ceph: update readpages osd request according to size of pages
commit d641df819d
upstream.
add_to_page_cache_lru() can fails, so the actual pages to read
can be smaller than the initial size of osd request. We need to
update osd request size in that case.
Signed-off-by: Yan, Zheng <zyan@redhat.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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parent
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@ -363,6 +363,7 @@ static int start_read(struct inode *inode, struct list_head *page_list, int max)
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nr_pages = i;
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if (nr_pages > 0) {
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len = nr_pages << PAGE_SHIFT;
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osd_req_op_extent_update(req, 0, len);
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break;
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}
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goto out_pages;
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@ -672,7 +672,8 @@ void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
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BUG_ON(length > previous);
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op->extent.length = length;
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op->indata_len -= previous - length;
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if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL)
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op->indata_len -= previous - length;
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}
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EXPORT_SYMBOL(osd_req_op_extent_update);
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