Ejemplo n.º 1
0
static int mdt_rename_unpack(struct mdt_thread_info *info)
{
	struct lu_ucred         *uc = mdt_ucred(info);
        struct mdt_rec_rename   *rec;
        struct md_attr          *ma = &info->mti_attr;
        struct lu_attr          *attr = &info->mti_attr.ma_attr;
        struct mdt_reint_record *rr = &info->mti_rr;
        struct req_capsule      *pill = info->mti_pill;
        int rc;
        ENTRY;

        CLASSERT(sizeof(struct mdt_rec_rename) == sizeof(struct mdt_rec_reint));
        rec = req_capsule_client_get(pill, &RMF_REC_REINT);
        if (rec == NULL)
                RETURN(-EFAULT);

	/* This prior initialization is needed for old_init_ucred_reint() */
	uc->uc_fsuid = rec->rn_fsuid;
	uc->uc_fsgid = rec->rn_fsgid;
	uc->uc_cap   = rec->rn_cap;
	uc->uc_suppgids[0] = rec->rn_suppgid1;
	uc->uc_suppgids[1] = rec->rn_suppgid2;

        attr->la_uid = rec->rn_fsuid;
        attr->la_gid = rec->rn_fsgid;
        rr->rr_fid1 = &rec->rn_fid1;
        rr->rr_fid2 = &rec->rn_fid2;
        attr->la_ctime = rec->rn_time;
        attr->la_mtime = rec->rn_time;
        /* rename_tgt contains the mode already */
        attr->la_mode = rec->rn_mode;
        attr->la_valid = LA_UID | LA_GID | LA_CTIME | LA_MTIME | LA_MODE;

        if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
                mdt_set_capainfo(info, 0, rr->rr_fid1,
                                 req_capsule_client_get(pill, &RMF_CAPA1));
        if (req_capsule_get_size(pill, &RMF_CAPA2, RCL_CLIENT))
                mdt_set_capainfo(info, 1, rr->rr_fid2,
                                 req_capsule_client_get(pill, &RMF_CAPA2));

	rc = mdt_name_unpack(pill, &RMF_NAME, &rr->rr_name, 0);
	if (rc < 0)
		RETURN(rc);

	rc = mdt_name_unpack(pill, &RMF_SYMTGT, &rr->rr_tgt_name, 0);
	if (rc < 0)
		RETURN(rc);

        if (rec->rn_bias & MDS_VTX_BYPASS)
                ma->ma_attr_flags |= MDS_VTX_BYPASS;
        else
                ma->ma_attr_flags &= ~MDS_VTX_BYPASS;

        info->mti_spec.no_create = !!req_is_replay(mdt_info_req(info));


	rc = mdt_dlmreq_unpack(info);

	RETURN(rc);
}
Ejemplo n.º 2
0
Archivo: mdt_lib.c Proyecto: hpc/lustre
static int mdt_rename_unpack(struct mdt_thread_info *info)
{
        struct md_ucred         *uc = mdt_ucred(info);
        struct mdt_rec_rename   *rec;
        struct md_attr          *ma = &info->mti_attr;
        struct lu_attr          *attr = &info->mti_attr.ma_attr;
        struct mdt_reint_record *rr = &info->mti_rr;
        struct req_capsule      *pill = info->mti_pill;
        int rc;
        ENTRY;

        CLASSERT(sizeof(struct mdt_rec_rename) == sizeof(struct mdt_rec_reint));
        rec = req_capsule_client_get(pill, &RMF_REC_REINT);
        if (rec == NULL)
                RETURN(-EFAULT);

        uc->mu_fsuid = rec->rn_fsuid;
        uc->mu_fsgid = rec->rn_fsgid;
        uc->mu_cap   = rec->rn_cap;
        uc->mu_suppgids[0] = rec->rn_suppgid1;
        uc->mu_suppgids[1] = rec->rn_suppgid2;

        attr->la_uid = rec->rn_fsuid;
        attr->la_gid = rec->rn_fsgid;
        rr->rr_fid1 = &rec->rn_fid1;
        rr->rr_fid2 = &rec->rn_fid2;
        attr->la_ctime = rec->rn_time;
        attr->la_mtime = rec->rn_time;
        /* rename_tgt contains the mode already */
        attr->la_mode = rec->rn_mode;
        attr->la_valid = LA_UID | LA_GID | LA_CTIME | LA_MTIME | LA_MODE;

        if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
                mdt_set_capainfo(info, 0, rr->rr_fid1,
                                 req_capsule_client_get(pill, &RMF_CAPA1));
        if (req_capsule_get_size(pill, &RMF_CAPA2, RCL_CLIENT))
                mdt_set_capainfo(info, 1, rr->rr_fid2,
                                 req_capsule_client_get(pill, &RMF_CAPA2));

        info->mti_spec.sp_ck_split = !!(rec->rn_bias & MDS_CHECK_SPLIT);
        info->mti_cross_ref = !!(rec->rn_bias & MDS_CROSS_REF);
        rr->rr_name = req_capsule_client_get(pill, &RMF_NAME);
        rr->rr_tgt = req_capsule_client_get(pill, &RMF_SYMTGT);
        if (rr->rr_name == NULL || rr->rr_tgt == NULL)
                RETURN(-EFAULT);
        rr->rr_namelen = req_capsule_get_size(pill, &RMF_NAME, RCL_CLIENT) - 1;
        rr->rr_tgtlen = req_capsule_get_size(pill, &RMF_SYMTGT, RCL_CLIENT) - 1;
        if (!info->mti_cross_ref)
                LASSERT(rr->rr_namelen > 0 && rr->rr_tgtlen > 0);
        if (rec->rn_bias & MDS_VTX_BYPASS)
                ma->ma_attr_flags |= MDS_VTX_BYPASS;
        else
                ma->ma_attr_flags &= ~MDS_VTX_BYPASS;

        info->mti_spec.no_create = !!req_is_replay(mdt_info_req(info));

        rc = mdt_dlmreq_unpack(info);
        RETURN(rc);
}
Ejemplo n.º 3
0
Archivo: mdt_lib.c Proyecto: hpc/lustre
static int mdt_setxattr_unpack(struct mdt_thread_info *info)
{
        struct mdt_reint_record   *rr   = &info->mti_rr;
        struct md_ucred           *uc   = mdt_ucred(info);
        struct lu_attr            *attr = &info->mti_attr.ma_attr;
        struct req_capsule        *pill = info->mti_pill;
        struct mdt_rec_setxattr   *rec;
        ENTRY;


        CLASSERT(sizeof(struct mdt_rec_setxattr) ==
                         sizeof(struct mdt_rec_reint));

        rec = req_capsule_client_get(pill, &RMF_REC_REINT);
        if (rec == NULL)
                RETURN(-EFAULT);

        uc->mu_fsuid  = rec->sx_fsuid;
        uc->mu_fsgid  = rec->sx_fsgid;
        uc->mu_cap    = rec->sx_cap;
        uc->mu_suppgids[0] = rec->sx_suppgid1;
        uc->mu_suppgids[1] = -1;

        rr->rr_opcode = rec->sx_opcode;
        rr->rr_fid1   = &rec->sx_fid;
        attr->la_valid = rec->sx_valid;
        attr->la_ctime = rec->sx_time;
        attr->la_size = rec->sx_size;
        attr->la_flags = rec->sx_flags;

        if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
                mdt_set_capainfo(info, 0, rr->rr_fid1,
                                 req_capsule_client_get(pill, &RMF_CAPA1));
        else
                mdt_set_capainfo(info, 0, rr->rr_fid1, BYPASS_CAPA);

        rr->rr_name = req_capsule_client_get(pill, &RMF_NAME);
        if (rr->rr_name == NULL)
                RETURN(-EFAULT);
        rr->rr_namelen = req_capsule_get_size(pill, &RMF_NAME, RCL_CLIENT) - 1;
        LASSERT(rr->rr_namelen > 0);

        rr->rr_eadatalen = req_capsule_get_size(pill, &RMF_EADATA, RCL_CLIENT);
        if (rr->rr_eadatalen > 0) {
                rr->rr_eadata = req_capsule_client_get(pill, &RMF_EADATA);
                if (rr->rr_eadata == NULL)
                        RETURN(-EFAULT);
        }

        RETURN(0);
}
Ejemplo n.º 4
0
Archivo: mdt_lib.c Proyecto: hpc/lustre
static int mdt_link_unpack(struct mdt_thread_info *info)
{
        struct md_ucred         *uc  = mdt_ucred(info);
        struct mdt_rec_link     *rec;
        struct lu_attr          *attr = &info->mti_attr.ma_attr;
        struct mdt_reint_record *rr = &info->mti_rr;
        struct req_capsule      *pill = info->mti_pill;
        int rc;
        ENTRY;

