blkdev_write_iter: expand generic_file_checks() call in there
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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@ -1595,18 +1595,21 @@ static long block_ioctl(struct file *file, unsigned cmd, unsigned long arg)
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ssize_t blkdev_write_iter(struct kiocb *iocb, struct iov_iter *from)
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ssize_t blkdev_write_iter(struct kiocb *iocb, struct iov_iter *from)
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{
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{
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struct file *file = iocb->ki_filp;
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struct file *file = iocb->ki_filp;
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struct inode *bd_inode = file->f_mapping->host;
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loff_t size = i_size_read(bd_inode);
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struct blk_plug plug;
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struct blk_plug plug;
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ssize_t ret;
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ssize_t ret;
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size_t count = iov_iter_count(from);
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ret = generic_write_checks(file, &iocb->ki_pos, &count, 1);
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if (bdev_read_only(I_BDEV(bd_inode)))
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if (ret)
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return -EPERM;
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return ret;
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if (count == 0)
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if (!iov_iter_count(from))
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return 0;
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return 0;
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iov_iter_truncate(from, count);
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if (iocb->ki_pos >= size)
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return -ENOSPC;
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iov_iter_truncate(from, size - iocb->ki_pos);
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blk_start_plug(&plug);
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blk_start_plug(&plug);
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ret = __generic_file_write_iter(iocb, from);
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ret = __generic_file_write_iter(iocb, from);
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