From patchwork Tue Apr 26 16:12:04 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Luis Henriques X-Patchwork-Id: 12827440 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id ED5BBC433EF for ; Tue, 26 Apr 2022 16:11:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1352708AbiDZQOq (ORCPT ); Tue, 26 Apr 2022 12:14:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53288 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1345168AbiDZQOp (ORCPT ); Tue, 26 Apr 2022 12:14:45 -0400 Received: from smtp-out2.suse.de (smtp-out2.suse.de [195.135.220.29]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 54CDD9A9A7; Tue, 26 Apr 2022 09:11:37 -0700 (PDT) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id 0E3051F380; Tue, 26 Apr 2022 16:11:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1650989496; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=g6ykGUukp+fKk1ilY1BWV9rT8pwISCf1/1RZl1i49JA=; b=Z5wMDSSH0NV5rrH+auRARz46CA/8MFeIT0UvniY0GVWXTqMvxNB801SQsuV3sBROWLRGXH CNDi0jtEJ0sNp+KCzFEjL/CQVFT+rAdPiW59KeT9TSNOUGFTNMTQWXGiH97lT26XcbPQKw 4SCaa+VP+1/X/NivBkm0dGhK+0YUIX0= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1650989496; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=g6ykGUukp+fKk1ilY1BWV9rT8pwISCf1/1RZl1i49JA=; b=DVhesvHl3LDTQowiqc8Y5a0pc9N3V/wJCLuJj5cEpx4AkQfSe+9+p9SQ76jG67d8lZXCbW qIQ69bHlu9MwjTAQ== Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id 8000E13223; Tue, 26 Apr 2022 16:11:35 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id o5WRHLcZaGLJeQAAMHmgww (envelope-from ); Tue, 26 Apr 2022 16:11:35 +0000 Received: from localhost (brahms.olymp [local]) by brahms.olymp (OpenSMTPD) with ESMTPA id 8bd29aa5; Tue, 26 Apr 2022 16:12:06 +0000 (UTC) From: =?utf-8?q?Lu=C3=ADs_Henriques?= To: Jeff Layton , Xiubo Li , Ilya Dryomov Cc: ceph-devel@vger.kernel.org, linux-kernel@vger.kernel.org, =?utf-8?q?Lu?= =?utf-8?q?=C3=ADs_Henriques?= , Ryan Taylor Subject: [PATCH] ceph: fix statfs for subdir mounts Date: Tue, 26 Apr 2022 17:12:04 +0100 Message-Id: <20220426161204.17896-1-lhenriques@suse.de> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: ceph-devel@vger.kernel.org When doing a mount using as base a directory that has 'max_bytes' quotas statfs uses that value as the total; if a subdirectory is used instead, the same 'max_bytes' too in statfs, unless there is another quota set. Unfortunately, if this subdirectory only has the 'max_files' quota set, then statfs uses the filesystem total. Fix this by making sure we only lookup realms that contain the 'max_bytes' quota. Link: https://tracker.ceph.com/issues/55090 Cc: Ryan Taylor Signed-off-by: Luís Henriques --- Hi! Unfortunately, I don't think this is the real fix for the bug reported in the tracker (or by Ryan on the mailing-list). I haven't seen any reference to 'max_files' so I suspect Ryan and Dan are hitting another bug. This can be easily checked by 'getfattr -n ceph.quota '. Also, Dan (in the tracker) states the bug is on the kernel client only but I can also see if in the fuse client. Anyway, this patch fixes a real bug. fs/ceph/quota.c | 35 +++++++++++++++++++++++++++-------- 1 file changed, 27 insertions(+), 8 deletions(-) diff --git a/fs/ceph/quota.c b/fs/ceph/quota.c index a338a3ec0dc4..235a8d06a8ee 100644 --- a/fs/ceph/quota.c +++ b/fs/ceph/quota.c @@ -193,11 +193,17 @@ void ceph_cleanup_quotarealms_inodes(struct ceph_mds_client *mdsc) mutex_unlock(&mdsc->quotarealms_inodes_mutex); } +enum quota_get_realm { + QUOTA_GET_MAX_FILES, + QUOTA_GET_MAX_BYTES, + QUOTA_GET_ANY +}; + /* * This function walks through the snaprealm for an inode and returns the - * ceph_snap_realm for the first snaprealm that has quotas set (either max_files - * or max_bytes). If the root is reached, return the root ceph_snap_realm - * instead. + * ceph_snap_realm for the first snaprealm that has quotas set (max_files, + * max_bytes, or any, depending on the 'which_quota' argument). If the root is + * reached, return the root ceph_snap_realm instead. * * Note that the caller is responsible for calling ceph_put_snap_realm() on the * returned realm. @@ -209,7 +215,9 @@ void ceph_cleanup_quotarealms_inodes(struct ceph_mds_client *mdsc) * will be restarted. */ static struct ceph_snap_realm *get_quota_realm(struct ceph_mds_client *mdsc, - struct inode *inode, bool retry) + struct inode *inode, + enum quota_get_realm which_quota, + bool retry) { struct ceph_inode_info *ci = NULL; struct ceph_snap_realm *realm, *next; @@ -248,7 +256,17 @@ static struct ceph_snap_realm *get_quota_realm(struct ceph_mds_client *mdsc, } ci = ceph_inode(in); - has_quota = __ceph_has_any_quota(ci); + switch (which_quota) { + case QUOTA_GET_MAX_BYTES: + has_quota = ci->i_max_bytes; + break; + case QUOTA_GET_MAX_FILES: + has_quota = ci->i_max_files; + break; + default: /* QUOTA_GET_ANY */ + has_quota = __ceph_has_any_quota(ci); + break; + } iput(in); next = realm->parent; @@ -279,8 +297,8 @@ bool ceph_quota_is_same_realm(struct inode *old, struct inode *new) * dropped and we can then restart the whole operation. */ down_read(&mdsc->snap_rwsem); - old_realm = get_quota_realm(mdsc, old, true); - new_realm = get_quota_realm(mdsc, new, false); + old_realm = get_quota_realm(mdsc, old, QUOTA_GET_ANY, true); + new_realm = get_quota_realm(mdsc, new, QUOTA_GET_ANY, false); if (PTR_ERR(new_realm) == -EAGAIN) { up_read(&mdsc->snap_rwsem); if (old_realm) @@ -483,7 +501,8 @@ bool ceph_quota_update_statfs(struct ceph_fs_client *fsc, struct kstatfs *buf) bool is_updated = false; down_read(&mdsc->snap_rwsem); - realm = get_quota_realm(mdsc, d_inode(fsc->sb->s_root), true); + realm = get_quota_realm(mdsc, d_inode(fsc->sb->s_root), + QUOTA_GET_MAX_BYTES, true); up_read(&mdsc->snap_rwsem); if (!realm) return false;