From nobody Mon Dec 1 22:35:05 2025 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (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 A75D3303CAE for ; Mon, 1 Dec 2025 09:49:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764582600; cv=none; b=HWWlyDtsMb63wkSNQmZpIwQ2i88xYMEgpvP4d/1BmL4hNzsJ5aTTa+oHGHQc1mIhNWr+5ruzQDyVb5TO8ogFwdCo12/bFSJM4z5PLDafZMCEZUb4j1qkVbGjViSl+zf0Ub9Mu86ZfzBc8ADG6Ge4CuucmsavVH8SRltJSRjh01c= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764582600; c=relaxed/simple; bh=sdrzWvqi3YjMnIdhXb6Wzjb526eGp8BJFydmdRcJl5o=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=B6D4oow3BrZ1wQvCGwEbtbNpPtkmYmx3QSA6EkvkmI1P0J9jaHrAcSChIoApFhwzsN3JocmEU7o6dJFYFV6F5Ns3mZK7p3jIc1njWXCvS4w3GpsCtDr8mxR2pEwRJqomxiO1EVSYkdUNMv5fmo1EyOZgus3dqBnsVVrbdFMtn80= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=iPxKgbTH; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="iPxKgbTH" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1764582595; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=OrVRlUg3jci14tUOesgM+TBBkZ1+rQ+qHu4R1A4jvLY=; b=iPxKgbTHwV1CvKSCYFtdB6XVhEJfqiHGQt1Ir1EKBdsJkh0XQlHZHgVZXMdK4F09hapvkC 5e6o6+irRIDoaWiRhhsKs4MApp1DkSZVdjVxkfAKF7MIvGkJfOQpeRaM6Y7yBXDoM2fkhB 6rvQEBtKfraQoP1occKlK+bU0gtdryc= Received: from mx-prod-mc-01.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-650-YlHaLBRxNAerrOfzCaQXsA-1; Mon, 01 Dec 2025 04:49:52 -0500 X-MC-Unique: YlHaLBRxNAerrOfzCaQXsA-1 X-Mimecast-MFC-AGG-ID: YlHaLBRxNAerrOfzCaQXsA_1764582590 Received: from mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.4]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 37F9419560AD; Mon, 1 Dec 2025 09:49:50 +0000 (UTC) Received: from warthog.procyon.org.com (unknown [10.42.28.14]) by mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 4173730001A4; Mon, 1 Dec 2025 09:49:47 +0000 (UTC) From: David Howells To: Steve French Cc: David Howells , Paulo Alcantara , Shyam Prasad N , Stefan Metzmacher , linux-cifs@vger.kernel.org, netfs@lists.linux.dev, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, Tom Talpey Subject: [PATCH v5 6/9] cifs: Remove the server pointer from smb_message Date: Mon, 1 Dec 2025 09:49:10 +0000 Message-ID: <20251201094916.1418415-7-dhowells@redhat.com> In-Reply-To: <20251201094916.1418415-1-dhowells@redhat.com> References: <20251201094916.1418415-1-dhowells@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 Content-Type: text/plain; charset="utf-8" Remove the server pointer from smb_message and instead pass it down to all the things that access it. Signed-off-by: David Howells cc: Steve French cc: Paulo Alcantara cc: Shyam Prasad N cc: Tom Talpey (RDMA, smbdirect) cc: linux-cifs@vger.kernel.org cc: netfs@lists.linux.dev cc: linux-fsdevel@vger.kernel.org --- fs/smb/client/cifsglob.h | 10 ++++---- fs/smb/client/cifsproto.h | 21 +++++++++++------ fs/smb/client/cifssmb.c | 15 +++++------- fs/smb/client/cifstransport.c | 13 +++++------ fs/smb/client/connect.c | 34 +++++++++++++-------------- fs/smb/client/netmisc.c | 5 ++-- fs/smb/client/smb1ops.c | 4 ++-- fs/smb/client/smb2ops.c | 22 +++++++++--------- fs/smb/client/smb2pdu.c | 23 ++++++++---------- fs/smb/client/smb2transport.c | 7 +++--- fs/smb/client/transport.c | 44 ++++++++++++++++------------------- 11 files changed, 97 insertions(+), 101 deletions(-) diff --git a/fs/smb/client/cifsglob.h b/fs/smb/client/cifsglob.h index b3a8fd754d1f..90448d22c234 100644 --- a/fs/smb/client/cifsglob.h +++ b/fs/smb/client/cifsglob.h @@ -1671,7 +1671,7 @@ typedef int (*mid_receive_t)(struct TCP_Server_Info *= server, * - it will be called by cifsd, with no locks held * - the mid will be removed from any lists */ -typedef void (*mid_callback_t)(struct smb_message *smb); +typedef void (*mid_callback_t)(struct TCP_Server_Info *srv, struct smb_mes= sage *smb); =20 /* * This is the protopyte for mid handle function. This is called once the = mid @@ -1683,8 +1683,7 @@ typedef int (*mid_handle_t)(struct TCP_Server_Info *s= erver, /* one of these for every pending CIFS request to the server */ struct smb_message { struct list_head qhead; /* mids waiting on reply from this server */ - struct kref refcount; - struct TCP_Server_Info *server; /* server corresponding to this mid */ + refcount_t refcount; __u64 mid; /* multiplex id */ __u16 credits; /* number of credits consumed by this mid */ __u16 credits_received; /* number of credits from the response */ @@ -2356,7 +2355,8 @@ static inline bool cifs_netbios_name(const char *name= , size_t namelen) * Execute mid callback atomically - ensures callback runs exactly once * and prevents sleeping in atomic context. */ -static inline void mid_execute_callback(struct smb_message *smb) +static inline void mid_execute_callback(struct TCP_Server_Info *server, + struct smb_message *smb) { mid_callback_t callback; =20 @@ -2366,7 +2366,7 @@ static inline void mid_execute_callback(struct smb_me= ssage *smb) spin_unlock(&smb->mid_lock); =20 if (callback) - callback(smb); + callback(server, smb); } =20 #define CIFS_REPARSE_SUPPORT(tcon) \ diff --git a/fs/smb/client/cifsproto.h b/fs/smb/client/cifsproto.h index cacf0bd70fa1..650c09884e71 100644 --- a/fs/smb/client/cifsproto.h +++ b/fs/smb/client/cifsproto.h @@ -82,9 +82,9 @@ extern char *cifs_build_path_to_root(struct smb3_fs_conte= xt *ctx, int add_treename); extern char *build_wildcard_path_from_dentry(struct dentry *direntry); char *cifs_build_devname(char *nodename, const char *prepath); -extern void delete_mid(struct smb_message *smb); -void __release_mid(struct kref *refcount); -extern void cifs_wake_up_task(struct smb_message *smb); +extern void delete_mid(struct TCP_Server_Info *server, struct smb_message = *smb); +void __release_mid(struct TCP_Server_Info *server, struct smb_message *smb= ); +extern void cifs_wake_up_task(struct TCP_Server_Info *server, struct smb_m= essage *smb); extern int cifs_handle_standard(struct TCP_Server_Info *server, struct smb_message *smb); extern char *smb3_fs_context_fullpath(const struct smb3_fs_context *ctx, @@ -180,7 +180,8 @@ extern int decode_negTokenInit(unsigned char *security_= blob, int length, extern int cifs_convert_address(struct sockaddr *dst, const char *src, int= len); extern void cifs_set_port(struct sockaddr *addr, const unsigned short int = port); extern int map_smb_to_linux_error(char *buf, bool logErr); -extern int map_and_check_smb_error(struct smb_message *smb, bool logErr); +extern int map_and_check_smb_error(struct TCP_Server_Info *server, + struct smb_message *smb, bool logErr); unsigned int header_assemble(struct smb_hdr *buffer, char smb_command, const struct cifs_tcon *treeCon, int word_count /* length of fixed section word count in two byte units */); @@ -263,7 +264,7 @@ extern unsigned int setup_special_mode_ACE(struct smb_a= ce *pace, __u64 nmode); extern unsigned int setup_special_user_owner_ACE(struct smb_ace *pace); =20 -extern void dequeue_mid(struct smb_message *smb, bool malformed); +void dequeue_mid(struct TCP_Server_Info *server, struct smb_message *smb, = bool malformed); extern int cifs_read_from_socket(struct TCP_Server_Info *server, char *buf, unsigned int to_read); extern ssize_t cifs_discard_from_socket(struct TCP_Server_Info *server, @@ -767,9 +768,15 @@ static inline bool dfs_src_pathname_equal(const char *= s1, const char *s2) return true; } =20 -static inline void release_mid(struct smb_message *smb) +static inline void smb_get_mid(struct smb_message *smb) { - kref_put(&smb->refcount, __release_mid); + refcount_inc(&smb->refcount); +} + +static inline void release_mid(struct TCP_Server_Info *server, struct smb_= message *smb) +{ + if (refcount_dec_and_test(&smb->refcount)) + __release_mid(server, smb); } =20 static inline void cifs_free_open_info(struct cifs_open_info_data *data) diff --git a/fs/smb/client/cifssmb.c b/fs/smb/client/cifssmb.c index c1523bd60fad..aae914c579b8 100644 --- a/fs/smb/client/cifssmb.c +++ b/fs/smb/client/cifssmb.c @@ -584,12 +584,11 @@ CIFSSMBTDis(const unsigned int xid, struct cifs_tcon = *tcon) * FIXME: maybe we should consider checking that the reply matches request? */ static void -cifs_echo_callback(struct smb_message *smb) +cifs_echo_callback(struct TCP_Server_Info *server, struct smb_message *smb) { - struct TCP_Server_Info *server =3D smb->callback_data; struct cifs_credits credits =3D { .value =3D 1, .instance =3D 0 }; =20 - release_mid(smb); + release_mid(server, smb); add_credits(server, &credits, CIFS_ECHO_OP); } =20 @@ -1317,12 +1316,11 @@ CIFS_open(const unsigned int xid, struct cifs_open_= parms *oparms, int *oplock, } =20 static void -cifs_readv_callback(struct smb_message *smb) +cifs_readv_callback(struct TCP_Server_Info *server, struct smb_message *sm= b) { struct cifs_io_subrequest *rdata =3D smb->callback_data; struct netfs_inode *ictx =3D netfs_inode(rdata->rreq->inode); struct cifs_tcon *tcon =3D tlink_tcon(rdata->req->cfile->tlink); - struct TCP_Server_Info *server =3D tcon->ses->server; struct smb_rqst rqst =3D { .rq_iov =3D rdata->iov, .rq_nvec =3D 1, .rq_iter =3D rdata->subreq.io_iter }; @@ -1420,7 +1418,7 @@ cifs_readv_callback(struct smb_message *smb) rdata->subreq.transferred +=3D rdata->got_bytes; trace_netfs_sreq(&rdata->subreq, netfs_sreq_trace_io_progress); netfs_read_subreq_terminated(&rdata->subreq); - release_mid(smb); + release_mid(server, smb); add_credits(server, &credits, 0); trace_smb3_rw_credits(rreq_debug_id, subreq_debug_index, 0, server->credits, server->in_flight, @@ -1736,10 +1734,9 @@ CIFSSMBWrite(const unsigned int xid, struct cifs_io_= parms *io_parms, * workqueue completion task. */ static void -cifs_writev_callback(struct smb_message *smb) +cifs_writev_callback(struct TCP_Server_Info *server, struct smb_message *s= mb) { struct cifs_io_subrequest *wdata =3D smb->callback_data; - struct TCP_Server_Info *server =3D wdata->server; struct cifs_tcon *tcon =3D tlink_tcon(wdata->req->cfile->tlink); WRITE_RSP *rsp =3D (WRITE_RSP *)smb->resp_buf; struct cifs_credits credits =3D { @@ -1803,7 +1800,7 @@ cifs_writev_callback(struct smb_message *smb) 0, cifs_trace_rw_credits_write_response_clear); wdata->credits.value =3D 0; cifs_write_subrequest_terminated(wdata, result); - release_mid(smb); + release_mid(server, smb); trace_smb3_rw_credits(credits.rreq_debug_id, credits.rreq_debug_index, 0, server->credits, server->in_flight, credits.value, cifs_trace_rw_credits_write_response_add); diff --git a/fs/smb/client/cifstransport.c b/fs/smb/client/cifstransport.c index 7ea737fc5127..6b7d4bac8b83 100644 --- a/fs/smb/client/cifstransport.c +++ b/fs/smb/client/cifstransport.c @@ -45,7 +45,7 @@ alloc_mid(const struct smb_hdr *smb_buffer, struct TCP_Se= rver_Info *server) =20 smb =3D mempool_alloc(&smb_message_pool, GFP_NOFS); memset(smb, 0, sizeof(struct smb_message)); - kref_init(&smb->refcount); + refcount_set(&smb->refcount, 1); spin_lock_init(&smb->mid_lock); smb->mid =3D get_mid(smb_buffer); smb->pid =3D current->pid; @@ -54,7 +54,6 @@ alloc_mid(const struct smb_hdr *smb_buffer, struct TCP_Se= rver_Info *server) /* easier to use jiffies */ /* when mid allocated can be before when sent */ smb->when_alloc =3D jiffies; - smb->server =3D server; =20 /* * The default is for the mid to be synchronous, so