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orangefs: explicitly pass the size to pvfs_bufmap_copy_to_iovec()

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
This commit is contained in:
Al Viro 2015-10-08 17:43:58 -04:00 committed by Mike Marshall
parent 548049495c
commit 5c278228bb
3 changed files with 19 additions and 16 deletions
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3
fs/orangefs/file.c
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@ -89,7 +89,8 @@ static int postcopy_buffers(struct pvfs2_bufmap *bufmap,
iov_iter_init(&iter, READ, vec, nr_segs, total_size);
ret = pvfs_bufmap_copy_to_iovec(bufmap,
&iter,
buffer_index);
buffer_index,
total_size);
if (ret < 0)
gossip_err("%s: Failed to copy-out buffers. Please make sure that the pvfs2-client is running (%ld)\n",
__func__,

29
fs/orangefs/pvfs2-bufmap.c
View File

@ -542,25 +542,26 @@ int pvfs_bufmap_copy_from_iovec(struct pvfs2_bufmap *bufmap,
*/
int pvfs_bufmap_copy_to_iovec(struct pvfs2_bufmap *bufmap,
struct iov_iter *iter,
int buffer_index)
int buffer_index,
size_t size)
{
struct pvfs_bufmap_desc *from;
struct page *page;
struct pvfs_bufmap_desc *from = &bufmap->desc_array[buffer_index];
int i;
size_t written;
gossip_debug(GOSSIP_BUFMAP_DEBUG,
"%s: buffer_index:%d: iov_iter_count(iter):%lu:\n",
__func__, buffer_index, iov_iter_count(iter));
"%s: buffer_index:%d: size:%zu:\n",
__func__, buffer_index, size);
from = &bufmap->desc_array[buffer_index];
for (i = 0; iov_iter_count(iter); i++) {
page = from->page_array[i];
written = copy_page_to_iter(page, 0, PAGE_SIZE, iter);
if ((written == 0) && (iov_iter_count(iter)))
break;
for (i = 0; size; i++) {
struct page *page = from->page_array[i];
size_t n = size;
if (n > PAGE_SIZE)
n = PAGE_SIZE;
n = copy_page_to_iter(page, 0, n, iter);
if (!n)
return -EFAULT;
size -= n;
}
return iov_iter_count(iter) ? -EFAULT : 0;
return 0;
}

3
fs/orangefs/pvfs2-bufmap.h
View File

@ -49,7 +49,8 @@ int pvfs_bufmap_copy_from_iovec(struct pvfs2_bufmap *bufmap,
int pvfs_bufmap_copy_to_iovec(struct pvfs2_bufmap *bufmap,
struct iov_iter *iter,
int buffer_index);
int buffer_index,
size_t size);
size_t pvfs_bufmap_copy_to_user_task_iovec(struct task_struct *tsk,
struct iovec *iovec,