        CLASSERT(sizeof(struct mdt_rec_link) == sizeof(struct mdt_rec_reint));
        rec = req_capsule_client_get(pill, &RMF_REC_REINT);
        if (rec == NULL)
                RETURN(-EFAULT);

        uc->mu_fsuid = rec->lk_fsuid;
        uc->mu_fsgid = rec->lk_fsgid;
        uc->mu_cap   = rec->lk_cap;
        uc->mu_suppgids[0] = rec->lk_suppgid1;
        uc->mu_suppgids[1] = rec->lk_suppgid2;

        attr->la_uid = rec->lk_fsuid;
        attr->la_gid = rec->lk_fsgid;
        rr->rr_fid1 = &rec->lk_fid1;
        rr->rr_fid2 = &rec->lk_fid2;
        attr->la_ctime = rec->lk_time;
        attr->la_mtime = rec->lk_time;
        attr->la_valid = LA_UID | LA_GID | LA_CTIME | LA_MTIME;

        if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
                mdt_set_capainfo(info, 0, rr->rr_fid1,
                                 req_capsule_client_get(pill, &RMF_CAPA1));
        if (req_capsule_get_size(pill, &RMF_CAPA2, RCL_CLIENT))
                mdt_set_capainfo(info, 1, rr->rr_fid2,
                                 req_capsule_client_get(pill, &RMF_CAPA2));

        info->mti_spec.sp_ck_split = !!(rec->lk_bias & MDS_CHECK_SPLIT);
        info->mti_cross_ref = !!(rec->lk_bias & MDS_CROSS_REF);
        rr->rr_name = req_capsule_client_get(pill, &RMF_NAME);
        if (rr->rr_name == NULL)
                RETURN(-EFAULT);
        rr->rr_namelen = req_capsule_get_size(pill, &RMF_NAME, RCL_CLIENT) - 1;
        if (!info->mti_cross_ref)
                LASSERT(rr->rr_namelen > 0);

        rc = mdt_dlmreq_unpack(info);
        RETURN(rc);
}
Ejemplo n.º 5
0
static int mdt_setattr_unpack_rec(struct mdt_thread_info *info)
{
	struct lu_ucred         *uc  = mdt_ucred(info);
        struct md_attr          *ma = &info->mti_attr;
        struct lu_attr          *la = &ma->ma_attr;
        struct req_capsule      *pill = info->mti_pill;
        struct mdt_reint_record *rr = &info->mti_rr;
        struct mdt_rec_setattr  *rec;
        ENTRY;

        CLASSERT(sizeof(struct mdt_rec_setattr)== sizeof(struct mdt_rec_reint));
        rec = req_capsule_client_get(pill, &RMF_REC_REINT);
        if (rec == NULL)
                RETURN(-EFAULT);

	/* This prior initialization is needed for old_init_ucred_reint() */
	uc->uc_fsuid = rec->sa_fsuid;
	uc->uc_fsgid = rec->sa_fsgid;
	uc->uc_cap   = rec->sa_cap;
	uc->uc_suppgids[0] = rec->sa_suppgid;
	uc->uc_suppgids[1] = -1;

        rr->rr_fid1 = &rec->sa_fid;
	la->la_valid = mdt_attr_valid_xlate(rec->sa_valid, rr, ma);
	/*  If MDS_ATTR_xTIME is set without MDS_ATTR_xTIME_SET and
	 *  the client does not have OBD_CONNECT_FULL20, convert it
	 *  to LA_xTIME. LU-3036 */
	if (!(exp_connect_flags(info->mti_exp) & OBD_CONNECT_FULL20)) {
		if (!(rec->sa_valid & MDS_ATTR_ATIME_SET) &&
		     (rec->sa_valid & MDS_ATTR_ATIME))
			la->la_valid |= LA_ATIME;
		if (!(rec->sa_valid & MDS_ATTR_MTIME_SET) &&
		     (rec->sa_valid & MDS_ATTR_MTIME))
			la->la_valid |= LA_MTIME;
		if (!(rec->sa_valid & MDS_ATTR_CTIME_SET) &&
		     (rec->sa_valid & MDS_ATTR_CTIME))
			la->la_valid |= LA_CTIME;
	}
        la->la_mode  = rec->sa_mode;
        la->la_flags = rec->sa_attr_flags;
        la->la_uid   = rec->sa_uid;
        la->la_gid   = rec->sa_gid;
        la->la_size  = rec->sa_size;
        la->la_blocks = rec->sa_blocks;
        la->la_ctime = rec->sa_ctime;
        la->la_atime = rec->sa_atime;
        la->la_mtime = rec->sa_mtime;
        ma->ma_valid = MA_INODE;

	if (rec->sa_bias & MDS_DATA_MODIFIED)
		ma->ma_attr_flags |= MDS_DATA_MODIFIED;
	else
		ma->ma_attr_flags &= ~MDS_DATA_MODIFIED;

        if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
                mdt_set_capainfo(info, 0, rr->rr_fid1,
                                 req_capsule_client_get(pill, &RMF_CAPA1));

        RETURN(0);
}
Ejemplo n.º 6
0
static int mdt_link_unpack(struct mdt_thread_info *info)
{
	struct lu_ucred         *uc  = mdt_ucred(info);
        struct mdt_rec_link     *rec;
        struct lu_attr          *attr = &info->mti_attr.ma_attr;
        struct mdt_reint_record *rr = &info->mti_rr;
        struct req_capsule      *pill = info->mti_pill;
        int rc;
        ENTRY;

        CLASSERT(sizeof(struct mdt_rec_link) == sizeof(struct mdt_rec_reint));
        rec = req_capsule_client_get(pill, &RMF_REC_REINT);
        if (rec == NULL)
                RETURN(-EFAULT);

	/* This prior initialization is needed for old_init_ucred_reint() */
	uc->uc_fsuid = rec->lk_fsuid;
	uc->uc_fsgid = rec->lk_fsgid;
	uc->uc_cap   = rec->lk_cap;
	uc->uc_suppgids[0] = rec->lk_suppgid1;
	uc->uc_suppgids[1] = rec->lk_suppgid2;

        attr->la_uid = rec->lk_fsuid;
        attr->la_gid = rec->lk_fsgid;
        rr->rr_fid1 = &rec->lk_fid1;
        rr->rr_fid2 = &rec->lk_fid2;
        attr->la_ctime = rec->lk_time;
        attr->la_mtime = rec->lk_time;
        attr->la_valid = LA_UID | LA_GID | LA_CTIME | LA_MTIME;

        if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
                mdt_set_capainfo(info, 0, rr->rr_fid1,
                                 req_capsule_client_get(pill, &RMF_CAPA1));
        if (req_capsule_get_size(pill, &RMF_CAPA2, RCL_CLIENT))
                mdt_set_capainfo(info, 1, rr->rr_fid2,
                                 req_capsule_client_get(pill, &RMF_CAPA2));

        rr->rr_name = req_capsule_client_get(pill, &RMF_NAME);
        if (rr->rr_name == NULL)
                RETURN(-EFAULT);
        rr->rr_namelen = req_capsule_get_size(pill, &RMF_NAME, RCL_CLIENT) - 1;

	LASSERT(rr->rr_namelen > 0);

        rc = mdt_dlmreq_unpack(info);
        RETURN(rc);
}
Ejemplo n.º 7
0
Archivo: mdt_lib.c Proyecto: hpc/lustre
static int mdt_setattr_unpack_rec(struct mdt_thread_info *info)
{
        struct md_ucred         *uc  = mdt_ucred(info);
        struct md_attr          *ma = &info->mti_attr;
        struct lu_attr          *la = &ma->ma_attr;
        struct req_capsule      *pill = info->mti_pill;
        struct mdt_reint_record *rr = &info->mti_rr;
        struct mdt_rec_setattr  *rec;
        ENTRY;

        CLASSERT(sizeof(struct mdt_rec_setattr)== sizeof(struct mdt_rec_reint));
        rec = req_capsule_client_get(pill, &RMF_REC_REINT);
        if (rec == NULL)
                RETURN(-EFAULT);

        uc->mu_fsuid = rec->sa_fsuid;
        uc->mu_fsgid = rec->sa_fsgid;
        uc->mu_cap   = rec->sa_cap;
        uc->mu_suppgids[0] = rec->sa_suppgid;
        uc->mu_suppgids[1] = -1;

        rr->rr_fid1 = &rec->sa_fid;
        la->la_valid = mdt_attr_valid_xlate(attr_unpack(rec->sa_valid), rr, ma);
        la->la_mode  = rec->sa_mode;
        la->la_flags = rec->sa_attr_flags;
        la->la_uid   = rec->sa_uid;
        la->la_gid   = rec->sa_gid;
        la->la_size  = rec->sa_size;
        la->la_blocks = rec->sa_blocks;
        la->la_ctime = rec->sa_ctime;
        la->la_atime = rec->sa_atime;
        la->la_mtime = rec->sa_mtime;
        ma->ma_valid = MA_INODE;

        if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
                mdt_set_capainfo(info, 0, rr->rr_fid1,
                                 req_capsule_client_get(pill, &RMF_CAPA1));

        RETURN(0);
}
Ejemplo n.º 8
0
/*
 * VBR: save parent version in reply and child version getting by its name.
 * Version of child is getting and checking during its lookup. If
 */
static int mdt_reint_unlink(struct mdt_thread_info *info,
                            struct mdt_lock_handle *lhc)
{
        struct mdt_reint_record *rr = &info->mti_rr;
        struct ptlrpc_request   *req = mdt_info_req(info);
        struct md_attr          *ma = &info->mti_attr;
        struct lu_fid           *child_fid = &info->mti_tmp_fid1;
        struct mdt_object       *mp;
        struct mdt_object       *mc;
        struct mdt_lock_handle  *parent_lh;
        struct mdt_lock_handle  *child_lh;
        struct lu_name          *lname;
        int                      rc;
        ENTRY;

        DEBUG_REQ(D_INODE, req, "unlink "DFID"/%s", PFID(rr->rr_fid1),
                  rr->rr_name);

        if (info->mti_dlm_req)
                ldlm_request_cancel(req, info->mti_dlm_req, 0);

        if (OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_UNLINK))
                RETURN(err_serious(-ENOENT));

