From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E44CD4C6D; Tue, 26 Aug 2025 13:16:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756214206; cv=none; b=dTSPzaCfv6DJ1bBftWR3o7Z7v8TW69Mf2ZhN4ysumsTI6DIIu6KHr3Qw0IGQHnQESiKGZnO9v5zl9V2KPWtioZ8N7iDun8vxVI0inVHTj0wuS1cvKIuAUrNNb3PYQwrsxFkN3hGRXMKfPjfAJa98naQh17txyf/GK77qDlFb+qQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756214206; c=relaxed/simple; bh=zvJBujUZBtBRPIxoB0pqE6jr2htalqQENW9TuhkO798=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=pQvlMMGsgC92rzPZanvcCnIrvkf4zhbYYQ3aEu3cb7tqbwjRF27G/G4mocS06xeYlcU1M9mjy5+ZvwTFGW5GedNGG2hENbmZ8NRNkhW+V85jnCkCM4BX2MgWhVP/SlltPdM5n/VKR0JpvYx6yEZ+q3+AgS4jDsirOcSX4tEY5sE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=ctyN9GEz; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="ctyN9GEz" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2849DC4CEF1; Tue, 26 Aug 2025 13:16:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1756214205; bh=zvJBujUZBtBRPIxoB0pqE6jr2htalqQENW9TuhkO798=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ctyN9GEzFkyo71z+Pc9YjmtZzBLuRTKQsAVhGWl3pBLQyfgzrVa+ayxrH4I8PdRF7 bmdtBOz+HTgeRsvFDZfIHRPdTMLeIdPPCVy/bYj/F7iVjA3ur4Z56eqmnSkMi71jVW h2zaOtEZryK4CKYX1++x7UaYZATMR/NFwE0F/jzs= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Benjamin Coddington , Trond Myklebust Subject: [PATCH 6.1 018/482] NFS: Fix the setting of capabilities when automounting a new filesystem Date: Tue, 26 Aug 2025 13:04:31 +0200 Message-ID: <20250826110931.239422598@linuxfoundation.org> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250826110930.769259449@linuxfoundation.org> References: <20250826110930.769259449@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Trond Myklebust commit b01f21cacde9f2878492cf318fee61bf4ccad323 upstream. Capabilities cannot be inherited when we cross into a new filesystem. They need to be reset to the minimal defaults, and then probed for again. Fixes: 54ceac451598 ("NFS: Share NFS superblocks per-protocol per-server per-FSID") Cc: stable@vger.kernel.org Reviewed-by: Benjamin Coddington Signed-off-by: Trond Myklebust Signed-off-by: Greg Kroah-Hartman --- fs/nfs/client.c | 44 ++++++++++++++++++++++++++++++++++++++++++-- fs/nfs/internal.h | 2 +- fs/nfs/nfs4client.c | 20 +------------------- fs/nfs/nfs4proc.c | 2 +- 4 files changed, 45 insertions(+), 23 deletions(-) --- a/fs/nfs/client.c +++ b/fs/nfs/client.c @@ -657,6 +657,44 @@ struct nfs_client *nfs_init_client(struc } EXPORT_SYMBOL_GPL(nfs_init_client); +static void nfs4_server_set_init_caps(struct nfs_server *server) +{ +#if IS_ENABLED(CONFIG_NFS_V4) + /* Set the basic capabilities */ + server->caps = server->nfs_client->cl_mvops->init_caps; + if (server->flags & NFS_MOUNT_NORDIRPLUS) + server->caps &= ~NFS_CAP_READDIRPLUS; + if (server->nfs_client->cl_proto == XPRT_TRANSPORT_RDMA) + server->caps &= ~NFS_CAP_READ_PLUS; + + /* + * Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower + * authentication. + */ + if (nfs4_disable_idmapping && + server->client->cl_auth->au_flavor == RPC_AUTH_UNIX) + server->caps |= NFS_CAP_UIDGID_NOMAP; +#endif +} + +void nfs_server_set_init_caps(struct nfs_server *server) +{ + switch (server->nfs_client->rpc_ops->version) { + case 2: + server->caps = NFS_CAP_HARDLINKS | NFS_CAP_SYMLINKS; + break; + case 3: + server->caps = NFS_CAP_HARDLINKS | NFS_CAP_SYMLINKS; + if (!