return ret;
}
-static ssize_t do_iter_read(struct file *file, struct iov_iter *iter,
- loff_t *pos, rwf_t flags)
+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))
tot_len = iov_iter_count(iter);
if (!tot_len)
goto out;
- ret = rw_verify_area(READ, file, pos, tot_len);
+ ret = rw_verify_area(READ, file, &iocb->ki_pos, tot_len);
if (ret < 0)
return ret;
- if (file->f_op->read_iter)
- ret = do_iter_readv_writev(file, iter, pos, READ, flags);
- else
- ret = do_loop_readv_writev(file, iter, pos, READ, flags);
+ 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_iocb_iter_read(struct file *file, struct kiocb *iocb,
- struct iov_iter *iter)
+ssize_t vfs_iter_read(struct file *file, struct iov_iter *iter, loff_t *ppos,
+ rwf_t flags)
{
size_t tot_len;
ssize_t ret = 0;
tot_len = iov_iter_count(iter);
if (!tot_len)
goto out;
- ret = rw_verify_area(READ, file, &iocb->ki_pos, tot_len);
+ ret = rw_verify_area(READ, file, ppos, tot_len);
if (ret < 0)
return ret;
- ret = call_read_iter(file, iocb, iter);
+ ret = do_iter_readv_writev(file, iter, ppos, READ, flags);
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)
-{
- if (!file->f_op->read_iter)
- return -EINVAL;
- return do_iter_read(file, iter, ppos, flags);
-}
EXPORT_SYMBOL(vfs_iter_read);
-static ssize_t do_iter_write(struct file *file, struct iov_iter *iter,
- loff_t *pos, rwf_t flags)
+/*
+ * Caller is responsible for calling kiocb_end_write() on completion
+ * if async iocb was queued.
+ */
+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))
tot_len = iov_iter_count(iter);
if (!tot_len)
return 0;
- ret = rw_verify_area(WRITE, file, pos, tot_len);
+ ret = rw_verify_area(WRITE, file, &iocb->ki_pos, tot_len);
if (ret < 0)
return ret;
- if (file->f_op->write_iter)
- ret = do_iter_readv_writev(file, iter, pos, WRITE, flags);
- else
- ret = do_loop_readv_writev(file, iter, pos, WRITE, flags);
+ kiocb_start_write(iocb);
+ ret = call_write_iter(file, iocb, iter);
+ if (ret != -EIOCBQUEUED)
+ kiocb_end_write(iocb);
if (ret > 0)
fsnotify_modify(file);
+
return ret;
}
+EXPORT_SYMBOL(vfs_iocb_iter_write);
-ssize_t vfs_iocb_iter_write(struct file *file, struct kiocb *iocb,
- struct iov_iter *iter)
+ssize_t vfs_iter_write(struct file *file, struct iov_iter *iter, loff_t *ppos,
+ rwf_t flags)
{
size_t tot_len;
- ssize_t ret = 0;
+ ssize_t ret;
- 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;
+ if (!file->f_op->write_iter)
+ return -EINVAL;
tot_len = iov_iter_count(iter);
if (!tot_len)
return 0;
- ret = rw_verify_area(WRITE, file, &iocb->ki_pos, tot_len);
+
+ ret = rw_verify_area(WRITE, file, ppos, tot_len);
if (ret < 0)
return ret;
- ret = call_write_iter(file, iocb, iter);
+ file_start_write(file);
+ ret = do_iter_readv_writev(file, iter, ppos, WRITE, flags);
if (ret > 0)
fsnotify_modify(file);
+ file_end_write(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)
-{
- if (!file->f_op->write_iter)
- return -EINVAL;
- return do_iter_write(file, iter, ppos, flags);
-}
EXPORT_SYMBOL(vfs_iter_write);
static ssize_t vfs_readv(struct file *file, const struct iovec __user *vec,
- unsigned long vlen, loff_t *pos, rwf_t flags)
+ unsigned long vlen, loff_t *pos, rwf_t flags)
{
struct iovec iovstack[UIO_FASTIOV];
struct iovec *iov = iovstack;
struct iov_iter iter;
- ssize_t ret;
+ size_t tot_len;
+ ssize_t ret = 0;
- ret = import_iovec(ITER_DEST, vec, vlen, ARRAY_SIZE(iovstack), &iov, &iter);
- if (ret >= 0) {
- ret = do_iter_read(file, &iter, pos, flags);
- kfree(iov);
- }
+ if (!(file->f_mode & FMODE_READ))
+ return -EBADF;
+ if (!(file->f_mode & FMODE_CAN_READ))
+ return -EINVAL;
+
+ ret = import_iovec(ITER_DEST, vec, vlen, ARRAY_SIZE(iovstack), &iov,
+ &iter);
+ if (ret < 0)
+ return ret;
+ tot_len = iov_iter_count(&iter);
+ if (!tot_len)
+ goto out;
+
+ ret = rw_verify_area(READ, file, pos, tot_len);
+ if (ret < 0)
+ goto out;
+
+ if (file->f_op->read_iter)
+ ret = do_iter_readv_writev(file, &iter, pos, READ, flags);
+ else
+ ret = do_loop_readv_writev(file, &iter, pos, READ, flags);
+out:
+ if (ret >= 0)
+ fsnotify_access(file);
+ kfree(iov);
return ret;
}
static ssize_t vfs_writev(struct file *file, const struct iovec __user *vec,
- unsigned long vlen, loff_t *pos, rwf_t flags)
+ unsigned long vlen, loff_t *pos, rwf_t flags)
{
struct iovec iovstack[UIO_FASTIOV];
struct iovec *iov = iovstack;
struct iov_iter iter;
- ssize_t ret;
+ size_t tot_len;
+ ssize_t ret = 0;
- ret = import_iovec(ITER_SOURCE, vec, vlen, ARRAY_SIZE(iovstack), &iov, &iter);
- if (ret >= 0) {
- file_start_write(file);
- ret = do_iter_write(file, &iter, pos, flags);
- file_end_write(file);
- kfree(iov);
- }
+ if (!(file->f_mode & FMODE_WRITE))
+ return -EBADF;
+ if (!(file->f_mode & FMODE_CAN_WRITE))
+ return -EINVAL;
+
+ ret = import_iovec(ITER_SOURCE, vec, vlen, ARRAY_SIZE(iovstack), &iov,
+ &iter);
+ if (ret < 0)
+ return ret;
+
+ tot_len = iov_iter_count(&iter);
+ if (!tot_len)
+ goto out;
+
+ ret = rw_verify_area(WRITE, file, pos, tot_len);
+ if (ret < 0)
+ goto out;
+
+ file_start_write(file);
+ if (file->f_op->write_iter)
+ ret = do_iter_readv_writev(file, &iter, pos, WRITE, flags);
+ else
+ ret = do_loop_readv_writev(file, &iter, pos, WRITE, flags);
+ if (ret > 0)
+ fsnotify_modify(file);
+ file_end_write(file);
+out:
+ kfree(iov);
return ret;
}
struct file *file_out, loff_t pos_out,
size_t len, unsigned int flags)
{
- lockdep_assert(sb_write_started(file_inode(file_out)->i_sb));
-
- return do_splice_direct(file_in, &pos_in, file_out, &pos_out,
- len > MAX_RW_COUNT ? MAX_RW_COUNT : len, 0);
+ return splice_file_range(file_in, &pos_in, file_out, &pos_out,
+ min_t(size_t, len, MAX_RW_COUNT));
}
EXPORT_SYMBOL(generic_copy_file_range);
projects / linux-2.6-microblaze.git / blobdiff