diff options
Diffstat (limited to 'fs/read_write.c')
| -rw-r--r-- | fs/read_write.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/fs/read_write.c b/fs/read_write.c index 7458fccc59e1..59d819c5b92e 100644 --- a/fs/read_write.c +++ b/fs/read_write.c @@ -939,6 +939,34 @@ out: return ret; } +ssize_t vfs_iocb_iter_read(struct file *file, struct kiocb *iocb, + struct iov_iter *iter) +{ + size_t tot_len; + ssize_t ret = 0; + + if (!file->f_op->read_iter) + return -EINVAL; + if (!(file->f_mode & FMODE_READ)) + return -EBADF; + if (!(file->f_mode & FMODE_CAN_READ)) + return -EINVAL; + + tot_len = iov_iter_count(iter); + if (!tot_len) + goto out; + ret = rw_verify_area(READ, file, &iocb->ki_pos, tot_len); + if (ret < 0) + return ret; + + ret = call_read_iter(file, iocb, iter); +out: + if (ret >= 0) + fsnotify_access(file); + return ret; +} +EXPORT_SYMBOL(vfs_iocb_iter_read); + ssize_t vfs_iter_read(struct file *file, struct iov_iter *iter, loff_t *ppos, rwf_t flags) { @@ -975,6 +1003,34 @@ static ssize_t do_iter_write(struct file *file, struct iov_iter *iter, return ret; } +ssize_t vfs_iocb_iter_write(struct file *file, struct kiocb *iocb, + struct iov_iter *iter) +{ + size_t tot_len; + ssize_t ret = 0; + + if (!file->f_op->write_iter) + return -EINVAL; + if (!(file->f_mode & FMODE_WRITE)) + return -EBADF; + if (!(file->f_mode & FMODE_CAN_WRITE)) + return -EINVAL; + + tot_len = iov_iter_count(iter); + if (!tot_len) + return 0; + ret = rw_verify_area(WRITE, file, &iocb->ki_pos, tot_len); + if (ret < 0) + return ret; + + ret = call_write_iter(file, iocb, iter); + if (ret > 0) + fsnotify_modify(file); + + return ret; +} +EXPORT_SYMBOL(vfs_iocb_iter_write); + ssize_t vfs_iter_write(struct file *file, struct iov_iter *iter, loff_t *ppos, rwf_t flags) { |