From nobody Fri Sep 12 14:39:23 2025 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 72EAEC61DA4 for ; Thu, 9 Feb 2023 05:18:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229920AbjBIFSw (ORCPT ); Thu, 9 Feb 2023 00:18:52 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60800 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229738AbjBIFSs (ORCPT ); Thu, 9 Feb 2023 00:18:48 -0500 Received: from out30-113.freemail.mail.aliyun.com (out30-113.freemail.mail.aliyun.com [115.124.30.113]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6A0AE2CC7A for ; Wed, 8 Feb 2023 21:18:43 -0800 (PST) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R591e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018045170;MF=jefflexu@linux.alibaba.com;NM=1;PH=DS;RN=6;SR=0;TI=SMTPD_---0VbEauiy_1675919919; Received: from localhost(mailfrom:jefflexu@linux.alibaba.com fp:SMTPD_---0VbEauiy_1675919919) by smtp.aliyun-inc.com; Thu, 09 Feb 2023 13:18:39 +0800 From: Jingbo Xu To: xiang@kernel.org, chao@kernel.org, linux-erofs@lists.ozlabs.org, zhujia.zj@bytedance.com Cc: huyue2@coolpad.com, linux-kernel@vger.kernel.org Subject: [PATCH v2 1/4] erofs: remove unused device mapping in meta routine Date: Thu, 9 Feb 2023 13:18:35 +0800 Message-Id: <20230209051838.33297-2-jefflexu@linux.alibaba.com> X-Mailer: git-send-email 2.19.1.6.gb485710b In-Reply-To: <20230209051838.33297-1-jefflexu@linux.alibaba.com> References: <20230209051838.33297-1-jefflexu@linux.alibaba.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Currently metadata is always on bootstrap, and thus device mapping is not needed so far. Remove the redundant device mapping in the meta routine. Signed-off-by: Jingbo Xu Reviewed-by: Jia Zhu --- fs/erofs/fscache.c | 17 ++++------------- 1 file changed, 4 insertions(+), 13 deletions(-) diff --git a/fs/erofs/fscache.c b/fs/erofs/fscache.c index 014e20962376..03de4dc99302 100644 --- a/fs/erofs/fscache.c +++ b/fs/erofs/fscache.c @@ -164,18 +164,8 @@ static int erofs_fscache_read_folios_async(struct fsca= che_cookie *cookie, static int erofs_fscache_meta_read_folio(struct file *data, struct folio *= folio) { int ret; - struct super_block *sb =3D folio_mapping(folio)->host->i_sb; + struct erofs_fscache *ctx =3D folio_mapping(folio)->host->i_private; struct erofs_fscache_request *req; - struct erofs_map_dev mdev =3D { - .m_deviceid =3D 0, - .m_pa =3D folio_pos(folio), - }; - - ret =3D erofs_map_dev(sb, &mdev); - if (ret) { - folio_unlock(folio); - return ret; - } =20 req =3D erofs_fscache_req_alloc(folio_mapping(folio), folio_pos(folio), folio_size(folio)); @@ -184,8 +174,8 @@ static int erofs_fscache_meta_read_folio(struct file *d= ata, struct folio *folio) return PTR_ERR(req); } =20 - ret =3D erofs_fscache_read_folios_async(mdev.m_fscache->cookie, - req, mdev.m_pa, folio_size(folio)); + ret =3D erofs_fscache_read_folios_async(ctx->cookie, req, + folio_pos(folio), folio_size(folio)); if (ret) req->error =3D ret; =20 @@ -469,6 +459,7 @@ struct erofs_fscache *erofs_fscache_acquire_cookie(stru= ct super_block *sb, inode->i_size =3D OFFSET_MAX; inode->i_mapping->a_ops =3D &erofs_fscache_meta_aops; mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS); + inode->i_private =3D ctx; =20 ctx->inode =3D inode; } --=20 2.19.1.6.gb485710b From nobody Fri Sep 12 14:39:23 2025 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 CC54DC636D3 for ; Thu, 9 Feb 2023 05:18:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230122AbjBIFSz (ORCPT ); Thu, 9 Feb 2023 00:18:55 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60798 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229739AbjBIFSs (ORCPT ); Thu, 9 Feb 2023 00:18:48 -0500 Received: from out30-111.freemail.mail.aliyun.com (out30-111.freemail.mail.aliyun.com [115.124.30.111]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C20C42CFF5 for ; Wed, 8 Feb 2023 21:18:42 -0800 (PST) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R191e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018046059;MF=jefflexu@linux.alibaba.com;NM=1;PH=DS;RN=6;SR=0;TI=SMTPD_---0VbEc.CR_1675919919; Received: from localhost(mailfrom:jefflexu@linux.alibaba.com fp:SMTPD_---0VbEc.CR_1675919919) by smtp.aliyun-inc.com; Thu, 09 Feb 2023 13:18:40 +0800 From: Jingbo Xu To: xiang@kernel.org, chao@kernel.org, linux-erofs@lists.ozlabs.org, zhujia.zj@bytedance.com Cc: huyue2@coolpad.com, linux-kernel@vger.kernel.org Subject: [PATCH v2 2/4] erofs: maintain cookies of share domain in self-contained list Date: Thu, 9 Feb 2023 13:18:36 +0800 Message-Id: <20230209051838.33297-3-jefflexu@linux.alibaba.com> X-Mailer: git-send-email 2.19.1.6.gb485710b In-Reply-To: <20230209051838.33297-1-jefflexu@linux.alibaba.com> References: <20230209051838.33297-1-jefflexu@linux.alibaba.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" We'd better not touch sb->s_inodes list and inode->i_count directly. Let's maintain cookies of share domain in a self-contained list in erofs. Besides, relinquish cookie with the mutex held. Otherwise if a cookie is registered when the old cookie with the same name in the same domain has been removed from the list but not relinquished yet, fscache may complain "Duplicate cookie detected". Signed-off-by: Jingbo Xu Reviewed-by: Jia Zhu --- fs/erofs/fscache.c | 48 ++++++++++++++++++++++----------------------- fs/erofs/internal.h | 4 ++++ 2 files changed, 27 insertions(+), 25 deletions(-) diff --git a/fs/erofs/fscache.c b/fs/erofs/fscache.c index 03de4dc99302..2f5930e177cc 100644 --- a/fs/erofs/fscache.c +++ b/fs/erofs/fscache.c @@ -7,8 +7,11 @@ #include "internal.h" =20 static DEFINE_MUTEX(erofs_domain_list_lock); -static DEFINE_MUTEX(erofs_domain_cookies_lock); static LIST_HEAD(erofs_domain_list); + +static DEFINE_MUTEX(erofs_domain_cookies_lock); +static LIST_HEAD(erofs_domain_cookies_list); + static struct vfsmount *erofs_pseudo_mnt; =20 struct erofs_fscache_request { @@ -318,8 +321,6 @@ const struct address_space_operations erofs_fscache_acc= ess_aops =3D { =20 static void erofs_fscache_domain_put(struct erofs_domain *domain) { - if (!domain) - return; mutex_lock(&erofs_domain_list_lock); if (refcount_dec_and_test(&domain->ref)) { list_del(&domain->list); @@ -434,6 +435,8 @@ struct erofs_fscache *erofs_fscache_acquire_cookie(stru= ct super_block *sb, ctx =3D kzalloc(sizeof(*ctx), GFP_KERNEL); if (!ctx) return ERR_PTR(-ENOMEM); + INIT_LIST_HEAD(&ctx->node); + refcount_set(&ctx->ref, 1); =20 cookie =3D fscache_acquire_cookie(volume, FSCACHE_ADV_WANT_CACHE_SIZE, name, strlen(name), NULL, 0, 0); @@ -479,6 +482,7 @@ static void erofs_fscache_relinquish_cookie(struct erof= s_fscache *ctx) fscache_unuse_cookie(ctx->cookie, NULL, NULL); fscache_relinquish_cookie(ctx->cookie, false); iput(ctx->inode); + iput(ctx->anon_inode); kfree(ctx->name); kfree(ctx); } @@ -511,6 +515,7 @@ struct erofs_fscache *erofs_fscache_domain_init_cookie(= struct super_block *sb, =20 ctx->domain =3D