        /*
         * step 1: lock the parent. Note, this may be child in case of
         * remote operation denoted by ->mti_cross_ref flag.
         */
        parent_lh = &info->mti_lh[MDT_LH_PARENT];
        if (info->mti_cross_ref) {
                /*
                 * Init reg lock for cross ref case when we need to do only
                 * ref del locally.
                 */
                mdt_lock_reg_init(parent_lh, LCK_PW);
        } else {
                mdt_lock_pdo_init(parent_lh, LCK_PW, rr->rr_name,
                                  rr->rr_namelen);
        }
        mp = mdt_object_find_lock(info, rr->rr_fid1, parent_lh,
                                  MDS_INODELOCK_UPDATE, MDT_OBJ_MUST_EXIST);
        if (IS_ERR(mp)) {
                rc = PTR_ERR(mp);
                /* errors are possible here in cross-ref cases, see below */
                if (info->mti_cross_ref)
                        rc = 0;
                GOTO(out, rc);
        }

        rc = mdt_version_get_check_save(info, mp, 0);
        if (rc)
                GOTO(out_unlock_parent, rc);

        mdt_reint_init_ma(info, ma);
        if (!ma->ma_lmm || !ma->ma_cookie)
                GOTO(out_unlock_parent, rc = -EINVAL);

        if (info->mti_cross_ref) {
                /*
                 * Remote partial operation. It is possible that replay may
                 * happen on parent MDT and this operation will be repeated.
                 * Therefore the object absense is allowed case and nothing
                 * should be done here.
                 */
                if (mdt_object_exists(mp) > 0) {
                        mdt_set_capainfo(info, 0, rr->rr_fid1, BYPASS_CAPA);
                        rc = mo_ref_del(info->mti_env,
                                        mdt_object_child(mp), ma);
                        if (rc == 0)
                                mdt_handle_last_unlink(info, mp, ma);
                } else
                        rc = 0;
                GOTO(out_unlock_parent, rc);
        }

        /* step 2: find & lock the child */
        lname = mdt_name(info->mti_env, (char *)rr->rr_name, rr->rr_namelen);
        /* lookup child object along with version checking */
        rc = mdt_lookup_version_check(info, mp, lname, child_fid, 1);
        if (rc != 0)
                 GOTO(out_unlock_parent, rc);

        /* We will lock the child regardless it is local or remote. No harm. */
        mc = mdt_object_find(info->mti_env, info->mti_mdt, child_fid,
                             MDT_OBJ_MUST_EXIST);
        if (IS_ERR(mc))
                GOTO(out_unlock_parent, rc = PTR_ERR(mc));
        child_lh = &info->mti_lh[MDT_LH_CHILD];
        mdt_lock_reg_init(child_lh, LCK_EX);
        rc = mdt_object_lock(info, mc, child_lh, MDS_INODELOCK_FULL,
                             MDT_CROSS_LOCK);
        if (rc != 0) {
                mdt_object_put(info->mti_env, mc);
                GOTO(out_unlock_parent, rc);
        }

        mdt_fail_write(info->mti_env, info->mti_mdt->mdt_bottom,
                       OBD_FAIL_MDS_REINT_UNLINK_WRITE);
        /* save version when object is locked */
        mdt_version_get_save(info, mc, 1);
        /*
         * Now we can only make sure we need MA_INODE, in mdd layer, will check
         * whether need MA_LOV and MA_COOKIE.
         */
        ma->ma_need = MA_INODE;
        ma->ma_valid = 0;
        mdt_set_capainfo(info, 1, child_fid, BYPASS_CAPA);
        rc = mdo_unlink(info->mti_env, mdt_object_child(mp),
                        mdt_object_child(mc), lname, ma);
        if (rc == 0)
                mdt_handle_last_unlink(info, mc, ma);

        if (ma->ma_valid & MA_INODE) {
                switch (ma->ma_attr.la_mode & S_IFMT) {
                case S_IFDIR:
                        mdt_counter_incr(req->rq_export, LPROC_MDT_RMDIR);
                        break;
                case S_IFREG:
                case S_IFLNK:
                case S_IFCHR:
                case S_IFBLK:
                case S_IFIFO:
                case S_IFSOCK:
                        mdt_counter_incr(req->rq_export, LPROC_MDT_UNLINK);
                        break;
                default:
                        LASSERTF(0, "bad file type %o unlinking\n",
                                 ma->ma_attr.la_mode);
                }
        }

        EXIT;

        mdt_object_unlock_put(info, mc, child_lh, rc);
out_unlock_parent:
        mdt_object_unlock_put(info, mp, parent_lh, rc);
out:
        return rc;
}
Ejemplo n.º 9
0
Archivo: mdt_lib.c Proyecto: hpc/lustre
static int mdt_create_unpack(struct mdt_thread_info *info)
{
        struct md_ucred         *uc  = mdt_ucred(info);
        struct mdt_rec_create   *rec;
        struct lu_attr          *attr = &info->mti_attr.ma_attr;
        struct mdt_reint_record *rr = &info->mti_rr;
        struct req_capsule      *pill = info->mti_pill;
        struct md_op_spec       *sp = &info->mti_spec;
        int rc;
        ENTRY;

        CLASSERT(sizeof(struct mdt_rec_create) == sizeof(struct mdt_rec_reint));
        rec = req_capsule_client_get(pill, &RMF_REC_REINT);
        if (rec == NULL)
                RETURN(-EFAULT);

        uc->mu_fsuid = rec->cr_fsuid;
        uc->mu_fsgid = rec->cr_fsgid;
        uc->mu_cap   = rec->cr_cap;
        uc->mu_suppgids[0] = rec->cr_suppgid1;
        uc->mu_suppgids[1] = -1;

        rr->rr_fid1 = &rec->cr_fid1;
        rr->rr_fid2 = &rec->cr_fid2;
        attr->la_mode = rec->cr_mode;
        attr->la_rdev  = rec->cr_rdev;
        attr->la_uid   = rec->cr_fsuid;
        attr->la_gid   = rec->cr_fsgid;
        attr->la_ctime = rec->cr_time;
        attr->la_mtime = rec->cr_time;
        attr->la_atime = rec->cr_time;
        attr->la_valid = LA_MODE | LA_RDEV | LA_UID | LA_GID |
                         LA_CTIME | LA_MTIME | LA_ATIME;
        memset(&sp->u, 0, sizeof(sp->u));
        sp->sp_cr_flags = get_mrc_cr_flags(rec);
        sp->sp_ck_split = !!(rec->cr_bias & MDS_CHECK_SPLIT);
        info->mti_cross_ref = !!(rec->cr_bias & MDS_CROSS_REF);

        if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
                mdt_set_capainfo(info, 0, rr->rr_fid1,
                                 req_capsule_client_get(pill, &RMF_CAPA1));
        mdt_set_capainfo(info, 1, rr->rr_fid2, BYPASS_CAPA);

        if (!info->mti_cross_ref) {
                rr->rr_name = req_capsule_client_get(pill, &RMF_NAME);
                rr->rr_namelen = req_capsule_get_size(pill, &RMF_NAME,
                                                      RCL_CLIENT) - 1;
                LASSERT(rr->rr_name && rr->rr_namelen > 0);
        } else {
                rr->rr_name = NULL;
                rr->rr_namelen = 0;
        }

#ifdef CONFIG_FS_POSIX_ACL
        if (sp->sp_cr_flags & MDS_CREATE_RMT_ACL) {
                if (S_ISDIR(attr->la_mode))
                        sp->u.sp_pfid = rr->rr_fid1;
                req_capsule_extend(pill, &RQF_MDS_REINT_CREATE_RMT_ACL);
                LASSERT(req_capsule_field_present(pill, &RMF_EADATA,
                                                  RCL_CLIENT));
                sp->u.sp_ea.eadata = req_capsule_client_get(pill, &RMF_EADATA);
                sp->u.sp_ea.eadatalen = req_capsule_get_size(pill, &RMF_EADATA,
                                                             RCL_CLIENT);
                sp->u.sp_ea.fid = rr->rr_fid1;
                RETURN(0);
        }
#endif
        if (S_ISDIR(attr->la_mode)) {
                /* pass parent fid for cross-ref cases */
                sp->u.sp_pfid = rr->rr_fid1;
                if (sp->sp_cr_flags & MDS_CREATE_SLAVE_OBJ) {
                        /* create salve object req, need
                         * unpack split ea here
                         */
                       req_capsule_extend(pill, &RQF_MDS_REINT_CREATE_SLAVE);
                       LASSERT(req_capsule_field_present(pill, &RMF_EADATA,
                                                         RCL_CLIENT));
                       sp->u.sp_ea.eadata = req_capsule_client_get(pill,
                                                                   &RMF_EADATA);
                       sp->u.sp_ea.eadatalen = req_capsule_get_size(pill,
                                                                    &RMF_EADATA,
                                                                    RCL_CLIENT);
                       sp->u.sp_ea.fid = rr->rr_fid1;
                       RETURN(0);
                }
                req_capsule_extend(pill, &RQF_MDS_REINT_CREATE_RMT_ACL);
        } else if (S_ISLNK(attr->la_mode)) {
                const char *tgt = NULL;

                req_capsule_extend(pill, &RQF_MDS_REINT_CREATE_SYM);
                if (req_capsule_get_size(pill, &RMF_SYMTGT, RCL_CLIENT)) {
                        tgt = req_capsule_client_get(pill, &RMF_SYMTGT);
                        sp->u.sp_symname = tgt;
                }
                if (tgt == NULL)
                        RETURN(-EFAULT);
        } else {
                req_capsule_extend(pill, &RQF_MDS_REINT_CREATE_RMT_ACL);
        }
        rc = mdt_dlmreq_unpack(info);
        RETURN(rc);
}
Ejemplo n.º 10
0
/* partial operation for rename */
static int mdt_reint_rename_tgt(struct mdt_thread_info *info)
{
        struct mdt_reint_record *rr = &info->mti_rr;
        struct ptlrpc_request   *req = mdt_info_req(info);
        struct md_attr          *ma = &info->mti_attr;
        struct mdt_object       *mtgtdir;
        struct mdt_object       *mtgt = NULL;
        struct mdt_lock_handle  *lh_tgtdir;
        struct mdt_lock_handle  *lh_tgt = NULL;
        struct lu_fid           *tgt_fid = &info->mti_tmp_fid1;
        struct lu_name          *lname;
        int                      rc;
        ENTRY;

        DEBUG_REQ(D_INODE, req, "rename_tgt: insert (%s->"DFID") in "DFID,
                  rr->rr_tgt, PFID(rr->rr_fid2), PFID(rr->rr_fid1));

        /* step 1: lookup & lock the tgt dir. */
        lh_tgtdir = &info->mti_lh[MDT_LH_PARENT];
        mdt_lock_pdo_init(lh_tgtdir, LCK_PW, rr->rr_tgt,
                          rr->rr_tgtlen);
        mtgtdir = mdt_object_find_lock(info, rr->rr_fid1, lh_tgtdir,
                                       MDS_INODELOCK_UPDATE,
                                       MDT_OBJ_MUST_EXIST);
        if (IS_ERR(mtgtdir))
                RETURN(PTR_ERR(mtgtdir));

        /* step 2: find & lock the target object if exists. */
        mdt_set_capainfo(info, 0, rr->rr_fid1, BYPASS_CAPA);
        lname = mdt_name(info->mti_env, (char *)rr->rr_tgt, rr->rr_tgtlen);
        rc = mdo_lookup(info->mti_env, mdt_object_child(mtgtdir),
                        lname, tgt_fid, &info->mti_spec);
        if (rc != 0 && rc != -ENOENT) {
                GOTO(out_unlock_tgtdir, rc);
        } else if (rc == 0) {
                /*
                 * In case of replay that name can be already inserted, check
                 * that and do nothing if so.
                 */
                if (lu_fid_eq(tgt_fid, rr->rr_fid2))
                        GOTO(out_unlock_tgtdir, rc);

                lh_tgt = &info->mti_lh[MDT_LH_CHILD];
                mdt_lock_reg_init(lh_tgt, LCK_EX);

                mtgt = mdt_object_find_lock(info, tgt_fid, lh_tgt,
                                            MDS_INODELOCK_LOOKUP,
                                            MDT_OBJ_MUST_EXIST);
                if (IS_ERR(mtgt))
                        GOTO(out_unlock_tgtdir, rc = PTR_ERR(mtgt));

                mdt_reint_init_ma(info, ma);
                if (!ma->ma_lmm || !ma->ma_cookie)
                        GOTO(out_unlock_tgt, rc = -EINVAL);

                rc = mdo_rename_tgt(info->mti_env, mdt_object_child(mtgtdir),
                                    mdt_object_child(mtgt), rr->rr_fid2,
                                    lname, ma);
        } else /* -ENOENT */ {
                rc = mdo_name_insert(info->mti_env, mdt_object_child(mtgtdir),
                                     lname, rr->rr_fid2, ma);
        }

        /* handle last link of tgt object */
        if (rc == 0 && mtgt)
                mdt_handle_last_unlink(info, mtgt, ma);

        EXIT;
out_unlock_tgt:
        if (mtgt)
                mdt_object_unlock_put(info, mtgt, lh_tgt, rc);
out_unlock_tgtdir:
        mdt_object_unlock_put(info, mtgtdir, lh_tgtdir, rc);
        return rc;
}
Ejemplo n.º 11
0
Archivo: mdt_lib.c Proyecto: hpc/lustre
static int mdt_open_unpack(struct mdt_thread_info *info)
{
        struct md_ucred         *uc = mdt_ucred(info);
        struct mdt_rec_create   *rec;
        struct lu_attr          *attr = &info->mti_attr.ma_attr;
        struct req_capsule      *pill = info->mti_pill;
        struct mdt_reint_record *rr   = &info->mti_rr;
        struct ptlrpc_request   *req  = mdt_info_req(info);
        struct md_op_spec       *sp   = &info->mti_spec;
        ENTRY;

        CLASSERT(sizeof(struct mdt_rec_create) == sizeof(struct mdt_rec_reint));
        rec = req_capsule_client_get(pill, &RMF_REC_REINT);
        if (rec == NULL)
                RETURN(-EFAULT);

        uc->mu_fsuid = rec->cr_fsuid;
        uc->mu_fsgid = rec->cr_fsgid;
        uc->mu_cap   = rec->cr_cap;
        uc->mu_suppgids[0] = rec->cr_suppgid1;
        uc->mu_suppgids[1] = rec->cr_suppgid2;

        rr->rr_fid1   = &rec->cr_fid1;
        rr->rr_fid2   = &rec->cr_fid2;
        rr->rr_handle = &rec->cr_old_handle;
        attr->la_mode = rec->cr_mode;
        attr->la_rdev  = rec->cr_rdev;
        attr->la_uid   = rec->cr_fsuid;
        attr->la_gid   = rec->cr_fsgid;
        attr->la_ctime = rec->cr_time;
        attr->la_mtime = rec->cr_time;
        attr->la_atime = rec->cr_time;
        attr->la_valid = LA_MODE  | LA_RDEV  | LA_UID   | LA_GID |
                         LA_CTIME | LA_MTIME | LA_ATIME;
        memset(&info->mti_spec.u, 0, sizeof(info->mti_spec.u));
        info->mti_spec.sp_cr_flags = get_mrc_cr_flags(rec);
        /* Do not trigger ASSERTION if client miss to set such flags. */
        if (unlikely(info->mti_spec.sp_cr_flags == 0))
                RETURN(-EPROTO);
        info->mti_replayepoch = rec->cr_ioepoch;

        info->mti_spec.sp_ck_split = !!(rec->cr_bias & MDS_CHECK_SPLIT);
        info->mti_cross_ref = !!(rec->cr_bias & MDS_CROSS_REF);

        if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
                mdt_set_capainfo(info, 0, rr->rr_fid1,
                                 req_capsule_client_get(pill, &RMF_CAPA1));
        if (req_is_replay(req) &&
            req_capsule_get_size(pill, &RMF_CAPA2, RCL_CLIENT)) {
#if 0
                mdt_set_capainfo(info, 1, rr->rr_fid2,
                                 req_capsule_client_get(pill, &RMF_CAPA2));
#else
                /*
                 * FIXME: capa in replay open request might have expired,
                 * bypass capa check. Security hole?
                 */
                mdt_set_capainfo(info, 0, rr->rr_fid1, BYPASS_CAPA);
                mdt_set_capainfo(info, 1, rr->rr_fid2, BYPASS_CAPA);
#endif
        }

        rr->rr_name = req_capsule_client_get(pill, &RMF_NAME);
        if (rr->rr_name == NULL)
                RETURN(-EFAULT);
        rr->rr_namelen = req_capsule_get_size(pill, &RMF_NAME, RCL_CLIENT) - 1;

        sp->u.sp_ea.eadatalen = req_capsule_get_size(pill, &RMF_EADATA,
                                                     RCL_CLIENT);
        if (sp->u.sp_ea.eadatalen) {
                sp->u.sp_ea.eadata = req_capsule_client_get(pill, &RMF_EADATA);
                sp->no_create = !!req_is_replay(req);
        }

        RETURN(0);
}
Ejemplo n.º 12
0
/*
 * VBR: save parent version in reply and child version getting by its name.
 * Version of child is getting and checking during its lookup. If
 */
static int mdt_reint_unlink(struct mdt_thread_info *info,
                            struct mdt_lock_handle *lhc)
{
        struct mdt_reint_record *rr = &info->mti_rr;
        struct ptlrpc_request   *req = mdt_info_req(info);
        struct md_attr          *ma = &info->mti_attr;
        struct lu_fid           *child_fid = &info->mti_tmp_fid1;
        struct mdt_object       *mp;
        struct mdt_object       *mc;
        struct mdt_lock_handle  *parent_lh;
        struct mdt_lock_handle  *child_lh;
        struct lu_name          *lname;
        int                      rc;
	int			 no_name = 0;
	ENTRY;

        DEBUG_REQ(D_INODE, req, "unlink "DFID"/%s", PFID(rr->rr_fid1),
                  rr->rr_name);

        if (info->mti_dlm_req)
                ldlm_request_cancel(req, info->mti_dlm_req, 0);

        if (OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_UNLINK))
                RETURN(err_serious(-ENOENT));

	if (fid_is_obf(rr->rr_fid1) || fid_is_dot_lustre(rr->rr_fid1))
		RETURN(-EPERM);
        /*
	 * step 1: Found the parent.
         */
	mp = mdt_object_find(info->mti_env, info->mti_mdt, rr->rr_fid1);
	if (IS_ERR(mp)) {
		rc = PTR_ERR(mp);
		GOTO(out, rc);
	}

	parent_lh = &info->mti_lh[MDT_LH_PARENT];
	lname = mdt_name(info->mti_env, (char *)rr->rr_name, rr->rr_namelen);
	if (mdt_object_remote(mp)) {
		mdt_lock_reg_init(parent_lh, LCK_EX);
		rc = mdt_remote_object_lock(info, mp, &parent_lh->mlh_rreg_lh,
					    parent_lh->mlh_rreg_mode,
					    MDS_INODELOCK_UPDATE);
		if (rc != ELDLM_OK)
			GOTO(put_parent, rc);

	} else {
		mdt_lock_pdo_init(parent_lh, LCK_PW, rr->rr_name,
				  rr->rr_namelen);
		rc = mdt_object_lock(info, mp, parent_lh, MDS_INODELOCK_UPDATE,
				     MDT_LOCAL_LOCK);
		if (rc)
			GOTO(put_parent, rc);

		rc = mdt_version_get_check_save(info, mp, 0);
		if (rc)
			GOTO(unlock_parent, rc);
	}