(server->flags & NFS_MOUNT_NORDIRPLUS)) + server->caps |= NFS_CAP_READDIRPLUS; + break; + default: + nfs4_server_set_init_caps(server); + break; + } +} +EXPORT_SYMBOL_GPL(nfs_server_set_init_caps); + /* * Create a version 2 or 3 client */ @@ -695,7 +733,6 @@ static int nfs_init_server(struct nfs_se /* Initialise the client representation from the mount data */ server->flags = ctx->flags; server->options = ctx->options; - server->caps |= NFS_CAP_HARDLINKS | NFS_CAP_SYMLINKS; switch (clp->rpc_ops->version) { case 2: @@ -731,6 +768,8 @@ static int nfs_init_server(struct nfs_se if (error < 0) goto error; + nfs_server_set_init_caps(server); + /* Preserve the values of mount_server-related mount options */ if (ctx->mount_server.addrlen) { memcpy(&server->mountd_address, &ctx->mount_server.address, @@ -905,7 +944,6 @@ void nfs_server_copy_userdata(struct nfs target->acregmax = source->acregmax; target->acdirmin = source->acdirmin; target->acdirmax = source->acdirmax; - target->caps = source->caps; target->options = source->options; target->auth_info = source->auth_info; target->port = source->port; @@ -1112,6 +1150,8 @@ struct nfs_server *nfs_clone_server(stru if (error < 0) goto out_free_server; + nfs_server_set_init_caps(server); + /* probe the filesystem info for this server filesystem */ error = nfs_probe_server(server, fh); if (error < 0) --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -219,7 +219,7 @@ extern struct nfs_client * nfs4_find_client_sessionid(struct net *, const struct sockaddr *, struct nfs4_sessionid *, u32); extern struct nfs_server *nfs_create_server(struct fs_context *); -extern void nfs4_server_set_init_caps(struct nfs_server *); +extern void nfs_server_set_init_caps(struct nfs_server *); extern struct nfs_server *nfs4_create_server(struct fs_context *); extern struct nfs_server *nfs4_create_referral_server(struct fs_context *); extern int nfs4_update_server(struct nfs_server *server, const char *hostname, --- a/fs/nfs/nfs4client.c +++ b/fs/nfs/nfs4client.c @@ -1065,24 +1065,6 @@ static void nfs4_session_limit_xasize(st #endif } -void nfs4_server_set_init_caps(struct nfs_server *server) -{ - /* Set the basic capabilities */ - server->caps |= server->nfs_client->cl_mvops->init_caps; - if (server->flags & NFS_MOUNT_NORDIRPLUS) - server->caps &= ~NFS_CAP_READDIRPLUS; - if (server->nfs_client->cl_proto == XPRT_TRANSPORT_RDMA) - server->caps &= ~NFS_CAP_READ_PLUS; - - /* - * Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower - * authentication. - */ - if (nfs4_disable_idmapping && - server->client->cl_auth->au_flavor == RPC_AUTH_UNIX) - server->caps |= NFS_CAP_UIDGID_NOMAP; -} - static int nfs4_server_common_setup(struct nfs_server *server, struct nfs_fh *mntfh, bool auth_probe) { @@ -1097,7 +1079,7 @@ static int nfs4_server_common_setup(stru if (error < 0) goto out; - nfs4_server_set_init_caps(server); + nfs_server_set_init_caps(server); /* Probe the root fh to retrieve its FSID and filehandle */ error = nfs4_get_rootfh(server, mntfh, auth_probe); --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -3957,7 +3957,7 @@ int nfs4_server_capabilities(struct nfs_ }; int err; - nfs4_server_set_init_caps(server); + nfs_server_set_init_caps(server); do { err = nfs4_handle_exception(server, _nfs4_server_capabilities(server, fhandle),