domain; ctx->anon_inode =3D inode; + list_add(&ctx->node, &erofs_domain_cookies_list); inode->i_private =3D ctx; refcount_inc(&domain->ref); return ctx; @@ -524,29 +529,23 @@ struct erofs_fscache *erofs_domain_register_cookie(st= ruct super_block *sb, char *name, unsigned int flags) { - struct inode *inode; struct erofs_fscache *ctx; struct erofs_domain *domain =3D EROFS_SB(sb)->domain; - struct super_block *psb =3D erofs_pseudo_mnt->mnt_sb; =20 mutex_lock(&erofs_domain_cookies_lock); - spin_lock(&psb->s_inode_list_lock); - list_for_each_entry(inode, &psb->s_inodes, i_sb_list) { - ctx =3D inode->i_private; - if (!ctx || ctx->domain !=3D domain || strcmp(ctx->name, name)) + list_for_each_entry(ctx, &erofs_domain_cookies_list, node) { + if (ctx->domain !=3D domain || strcmp(ctx->name, name)) continue; if (!(flags & EROFS_REG_COOKIE_NEED_NOEXIST)) { - igrab(inode); + refcount_inc(&ctx->ref); } else { erofs_err(sb, "%s already exists in domain %s", name, domain->domain_id); ctx =3D ERR_PTR(-EEXIST); } - spin_unlock(&psb->s_inode_list_lock); mutex_unlock(&erofs_domain_cookies_lock); return ctx; } - spin_unlock(&psb->s_inode_list_lock); ctx =3D erofs_fscache_domain_init_cookie(sb, name, flags); mutex_unlock(&erofs_domain_cookies_lock); return ctx; @@ -563,23 +562,22 @@ struct erofs_fscache *erofs_fscache_register_cookie(s= truct super_block *sb, =20 void erofs_fscache_unregister_cookie(struct erofs_fscache *ctx) { - bool drop; - struct erofs_domain *domain; + struct erofs_domain *domain =3D NULL; =20 if (!ctx) return; - domain =3D ctx->domain; - if (domain) { - mutex_lock(&erofs_domain_cookies_lock); - drop =3D atomic_read(&ctx->anon_inode->i_count) =3D=3D 1; - iput(ctx->anon_inode); - mutex_unlock(&erofs_domain_cookies_lock); - if (!drop) - return; - } + if (!ctx->domain) + return erofs_fscache_relinquish_cookie(ctx); =20 - erofs_fscache_relinquish_cookie(ctx); - erofs_fscache_domain_put(domain); + mutex_lock(&erofs_domain_cookies_lock); + if (refcount_dec_and_test(&ctx->ref)) { + domain =3D ctx->domain; + list_del(&ctx->node); + erofs_fscache_relinquish_cookie(ctx); + } + mutex_unlock(&erofs_domain_cookies_lock); + if (domain) + erofs_fscache_domain_put(domain); } =20 int erofs_fscache_register_fs(struct super_block *sb) diff --git a/fs/erofs/internal.h b/fs/erofs/internal.h index 48a2f33de15a..8358cf5f731e 100644 --- a/fs/erofs/internal.h +++ b/fs/erofs/internal.h @@ -109,7 +109,11 @@ struct erofs_fscache { struct fscache_cookie *cookie; struct inode *inode; struct inode *anon_inode; + + /* used for share domain mode */ struct erofs_domain *domain; + struct list_head node; + refcount_t ref; char *name; }; =20 --=20 2.19.1.6.gb485710b From nobody Fri Sep 12 14:39:23 2025 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 83CFCC61DA4 for ; Thu, 9 Feb 2023 05:19:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230182AbjBIFTF (ORCPT ); Thu, 9 Feb 2023 00:19:05 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60804 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229743AbjBIFSu (ORCPT ); Thu, 9 Feb 2023 00:18:50 -0500 Received: from out30-112.freemail.mail.aliyun.com (out30-112.freemail.mail.aliyun.com [115.124.30.112]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D92452D15C for ; Wed, 8 Feb 2023 21:18:44 -0800 (PST) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R191e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018045176;MF=jefflexu@linux.alibaba.com;NM=1;PH=DS;RN=6;SR=0;TI=SMTPD_---0VbEaujl_1675919920; Received: