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ceph: mark user pages dirty on direct-io reads

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For read operation, we have to set the argument _write_ of get_user_pages
to 1 since we will write data to pages. Also, we need to SetPageDirty before
releasing these pages.

Signed-off-by: Henry C Chang <henry_c_chang@tcloudcomputing.com>
Signed-off-by: Sage Weil <sage@newdream.net>
This commit is contained in:
Henry C Chang 2010-12-15 20:45:41 -08:00 • committed by Sage Weil
parent 92cf765237
commit b6aa5901c7
3 changed files with 15 additions and 10 deletions
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8
fs/ceph/file.c
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@ -384,7 +384,7 @@ static ssize_t ceph_sync_read(struct file *file, char __user *data,
if (file->f_flags & O_DIRECT) {
num_pages = calc_pages_for((unsigned long)data, len);
pages = ceph_get_direct_page_vector(data, num_pages);
pages = ceph_get_direct_page_vector(data, num_pages, true);
} else {
num_pages = calc_pages_for(off, len);
pages = ceph_alloc_page_vector(num_pages, GFP_NOFS);
@ -413,7 +413,7 @@ static ssize_t ceph_sync_read(struct file *file, char __user *data,
done:
if (file->f_flags & O_DIRECT)
ceph_put_page_vector(pages, num_pages);
ceph_put_page_vector(pages, num_pages, true);
else
ceph_release_page_vector(pages, num_pages);
dout("sync_read result %d\n", ret);
@ -522,7 +522,7 @@ more:
return -ENOMEM;
if (file->f_flags & O_DIRECT) {
pages = ceph_get_direct_page_vector(data, num_pages);
pages = ceph_get_direct_page_vector(data, num_pages, false);
if (IS_ERR(pages)) {
ret = PTR_ERR(pages);
goto out;
@ -572,7 +572,7 @@ more:
}
if (file->f_flags & O_DIRECT)
ceph_put_page_vector(pages, num_pages);
ceph_put_page_vector(pages, num_pages, false);
else if (file->f_flags & O_SYNC)
ceph_release_page_vector(pages, num_pages);