get_data_block); } |