from localhost(mailfrom:jefflexu@linux.alibaba.com fp:SMTPD_---0VbEaujl_1675919920) by smtp.aliyun-inc.com; Thu, 09 Feb 2023 13:18:41 +0800 From: Jingbo Xu To: xiang@kernel.org, chao@kernel.org, linux-erofs@lists.ozlabs.org, zhujia.zj@bytedance.com Cc: huyue2@coolpad.com, linux-kernel@vger.kernel.org Subject: [PATCH v2 3/4] erofs: relinquish volume with mutex held Date: Thu, 9 Feb 2023 13:18:37 +0800 Message-Id: <20230209051838.33297-4-jefflexu@linux.alibaba.com> X-Mailer: git-send-email 2.19.1.6.gb485710b In-Reply-To: <20230209051838.33297-1-jefflexu@linux.alibaba.com> References: <20230209051838.33297-1-jefflexu@linux.alibaba.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Relinquish fscache volume with mutex held. Otherwise if a new domain is registered when the old domain with the same name gets removed from the list but not relinquished yet, fscache may complain the collision. Signed-off-by: Jingbo Xu Reviewed-by: Jia Zhu --- fs/erofs/fscache.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/erofs/fscache.c b/fs/erofs/fscache.c index 2f5930e177cc..a6f030966147 100644 --- a/fs/erofs/fscache.c +++ b/fs/erofs/fscache.c @@ -328,8 +328,8 @@ static void erofs_fscache_domain_put(struct erofs_domai= n *domain) kern_unmount(erofs_pseudo_mnt); erofs_pseudo_mnt =3D NULL; } - mutex_unlock(&erofs_domain_list_lock); fscache_relinquish_volume(domain->volume, NULL, false); + mutex_unlock(&erofs_domain_list_lock); kfree(domain->domain_id); kfree(domain); return; --=20 2.19.1.6.gb485710b From nobody Fri Sep 12 14:39:23 2025 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 ACC75C636D3 for ; Thu, 9 Feb 2023 05:19:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229707AbjBIFTC (ORCPT ); Thu, 9 Feb 2023 00:19:02 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60806 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229765AbjBIFSu (ORCPT ); Thu, 9 Feb 2023 00:18:50 -0500 Received: from out30-131.freemail.mail.aliyun.com (out30-131.freemail.mail.aliyun.com [115.124.30.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 08ACE2D168 for ; Wed, 8 Feb 2023 21:18:45 -0800 (PST) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R271e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018046050;MF=jefflexu@linux.alibaba.com;NM=1;PH=DS;RN=6;SR=0;TI=SMTPD_---0VbEaZFw_1675919921; Received: from localhost(mailfrom:jefflexu@linux.alibaba.com fp:SMTPD_---0VbEaZFw_1675919921) by smtp.aliyun-inc.com; Thu, 09 Feb 2023 13:18:42 +0800 From: Jingbo Xu To: xiang@kernel.org, chao@kernel.org, linux-erofs@lists.ozlabs.org, zhujia.zj@bytedance.com Cc: huyue2@coolpad.com, linux-kernel@vger.kernel.org Subject: [PATCH v2 4/4] erofs: unify anonymous inodes for blob Date: Thu, 9 Feb 2023 13:18:38 +0800 Message-Id: <20230209051838.33297-5-jefflexu@linux.alibaba.com> X-Mailer: git-send-email 2.19.1.6.gb485710b In-Reply-To: <20230209051838.33297-1-jefflexu@linux.alibaba.com> References: <20230209051838.33297-1-jefflexu@linux.alibaba.