the @@ -119,7 +118,7 @@ cifs_setup_async_request(struct TCP_Server_Info *server= , struct smb_rqst *rqst) =20 rc =3D cifs_sign_rqst(rqst, server, &smb->sequence_number); if (rc) { - release_mid(smb); + release_mid(server, smb); return ERR_PTR(rc); } =20 @@ -179,11 +178,11 @@ cifs_check_receive(struct smb_message *smb, struct TC= P_Server_Info *server, } =20 /* BB special case reconnect tid and uid here? */ - return map_and_check_smb_error(smb, log_error); + return map_and_check_smb_error(server, smb, log_error); } =20 struct smb_message * -cifs_setup_request(struct cifs_ses *ses, struct TCP_Server_Info *ignored, +cifs_setup_request(struct cifs_ses *ses, struct TCP_Server_Info *server, struct smb_rqst *rqst) { int rc; @@ -193,9 +192,9 @@ cifs_setup_request(struct cifs_ses *ses, struct TCP_Ser= ver_Info *ignored, rc =3D allocate_mid(ses, hdr, &smb); if (rc) return ERR_PTR(rc); - rc =3D cifs_sign_rqst(rqst, ses->server, &smb->sequence_number); + rc =3D cifs_sign_rqst(rqst, server, &smb->sequence_number); if (rc) { - delete_mid(smb); + delete_mid(server, smb); return ERR_PTR(rc); } return smb; diff --git a/fs/smb/client/connect.c b/fs/smb/client/connect.c index d329c55e6c7b..8e3811b50706 100644 --- a/fs/smb/client/connect.c +++ b/fs/smb/client/connect.c @@ -325,7 +325,7 @@ cifs_abort_connection(struct TCP_Server_Info *server) cifs_dbg(FYI, "%s: moving mids to private list\n", __func__); spin_lock(&server->mid_queue_lock); list_for_each_entry_safe(smb, nsmb, &server->pending_mid_q, qhead) { - kref_get(&smb->refcount); + smb_get_mid(smb); if (smb->mid_state =3D=3D MID_REQUEST_SUBMITTED) smb->mid_state =3D MID_RETRY_NEEDED; list_move(&smb->qhead, &retry_list); @@ -337,8 +337,8 @@ cifs_abort_connection(struct TCP_Server_Info *server) cifs_dbg(FYI, "%s: issuing mid callbacks\n", __func__); list_for_each_entry_safe(smb, nsmb, &retry_list, qhead) { list_del_init(&smb->qhead); - mid_execute_callback(smb); - release_mid(smb); + mid_execute_callback(server, smb); + release_mid(server, smb); } } =20 @@ -882,7 +882,7 @@ is_smb_response(struct TCP_Server_Info *server, unsigne= d char type) */ spin_lock(&server->mid_queue_lock); list_for_each_entry_safe(smb, nsmb, &server->pending_mid_q, qhead) { - kref_get(&smb->refcount); + smb_get_mid(smb); list_move(&smb->qhead, &dispose_list); smb->deleted_from_q =3D true; } @@ -915,8 +915,8 @@ is_smb_response(struct TCP_Server_Info *server, unsigne= d char type) list_del_init(&smb->qhead); smb->mid_rc =3D mid_rc; smb->mid_state =3D MID_RC; - mid_execute_callback(smb); - release_mid(smb); + mid_execute_callback(server, smb); + release_mid(server, smb); } =20 /* @@ -948,12 +948,12 @@ is_smb_response(struct TCP_Server_Info *server, unsig= ned char type) } =20 void -dequeue_mid(struct smb_message *smb, bool malformed) +dequeue_mid(struct TCP_Server_Info *server, struct smb_message *smb, bool = malformed) { #ifdef CONFIG_CIFS_STATS2 smb->when_received =3D jiffies; #endif - spin_lock(&smb->server->mid_queue_lock); + spin_lock(&server->mid_queue_lock); if (!malformed) smb->mid_state =3D MID_RESPONSE_RECEIVED; else @@ -963,12 +963,12 @@ dequeue_mid(struct smb_message *smb, bool malformed) * function has finished processing it is a bug. */ if (smb->deleted_from_q) { - spin_unlock(&smb->server->mid_queue_lock); + spin_unlock(&server->mid_queue_lock); pr_warn_once("trying to dequeue a deleted mid\n"); } else { list_del_init(&smb->qhead); smb->deleted_from_q =3D true; - spin_unlock(&smb->server->mid_queue_lock); + spin_unlock(&server->mid_queue_lock); } } =20 @@ -1004,7 +1004,7 @@ handle_mid(struct smb_message *smb, struct TCP_Server= _Info *server, else server->smallbuf =3D NULL; } - dequeue_mid(smb, malformed); + dequeue_mid(server, smb, malformed); } =20 