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Commit bcdfeb2e authored by Yan, Zheng's avatar Yan, Zheng Committed by Sage Weil
Browse files

ceph: remove xattr when null value is given to setxattr() 



For the setxattr request, introduce a new flag CEPH_XATTR_REMOVE
to distinguish null value case from the zero-length value case.

Signed-off-by: default avatarYan, Zheng <zheng.z.yan@intel.com>
parent fbc0b970

fs/ceph/xattr.c

+14 −2
Original line number Diff line number Diff line
@@ -12,6 +12,9 @@ 
#define XATTR_CEPH_PREFIX "ceph."

#define XATTR_CEPH_PREFIX_LEN (sizeof (XATTR_CEPH_PREFIX) - 1)



static int __remove_xattr(struct ceph_inode_info *ci,

			  struct ceph_inode_xattr *xattr);



/*

 * List of handlers for synthetic system.* attributes. Other

 * attributes are handled directly.
@@ -359,6 +362,12 @@ static int __set_xattr(struct ceph_inode_info *ci, 
			kfree(val);

			return err;

		}

		if (update_xattr < 0) {

			if (xattr)

				__remove_xattr(ci, xattr);

			kfree(name);

			return 0;

		}

	}



	if (!xattr) {
@@ -862,6 +871,9 @@ static int ceph_sync_setxattr(struct dentry *dentry, const char *name, 


	dout("setxattr value=%.*s\n", (int)size, value);



	if (!value)

		flags |= CEPH_XATTR_REMOVE;



	/* do request */

	req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETXATTR,

				       USE_AUTH_MDS);
@@ -965,8 +977,8 @@ retry: 
		goto retry;

	}



	err = __set_xattr(ci, newname, name_len, newval,

			  val_len, flags, 1, &xattr);

	err = __set_xattr(ci, newname, name_len, newval, val_len,

			  flags, value ? 1 : -1, &xattr);



	if (!err) {

		dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_XATTR_EXCL);

include/linux/ceph/ceph_fs.h

+3 −2
Original line number Diff line number Diff line
@@ -373,8 +373,9 @@ extern const char *ceph_mds_op_name(int op); 
/*

 * Ceph setxattr request flags.

 */

#define CEPH_XATTR_CREATE  1

#define CEPH_XATTR_REPLACE 2

#define CEPH_XATTR_CREATE  (1 << 0)

#define CEPH_XATTR_REPLACE (1 << 1)

#define CEPH_XATTR_REMOVE  (1 << 31)



union ceph_mds_request_args {

	struct {