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Commit 0aeff37a authored by Yan, Zheng's avatar Yan, Zheng Committed by Ilya Dryomov
Browse files

ceph: fix setting empty extended attribute 



make sure 'value' is not null. otherwise __ceph_setxattr will remove
the extended attribute.

Signed-off-by: default avatarYan, Zheng <zyan@redhat.com>
Reviewed-by: default avatarSage Weil <sage@redhat.com>
parent 275dd19e

fs/ceph/xattr.c

+5 −2
Original line number Diff line number Diff line
@@ -854,7 +854,7 @@ static int ceph_sync_setxattr(struct dentry *dentry, const char *name, 
	struct ceph_pagelist *pagelist = NULL;

	int err;



	if (value) {

	if (size > 0) {

		/* copy value into pagelist */

		pagelist = kmalloc(sizeof(*pagelist), GFP_NOFS);

		if (!pagelist)
@@ -864,7 +864,7 @@ static int ceph_sync_setxattr(struct dentry *dentry, const char *name, 
		err = ceph_pagelist_append(pagelist, value, size);

		if (err)

			goto out;

	} else {

	} else if (!value) {

		flags |= CEPH_XATTR_REMOVE;

	}
@@ -1001,6 +1001,9 @@ int ceph_setxattr(struct dentry *dentry, const char *name, 
	if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN))

		return generic_setxattr(dentry, name, value, size, flags);



	if (size == 0)

		value = "";  /* empty EA, do not remove */



	return __ceph_setxattr(dentry, name, value, size, flags);

}