int @@ -1101,7 +1101,7 @@ clean_demultiplex_info(struct TCP_Server_Info *server) list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { smb =3D list_entry(tmp, struct smb_message, qhead); cifs_dbg(FYI, "Clearing mid %llu\n", smb->mid); - kref_get(&smb->refcount); + smb_get_mid(smb); smb->mid_state =3D MID_SHUTDOWN; list_move(&smb->qhead, &dispose_list); smb->deleted_from_q =3D true; @@ -1113,8 +1113,8 @@ clean_demultiplex_info(struct TCP_Server_Info *server) smb =3D list_entry(tmp, struct smb_message, qhead); cifs_dbg(FYI, "Callback mid %llu\n", smb->mid); list_del_init(&smb->qhead); - mid_execute_callback(smb); - release_mid(smb); + mid_execute_callback(server, smb); + release_mid(server, smb); } /* 1/8th of sec is more than enough time for them to exit */ msleep(125); @@ -1355,7 +1355,7 @@ cifs_demultiplex_thread(void *p) if (length < 0) { for (i =3D 0; i < num_smbs; i++) if (smbs[i]) - release_mid(smbs[i]); + release_mid(server, smbs[i]); continue; } =20 @@ -1388,9 +1388,9 @@ cifs_demultiplex_thread(void *p) } =20 if (!smbs[i]->multiRsp || smbs[i]->multiEnd) - mid_execute_callback(smbs[i]); + mid_execute_callback(server, smbs[i]); =20 - release_mid(smbs[i]); + release_mid(server, smbs[i]); } else if (server->ops->is_oplock_break && server->ops->is_oplock_break(bufs[i], server)) { diff --git a/fs/smb/client/netmisc.c b/fs/smb/client/netmisc.c index b34d2b91cf5a..89bd1ca9e3ce 100644 --- a/fs/smb/client/netmisc.c +++ b/fs/smb/client/netmisc.c @@ -889,7 +889,8 @@ map_smb_to_linux_error(char *buf, bool logErr) } =20 int -map_and_check_smb_error(struct smb_message *smb, bool logErr) +map_and_check_smb_error(struct TCP_Server_Info *server, + struct smb_message *smb, bool logErr) { int rc; struct smb_hdr *rhdr =3D (struct smb_hdr *)smb->resp_buf; @@ -904,7 +905,7 @@ map_and_check_smb_error(struct smb_message *smb, bool l= ogErr) if (class =3D=3D ERRSRV && code =3D=3D ERRbaduid) { cifs_dbg(FYI, "Server returned 0x%x, reconnecting session...\n", code); - cifs_signal_cifsd_for_reconnect(smb->server, false); + cifs_signal_cifsd_for_reconnect(server, false); } } =20 diff --git a/fs/smb/client/smb1ops.c b/fs/smb/client/smb1ops.c index fe6c0573fe76..bc179c8ad70d 100644 --- a/fs/smb/client/smb1ops.c +++ b/fs/smb/client/smb1ops.c @@ -145,7 +145,7 @@ cifs_find_mid(struct TCP_Server_Info *server, char *buf= fer) if (compare_mid(smb->mid, buf) && smb->mid_state =3D=3D MID_REQUEST_SUBMITTED && le16_to_cpu(smb->command) =3D=3D buf->Command) { - kref_get(&smb->refcount); + smb_get_mid(smb); spin_unlock(&server->mid_queue_lock); return smb; } @@ -447,7 +447,7 @@ cifs_check_trans2(struct smb_message *smb, struct TCP_S= erver_Info *server, return true; /* All parts received or packet is malformed. */ smb->multiEnd =3D true; - dequeue_mid(smb, malformed); + dequeue_mid(server, smb, malformed); return true; } if (!server->large_buf) { diff --git a/fs/smb/client/smb2ops.c b/fs/smb/client/smb2ops.c index 67212783e329..d19104f99fe4 100644 --- a/fs/smb/client/smb2ops.c +++ b/fs/smb/client/smb2ops.c @@ -406,7 +406,7 @@ __smb2_find_mid(struct TCP_Server_Info *server, char *b= uf, bool dequeue) if ((smb->mid =3D=3D wire_mid) && (smb->mid_state =3D=3D MID_REQUEST_SUBMITTED) && (smb->command =3D=3D shdr->Command)) { - kref_get(&smb->refcount); + smb_get_mid(smb); if (dequeue) { list_del_init(&smb->qhead); smb->deleted_from_q =3D true; @@ -4716,7 +4716,7 @@ handle_read_data(struct TCP_Server_Info *server, stru= ct smb_message *smb, if (is_offloaded) smb->mid_state =3D MID_RESPONSE_RECEIVED; else - dequeue_mid(smb, false); + dequeue_mid(server, smb, false); return 0; } =20 @@ -4743,7 +4743,7 @@ handle_read_data(struct TCP_Server_Info *server, stru= ct smb_message *smb, if (is_offloaded) smb->mid_state =3D MID_RESPONSE_MALFORMED; else - dequeue_mid(smb, rdata->result); + dequeue_mid(server, smb, rdata->result); return 0; } =20 @@ -4762,7 +4762,7 @@ handle_read_data(struct TCP_Server_Info *server, stru= ct smb_message *smb, if (is_offloaded) smb->mid_state =3D MID_RESPONSE_MALFORMED; else - dequeue_mid(smb, rdata->result); + dequeue_mid(server, smb, rdata->result); return 0; } =20 @@ -4772,7 +4772,7 @@ handle_read_data(struct TCP_Server_Info *server, stru= ct smb_message *smb, if (is_offloaded) smb->mid_state =3D MID_RESPONSE_MALFORMED; else - dequeue_mid(smb, rdata->result); + dequeue_mid(server, smb, rdata->result); return 0; } =20 @@ -4783,7 +4783,7 @@ handle_read_data(struct TCP_Server_Info *server, stru= ct smb_message *smb, if (is_offloaded) smb->mid_state =3D MID_RESPONSE_MALFORMED; else - dequeue_mid(smb, rdata->result); + dequeue_mid(server, smb, rdata->result); return 0; } rdata->got_bytes =3D buffer_len; @@ -4802,14 +4802,14 @@ handle_read_data(struct TCP_Server_Info *server, st= ruct smb_message *smb, if (is_offloaded) smb->mid_state =3D MID_RESPONSE_MALFORMED; else - dequeue_mid(smb, rdata->result); + dequeue_mid(server, smb, rdata->result); return 0; } =20 if (is_offloaded) smb->mid_state =3D MID_RESPONSE_RECEIVED; else - dequeue_mid(smb, false); + dequeue_mid(server, smb, false); return 0; } =20 @@ -4856,7 +4856,7 @@ static void smb2_decrypt_offload(struct work_struct *= work) dw->server->ops->is_network_name_deleted(dw->buf, dw->server); =20 - mid_execute_callback(smb); + mid_execute_callback(dw->server, smb); } else { spin_lock(&dw->server->srv_lock); if (dw->server->tcpStatus =3D=3D CifsNeedReconnect) { @@ -4864,7 +4864,7 @@ static void smb2_decrypt_offload(struct work_struct *= work) smb->mid_state =3D MID_RETRY_NEEDED; spin_unlock(&dw->server->mid_queue_lock); spin_unlock(&dw->server->srv_lock); - mid_execute_callback(smb); + mid_execute_callback(dw->server, smb); } else { spin_lock(&dw->server->mid_queue_lock); smb->mid_state =3D MID_REQUEST_SUBMITTED; @@ -4875,7 +4875,7 @@ static void smb2_decrypt_offload(struct work_struct *= work) spin_unlock(&dw->server->srv_lock); } } - release_mid(smb); + release_mid(dw->server, smb); } =20 free_pages: diff --git a/fs/smb/client/smb2pdu.c b/fs/smb/client/smb2pdu.c index 18c7f94d5c74..b5f174b44be0 100644 --- a/fs/smb/client/smb2pdu.c +++ b/fs/smb/client/smb2pdu.c @@ -4091,9 +4091,8 @@ SMB2_change_notify(const unsigned int xid, struct cif= s_tcon *tcon, * FIXME: maybe we should consider checking that the reply matches request? */ static void -smb2_echo_callback(struct smb_message *smb) +smb2_echo_callback(struct TCP_Server_Info *server, struct smb_message *smb) { - struct TCP_Server_Info *server =3D smb->callback_data; struct smb2_echo_rsp *rsp =3D (struct smb2_echo_rsp *)smb->resp_buf; struct cifs_credits credits =3D { .value =3D 0, .instance =3D 0 }; =20 @@ -4103,7 +4102,7 @@ smb2_echo_callback(struct smb_message *smb) credits.instance =3D server->reconnect_instance; } =20 - release_mid(smb); + release_mid(server, smb); add_credits(server, &credits, CIFS_ECHO_OP); } =20 @@ -4518,12 +4517,11 @@ smb2_new_read_req(void **buf, unsigned int *total_l= en, } =20 static void -smb2_readv_callback(struct smb_message *smb) +smb2_readv_callback(struct TCP_Server_Info *server, struct smb_message *sm= b) { struct cifs_io_subrequest *rdata =3D smb->callback_data; struct netfs_inode *ictx =3D netfs_inode(rdata->rreq->inode); struct cifs_tcon *tcon =3D tlink_tcon(rdata->req->cfile->tlink); - struct TCP_Server_Info *server =3D rdata->server; struct smb2_hdr *shdr =3D (struct smb2_hdr *)rdata->iov[0].iov_base; struct cifs_credits credits =3D { .value =3D 0, @@ -4539,9 +4537,9 @@ smb2_readv_callback(struct smb_message *smb) rqst.rq_iter =3D rdata->subreq.io_iter; } =20 - WARN_ONCE(rdata->server !