	/* step 2: find & lock the child */
	/* lookup child object along with version checking */
	fid_zero(child_fid);
	rc = mdt_lookup_version_check(info, mp, lname, child_fid, 1);
	if (rc != 0) {
		/* Name might not be able to find during resend of
		 * remote unlink, considering following case.
		 * dir_A is a remote directory, the name entry of
		 * dir_A is on MDT0, the directory is on MDT1,
		 *
		 * 1. client sends unlink req to MDT1.
		 * 2. MDT1 sends name delete update to MDT0.
		 * 3. name entry is being deleted in MDT0 synchronously.
		 * 4. MDT1 is restarted.
		 * 5. client resends unlink req to MDT1. So it can not
		 *    find the name entry on MDT0 anymore.
		 * In this case, MDT1 only needs to destory the local
		 * directory.
		 * */
		if (mdt_object_remote(mp) && rc == -ENOENT &&
		    !fid_is_zero(rr->rr_fid2) &&
		    lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT) {
			no_name = 1;
			*child_fid = *rr->rr_fid2;
		 } else {
			GOTO(unlock_parent, rc);
		 }
	}

	if (fid_is_obf(child_fid) || fid_is_dot_lustre(child_fid))
		GOTO(unlock_parent, rc = -EPERM);

        mdt_reint_init_ma(info, ma);

	/* We will lock the child regardless it is local or remote. No harm. */
	mc = mdt_object_find(info->mti_env, info->mti_mdt, child_fid);
	if (IS_ERR(mc))
		GOTO(unlock_parent, rc = PTR_ERR(mc));

        child_lh = &info->mti_lh[MDT_LH_CHILD];
        mdt_lock_reg_init(child_lh, LCK_EX);
	if (mdt_object_remote(mc)) {
		struct mdt_body	 *repbody;

		if (!fid_is_zero(rr->rr_fid2)) {
			CDEBUG(D_INFO, "%s: name %s can not find "DFID"\n",
			       mdt_obd_name(info->mti_mdt),
			       (char *)rr->rr_name, PFID(mdt_object_fid(mc)));
			GOTO(put_child, rc = -ENOENT);
		}
		CDEBUG(D_INFO, "%s: name %s: "DFID" is another MDT\n",
		       mdt_obd_name(info->mti_mdt),
		       (char *)rr->rr_name, PFID(mdt_object_fid(mc)));

		if (!mdt_is_dne_client(req->rq_export))
			/* Return -EIO for old client */
			GOTO(put_child, rc = -EIO);

		if (info->mti_spec.sp_rm_entry) {
			struct lu_ucred *uc  = mdt_ucred(info);

			if (!md_capable(uc, CFS_CAP_SYS_ADMIN)) {
				CERROR("%s: unlink remote entry is only "
				       "permitted for administrator: rc = %d\n",
					mdt_obd_name(info->mti_mdt),
					-EPERM);
				GOTO(put_child, rc = -EPERM);
			}

			ma->ma_need = MA_INODE;
			ma->ma_valid = 0;
			mdt_set_capainfo(info, 1, child_fid, BYPASS_CAPA);
			rc = mdo_unlink(info->mti_env, mdt_object_child(mp),
					NULL, lname, ma, no_name);
			GOTO(put_child, rc);
		}
		/* Revoke the LOOKUP lock of the remote object granted by
		 * this MDT. Since the unlink will happen on another MDT,
		 * it will release the LOOKUP lock right away. Then What
		 * would happen if another client try to grab the LOOKUP
		 * lock at the same time with unlink XXX */
		mdt_object_lock(info, mc, child_lh, MDS_INODELOCK_LOOKUP,
				MDT_CROSS_LOCK);
		repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
		LASSERT(repbody != NULL);
		repbody->fid1 = *mdt_object_fid(mc);
		repbody->valid |= (OBD_MD_FLID | OBD_MD_MDS);
		GOTO(unlock_child, rc = -EREMOTE);
	} else if (info->mti_spec.sp_rm_entry) {
		rc = -EPERM;
		CDEBUG(D_INFO, "%s: no rm_entry on local dir '%s': rc = %d\n",
		       mdt_obd_name(info->mti_mdt), (char *)rr->rr_name, rc);
		GOTO(put_child, rc);
	}

	/* We used to acquire MDS_INODELOCK_FULL here but we can't do
	 * this now because a running HSM restore on the child (unlink
	 * victim) will hold the layout lock. See LU-4002. */
	rc = mdt_object_lock(info, mc, child_lh,
			     MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE,
			     MDT_CROSS_LOCK);
	if (rc != 0)
		GOTO(put_child, rc);

        mdt_fail_write(info->mti_env, info->mti_mdt->mdt_bottom,
                       OBD_FAIL_MDS_REINT_UNLINK_WRITE);
        /* save version when object is locked */
        mdt_version_get_save(info, mc, 1);
	/*
	 * Now we can only make sure we need MA_INODE, in mdd layer, will check
	 * whether need MA_LOV and MA_COOKIE.
	 */
	ma->ma_need = MA_INODE;
	ma->ma_valid = 0;
	mdt_set_capainfo(info, 1, child_fid, BYPASS_CAPA);

	mutex_lock(&mc->mot_lov_mutex);

	rc = mdo_unlink(info->mti_env, mdt_object_child(mp),
			mdt_object_child(mc), lname, ma, no_name);

	mutex_unlock(&mc->mot_lov_mutex);

	if (rc == 0 && !lu_object_is_dying(&mc->mot_header))
		rc = mdt_attr_get_complex(info, mc, ma);
	if (rc == 0)
		mdt_handle_last_unlink(info, mc, ma);

        if (ma->ma_valid & MA_INODE) {
                switch (ma->ma_attr.la_mode & S_IFMT) {
                case S_IFDIR:
			mdt_counter_incr(req, LPROC_MDT_RMDIR);
                        break;
                case S_IFREG:
                case S_IFLNK:
                case S_IFCHR:
                case S_IFBLK:
                case S_IFIFO:
                case S_IFSOCK:
			mdt_counter_incr(req, LPROC_MDT_UNLINK);
                        break;
                default:
                        LASSERTF(0, "bad file type %o unlinking\n",
                                 ma->ma_attr.la_mode);
                }
        }

        EXIT;
unlock_child:
	mdt_object_unlock(info, mc, child_lh, rc);
put_child:
	mdt_object_put(info->mti_env, mc);
unlock_parent:
	mdt_object_unlock(info, mp, parent_lh, rc);
put_parent:
	mdt_object_put(info->mti_env, mp);
out:
        return rc;
}
Ejemplo n.º 13
0
static int mdt_setxattr_unpack(struct mdt_thread_info *info)
{
	struct mdt_reint_record	*rr	= &info->mti_rr;
	struct lu_ucred		*uc	= mdt_ucred(info);
	struct lu_attr		*attr	= &info->mti_attr.ma_attr;
	struct req_capsule	*pill	= info->mti_pill;
	struct mdt_rec_setxattr	*rec;
	int			 rc;
	ENTRY;


        CLASSERT(sizeof(struct mdt_rec_setxattr) ==
                         sizeof(struct mdt_rec_reint));

        rec = req_capsule_client_get(pill, &RMF_REC_REINT);
        if (rec == NULL)
                RETURN(-EFAULT);

	/* This prior initialization is needed for old_init_ucred_reint() */
	uc->uc_fsuid  = rec->sx_fsuid;
	uc->uc_fsgid  = rec->sx_fsgid;
	uc->uc_cap    = rec->sx_cap;
	uc->uc_suppgids[0] = rec->sx_suppgid1;
	uc->uc_suppgids[1] = -1;

        rr->rr_opcode = rec->sx_opcode;
        rr->rr_fid1   = &rec->sx_fid;
        attr->la_valid = rec->sx_valid;
        attr->la_ctime = rec->sx_time;
        attr->la_size = rec->sx_size;
        attr->la_flags = rec->sx_flags;

        if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
                mdt_set_capainfo(info, 0, rr->rr_fid1,
                                 req_capsule_client_get(pill, &RMF_CAPA1));
        else
                mdt_set_capainfo(info, 0, rr->rr_fid1, BYPASS_CAPA);

	rc = mdt_name_unpack(pill, &RMF_NAME, &rr->rr_name, 0);
	if (rc < 0)
		RETURN(rc);

        if (req_capsule_field_present(pill, &RMF_EADATA, RCL_CLIENT)) {
                rr->rr_eadatalen = req_capsule_get_size(pill, &RMF_EADATA,
                                                        RCL_CLIENT);
                if (rr->rr_eadatalen > 0) {
                        rr->rr_eadata = req_capsule_client_get(pill,
                                                               &RMF_EADATA);
                        if (rr->rr_eadata == NULL)
                                RETURN(-EFAULT);
                } else {
                        rr->rr_eadata = NULL;
                }
        } else if (!(attr->la_valid & OBD_MD_FLXATTRRM)) {
                CDEBUG(D_INFO, "no xattr data supplied\n");
                RETURN(-EFAULT);
        }

	if (mdt_dlmreq_unpack(info) < 0)
		RETURN(-EPROTO);

        RETURN(0);
}
Ejemplo n.º 14
0
static int mdt_open_unpack(struct mdt_thread_info *info)
{
	struct lu_ucred         *uc = mdt_ucred(info);
        struct mdt_rec_create   *rec;
        struct lu_attr          *attr = &info->mti_attr.ma_attr;
        struct req_capsule      *pill = info->mti_pill;
        struct mdt_reint_record *rr   = &info->mti_rr;
        struct ptlrpc_request   *req  = mdt_info_req(info);
        struct md_op_spec       *sp   = &info->mti_spec;
        ENTRY;

        CLASSERT(sizeof(struct mdt_rec_create) == sizeof(struct mdt_rec_reint));
        rec = req_capsule_client_get(pill, &RMF_REC_REINT);
        if (rec == NULL)
                RETURN(-EFAULT);

