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Commit 702aeb1f authored by Sage Weil's avatar Sage Weil Committed by Alex Elder
Browse files

ceph: fully initialize new layout 



When we are setting a new layout, fully initialize the structure:
 - zero it out
 - always set preferred_osd to -1

Signed-off-by: default avatarSage Weil <sage@inktank.com>
Reviewed-by: default avatarAlex Elder <elder@inktank.com>
parent fd51653f

fs/ceph/ioctl.c

+13 −6
Original line number Diff line number Diff line
@@ -80,22 +80,29 @@ static long ceph_ioctl_set_layout(struct file *file, void __user *arg) 


	/* validate changed params against current layout */

	err = ceph_do_getattr(file->f_dentry->d_inode, CEPH_STAT_CAP_LAYOUT);

	if (!err) {

		nl.stripe_unit = ceph_file_layout_su(ci->i_layout);

		nl.stripe_count = ceph_file_layout_stripe_count(ci->i_layout);

		nl.object_size = ceph_file_layout_object_size(ci->i_layout);

		nl.data_pool = le32_to_cpu(ci->i_layout.fl_pg_pool);

	} else

	if (err)

		return err;



	memset(&nl, 0, sizeof(nl));

	if (l.stripe_count)

		nl.stripe_count = l.stripe_count;

	else

		nl.stripe_count = ceph_file_layout_stripe_count(ci->i_layout);

	if (l.stripe_unit)

		nl.stripe_unit = l.stripe_unit;

	else

		nl.stripe_unit = ceph_file_layout_su(ci->i_layout);

	if (l.object_size)

		nl.object_size = l.object_size;

	else

		nl.object_size = ceph_file_layout_object_size(ci->i_layout);

	if (l.data_pool)

		nl.data_pool = l.data_pool;

	else

		nl.data_pool = ceph_file_layout_pg_pool(ci->i_layout);



	/* this is obsolete, and always -1 */

	nl.preferred_osd = le64_to_cpu(-1);



	err = __validate_layout(mdsc, &nl);

	if (err)

fs/ceph/ioctl.h

+2 −0
Original line number Diff line number Diff line
@@ -34,6 +34,8 @@ 
struct ceph_ioctl_layout {

	__u64 stripe_unit, stripe_count, object_size;

	__u64 data_pool;



	/* obsolete.  new values ignored, always return -1 */

	__s64 preferred_osd;

};