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Currently there're two anonymous inodes (inode and anon_inode in struct erofs_fscache) for each blob. The former was introduced as the address_space of page cache for bootstrap. The latter was initially introduced as both the address_space of page cache and also a sentinel in the shared domain. Since now the management of cookies in share domain has been decoupled with the anonymous inode, there's no need to maintain an extra anonymous inode. Let's unify these two anonymous inodes. Besides, in non-share-domain mode only bootstrap will allocate anonymous inode. To simplify the implementation, always allocate anonymous inode for both bootstrap and data blobs. Similarly release anonymous inodes for data blobs when .put_super() is called, or we'll get "VFS: Busy inodes after unmount." warning. Also remove the redundant set_nlink() when initializing the anonymous inode, since i_nlink has already been initialized to 1 when the inode gets allocated. Signed-off-by: Jingbo Xu Reviewed-by: Jia Zhu --- fs/erofs/fscache.c | 85 ++++++++++++++++++--------------------------- fs/erofs/internal.h | 7 ++-- fs/erofs/super.c | 2 ++ 3 files changed, 38 insertions(+), 56 deletions(-) diff --git a/fs/erofs/fscache.c b/fs/erofs/fscache.c index a6f030966147..a9498239163a 100644 --- a/fs/erofs/fscache.c +++ b/fs/erofs/fscache.c @@ -422,14 +422,14 @@ static int erofs_fscache_register_domain(struct super= _block *sb) return err; } =20 -static -struct erofs_fscache *erofs_fscache_acquire_cookie(struct super_block *sb, - char *name, - unsigned int flags) +static struct erofs_fscache *erofs_fscache_acquire_cookie(struct super_blo= ck *sb, + char *name, unsigned int flags) { struct fscache_volume *volume =3D EROFS_SB(sb)->volume; struct erofs_fscache *ctx; struct fscache_cookie *cookie; + struct super_block *isb; + struct inode *inode; int ret; =20 ctx =3D kzalloc(sizeof(*ctx), GFP_KERNEL); @@ -445,33 +445,32 @@ struct erofs_fscache *erofs_fscache_acquire_cookie(st= ruct super_block *sb, ret =3D -EINVAL; goto err; } - fscache_use_cookie(cookie, false); - ctx->cookie =3D cookie; - - if (flags & EROFS_REG_COOKIE_NEED_INODE) { - struct inode *const inode =3D new_inode(sb); - - if (!inode) { - erofs_err(sb, "failed to get anon inode for %s", name); - ret =3D -ENOMEM; - goto err_cookie; - } - - set_nlink(inode, 1); - inode->i_size =3D OFFSET_MAX; - inode->i_mapping->a_ops =3D &erofs_fscache_meta_aops; - mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS); - inode->i_private =3D ctx; =20 - ctx->inode =3D inode; + /* + * Allocate anonymous inode in global pseudo mount for shareable blobs, + * so that they are accessible among erofs fs instances. + */ + isb =3D flags & EROFS_REG_COOKIE_SHARE ? erofs_pseudo_mnt->mnt_sb : sb; + inode =3D new_inode(isb); + if (!inode) { + erofs_err(sb, "failed to get anon inode for %s", name); + ret =3D -ENOMEM; + goto err_cookie; } =20 + inode->i_size =3D OFFSET_MAX; + inode->i_mapping->a_ops =3D &erofs_fscache_meta_aops; + mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS); + inode->i_private =3D ctx; + + ctx->cookie =3D cookie; + ctx->inode =3D inode; return ctx; =20 err_cookie: - fscache_unuse_cookie(ctx->cookie, NULL, NULL); - fscache_relinquish_cookie(ctx->cookie, false); + fscache_unuse_cookie(cookie, NULL, NULL); + fscache_relinquish_cookie(cookie, false); err: kfree(ctx); return ERR_PTR(ret); @@ -482,18 +481,13 @@ static void erofs_fscache_relinquish_cookie(struct er= ofs_fscache *ctx) fscache_unuse_cookie(ctx->cookie, NULL, NULL); fscache_relinquish_cookie(ctx->cookie, false); iput(ctx->inode); - iput(ctx->anon_inode); kfree(ctx->name); kfree(ctx); } =20 -static -struct erofs_fscache *erofs_fscache_domain_init_cookie(struct super_block = *sb, - char *name, - unsigned int flags) +static struct erofs_fscache *erofs_domain_init_cookie(struct super_block *= sb, + char *name, unsigned int