	/* This prior initialization is needed for old_init_ucred_reint() */
	uc->uc_fsuid = rec->cr_fsuid;
	uc->uc_fsgid = rec->cr_fsgid;
	uc->uc_cap   = rec->cr_cap;
	uc->uc_suppgids[0] = rec->cr_suppgid1;
	uc->uc_suppgids[1] = rec->cr_suppgid2;
	uc->uc_umask = rec->cr_umask;

        rr->rr_fid1   = &rec->cr_fid1;
        rr->rr_fid2   = &rec->cr_fid2;
        rr->rr_handle = &rec->cr_old_handle;
        attr->la_mode = rec->cr_mode;
        attr->la_rdev  = rec->cr_rdev;
        attr->la_uid   = rec->cr_fsuid;
        attr->la_gid   = rec->cr_fsgid;
        attr->la_ctime = rec->cr_time;
        attr->la_mtime = rec->cr_time;
        attr->la_atime = rec->cr_time;
        attr->la_valid = LA_MODE  | LA_RDEV  | LA_UID   | LA_GID |
                         LA_CTIME | LA_MTIME | LA_ATIME;
        memset(&info->mti_spec.u, 0, sizeof(info->mti_spec.u));
        info->mti_spec.sp_cr_flags = get_mrc_cr_flags(rec);
        /* Do not trigger ASSERTION if client miss to set such flags. */
        if (unlikely(info->mti_spec.sp_cr_flags == 0))
                RETURN(-EPROTO);
        info->mti_replayepoch = rec->cr_ioepoch;

        info->mti_cross_ref = !!(rec->cr_bias & MDS_CROSS_REF);

        if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
                mdt_set_capainfo(info, 0, rr->rr_fid1,
                                 req_capsule_client_get(pill, &RMF_CAPA1));
        if (req_is_replay(req) &&
            req_capsule_get_size(pill, &RMF_CAPA2, RCL_CLIENT)) {
#if 0
                mdt_set_capainfo(info, 1, rr->rr_fid2,
                                 req_capsule_client_get(pill, &RMF_CAPA2));
#else
                /*
                 * FIXME: capa in replay open request might have expired,
                 * bypass capa check. Security hole?
                 */
                mdt_set_capainfo(info, 0, rr->rr_fid1, BYPASS_CAPA);
                mdt_set_capainfo(info, 1, rr->rr_fid2, BYPASS_CAPA);
#endif
        }

	mdt_name_unpack(pill, &RMF_NAME, &rr->rr_name, MNF_FIX_ANON);

        if (req_capsule_field_present(pill, &RMF_EADATA, RCL_CLIENT)) {
                rr->rr_eadatalen = req_capsule_get_size(pill, &RMF_EADATA,
                                                        RCL_CLIENT);
                if (rr->rr_eadatalen > 0) {
                        rr->rr_eadata = req_capsule_client_get(pill,
                                                               &RMF_EADATA);
                        sp->u.sp_ea.eadatalen = rr->rr_eadatalen;
                        sp->u.sp_ea.eadata = rr->rr_eadata;
                        sp->no_create = !!req_is_replay(req);
			mdt_fix_lov_magic(info);
                }

                /*
                 * Client default md_size may be 0 right after client start,
                 * until all osc are connected, set here just some reasonable
                 * value to prevent misbehavior.
                 */
                if (rr->rr_eadatalen == 0 &&
                    !(info->mti_spec.sp_cr_flags & MDS_OPEN_DELAY_CREATE))
			rr->rr_eadatalen = MIN_MD_SIZE;
	}

        RETURN(0);
}
Ejemplo n.º 15
0
/*
 * VBR: save versions in reply: 0 - parent; 1 - child by fid; 2 - target by
 * name.
 */
static int mdt_reint_link(struct mdt_thread_info *info,
                          struct mdt_lock_handle *lhc)
{
        struct mdt_reint_record *rr = &info->mti_rr;
        struct ptlrpc_request   *req = mdt_info_req(info);
        struct md_attr          *ma = &info->mti_attr;
        struct mdt_object       *ms;
        struct mdt_object       *mp;
        struct mdt_lock_handle  *lhs;
        struct mdt_lock_handle  *lhp;
        struct lu_name          *lname;
        int rc;
        ENTRY;

        DEBUG_REQ(D_INODE, req, "link "DFID" to "DFID"/%s",
                  PFID(rr->rr_fid1), PFID(rr->rr_fid2), rr->rr_name);

        if (OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_LINK))
                RETURN(err_serious(-ENOENT));

        if (info->mti_dlm_req)
                ldlm_request_cancel(req, info->mti_dlm_req, 0);

        if (info->mti_cross_ref) {
                /* MDT holding name ask us to add ref. */
                lhs = &info->mti_lh[MDT_LH_CHILD];
                mdt_lock_reg_init(lhs, LCK_EX);
                ms = mdt_object_find_lock(info, rr->rr_fid1, lhs,
                                          MDS_INODELOCK_UPDATE,
                                          MDT_OBJ_MUST_EXIST);
                if (IS_ERR(ms))
                        RETURN(PTR_ERR(ms));

                mdt_set_capainfo(info, 0, rr->rr_fid1, BYPASS_CAPA);
                rc = mo_ref_add(info->mti_env, mdt_object_child(ms), ma);
                mdt_object_unlock_put(info, ms, lhs, rc);
                RETURN(rc);
        }

        /* Invalid case so return error immediately instead of
         * processing it */
        if (lu_fid_eq(rr->rr_fid1, rr->rr_fid2))
                RETURN(-EPERM);

        /* step 1: find & lock the target parent dir */
        lhp = &info->mti_lh[MDT_LH_PARENT];
        mdt_lock_pdo_init(lhp, LCK_PW, rr->rr_name,
                          rr->rr_namelen);
        mp = mdt_object_find_lock(info, rr->rr_fid2, lhp,
                                  MDS_INODELOCK_UPDATE, MDT_OBJ_MUST_EXIST);
        if (IS_ERR(mp))
                RETURN(PTR_ERR(mp));

        rc = mdt_version_get_check_save(info, mp, 0);
        if (rc)
                GOTO(out_unlock_parent, rc);

        /* step 2: find & lock the source */
        lhs = &info->mti_lh[MDT_LH_CHILD];
        mdt_lock_reg_init(lhs, LCK_EX);

        ms = mdt_object_find(info->mti_env, info->mti_mdt, rr->rr_fid1,
                             MDT_OBJ_MUST_EXIST);
        if (IS_ERR(ms))
                GOTO(out_unlock_parent, rc = PTR_ERR(ms));

        rc = mdt_object_lock(info, ms, lhs, MDS_INODELOCK_UPDATE,
                            MDT_CROSS_LOCK);
        if (rc != 0) {
                mdt_object_put(info->mti_env, ms);
                GOTO(out_unlock_parent, rc);
        }

        /* step 3: link it */
        mdt_fail_write(info->mti_env, info->mti_mdt->mdt_bottom,
                       OBD_FAIL_MDS_REINT_LINK_WRITE);

        info->mti_mos = ms;
        rc = mdt_version_get_check_save(info, ms, 1);
        if (rc)
                GOTO(out_unlock_child, rc);

        lname = mdt_name(info->mti_env, (char *)rr->rr_name, rr->rr_namelen);
        /** check target version by name during replay */
        rc = mdt_lookup_version_check(info, mp, lname, &info->mti_tmp_fid1, 2);
        if (rc != 0 && rc != -ENOENT)
                GOTO(out_unlock_child, rc);
        /* save version of file name for replay, it must be ENOENT here */
        if (!req_is_replay(mdt_info_req(info))) {
                info->mti_ver[2] = ENOENT_VERSION;
                mdt_version_save(mdt_info_req(info), info->mti_ver[2], 2);
        }

        rc = mdo_link(info->mti_env, mdt_object_child(mp),
                      mdt_object_child(ms), lname, ma);

        if (rc == 0)
                mdt_counter_incr(req->rq_export, LPROC_MDT_LINK);

        EXIT;
out_unlock_child:
        mdt_object_unlock_put(info, ms, lhs, rc);
out_unlock_parent:
        mdt_object_unlock_put(info, mp, lhp, rc);
        return rc;
}
Ejemplo n.º 16
0
static int mdt_create_unpack(struct mdt_thread_info *info)
{
	struct lu_ucred         *uc  = mdt_ucred(info);
        struct mdt_rec_create   *rec;
        struct lu_attr          *attr = &info->mti_attr.ma_attr;
        struct mdt_reint_record *rr = &info->mti_rr;
        struct req_capsule      *pill = info->mti_pill;
        struct md_op_spec       *sp = &info->mti_spec;
        int rc;
        ENTRY;

        CLASSERT(sizeof(struct mdt_rec_create) == sizeof(struct mdt_rec_reint));
        rec = req_capsule_client_get(pill, &RMF_REC_REINT);
        if (rec == NULL)
                RETURN(-EFAULT);

