out:
if (rc >= 0) {
mdt_counter_incr(req, LPROC_MDT_GETXATTR);
+ /* LU-11109: Set OBD_MD_FLXATTR on success so that
+ * newer clients can distinguish between nonexistent
+ * xattrs and zero length values. */
+ repbody->mbo_valid |= OBD_MD_FLXATTR;
repbody->mbo_eadatasize = rc;
rc = 0;
}
return rc;
}
+/* shrink dir layout after migration */
+static int mdt_dir_layout_shrink(struct mdt_thread_info *info)
+{
+ const struct lu_env *env = info->mti_env;
+ struct mdt_device *mdt = info->mti_mdt;
+ struct mdt_reint_record *rr = &info->mti_rr;
+ struct lmv_user_md *lmu = rr->rr_eadata;
+ __u32 lum_stripe_count = lmu->lum_stripe_count;
+ struct lu_buf *buf = &info->mti_buf;
+ struct lmv_mds_md_v1 *lmv;
+ struct md_attr *ma = &info->mti_attr;
+ struct ldlm_enqueue_info *einfo = &info->mti_einfo[0];
+ struct mdt_object *pobj = NULL;
+ struct mdt_object *obj;
+ struct mdt_lock_handle *lhp = NULL;
+ struct mdt_lock_handle *lhc;
+ int rc;
+
+ ENTRY;
+
+ rc = mdt_remote_dir_permission(info);
+ if (rc)
+ RETURN(rc);
+
+ /* mti_big_lmm is used to save LMV, but it may be uninitialized. */
+ if (unlikely(!info->mti_big_lmm)) {
+ info->mti_big_lmmsize = lmv_mds_md_size(64, LMV_MAGIC);
+ OBD_ALLOC(info->mti_big_lmm, info->mti_big_lmmsize);
+ if (!info->mti_big_lmm)
+ RETURN(-ENOMEM);
+ }
+
+ obj = mdt_object_find(env, mdt, rr->rr_fid1);
+ if (IS_ERR(obj))
+ RETURN(PTR_ERR(obj));
+
+relock:
+ /* lock object */
+ lhc = &info->mti_lh[MDT_LH_CHILD];
+ mdt_lock_reg_init(lhc, LCK_EX);
+ rc = mdt_reint_striped_lock(info, obj, lhc, MDS_INODELOCK_FULL, einfo,
+ true);
+ if (rc)
+ GOTO(put_obj, rc);
+
+ ma->ma_lmv = info->mti_big_lmm;
+ ma->ma_lmv_size = info->mti_big_lmmsize;
+ ma->ma_valid = 0;
+ rc = mdt_stripe_get(info, obj, ma, XATTR_NAME_LMV);
+ if (rc)
+ GOTO(unlock_obj, rc);
+
+ /* user may run 'lfs migrate' multiple times, so it's shrunk already */
+ if (!(ma->ma_valid & MA_LMV))
+ GOTO(unlock_obj, rc = -EALREADY);
+
+ lmv = &ma->ma_lmv->lmv_md_v1;
+
+ /* ditto */
+ if (!(le32_to_cpu(lmv->lmv_hash_type) & LMV_HASH_FLAG_MIGRATION))
+ GOTO(unlock_obj, rc = -EALREADY);
+
+ lum_stripe_count = lmu->lum_stripe_count;
+ if (!lum_stripe_count)
+ lum_stripe_count = cpu_to_le32(1);
+
+ if (lmv->lmv_migrate_offset != lum_stripe_count) {
+ CERROR("%s: "DFID" migrate mdt count mismatch %u != %u\n",
+ mdt_obd_name(info->mti_mdt), PFID(rr->rr_fid1),
+ lmv->lmv_migrate_offset, lmu->lum_stripe_count);
+ GOTO(unlock_obj, rc = -EINVAL);
+ }
+
+ if (lmv->lmv_master_mdt_index != lmu->lum_stripe_offset) {
+ CERROR("%s: "DFID" migrate mdt index mismatch %u != %u\n",
+ mdt_obd_name(info->mti_mdt), PFID(rr->rr_fid1),
+ lmv->lmv_master_mdt_index, lmu->lum_stripe_offset);
+ GOTO(unlock_obj, rc = -EINVAL);
+ }
+
+ if (lum_stripe_count > 1 &&
+ (lmv->lmv_hash_type & cpu_to_le32(LMV_HASH_TYPE_MASK)) !=
+ lmu->lum_hash_type) {
+ CERROR("%s: "DFID" migrate mdt hash mismatch %u != %u\n",
+ mdt_obd_name(info->mti_mdt), PFID(rr->rr_fid1),
+ lmv->lmv_hash_type, lmu->lum_hash_type);
+ GOTO(unlock_obj, rc = -EINVAL);
+ }
+
+ if (le32_to_cpu(lmu->lum_stripe_count) < 2 && !pobj) {
+ /*
+ * lock parent because dir will be shrunk to be 1 stripe, which
+ * should be converted to normal directory, but that will
+ * change dir fid and update namespace of parent.
+ */
+ lhp = &info->mti_lh[MDT_LH_PARENT];
+ mdt_lock_reg_init(lhp, LCK_PW);
+
+ /* get parent from PFID */
+ ma->ma_need |= MA_PFID;
+ ma->ma_valid = 0;
+ rc = mdt_attr_get_complex(info, obj, ma);
+ if (rc)
+ GOTO(unlock_obj, rc);
+
+ if (!(ma->ma_valid & MA_PFID))
+ GOTO(unlock_obj, rc = -ENOTSUPP);
+
+ pobj = mdt_object_find(env, mdt, &ma->ma_pfid);
+ if (IS_ERR(pobj)) {
+ rc = PTR_ERR(pobj);
+ pobj = NULL;
+ GOTO(unlock_obj, rc);
+ }
+
+ mdt_reint_striped_unlock(info, obj, lhc, einfo, 1);
+
+ if (mdt_object_remote(pobj)) {
+ rc = mdt_remote_object_lock(info, pobj, rr->rr_fid1,
+ &lhp->mlh_rreg_lh, LCK_EX,
+ MDS_INODELOCK_LOOKUP,
+ false);
+ if (rc != ELDLM_OK) {
+ mdt_object_put(env, pobj);
+ GOTO(put_obj, rc);
+ }
+ mdt_object_unlock(info, NULL, lhp, 1);
+ }
+
+ rc = mdt_reint_object_lock(info, pobj, lhp,
+ MDS_INODELOCK_UPDATE, true);
+ if (rc) {
+ mdt_object_put(env, pobj);
+ GOTO(put_obj, rc);
+ }
+
+ goto relock;
+ }
+
+ buf->lb_buf = rr->rr_eadata;
+ buf->lb_len = rr->rr_eadatalen;
+ rc = mo_xattr_set(env, mdt_object_child(obj), buf, XATTR_NAME_LMV, 0);
+ GOTO(unlock_obj, rc);
+
+unlock_obj:
+ mdt_reint_striped_unlock(info, obj, lhc, einfo, rc);
+ if (pobj)
+ mdt_object_unlock_put(info, pobj, lhp, rc);
+put_obj:
+ mdt_object_put(env, obj);
+
+ return rc;
+}
+
int mdt_reint_setxattr(struct mdt_thread_info *info,
struct mdt_lock_handle *unused)
{
} else if (strncmp(xattr_name, XATTR_TRUSTED_PREFIX,
sizeof(XATTR_TRUSTED_PREFIX) - 1) == 0) {
+ /* setxattr(LMV) with lum is used to shrink dir layout */
+ if (strcmp(xattr_name, XATTR_NAME_LMV) == 0) {
+ __u32 *magic = rr->rr_eadata;
+
+ if (le32_to_cpu(*magic) == LMV_USER_MAGIC ||
+ le32_to_cpu(*magic) == LMV_USER_MAGIC_SPECIFIC) {
+ rc = mdt_dir_layout_shrink(info);
+ GOTO(out, rc);
+ }
+ }
+
if (!md_capable(mdt_ucred(info), CFS_CAP_SYS_ADMIN))
GOTO(out, rc = -EPERM);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff