int mdt_getxattr(struct mdt_thread_info *info)
{
struct ptlrpc_request *req = mdt_info_req(info);
struct mdt_export_data *med = mdt_req2med(req);
struct lu_ucred *uc = lu_ucred(info->mti_env);
struct mdt_body *reqbody;
struct mdt_body *repbody = NULL;
struct md_object *next;
struct lu_buf *buf;
__u32 remote = exp_connect_rmtclient(info->mti_exp);
__u32 perm;
int easize, rc;
obd_valid valid;
ENTRY;
LASSERT(info->mti_object != NULL);
LASSERT(lu_object_assert_exists(&info->mti_object->mot_obj));
CDEBUG(D_INODE, "getxattr "DFID"\n", PFID(&info->mti_body->fid1));
reqbody = req_capsule_client_get(info->mti_pill, &RMF_MDT_BODY);
if (reqbody == NULL)
RETURN(err_serious(-EFAULT));
rc = mdt_init_ucred(info, reqbody);
if (rc)
RETURN(err_serious(rc));
next = mdt_object_child(info->mti_object);
if (info->mti_body->valid & OBD_MD_FLRMTRGETFACL) {
if (unlikely(!remote))
GOTO(out, rc = err_serious(-EINVAL));
perm = mdt_identity_get_perm(uc->uc_identity, remote,
req->rq_peer.nid);
if (!(perm & CFS_RMTACL_PERM))
GOTO(out, rc = err_serious(-EPERM));
rc = mo_permission(info->mti_env, NULL, next, NULL,
MAY_RGETFACL);
if (rc)
GOTO(out, rc = err_serious(rc));
}
easize = mdt_getxattr_pack_reply(info);
if (easize < 0)
GOTO(out, rc = err_serious(easize));
repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
LASSERT(repbody != NULL);
/* No need further getxattr. */
if (easize == 0 || reqbody->eadatasize == 0)
GOTO(out, rc = easize);
buf = &info->mti_buf;
buf->lb_buf = req_capsule_server_get(info->mti_pill, &RMF_EADATA);
buf->lb_len = easize;
valid = info->mti_body->valid & (OBD_MD_FLXATTR | OBD_MD_FLXATTRLS);
if (valid == OBD_MD_FLXATTR) {
char *xattr_name = req_capsule_client_get(info->mti_pill,
&RMF_NAME);
rc = mdt_getxattr_one(info, xattr_name, next, buf, med, uc);
} else if (valid == OBD_MD_FLXATTRLS) {
CDEBUG(D_INODE, "listxattr\n");
rc = mo_xattr_list(info->mti_env, next, buf);
if (rc < 0)
CDEBUG(D_INFO, "listxattr failed: %d\n", rc);
} else if (valid == OBD_MD_FLXATTRALL) {
rc = mdt_getxattr_all(info, reqbody, repbody,
buf, next);
} else
LBUG();
EXIT;
out:
if (rc >= 0) {
mdt_counter_incr(req, LPROC_MDT_GETXATTR);
repbody->eadatasize = rc;
rc = 0;
}
mdt_exit_ucred(info);
return rc;
}
int mdt_getxattr(struct mdt_thread_info *info)
{
struct ptlrpc_request *req = mdt_info_req(info);
struct mdt_body *reqbody;
struct mdt_body *repbody = NULL;
struct md_object *next;
struct lu_buf *buf;
int easize, rc;
u64 valid;
ENTRY;
LASSERT(info->mti_object != NULL);
LASSERT(lu_object_assert_exists(&info->mti_object->mot_obj));
CDEBUG(D_INODE, "getxattr "DFID"\n", PFID(&info->mti_body->mbo_fid1));
rc = req_check_sepol(info->mti_pill);
if (rc)
RETURN(err_serious(rc));
reqbody = req_capsule_client_get(info->mti_pill, &RMF_MDT_BODY);
if (reqbody == NULL)
RETURN(err_serious(-EFAULT));
rc = mdt_init_ucred(info, reqbody);
if (rc)
RETURN(err_serious(rc));
next = mdt_object_child(info->mti_object);
easize = mdt_getxattr_pack_reply(info);
if (easize == -ENODATA)
GOTO(out, rc = easize);
else if (easize < 0)
GOTO(out, rc = err_serious(easize));
repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
LASSERT(repbody != NULL);
/* No need further getxattr. */
if (easize == 0 || reqbody->mbo_eadatasize == 0)
GOTO(out, rc = easize);
buf = &info->mti_buf;
buf->lb_buf = req_capsule_server_get(info->mti_pill, &RMF_EADATA);
buf->lb_len = easize;
valid = info->mti_body->mbo_valid & (OBD_MD_FLXATTR | OBD_MD_FLXATTRLS);
if (valid == OBD_MD_FLXATTR) {
const char *xattr_name = req_capsule_client_get(info->mti_pill,
&RMF_NAME);
rc = mo_xattr_get(info->mti_env, next, buf, xattr_name);
if (rc < 0)
GOTO(out, rc);
rc = mdt_nodemap_map_acl(info, buf->lb_buf, rc, xattr_name,
NODEMAP_FS_TO_CLIENT);
} else if (valid == OBD_MD_FLXATTRLS) {
CDEBUG(D_INODE, "listxattr\n");
rc = mo_xattr_list(info->mti_env, next, buf);
if (rc < 0)
CDEBUG(D_INFO, "listxattr failed: %d\n", rc);
} else if (valid == OBD_MD_FLXATTRALL) {
rc = mdt_getxattr_all(info, reqbody, repbody,
buf, next);
} else
LBUG();
EXIT;
out:
if (rc >= 0) {
mdt_counter_incr(req, LPROC_MDT_GETXATTR);
/* LU-11109: Set OBD_MD_FLXATTR on success so that
* newer clients can distinguish between nonexistent
* xattrs and zero length values. */
repbody->mbo_valid |= OBD_MD_FLXATTR;
repbody->mbo_eadatasize = rc;
rc = 0;
}
mdt_exit_ucred(info);
return rc;
}