=3D smb->server, + WARN_ONCE(rdata->server !=3D server, "rdata server %p !=3D mid server %p", - rdata->server, smb->server); + rdata->server, server); =20 cifs_dbg(FYI, "%s: mid=3D%llu state=3D%d result=3D%d bytes=3D%zu/%zu\n", __func__, smb->mid, smb->mid_state, rdata->result, @@ -4642,7 +4640,7 @@ smb2_readv_callback(struct smb_message *smb) rdata->subreq.transferred +=3D rdata->got_bytes; trace_netfs_sreq(&rdata->subreq, netfs_sreq_trace_io_progress); netfs_read_subreq_terminated(&rdata->subreq); - release_mid(smb); + release_mid(server, smb); trace_smb3_rw_credits(rreq_debug_id, subreq_debug_index, 0, server->credits, server->in_flight, credits.value, cifs_trace_rw_credits_read_response_add); @@ -4819,11 +4817,10 @@ SMB2_read(const unsigned int xid, struct cifs_io_pa= rms *io_parms, * workqueue completion task. */ static void -smb2_writev_callback(struct smb_message *smb) +smb2_writev_callback(struct TCP_Server_Info *server, struct smb_message *s= mb) { struct cifs_io_subrequest *wdata =3D smb->callback_data; struct cifs_tcon *tcon =3D tlink_tcon(wdata->req->cfile->tlink); - struct TCP_Server_Info *server =3D wdata->server; struct smb2_write_rsp *rsp =3D (struct smb2_write_rsp *)smb->resp_buf; struct cifs_credits credits =3D { .value =3D 0, @@ -4836,9 +4833,9 @@ smb2_writev_callback(struct smb_message *smb) ssize_t result =3D 0; size_t written; =20 - WARN_ONCE(wdata->server !=3D smb->server, + WARN_ONCE(wdata->server !=3D server, "wdata server %p !=3D mid server %p", - wdata->server, smb->server); + wdata->server, server); =20 switch (smb->mid_state) { case MID_RESPONSE_RECEIVED: @@ -4928,7 +4925,7 @@ smb2_writev_callback(struct smb_message *smb) 0, cifs_trace_rw_credits_write_response_clear); wdata->credits.value =3D 0; cifs_write_subrequest_terminated(wdata, result ?: written); - release_mid(smb); + release_mid(server, smb); trace_smb3_rw_credits(rreq_debug_id, subreq_debug_index, 0, server->credits, server->in_flight, credits.value, cifs_trace_rw_credits_write_response_add); diff --git a/fs/smb/client/smb2transport.c b/fs/smb/client/smb2transport.c index 21b027040643..6d76b0c6d73d 100644 --- a/fs/smb/client/smb2transport.c +++ b/fs/smb/client/smb2transport.c @@ -655,14 +655,13 @@ smb2_mid_entry_alloc(const struct smb2_hdr *shdr, =20 smb =3D mempool_alloc(&smb_message_pool, GFP_NOFS); memset(smb, 0, sizeof(*smb)); - kref_init(&smb->refcount); + refcount_set(&smb->refcount, 1); spin_lock_init(&smb->mid_lock); smb->mid =3D le64_to_cpu(shdr->MessageId); smb->credits =3D credits > 0 ? credits : 1; smb->pid =3D current->pid; smb->command =3D shdr->Command; /* Always LE */ smb->when_alloc =3D jiffies; - smb->server =3D server; =20 /* * The default is for the mid to be synchronous, so the @@ -779,7 +778,7 @@ smb2_setup_request(struct cifs_ses *ses, struct TCP_Ser= ver_Info *server, rc =3D smb2_sign_rqst(rqst, server); if (rc) { revert_current_mid_from_hdr(server, shdr); - delete_mid(mid); + delete_mid(server, mid); return ERR_PTR(rc); } =20 @@ -813,7 +812,7 @@ smb2_setup_async_request(struct TCP_Server_Info *server= , struct smb_rqst *rqst) rc =3D smb2_sign_rqst(rqst, server); if (rc) { revert_current_mid_from_hdr(server, shdr); - release_mid(smb); + release_mid(server, smb); return ERR_PTR(rc); } =20 diff --git a/fs/smb/client/transport.c b/fs/smb/client/transport.c index 5c4cc7015d2e..80eb33a75d79 100644 --- a/fs/smb/client/transport.c +++ b/fs/smb/client/transport.c @@ -32,24 +32,21 @@ #include "compress.h" =20 void -cifs_wake_up_task(struct smb_message *smb) +cifs_wake_up_task(struct TCP_Server_Info *server, struct smb_message *smb) { if (smb->mid_state =3D=3D MID_RESPONSE_RECEIVED) smb->mid_state =3D MID_RESPONSE_READY; wake_up_process(smb->callback_data); } =20 -void __release_mid(struct kref *refcount) +void __release_mid(struct TCP_Server_Info *server, struct smb_message *smb) { - struct smb_message *smb =3D - container_of(refcount, struct smb_message, refcount); #ifdef CONFIG_CIFS_STATS2 - __le16 command =3D smb->server->vals->lock_cmd; + __le16 command =3D server->vals->lock_cmd; __u16 smb_cmd =3D le16_to_cpu(smb->command); unsigned long now; unsigned long roundtrip_time; #endif - struct TCP_Server_Info *server =3D smb->server; =20 if (smb->resp_buf && smb->wait_cancelled && (smb->mid_state =3D=3D MID_RESPONSE_RECEIVED || @@ -120,17 +117,17 @@ void __release_mid(struct kref *refcount) } =20 void -delete_mid(struct smb_message *smb) +delete_mid(struct TCP_Server_Info *server, struct smb_message *smb) { - spin_lock(&smb->server->mid_queue_lock); + spin_lock(&server->mid_queue_lock); =20 if (!smb->deleted_from_q) { list_del_init(&smb->qhead); smb->deleted_from_q =3D true; } - spin_unlock(&smb->server->mid_queue_lock); + spin_unlock(&server->mid_queue_lock); =20 - release_mid(smb); + release_mid(server, smb); } =20 /* @@ -728,7 +725,7 @@ cifs_call_async(struct TCP_Server_Info *server, struct = smb_rqst *rqst, if (rc < 0) { revert_current_mid(server, smb->credits); server->sequence_number -=3D 2; - delete_mid(smb); + delete_mid(server, smb); } =20 cifs_server_unlock(server); @@ -778,14 +775,13 @@ int cifs_sync_mid_result(struct smb_message *smb, str= uct TCP_Server_Info *server spin_unlock(&server->mid_queue_lock); =20 sync_mid_done: - release_mid(smb); + release_mid(server, smb); return rc; } =20 static void -cifs_compound_callback(struct smb_message *smb) +cifs_compound_callback(struct TCP_Server_Info *server, struct smb_message = *smb) { - struct TCP_Server_Info *server =3D smb->server; struct cifs_credits credits =3D { .value =3D server->ops->get_credits(smb), .instance =3D server->reconnect_instance, @@ -798,17 +794,17 @@ cifs_compound_callback(struct smb_message *smb) } =20 static void -cifs_compound_last_callback(struct smb_message *smb) +cifs_compound_last_callback(struct TCP_Server_Info *server, struct smb_mes= sage *smb) { - cifs_compound_callback(smb); - cifs_wake_up_task(smb); + cifs_compound_callback(server, smb); + cifs_wake_up_task(server, smb); } =20 static void -cifs_cancelled_callback(struct smb_message *smb) +cifs_cancelled_callback(struct TCP_Server_Info *server, struct smb_message= *smb) { - cifs_compound_callback(smb); - release_mid(smb); + cifs_compound_callback(server, smb); + release_mid(server, smb); } =20 /* @@ -942,7 +938,7 @@ compound_send_recv(const unsigned int xid, struct cifs_= ses *ses, if (IS_ERR(smb[i])) { revert_current_mid(server, i); for (j =3D 0; j < i; j++) - delete_mid(smb[j]); + delete_mid(server, smb[j]); cifs_server_unlock(server); =20 /* Update # of requests on wire to server */ @@ -1097,7 +1093,7 @@ compound_send_recv(const unsigned int xid, struct cif= s_ses *ses, */ for (i =3D 0; i < num_rqst; i++) { if (!cancelled_mid[i]) - delete_mid(smb[i]); + delete_mid(server, smb[i]); } =20 return rc; @@ -1146,7 +1142,7 @@ __cifs_readv_discard(struct TCP_Server_Info *server, = struct smb_message *smb, int length; =20 length =3D cifs_discard_remaining_data(server); - dequeue_mid(smb, malformed); + dequeue_mid(server, smb, malformed); smb->resp_buf =3D server->smallbuf; server->smallbuf =3D NULL; return length; @@ -1283,7 +1279,7 @@ cifs_readv_receive(struct TCP_Server_Info *server, st= ruct smb_message *smb) if (server->total_read < buflen) return cifs_readv_discard(server, smb); =20 - dequeue_mid(smb, false); + dequeue_mid(server, smb, false); smb->resp_buf =3D server->smallbuf; server->smallbuf =3D NULL; return length;