len = left;
ret = __generic_file_splice_read(in, ppos, pipe, len, flags);
- if (ret > 0)
+ if (ret > 0) {
*ppos += ret;
+ file_accessed(in);
+ }
return ret;
}
return res;
}
-static ssize_t kernel_writev(struct file *file, const struct iovec *vec,
- unsigned long vlen, loff_t *ppos)
+static ssize_t kernel_write(struct file *file, const char *buf, size_t count,
+ loff_t pos)
{
mm_segment_t old_fs;
ssize_t res;
old_fs = get_fs();
set_fs(get_ds());
/* The cast to a user pointer is valid due to the set_fs() */
- res = vfs_writev(file, (const struct iovec __user *)vec, vlen, ppos);
+ res = vfs_write(file, (const char __user *)buf, count, &pos);
set_fs(old_fs);
return res;
}
res = kernel_readv(in, vec, spd.nr_pages, *ppos);
- if (res < 0)
+ if (res < 0) {
+ error = res;
goto err;
+ }
error = 0;
if (!res)
ret = buf->ops->confirm(pipe, buf);
if (!ret) {
more = (sd->flags & SPLICE_F_MORE) || sd->len < sd->total_len;
-
- ret = file->f_op->sendpage(file, buf->page, buf->offset,
- sd->len, &pos, more);
+ if (file->f_op && file->f_op->sendpage)
+ ret = file->f_op->sendpage(file, buf->page, buf->offset,
+ sd->len, &pos, more);
+ else
+ ret = -EINVAL;
}
return ret;
mutex_lock_nested(&inode->i_mutex, I_MUTEX_CHILD);
ret = file_remove_suid(out);
- if (!ret)
+ if (!ret) {
+ file_update_time(out);
ret = splice_from_pipe_feed(pipe, &sd, pipe_to_file);
+ }
mutex_unlock(&inode->i_mutex);
} while (ret > 0);
splice_from_pipe_end(pipe, &sd);
if (ret > 0) {
unsigned long nr_pages;
+ int err;
- *ppos += ret;
nr_pages = (ret + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
- /*
- * If file or inode is SYNC and we actually wrote some data,
- * sync it.
- */
- if (unlikely((out->f_flags & O_SYNC) || IS_SYNC(inode))) {
- int err;
-
- mutex_lock(&inode->i_mutex);
- err = generic_osync_inode(inode, mapping,
- OSYNC_METADATA|OSYNC_DATA);
- mutex_unlock(&inode->i_mutex);
-
- if (err)
- ret = err;
- }
+ err = generic_write_sync(out, *ppos, ret);
+ if (err)
+ ret = err;
+ else
+ *ppos += ret;
balance_dirty_pages_ratelimited_nr(mapping, nr_pages);
}
EXPORT_SYMBOL(generic_file_splice_write);
-static struct pipe_buffer *nth_pipe_buf(struct pipe_inode_info *pipe, int n)
+static int write_pipe_buf(struct pipe_inode_info *pipe, struct pipe_buffer *buf,
+ struct splice_desc *sd)
{
- return &pipe->bufs[(pipe->curbuf + n) % PIPE_BUFFERS];
+ int ret;
+ void *data;
+
+ ret = buf->ops->confirm(pipe, buf);
+ if (ret)
+ return ret;
+
+ data = buf->ops->map(pipe, buf, 0);
+ ret = kernel_write(sd->u.file, data + buf->offset, sd->len, sd->pos);
+ buf->ops->unmap(pipe, buf, data);
+
+ return ret;
}
static ssize_t default_file_splice_write(struct pipe_inode_info *pipe,
struct file *out, loff_t *ppos,
size_t len, unsigned int flags)
{
- ssize_t ret = 0;
- ssize_t total_len = 0;
- int do_wakeup = 0;
-
- pipe_lock(pipe);
- while (len) {
- struct pipe_buffer *buf;
- void *data[PIPE_BUFFERS];
- struct iovec vec[PIPE_BUFFERS];
- unsigned int nr_pages = 0;