	/* This prior initialization is needed for old_init_ucred_reint() */
	uc->uc_fsuid = rec->cr_fsuid;
	uc->uc_fsgid = rec->cr_fsgid;
	uc->uc_cap   = rec->cr_cap;
	uc->uc_suppgids[0] = rec->cr_suppgid1;
	uc->uc_suppgids[1] = -1;
	uc->uc_umask = rec->cr_umask;

        rr->rr_fid1 = &rec->cr_fid1;
        rr->rr_fid2 = &rec->cr_fid2;
        attr->la_mode = rec->cr_mode;
        attr->la_rdev  = rec->cr_rdev;
        attr->la_uid   = rec->cr_fsuid;
        attr->la_gid   = rec->cr_fsgid;
        attr->la_ctime = rec->cr_time;
        attr->la_mtime = rec->cr_time;
        attr->la_atime = rec->cr_time;
	attr->la_valid = LA_MODE | LA_RDEV | LA_UID | LA_GID | LA_TYPE |
			 LA_CTIME | LA_MTIME | LA_ATIME;
        memset(&sp->u, 0, sizeof(sp->u));
        sp->sp_cr_flags = get_mrc_cr_flags(rec);

        if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
                mdt_set_capainfo(info, 0, rr->rr_fid1,
                                 req_capsule_client_get(pill, &RMF_CAPA1));
        mdt_set_capainfo(info, 1, rr->rr_fid2, BYPASS_CAPA);

	rc = mdt_name_unpack(pill, &RMF_NAME, &rr->rr_name, 0);
	if (rc < 0)
		RETURN(rc);

	if (S_ISLNK(attr->la_mode)) {
                const char *tgt = NULL;

                req_capsule_extend(pill, &RQF_MDS_REINT_CREATE_SYM);
                if (req_capsule_get_size(pill, &RMF_SYMTGT, RCL_CLIENT)) {
                        tgt = req_capsule_client_get(pill, &RMF_SYMTGT);
                        sp->u.sp_symname = tgt;
                }
                if (tgt == NULL)
                        RETURN(-EFAULT);
        } else {
                req_capsule_extend(pill, &RQF_MDS_REINT_CREATE_RMT_ACL);
		if (S_ISDIR(attr->la_mode) &&
		    req_capsule_get_size(pill, &RMF_EADATA, RCL_CLIENT) > 0) {
			sp->u.sp_ea.eadata =
				req_capsule_client_get(pill, &RMF_EADATA);
			sp->u.sp_ea.eadatalen =
				req_capsule_get_size(pill, &RMF_EADATA,
						     RCL_CLIENT);
			sp->sp_cr_flags |= MDS_OPEN_HAS_EA;
		}
	}

	rc = mdt_dlmreq_unpack(info);
	RETURN(rc);
}
Ejemplo n.º 17
0
/*
 * VBR: save parent version in reply and child version getting by its name.
 * Version of child is getting and checking during its lookup. If
 */
static int mdt_reint_unlink(struct mdt_thread_info *info,
                            struct mdt_lock_handle *lhc)
{
        struct mdt_reint_record *rr = &info->mti_rr;
        struct ptlrpc_request   *req = mdt_info_req(info);
        struct md_attr          *ma = &info->mti_attr;
        struct lu_fid           *child_fid = &info->mti_tmp_fid1;
        struct mdt_object       *mp;
        struct mdt_object       *mc;
        struct mdt_lock_handle  *parent_lh;
        struct mdt_lock_handle  *child_lh;
        struct lu_name          *lname;
        int                      rc;
        ENTRY;

        DEBUG_REQ(D_INODE, req, "unlink "DFID"/%s", PFID(rr->rr_fid1),
                  rr->rr_name);

        if (info->mti_dlm_req)
                ldlm_request_cancel(req, info->mti_dlm_req, 0);

        if (OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_UNLINK))
                RETURN(err_serious(-ENOENT));

        /*
	 * step 1: Found the parent.
         */
	mp = mdt_object_find(info->mti_env, info->mti_mdt, rr->rr_fid1);
	if (IS_ERR(mp)) {
		rc = PTR_ERR(mp);
		GOTO(out, rc);
	}

	if (mdt_object_obf(mp))
		GOTO(put_parent, rc = -EPERM);

	parent_lh = &info->mti_lh[MDT_LH_PARENT];
	lname = mdt_name(info->mti_env, (char *)rr->rr_name, rr->rr_namelen);
	if (mdt_object_remote(mp)) {
		mdt_lock_reg_init(parent_lh, LCK_EX);
		rc = mdt_remote_object_lock(info, mp, &parent_lh->mlh_rreg_lh,
					    parent_lh->mlh_rreg_mode,
					    MDS_INODELOCK_UPDATE);
		if (rc != ELDLM_OK)
			GOTO(put_parent, rc);

	} else {
		mdt_lock_pdo_init(parent_lh, LCK_PW, rr->rr_name,
				  rr->rr_namelen);
		rc = mdt_object_lock(info, mp, parent_lh, MDS_INODELOCK_UPDATE,
				     MDT_LOCAL_LOCK);
		if (rc)
			GOTO(put_parent, rc);

		rc = mdt_version_get_check_save(info, mp, 0);
		if (rc)
			GOTO(unlock_parent, rc);
	}

	/* step 2: find & lock the child */
	/* lookup child object along with version checking */
	fid_zero(child_fid);
	rc = mdt_lookup_version_check(info, mp, lname, child_fid, 1);
	if (rc != 0)
		GOTO(unlock_parent, rc);

        mdt_reint_init_ma(info, ma);

	/* We will lock the child regardless it is local or remote. No harm. */
	mc = mdt_object_find(info->mti_env, info->mti_mdt, child_fid);
	if (IS_ERR(mc))
		GOTO(unlock_parent, rc = PTR_ERR(mc));

        child_lh = &info->mti_lh[MDT_LH_CHILD];
        mdt_lock_reg_init(child_lh, LCK_EX);
	if (mdt_object_remote(mc)) {
		struct mdt_body	 *repbody;

		if (!fid_is_zero(rr->rr_fid2)) {
			CDEBUG(D_INFO, "%s: name %s can not find "DFID"\n",
			       mdt2obd_dev(info->mti_mdt)->obd_name,
			       (char *)rr->rr_name, PFID(mdt_object_fid(mc)));
			GOTO(unlock_parent, rc = -ENOENT);
		}
		CDEBUG(D_INFO, "%s: name %s: "DFID" is another MDT\n",
		       mdt2obd_dev(info->mti_mdt)->obd_name,
		       (char *)rr->rr_name, PFID(mdt_object_fid(mc)));

		if (info->mti_spec.sp_rm_entry) {
			struct lu_ucred *uc  = mdt_ucred(info);

			if (!md_capable(uc, CFS_CAP_SYS_ADMIN)) {
				CERROR("%s: unlink remote entry is only "
				       "permitted for administrator: rc = %d\n",
					mdt2obd_dev(info->mti_mdt)->obd_name,
					-EPERM);
				GOTO(unlock_parent, rc = -EPERM);
			}

			ma->ma_need = MA_INODE;
			ma->ma_valid = 0;
			mdt_set_capainfo(info, 1, child_fid, BYPASS_CAPA);
			rc = mdo_unlink(info->mti_env, mdt_object_child(mp),
					NULL, lname, ma);
			mdt_object_put(info->mti_env, mc);
			GOTO(unlock_parent, rc);
		}
		/* Revoke the LOOKUP lock of the remote object granted by
		 * this MDT. Since the unlink will happen on another MDT,
		 * it will release the LOOKUP lock right away. Then What
		 * would happen if another client try to grab the LOOKUP
		 * lock at the same time with unlink XXX */
		mdt_object_lock(info, mc, child_lh, MDS_INODELOCK_LOOKUP,
				MDT_CROSS_LOCK);
		repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
		LASSERT(repbody != NULL);
		repbody->fid1 = *mdt_object_fid(mc);
		repbody->valid |= (OBD_MD_FLID | OBD_MD_MDS);
		mdt_object_unlock_put(info, mc, child_lh, rc);
		GOTO(unlock_parent, rc = -EREMOTE);
	} else if (info->mti_spec.sp_rm_entry) {
		CERROR("%s: lfs rmdir should not be used on local dir %s\n",
		       mdt2obd_dev(info->mti_mdt)->obd_name,
		       (char *)rr->rr_name);
		mdt_object_put(info->mti_env, mc);
		GOTO(unlock_parent, rc = -EPERM);
	}

        rc = mdt_object_lock(info, mc, child_lh, MDS_INODELOCK_FULL,
                             MDT_CROSS_LOCK);
	if (rc != 0) {
		mdt_object_put(info->mti_env, mc);
		GOTO(unlock_parent, rc);
	}

        mdt_fail_write(info->mti_env, info->mti_mdt->mdt_bottom,
                       OBD_FAIL_MDS_REINT_UNLINK_WRITE);
        /* save version when object is locked */
        mdt_version_get_save(info, mc, 1);
        /*
         * Now we can only make sure we need MA_INODE, in mdd layer, will check
         * whether need MA_LOV and MA_COOKIE.
         */
        ma->ma_need = MA_INODE;
        ma->ma_valid = 0;
        mdt_set_capainfo(info, 1, child_fid, BYPASS_CAPA);
        rc = mdo_unlink(info->mti_env, mdt_object_child(mp),
                        mdt_object_child(mc), lname, ma);
	if (rc == 0 && !lu_object_is_dying(&mc->mot_header))
		rc = mdt_attr_get_complex(info, mc, ma);
        if (rc == 0)
                mdt_handle_last_unlink(info, mc, ma);

        if (ma->ma_valid & MA_INODE) {
                switch (ma->ma_attr.la_mode & S_IFMT) {
                case S_IFDIR:
			mdt_counter_incr(req, LPROC_MDT_RMDIR);
                        break;
                case S_IFREG:
                case S_IFLNK:
                case S_IFCHR:
                case S_IFBLK:
                case S_IFIFO:
                case S_IFSOCK:
			mdt_counter_incr(req, LPROC_MDT_UNLINK);
                        break;
                default:
                        LASSERTF(0, "bad file type %o unlinking\n",
                                 ma->ma_attr.la_mode);
                }
        }