flags) { - int err; - struct inode *inode; struct erofs_fscache *ctx; struct erofs_domain *domain =3D EROFS_SB(sb)->domain; =20 @@ -503,35 +497,23 @@ struct erofs_fscache *erofs_fscache_domain_init_cooki= e(struct super_block *sb, =20 ctx->name =3D kstrdup(name, GFP_KERNEL); if (!ctx->name) { - err =3D -ENOMEM; - goto out; - } - - inode =3D new_inode(erofs_pseudo_mnt->mnt_sb); - if (!inode) { - err =3D -ENOMEM; - goto out; + erofs_fscache_relinquish_cookie(ctx); + return ERR_PTR(-ENOMEM); } =20 + refcount_inc(&domain->ref); ctx->domain =3D domain; - ctx->anon_inode =3D inode; list_add(&ctx->node, &erofs_domain_cookies_list); - inode->i_private =3D ctx; - refcount_inc(&domain->ref); return ctx; -out: - erofs_fscache_relinquish_cookie(ctx); - return ERR_PTR(err); } =20 -static -struct erofs_fscache *erofs_domain_register_cookie(struct super_block *sb, - char *name, - unsigned int flags) +static struct erofs_fscache *erofs_domain_register_cookie(struct super_blo= ck *sb, + char *name, unsigned int flags) { struct erofs_fscache *ctx; struct erofs_domain *domain =3D EROFS_SB(sb)->domain; =20 + flags |=3D EROFS_REG_COOKIE_SHARE; mutex_lock(&erofs_domain_cookies_lock); list_for_each_entry(ctx, &erofs_domain_cookies_list, node) { if (ctx->domain !=3D domain || strcmp(ctx->name, name)) @@ -546,7 +528,7 @@ struct erofs_fscache *erofs_domain_register_cookie(stru= ct super_block *sb, mutex_unlock(&erofs_domain_cookies_lock); return ctx; } - ctx =3D erofs_fscache_domain_init_cookie(sb, name, flags); + ctx =3D erofs_domain_init_cookie(sb, name, flags); mutex_unlock(&erofs_domain_cookies_lock); return ctx; } @@ -585,7 +567,7 @@ int erofs_fscache_register_fs(struct super_block *sb) int ret; struct erofs_sb_info *sbi =3D EROFS_SB(sb); struct erofs_fscache *fscache; - unsigned int flags; + unsigned int flags =3D 0; =20 if (sbi->domain_id) ret =3D erofs_fscache_register_domain(sb); @@ -604,7 +586,6 @@ int erofs_fscache_register_fs(struct super_block *sb) * * Acquired domain/volume will be relinquished in kill_sb() on error. */ - flags =3D EROFS_REG_COOKIE_NEED_INODE; if (sbi->domain_id) flags |=3D EROFS_REG_COOKIE_NEED_NOEXIST; fscache =3D erofs_fscache_register_cookie(sb, sbi->fsid, flags); diff --git a/fs/erofs/internal.h b/fs/erofs/internal.h index 8358cf5f731e..50cd257d04e3 100644 --- a/fs/erofs/internal.h +++ b/fs/erofs/internal.h @@ -107,8 +107,7 @@ struct erofs_domain { =20 struct erofs_fscache { struct fscache_cookie *cookie; - struct inode *inode; - struct inode *anon_inode; + struct inode *inode; /* anonymous indoe for the blob */ =20 /* used for share domain mode */ struct erofs_domain *domain; @@ -450,8 +449,8 @@ extern const struct file_operations erofs_dir_fops; extern const struct iomap_ops z_erofs_iomap_report_ops; =20 /* flags for erofs_fscache_register_cookie() */ -#define EROFS_REG_COOKIE_NEED_INODE 1 -#define EROFS_REG_COOKIE_NEED_NOEXIST 2 +#define EROFS_REG_COOKIE_SHARE 0x0001 +#define EROFS_REG_COOKIE_NEED_NOEXIST 0x0002 =20 void erofs_unmap_metabuf(struct erofs_buf *buf); void erofs_put_metabuf(struct erofs_buf *buf); diff --git a/fs/erofs/super.c b/fs/erofs/super.c index 715efa94eed4..19b1ae79cec4 100644 --- a/fs/erofs/super.c +++ b/fs/erofs/super.c @@ -968,6 +968,8 @@ static void erofs_put_super(struct super_block *sb) iput(sbi->packed_inode); sbi->packed_inode =3D NULL; #endif + erofs_free_dev_context(sbi->devs); + sbi->devs =3D NULL; erofs_fscache_unregister_fs(sb); } =20 --=20 2.19.1.6.gb485710b