Commit dd980fc0 authored by Luis Henriques's avatar Luis Henriques Committed by Ilya Dryomov
Browse files

ceph: add ceph.caps vxattr 



Add a new vxattr that allows userspace to list the caps for a specific
directory or file.

[ jlayton: change format delimiter to '/' ]

Signed-off-by: default avatarLuis Henriques <lhenriques@suse.de>
Signed-off-by: default avatarJeff Layton <jlayton@kernel.org>
Signed-off-by: default avatarIlya Dryomov <idryomov@gmail.com>
parent bca9fc14

fs/ceph/xattr.c

+27 −0
Original line number Diff line number Diff line
@@ -321,6 +321,19 @@ static ssize_t ceph_vxattrcb_client_id(struct ceph_inode_info *ci, 
			      ceph_client_gid(fsc->client));

}



static ssize_t ceph_vxattrcb_caps(struct ceph_inode_info *ci, char *val,

					size_t size)

{

	int issued;



	spin_lock(&ci->i_ceph_lock);

	issued = __ceph_caps_issued(ci, NULL);

	spin_unlock(&ci->i_ceph_lock);



	return ceph_fmt_xattr(val, size, "%s/0x%x",

			      ceph_cap_string(issued), issued);

}



#define CEPH_XATTR_NAME(_type, _name)	XATTR_CEPH_PREFIX #_type "." #_name

#define CEPH_XATTR_NAME2(_type, _name, _name2)	\

	XATTR_CEPH_PREFIX #_type "." #_name "." #_name2
@@ -396,6 +409,13 @@ static struct ceph_vxattr ceph_dir_vxattrs[] = { 
		.exists_cb = ceph_vxattrcb_snap_btime_exists,

		.flags = VXATTR_FLAG_READONLY,

	},

	{

		.name = "ceph.caps",

		.name_size = sizeof("ceph.caps"),

		.getxattr_cb = ceph_vxattrcb_caps,

		.exists_cb = NULL,

		.flags = VXATTR_FLAG_HIDDEN,

	},

	{ .name = NULL, 0 }	/* Required table terminator */

};
@@ -421,6 +441,13 @@ static struct ceph_vxattr ceph_file_vxattrs[] = { 
		.exists_cb = ceph_vxattrcb_snap_btime_exists,

		.flags = VXATTR_FLAG_READONLY,

	},

	{

		.name = "ceph.caps",

		.name_size = sizeof("ceph.caps"),

		.getxattr_cb = ceph_vxattrcb_caps,

		.exists_cb = NULL,

		.flags = VXATTR_FLAG_HIDDEN,

	},

	{ .name = NULL, 0 }	/* Required table terminator */

};