        EXIT;

        mdt_object_unlock_put(info, mc, child_lh, rc);
unlock_parent:
	mdt_object_unlock(info, mp, parent_lh, rc);
put_parent:
	mdt_object_put(info->mti_env, mp);
out:
        return rc;
}
Ejemplo n.º 18
0
/*
 * VBR: rename versions in reply: 0 - src parent; 1 - tgt parent;
 * 2 - src child; 3 - tgt child.
 * Update on disk version of src child.
 */
static int mdt_reint_rename(struct mdt_thread_info *info,
                            struct mdt_lock_handle *lhc)
{
        struct mdt_reint_record *rr = &info->mti_rr;
        struct md_attr          *ma = &info->mti_attr;
        struct ptlrpc_request   *req = mdt_info_req(info);
        struct mdt_object       *msrcdir;
        struct mdt_object       *mtgtdir;
        struct mdt_object       *mold;
        struct mdt_object       *mnew = NULL;
        struct mdt_lock_handle  *lh_srcdirp;
        struct mdt_lock_handle  *lh_tgtdirp;
        struct mdt_lock_handle  *lh_oldp;
        struct mdt_lock_handle  *lh_newp;
        struct lu_fid           *old_fid = &info->mti_tmp_fid1;
        struct lu_fid           *new_fid = &info->mti_tmp_fid2;
        struct lustre_handle     rename_lh = { 0 };
        struct lu_name           slname = { 0 };
        struct lu_name          *lname;
        int                      rc;
        ENTRY;

        if (info->mti_dlm_req)
                ldlm_request_cancel(req, info->mti_dlm_req, 0);

        DEBUG_REQ(D_INODE, req, "rename "DFID"/%s to "DFID"/%s",
                  PFID(rr->rr_fid1), rr->rr_name,
                  PFID(rr->rr_fid2), rr->rr_tgt);

	rc = mdt_rename_lock(info, &rename_lh);
	if (rc) {
		CERROR("Can't lock FS for rename, rc %d\n", rc);
		RETURN(rc);
	}

        lh_newp = &info->mti_lh[MDT_LH_NEW];

        /* step 1: lock the source dir. */
        lh_srcdirp = &info->mti_lh[MDT_LH_PARENT];
        mdt_lock_pdo_init(lh_srcdirp, LCK_PW, rr->rr_name,
                          rr->rr_namelen);
        msrcdir = mdt_object_find_lock(info, rr->rr_fid1, lh_srcdirp,
                                       MDS_INODELOCK_UPDATE);
        if (IS_ERR(msrcdir))
                GOTO(out_rename_lock, rc = PTR_ERR(msrcdir));

        if (mdt_object_obf(msrcdir))
                GOTO(out_unlock_source, rc = -EPERM);

        rc = mdt_version_get_check_save(info, msrcdir, 0);
        if (rc)
                GOTO(out_unlock_source, rc);

        /* step 2: find & lock the target dir. */
        lh_tgtdirp = &info->mti_lh[MDT_LH_CHILD];
        mdt_lock_pdo_init(lh_tgtdirp, LCK_PW, rr->rr_tgt,
                          rr->rr_tgtlen);
        if (lu_fid_eq(rr->rr_fid1, rr->rr_fid2)) {
                mdt_object_get(info->mti_env, msrcdir);
                mtgtdir = msrcdir;
                if (lh_tgtdirp->mlh_pdo_hash != lh_srcdirp->mlh_pdo_hash) {
                         rc = mdt_pdir_hash_lock(info, lh_tgtdirp, mtgtdir,
                                                 MDS_INODELOCK_UPDATE);
                         if (rc)
                                 GOTO(out_unlock_source, rc);
                         OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_PDO_LOCK2, 10);
                }
        } else {
                mtgtdir = mdt_object_find(info->mti_env, info->mti_mdt,
                                          rr->rr_fid2);
                if (IS_ERR(mtgtdir))
                        GOTO(out_unlock_source, rc = PTR_ERR(mtgtdir));

                if (mdt_object_obf(mtgtdir))
                        GOTO(out_put_target, rc = -EPERM);

                /* check early, the real version will be saved after locking */
                rc = mdt_version_get_check(info, mtgtdir, 1);
                if (rc)
                        GOTO(out_put_target, rc);

		if (unlikely(mdt_object_remote(mtgtdir))) {
			CDEBUG(D_INFO, "Source dir "DFID" target dir "DFID
			       "on different MDTs\n", PFID(rr->rr_fid1),
			       PFID(rr->rr_fid2));
			GOTO(out_put_target, rc = -EXDEV);
		} else {
			if (likely(mdt_object_exists(mtgtdir))) {
				/* we lock the target dir if it is local */
				rc = mdt_object_lock(info, mtgtdir, lh_tgtdirp,
						     MDS_INODELOCK_UPDATE,
						     MDT_LOCAL_LOCK);
				if (rc != 0)
					GOTO(out_put_target, rc);
				/* get and save correct version after locking */
				mdt_version_get_save(info, mtgtdir, 1);
			} else {
				GOTO(out_put_target, rc = -ESTALE);
			}
		}
	}

        /* step 3: find & lock the old object. */
        lname = mdt_name(info->mti_env, (char *)rr->rr_name, rr->rr_namelen);
        mdt_name_copy(&slname, lname);
        fid_zero(old_fid);
        rc = mdt_lookup_version_check(info, msrcdir, &slname, old_fid, 2);
        if (rc != 0)
                GOTO(out_unlock_target, rc);

        if (lu_fid_eq(old_fid, rr->rr_fid1) || lu_fid_eq(old_fid, rr->rr_fid2))
                GOTO(out_unlock_target, rc = -EINVAL);

	mold = mdt_object_find(info->mti_env, info->mti_mdt, old_fid);
	if (IS_ERR(mold))
		GOTO(out_unlock_target, rc = PTR_ERR(mold));
	if (mdt_object_remote(mold)) {
		mdt_object_put(info->mti_env, mold);
		CDEBUG(D_INFO, "Source child "DFID" is on another MDT\n",
		       PFID(old_fid));
		GOTO(out_unlock_target, rc = -EXDEV);
	}

	if (mdt_object_obf(mold)) {
		mdt_object_put(info->mti_env, mold);
		GOTO(out_unlock_target, rc = -EPERM);
	}

        lh_oldp = &info->mti_lh[MDT_LH_OLD];
        mdt_lock_reg_init(lh_oldp, LCK_EX);
        rc = mdt_object_lock(info, mold, lh_oldp, MDS_INODELOCK_LOOKUP,
                             MDT_CROSS_LOCK);
        if (rc != 0) {
                mdt_object_put(info->mti_env, mold);
                GOTO(out_unlock_target, rc);
        }

        info->mti_mos = mold;
        /* save version after locking */
        mdt_version_get_save(info, mold, 2);
        mdt_set_capainfo(info, 2, old_fid, BYPASS_CAPA);

        /* step 4: find & lock the new object. */
        /* new target object may not exist now */
        lname = mdt_name(info->mti_env, (char *)rr->rr_tgt, rr->rr_tgtlen);
        /* lookup with version checking */
        fid_zero(new_fid);
        rc = mdt_lookup_version_check(info, mtgtdir, lname, new_fid, 3);
        if (rc == 0) {
                /* the new_fid should have been filled at this moment */
                if (lu_fid_eq(old_fid, new_fid))
                       GOTO(out_unlock_old, rc);

                if (lu_fid_eq(new_fid, rr->rr_fid1) ||
                    lu_fid_eq(new_fid, rr->rr_fid2))
                        GOTO(out_unlock_old, rc = -EINVAL);

                mdt_lock_reg_init(lh_newp, LCK_EX);
                mnew = mdt_object_find(info->mti_env, info->mti_mdt, new_fid);
                if (IS_ERR(mnew))
                        GOTO(out_unlock_old, rc = PTR_ERR(mnew));

		if (mdt_object_obf(mnew)) {
			mdt_object_put(info->mti_env, mnew);
			GOTO(out_unlock_old, rc = -EPERM);
		}

		if (mdt_object_remote(mnew)) {
			mdt_object_put(info->mti_env, mnew);
			CDEBUG(D_INFO, "src child "DFID" is on another MDT\n",
			       PFID(new_fid));
			GOTO(out_unlock_old, rc = -EXDEV);
		}

                rc = mdt_object_lock(info, mnew, lh_newp,
                                     MDS_INODELOCK_FULL, MDT_CROSS_LOCK);
                if (rc != 0) {
                        mdt_object_put(info->mti_env, mnew);
                        GOTO(out_unlock_old, rc);
                }
                /* get and save version after locking */
                mdt_version_get_save(info, mnew, 3);
                mdt_set_capainfo(info, 3, new_fid, BYPASS_CAPA);
        } else if (rc != -EREMOTE && rc != -ENOENT) {
                GOTO(out_unlock_old, rc);
        } else {
                mdt_enoent_version_save(info, 3);
        }

        /* step 5: rename it */
        mdt_reint_init_ma(info, ma);

        mdt_fail_write(info->mti_env, info->mti_mdt->mdt_bottom,
                       OBD_FAIL_MDS_REINT_RENAME_WRITE);


        /* Check if @dst is subdir of @src. */
        rc = mdt_rename_sanity(info, old_fid);
        if (rc)
                GOTO(out_unlock_new, rc);

        rc = mdo_rename(info->mti_env, mdt_object_child(msrcdir),
                        mdt_object_child(mtgtdir), old_fid, &slname,
                        (mnew ? mdt_object_child(mnew) : NULL),
                        lname, ma);

        /* handle last link of tgt object */
        if (rc == 0) {
		mdt_counter_incr(req, LPROC_MDT_RENAME);
                if (mnew)
                        mdt_handle_last_unlink(info, mnew, ma);

		mdt_rename_counter_tally(info, info->mti_mdt, req,
                                         msrcdir, mtgtdir);
        }

        EXIT;
out_unlock_new:
        if (mnew)
                mdt_object_unlock_put(info, mnew, lh_newp, rc);
out_unlock_old:
        mdt_object_unlock_put(info, mold, lh_oldp, rc);
out_unlock_target:
        mdt_object_unlock(info, mtgtdir, lh_tgtdirp, rc);
out_put_target:
        mdt_object_put(info->mti_env, mtgtdir);
out_unlock_source:
        mdt_object_unlock_put(info, msrcdir, lh_srcdirp, rc);
out_rename_lock:
	if (lustre_handle_is_used(&rename_lh))
		mdt_rename_unlock(&rename_lh);
	return rc;
}