예제 #1
0
int mdt_attr_set(struct mdt_thread_info *info, struct mdt_object *mo,
                 struct md_attr *ma, int flags)
{
        struct mdt_lock_handle  *lh;
        int do_vbr = ma->ma_attr.la_valid & (LA_MODE|LA_UID|LA_GID|LA_FLAGS);
        __u64 lockpart = MDS_INODELOCK_UPDATE;
        int rc;
        ENTRY;

	/* attr shouldn't be set on remote object */
	LASSERT(!mdt_object_remote(mo));

        lh = &info->mti_lh[MDT_LH_PARENT];
        mdt_lock_reg_init(lh, LCK_PW);

	/* Even though the new MDT will grant PERM lock to the old
	 * client, but the old client will almost ignore that during
	 * So it needs to revoke both LOOKUP and PERM lock here, so
	 * both new and old client can cancel the dcache */
	if (ma->ma_attr.la_valid & (LA_MODE|LA_UID|LA_GID))
		lockpart |= MDS_INODELOCK_LOOKUP | MDS_INODELOCK_PERM;

        rc = mdt_object_lock(info, mo, lh, lockpart, MDT_LOCAL_LOCK);
        if (rc != 0)
                RETURN(rc);

        if (mdt_object_exists(mo) == 0)
                GOTO(out_unlock, rc = -ENOENT);

        /* all attrs are packed into mti_attr in unpack_setattr */
        mdt_fail_write(info->mti_env, info->mti_mdt->mdt_bottom,
                       OBD_FAIL_MDS_REINT_SETATTR_WRITE);

        /* This is only for set ctime when rename's source is on remote MDS. */
        if (unlikely(ma->ma_attr.la_valid == LA_CTIME))
                ma->ma_attr_flags |= MDS_VTX_BYPASS;

        /* VBR: update version if attr changed are important for recovery */
        if (do_vbr) {
                /* update on-disk version of changed object */
                info->mti_mos = mo;
                rc = mdt_version_get_check_save(info, mo, 0);
                if (rc)
                        GOTO(out_unlock, rc);
        }

        /* all attrs are packed into mti_attr in unpack_setattr */
        rc = mo_attr_set(info->mti_env, mdt_object_child(mo), ma);
        if (rc != 0)
                GOTO(out_unlock, rc);

        EXIT;
out_unlock:
        mdt_object_unlock(info, mo, lh, rc);
        return rc;
}
예제 #2
0
파일: mdt_hsm.c 프로젝트: bhanug/lustre
/**
 * Retrieve the current HSM flags, archive id and undergoing HSM requests for
 * the fid provided in RPC body.
 *
 * Current requests are read from coordinator states.
 *
 * This is MDS_HSM_STATE_GET RPC handler.
 */
int mdt_hsm_state_get(struct tgt_session_info *tsi)
{
	struct mdt_thread_info	*info = tsi2mdt_info(tsi);
	struct mdt_object	*obj = info->mti_object;
	struct md_attr		*ma  = &info->mti_attr;
	struct hsm_user_state	*hus;
	struct mdt_lock_handle	*lh;
	int			 rc;
	ENTRY;

	if (info->mti_body == NULL || obj == NULL)
		GOTO(out, rc = -EPROTO);

	/* Only valid if client is remote */
	rc = mdt_init_ucred(info, (struct mdt_body *)info->mti_body);
	if (rc < 0)
		GOTO(out, rc = err_serious(rc));

	lh = &info->mti_lh[MDT_LH_CHILD];
	mdt_lock_reg_init(lh, LCK_PR);
	rc = mdt_object_lock(info, obj, lh, MDS_INODELOCK_LOOKUP);
	if (rc < 0)
		GOTO(out_ucred, rc);

	ma->ma_valid = 0;
	ma->ma_need = MA_HSM;
	rc = mdt_attr_get_complex(info, obj, ma);
	if (rc)
		GOTO(out_unlock, rc);

	hus = req_capsule_server_get(tsi->tsi_pill, &RMF_HSM_USER_STATE);
	if (hus == NULL)
		GOTO(out_unlock, rc = -EPROTO);

	/* Current HSM flags */
	hus->hus_states = ma->ma_hsm.mh_flags;
	hus->hus_archive_id = ma->ma_hsm.mh_arch_id;

	EXIT;
out_unlock:
	mdt_object_unlock(info, obj, lh, 1);
out_ucred:
	mdt_exit_ucred(info);
out:
	mdt_thread_info_fini(info);
	return rc;
}
예제 #3
0
파일: mdt_reint.c 프로젝트: Lezval/lustre
/**
 * Check HSM flags and add HS_DIRTY flag if relevant.
 *
 * A file could be set dirty only if it has a copy in the backend (HS_EXISTS)
 * and is not RELEASED.
 */
int mdt_add_dirty_flag(struct mdt_thread_info *info, struct mdt_object *mo,
			struct md_attr *ma)
{
	int rc;
	ENTRY;

	/* If the file was modified, add the dirty flag */
	ma->ma_need = MA_HSM;
	rc = mdt_attr_get_complex(info, mo, ma);
	if (rc) {
		CERROR("file attribute read error for "DFID": %d.\n",
			PFID(mdt_object_fid(mo)), rc);
		RETURN(rc);
	}

	/* If an up2date copy exists in the backend, add dirty flag */
	if ((ma->ma_valid & MA_HSM) && (ma->ma_hsm.mh_flags & HS_EXISTS)
	    && !(ma->ma_hsm.mh_flags & (HS_DIRTY|HS_RELEASED))) {
		struct mdt_lock_handle  *lh = &info->mti_lh[MDT_LH_CHILD];

		ma->ma_hsm.mh_flags |= HS_DIRTY;

		mdt_lock_reg_init(lh, LCK_PW);
		rc = mdt_object_lock(info, mo, lh, MDS_INODELOCK_XATTR,
				     MDT_LOCAL_LOCK);
		if (rc != 0)
			RETURN(rc);

		rc = mdt_hsm_attr_set(info, mo, &ma->ma_hsm);
		if (rc)
			CERROR("file attribute change error for "DFID": %d\n",
				PFID(mdt_object_fid(mo)), rc);
		mdt_object_unlock(info, mo, lh, rc);
	}

	RETURN(rc);
}
예제 #4
0
파일: mdt_hsm.c 프로젝트: bhanug/lustre
/**
 * Change HSM state and archive number of a file.
 *
 * Archive number is changed iif the value is not 0.
 * The new flagset that will be computed should result in a coherent state.
 * This function checks that flags are compatible.
 *
 * This is MDS_HSM_STATE_SET RPC handler.
 */
int mdt_hsm_state_set(struct tgt_session_info *tsi)
{
	struct mdt_thread_info	*info = tsi2mdt_info(tsi);
	struct mdt_object	*obj = info->mti_object;
	struct md_attr          *ma = &info->mti_attr;
	struct hsm_state_set	*hss;
	struct mdt_lock_handle	*lh;
	int			 rc;
	__u64			 flags;
	ENTRY;

	hss = req_capsule_client_get(info->mti_pill, &RMF_HSM_STATE_SET);

	if (info->mti_body == NULL || obj == NULL || hss == NULL)
		GOTO(out, rc = -EPROTO);

	/* Only valid if client is remote */
	rc = mdt_init_ucred(info, (struct mdt_body *)info->mti_body);
	if (rc < 0)
		GOTO(out, rc = err_serious(rc));

	lh = &info->mti_lh[MDT_LH_CHILD];
	mdt_lock_reg_init(lh, LCK_PW);
	rc = mdt_object_lock(info, obj, lh, MDS_INODELOCK_LOOKUP |
			     MDS_INODELOCK_XATTR);
	if (rc < 0)
		GOTO(out_ucred, rc);

	/* Detect out-of range masks */
	if ((hss->hss_setmask | hss->hss_clearmask) & ~HSM_FLAGS_MASK) {
		CDEBUG(D_HSM, "Incompatible masks provided (set "LPX64
		       ", clear "LPX64") vs supported set (%#x).\n",
		       hss->hss_setmask, hss->hss_clearmask, HSM_FLAGS_MASK);
		GOTO(out_unlock, rc = -EINVAL);
	}

	/* Non-root users are forbidden to set or clear flags which are
	 * NOT defined in HSM_USER_MASK. */
	if (((hss->hss_setmask | hss->hss_clearmask) & ~HSM_USER_MASK) &&
	    !md_capable(mdt_ucred(info), CFS_CAP_SYS_ADMIN)) {
		CDEBUG(D_HSM, "Incompatible masks provided (set "LPX64
		       ", clear "LPX64") vs unprivileged set (%#x).\n",
		       hss->hss_setmask, hss->hss_clearmask, HSM_USER_MASK);
		GOTO(out_unlock, rc = -EPERM);
	}

	/* Read current HSM info */
	ma->ma_valid = 0;
	ma->ma_need = MA_HSM;
	rc = mdt_attr_get_complex(info, obj, ma);
	if (rc)
		GOTO(out_unlock, rc);

	/* Change HSM flags depending on provided masks */
	if (hss->hss_valid & HSS_SETMASK)
		ma->ma_hsm.mh_flags |= hss->hss_setmask;
	if (hss->hss_valid & HSS_CLEARMASK)
		ma->ma_hsm.mh_flags &= ~hss->hss_clearmask;

	/* Change archive_id if provided. */
	if (hss->hss_valid & HSS_ARCHIVE_ID) {
		if (!(ma->ma_hsm.mh_flags & HS_EXISTS)) {
			CDEBUG(D_HSM, "Could not set an archive number for "
			       DFID "if HSM EXISTS flag is not set.\n",
			       PFID(&info->mti_body->mbo_fid1));
			GOTO(out_unlock, rc);
		}

		/* Detect out-of range archive id */
		if (hss->hss_archive_id > LL_HSM_MAX_ARCHIVE) {
			CDEBUG(D_HSM, "archive id %u exceeds maximum %zu.\n",
			       hss->hss_archive_id, LL_HSM_MAX_ARCHIVE);
			GOTO(out_unlock, rc = -EINVAL);
		}

		ma->ma_hsm.mh_arch_id = hss->hss_archive_id;
	}

	/* Check for inconsistant HSM flagset.
	 * DIRTY without EXISTS: no dirty if no archive was created.
	 * DIRTY and RELEASED: a dirty file could not be released.
	 * RELEASED without ARCHIVED: do not release a non-archived file.
	 * LOST without ARCHIVED: cannot lost a non-archived file.
	 */
	flags = ma->ma_hsm.mh_flags;
	if ((flags & HS_DIRTY    && !(flags & HS_EXISTS)) ||
	    (flags & HS_RELEASED && flags & HS_DIRTY) ||
	    (flags & HS_RELEASED && !(flags & HS_ARCHIVED)) ||
	    (flags & HS_LOST     && !(flags & HS_ARCHIVED))) {
		CDEBUG(D_HSM, "Incompatible flag change on "DFID
			      "flags="LPX64"\n",
		       PFID(&info->mti_body->mbo_fid1), flags);
		GOTO(out_unlock, rc = -EINVAL);
	}

	/* Save the modified flags */
	rc = mdt_hsm_attr_set(info, obj, &ma->ma_hsm);
	if (rc)
		GOTO(out_unlock, rc);

	EXIT;

out_unlock:
	mdt_object_unlock(info, obj, lh, 1);
out_ucred:
	mdt_exit_ucred(info);
out:
	mdt_thread_info_fini(info);
	return rc;
}
예제 #5
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);

        /* 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);
        if (IS_ERR(mp))
                RETURN(PTR_ERR(mp));

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

        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);
        if (IS_ERR(ms))
                GOTO(out_unlock_parent, rc = PTR_ERR(ms));

	if (mdt_object_remote(ms)) {
		mdt_object_put(info->mti_env, ms);
		CERROR("Target directory "DFID" is on another MDT\n",
			PFID(rr->rr_fid1));
		GOTO(out_unlock_parent, rc = -EXDEV);
	}

        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, 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;
}
예제 #6
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;
}
예제 #7
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;
}
예제 #8
0
파일: mdt_reint.c 프로젝트: Lezval/lustre
/*
 * 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;
}
예제 #9
0
파일: mdt_reint.c 프로젝트: hpc/lustre
/*
 * 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;
}