- unsigned int write_len = 0;
- unsigned int now_len = len;
- unsigned int this_len;
- int i;
-
- BUG_ON(pipe->nrbufs > PIPE_BUFFERS);
- for (i = 0; i < pipe->nrbufs && now_len; i++) {
- buf = nth_pipe_buf(pipe, i);
-
- ret = buf->ops->confirm(pipe, buf);
- if (ret)
- break;
-
- data[i] = buf->ops->map(pipe, buf, 0);
- this_len = min(buf->len, now_len);
- vec[i].iov_base = (void __user *) data[i] + buf->offset;
- vec[i].iov_len = this_len;
- now_len -= this_len;
- write_len += this_len;
- nr_pages++;
- }
-
- if (nr_pages) {
- ret = kernel_writev(out, vec, nr_pages, ppos);
- if (ret == 0)
- ret = -EIO;
- if (ret > 0) {
- len -= ret;
- total_len += ret;
- }
- }
-
- for (i = 0; i < nr_pages; i++) {
- buf = nth_pipe_buf(pipe, i);
- buf->ops->unmap(pipe, buf, data[i]);
-
- if (ret > 0) {
- this_len = min_t(unsigned, vec[i].iov_len, ret);
- buf->offset += this_len;
- buf->len -= this_len;
- ret -= this_len;
- }
- }
-
- if (ret < 0)
- break;
-
- while (pipe->nrbufs) {
- const struct pipe_buf_operations *ops;
-
- buf = nth_pipe_buf(pipe, 0);
- if (buf->len)
- break;
-
- ops = buf->ops;
- buf->ops = NULL;
- ops->release(pipe, buf);
- pipe->curbuf = (pipe->curbuf + 1) % PIPE_BUFFERS;
- pipe->nrbufs--;
- if (pipe->inode)
- do_wakeup = 1;
- }
-
- if (pipe->nrbufs)
- continue;
- if (!pipe->writers)
- break;
- if (!pipe->waiting_writers) {
- if (total_len)
- break;
- }
-
- if (flags & SPLICE_F_NONBLOCK) {
- ret = -EAGAIN;
- break;
- }
-
- if (signal_pending(current)) {
- ret = -ERESTARTSYS;
- break;
- }
-
- if (do_wakeup) {
- wakeup_pipe_writers(pipe);
- do_wakeup = 0;
- }
-
- pipe_wait(pipe);
- }
- pipe_unlock(pipe);
+ ssize_t ret;
- if (do_wakeup)
- wakeup_pipe_writers(pipe);
+ ret = splice_from_pipe(pipe, out, ppos, len, flags, write_pipe_buf);
+ if (ret > 0)
+ *ppos += ret;
- return total_len ? total_len : ret;
+ return ret;
}
/**
if (unlikely(ret < 0))
return ret;
- splice_write = out->f_op->splice_write;
- if (!splice_write)
+ if (out->f_op && out->f_op->splice_write)
+ splice_write = out->f_op->splice_write;
+ else
splice_write = default_file_splice_write;
return splice_write(pipe, out, ppos, len, flags);
if (unlikely(ret < 0))
return ret;
- splice_read = in->f_op->splice_read;
- if (!splice_read)
+ if (in->f_op && in->f_op->splice_read)
+ splice_read = in->f_op->splice_read;
+ else
splice_read = default_file_splice_read;
return splice_read(in, ppos, pipe, len, flags);
if (off_in)
return -ESPIPE;
if (off_out) {
- if (out->f_op->llseek == no_llseek)
+ if (!out->f_op || !out->f_op->llseek ||
+ out->f_op->llseek == no_llseek)
return -EINVAL;
if (copy_from_user(&offset, off_out, sizeof(loff_t)))
return -EFAULT;
if (off_out)
return -ESPIPE;
if (off_in) {
- if (in->f_op->llseek == no_llseek)
+ if (!in->f_op || !in->f_op->llseek ||
+ in->f_op->llseek == no_llseek)
return -EINVAL;
if (copy_from_user(&offset, off_in, sizeof(loff_t)))
return -EFAULT;
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff