From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S935355AbeE2O3U (ORCPT ); Tue, 29 May 2018 10:29:20 -0400 Received: from smtp4.ccs.ornl.gov ([160.91.203.40]:38132 "EHLO smtp4.ccs.ornl.gov" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934980AbeE2OV7 (ORCPT ); Tue, 29 May 2018 10:21:59 -0400 From: James Simmons To: Greg Kroah-Hartman , devel@driverdev.osuosl.org, Andreas Dilger , Oleg Drokin , NeilBrown Cc: Linux Kernel Mailing List , Lustre Development List , "John L. Hammond" , James Simmons Subject: [PATCH v2 6/6] staging: lustre: mdc: use large xattr buffers for old servers Date: Tue, 29 May 2018 10:21:45 -0400 Message-Id: <1527603705-30450-7-git-send-email-jsimmons@infradead.org> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1527603705-30450-1-git-send-email-jsimmons@infradead.org> References: <1527603705-30450-1-git-send-email-jsimmons@infradead.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: "John L. Hammond" Pre 2.10.1 MDTs will crash when they receive a listxattr (MDS_GETXATTR with OBD_MD_FLXATTRLS) RPC for an orphan or dead object. So for clients connected to these older MDTs, try to avoid sending listxattr RPCs by making the bulk getxattr (MDS_GETXATTR with OBD_MD_FLXATTRALL) more likely to succeed and thereby reducing the chances of falling back to listxattr. Signed-off-by: John L. Hammond Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-10912 Reviewed-on: https://review.whamcloud.com/31990 Reviewed-by: Andreas Dilger Reviewed-by: Fan Yong Reviewed-by: Oleg Drokin Signed-off-by: James Simmons --- Changelog: v1) Initial patch v2) Rebased patch. No changes drivers/staging/lustre/lustre/mdc/mdc_locks.c | 31 +++++++++++++++++++++------ 1 file changed, 24 insertions(+), 7 deletions(-) diff --git a/drivers/staging/lustre/lustre/mdc/mdc_locks.c b/drivers/staging/lustre/lustre/mdc/mdc_locks.c index a8aa0fa..b991c6f 100644 --- a/drivers/staging/lustre/lustre/mdc/mdc_locks.c +++ b/drivers/staging/lustre/lustre/mdc/mdc_locks.c @@ -326,8 +326,10 @@ static void mdc_realloc_openmsg(struct ptlrpc_request *req, { struct ptlrpc_request *req; struct ldlm_intent *lit; + u32 min_buf_size = 0; int rc, count = 0; LIST_HEAD(cancels); + u32 buf_size = 0; req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_LDLM_INTENT_GETXATTR); @@ -344,18 +346,33 @@ static void mdc_realloc_openmsg(struct ptlrpc_request *req, lit = req_capsule_client_get(&req->rq_pill, &RMF_LDLM_INTENT); lit->opc = IT_GETXATTR; +#if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 0, 53, 0) + /* If the supplied buffer is too small then the server will + * return -ERANGE and llite will fallback to using non cached + * xattr operations. On servers before 2.10.1 a (non-cached) + * listxattr RPC for an orphan or dead file causes an oops. So + * let's try to avoid sending too small a buffer to too old a + * server. This is effectively undoing the memory conservation + * of LU-9417 when it would be *more* likely to crash the + * server. See LU-9856. + */ + if (exp->exp_connect_data.ocd_version < OBD_OCD_VERSION(2, 10, 1, 0)) + min_buf_size = exp->exp_connect_data.ocd_max_easize; +#endif + buf_size = max_t(u32, min_buf_size, + GA_DEFAULT_EA_NAME_LEN * GA_DEFAULT_EA_NUM); + /* pack the intended request */ - mdc_pack_body(req, &op_data->op_fid1, op_data->op_valid, - GA_DEFAULT_EA_NAME_LEN * GA_DEFAULT_EA_NUM, -1, 0); + mdc_pack_body(req, &op_data->op_fid1, op_data->op_valid, buf_size, + -1, 0); - req_capsule_set_size(&req->rq_pill, &RMF_EADATA, RCL_SERVER, - GA_DEFAULT_EA_NAME_LEN * GA_DEFAULT_EA_NUM); + req_capsule_set_size(&req->rq_pill, &RMF_EADATA, RCL_SERVER, buf_size); - req_capsule_set_size(&req->rq_pill, &RMF_EAVALS, RCL_SERVER, - GA_DEFAULT_EA_NAME_LEN * GA_DEFAULT_EA_NUM); + req_capsule_set_size(&req->rq_pill, &RMF_EAVALS, RCL_SERVER, buf_size); req_capsule_set_size(&req->rq_pill, &RMF_EAVALS_LENS, RCL_SERVER, - sizeof(u32) * GA_DEFAULT_EA_NUM); + max_t(u32, min_buf_size, + sizeof(u32) * GA_DEFAULT_EA_NUM)); req_capsule_set_size(&req->rq_pill, &RMF_ACL, RCL_SERVER, 0); -- 1.8.3.1