From patchwork Fri Nov 17 21:15:35 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Howells X-Patchwork-Id: 13459725 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="Np3Ch3On" Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 71602210B for ; Fri, 17 Nov 2023 13:18:42 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1700255921; 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=rc68sQS3vmzqJSqW6jNz9fp7Z8N7J7iRWbA/L5CiA9Y=; b=Np3Ch3OnW/83aB8YgJWHTDxKiQdyIDo/m0sghTW1PIyuHPH7iKbwIRCB/viHxtIAIuWqnB A46sMnoUof2nVXloFZVJfMqJAZ9cQmoCF1SRmTw+FtuDxz31YFVtIUg5jzLe0qMkclXjyk Z18W+sUKIPz8rDJCJCMibSkYyI3btzo= Received: from mimecast-mx02.redhat.com (mx-ext.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-255-2Z7TSI1AMx2cKIROapkEgA-1; Fri, 17 Nov 2023 16:18:37 -0500 X-MC-Unique: 2Z7TSI1AMx2cKIROapkEgA-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.rdu2.redhat.com [10.11.54.7]) (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 mimecast-mx02.redhat.com (Postfix) with ESMTPS id 739341C068E2; Fri, 17 Nov 2023 21:18:36 +0000 (UTC) Received: from warthog.procyon.org.com (unknown [10.42.28.16]) by smtp.corp.redhat.com (Postfix) with ESMTP id 4BD861C060AE; Fri, 17 Nov 2023 21:18:33 +0000 (UTC) From: David Howells To: Jeff Layton , Steve French Cc: David Howells , Matthew Wilcox , Marc Dionne , Paulo Alcantara , Shyam Prasad N , Tom Talpey , Dominique Martinet , Ilya Dryomov , Christian Brauner , linux-cachefs@redhat.com, linux-afs@lists.infradead.org, linux-cifs@vger.kernel.org, linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org, v9fs@lists.linux.dev, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Steve French , Shyam Prasad N , Rohith Surabattula Subject: [PATCH v2 43/51] cifs: Replace cifs_writedata with a wrapper around netfs_io_subrequest Date: Fri, 17 Nov 2023 21:15:35 +0000 Message-ID: <20231117211544.1740466-44-dhowells@redhat.com> In-Reply-To: <20231117211544.1740466-1-dhowells@redhat.com> References: <20231117211544.1740466-1-dhowells@redhat.com> Precedence: bulk X-Mailing-List: linux-cifs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.7 Replace the cifs_writedata struct with the same wrapper around netfs_io_subrequest that was used to replace cifs_readdata. Signed-off-by: David Howells cc: Steve French cc: Shyam Prasad N cc: Rohith Surabattula cc: Jeff Layton cc: linux-cifs@vger.kernel.org cc: linux-cachefs@redhat.com cc: linux-fsdevel@vger.kernel.org cc: linux-mm@kvack.org --- fs/smb/client/cifsglob.h | 30 +++------------ fs/smb/client/cifsproto.h | 16 ++++++-- fs/smb/client/cifssmb.c | 9 ++--- fs/smb/client/file.c | 79 ++++++++++++++++----------------------- fs/smb/client/smb2pdu.c | 9 ++--- fs/smb/client/smb2proto.h | 3 +- 6 files changed, 58 insertions(+), 88 deletions(-) diff --git a/fs/smb/client/cifsglob.h b/fs/smb/client/cifsglob.h index 94f2411861d0..a41aeb2967bd 100644 --- a/fs/smb/client/cifsglob.h +++ b/fs/smb/client/cifsglob.h @@ -238,7 +238,6 @@ struct cifs_fattr; struct smb3_fs_context; struct cifs_fid; struct cifs_io_subrequest; -struct cifs_writedata; struct cifs_io_parms; struct cifs_search_info; struct cifsInodeInfo; @@ -413,8 +412,7 @@ struct smb_version_operations { /* async read from the server */ int (*async_readv)(struct cifs_io_subrequest *); /* async write to the server */ - int (*async_writev)(struct cifs_writedata *, - void (*release)(struct kref *)); + int (*async_writev)(struct cifs_io_subrequest *); /* sync read from the server */ int (*sync_read)(const unsigned int, struct cifs_fid *, struct cifs_io_parms *, unsigned int *, char **, @@ -1442,35 +1440,17 @@ struct cifs_io_subrequest { #endif struct cifs_credits credits; - // TODO: Remove following elements - struct list_head list; - struct completion done; - struct work_struct work; - struct iov_iter iter; - __u64 offset; - unsigned int bytes; -}; + enum writeback_sync_modes sync_mode; + bool uncached; + struct bio_vec *bv; -/* asynchronous write support */ -struct cifs_writedata { - struct kref refcount; + // TODO: Remove following elements struct list_head list; struct completion done; - enum writeback_sync_modes sync_mode; struct work_struct work; - struct cifsFileInfo *cfile; - struct cifs_aio_ctx *ctx; struct iov_iter iter; - struct bio_vec *bv; __u64 offset; - pid_t pid; unsigned int bytes; - int result; - struct TCP_Server_Info *server; -#ifdef CONFIG_CIFS_SMB_DIRECT - struct smbd_mr *mr; -#endif - struct cifs_credits credits; }; /* diff --git a/fs/smb/client/cifsproto.h b/fs/smb/client/cifsproto.h index 1702f95efda1..be46efbbf7ac 100644 --- a/fs/smb/client/cifsproto.h +++ b/fs/smb/client/cifsproto.h @@ -590,11 +590,19 @@ static inline void cifs_put_readdata(struct cifs_io_subrequest *rdata) int cifs_async_readv(struct cifs_io_subrequest *rdata); int cifs_readv_receive(struct TCP_Server_Info *server, struct mid_q_entry *mid); -int cifs_async_writev(struct cifs_writedata *wdata, - void (*release)(struct kref *kref)); +int cifs_async_writev(struct cifs_io_subrequest *wdata); void cifs_writev_complete(struct work_struct *work); -struct cifs_writedata *cifs_writedata_alloc(work_func_t complete); -void cifs_writedata_release(struct kref *refcount); +struct cifs_io_subrequest *cifs_writedata_alloc(work_func_t complete); +void cifs_writedata_release(struct cifs_io_subrequest *rdata); +static inline void cifs_get_writedata(struct cifs_io_subrequest *wdata) +{ + refcount_inc(&wdata->subreq.ref); +} +static inline void cifs_put_writedata(struct cifs_io_subrequest *wdata) +{ + if (refcount_dec_and_test(&wdata->subreq.ref)) + cifs_writedata_release(wdata); +} int cifs_query_mf_symlink(unsigned int xid, struct cifs_tcon *tcon, struct cifs_sb_info *cifs_sb, const unsigned char *path, char *pbuf, diff --git a/fs/smb/client/cifssmb.c b/fs/smb/client/cifssmb.c index 76005b3d5ffe..14fca3fa3e08 100644 --- a/fs/smb/client/cifssmb.c +++ b/fs/smb/client/cifssmb.c @@ -1610,7 +1610,7 @@ CIFSSMBWrite(const unsigned int xid, struct cifs_io_parms *io_parms, static void cifs_writev_callback(struct mid_q_entry *mid) { - struct cifs_writedata *wdata = mid->callback_data; + struct cifs_io_subrequest *wdata = mid->callback_data; struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink); unsigned int written; WRITE_RSP *smb = (WRITE_RSP *)mid->resp_buf; @@ -1655,8 +1655,7 @@ cifs_writev_callback(struct mid_q_entry *mid) /* cifs_async_writev - send an async write, and set up mid to handle result */ int -cifs_async_writev(struct cifs_writedata *wdata, - void (*release)(struct kref *kref)) +cifs_async_writev(struct cifs_io_subrequest *wdata) { int rc = -EACCES; WRITE_REQ *smb = NULL; @@ -1723,14 +1722,14 @@ cifs_async_writev(struct cifs_writedata *wdata, iov[1].iov_len += 4; /* pad bigger by four bytes */ } - kref_get(&wdata->refcount); + cifs_get_writedata(wdata); rc = cifs_call_async(tcon->ses->server, &rqst, NULL, cifs_writev_callback, NULL, wdata, 0, NULL); if (rc == 0) cifs_stats_inc(&tcon->stats.cifs_stats.num_writes); else - kref_put(&wdata->refcount, release); + cifs_put_writedata(wdata); async_writev_out: cifs_small_buf_release(smb); diff --git a/fs/smb/client/file.c b/fs/smb/client/file.c index 385830b02e0a..6b28fea8a980 100644 --- a/fs/smb/client/file.c +++ b/fs/smb/client/file.c @@ -2411,10 +2411,10 @@ cifs_get_readable_path(struct cifs_tcon *tcon, const char *name, } void -cifs_writedata_release(struct kref *refcount) +cifs_writedata_release(struct cifs_io_subrequest *wdata) { - struct cifs_writedata *wdata = container_of(refcount, - struct cifs_writedata, refcount); + if (wdata->uncached) + kref_put(&wdata->ctx->refcount, cifs_aio_ctx_release); #ifdef CONFIG_CIFS_SMB_DIRECT if (wdata->mr) { smbd_deregister_mr(wdata->mr); @@ -2433,7 +2433,7 @@ cifs_writedata_release(struct kref *refcount) * possible that the page was redirtied so re-clean the page. */ static void -cifs_writev_requeue(struct cifs_writedata *wdata) +cifs_writev_requeue(struct cifs_io_subrequest *wdata) { int rc = 0; struct inode *inode = d_inode(wdata->cfile->dentry); @@ -2443,7 +2443,7 @@ cifs_writev_requeue(struct cifs_writedata *wdata) server = tlink_tcon(wdata->cfile->tlink)->ses->server; do { - struct cifs_writedata *wdata2; + struct cifs_io_subrequest *wdata2; unsigned int wsize, cur_len; wsize = server->ops->wp_retry_size(inode); @@ -2466,7 +2466,7 @@ cifs_writev_requeue(struct cifs_writedata *wdata) wdata2->sync_mode = wdata->sync_mode; wdata2->offset = fpos; wdata2->bytes = cur_len; - wdata2->iter = wdata->iter; + wdata2->iter = wdata->iter; iov_iter_advance(&wdata2->iter, fpos - wdata->offset); iov_iter_truncate(&wdata2->iter, wdata2->bytes); @@ -2488,11 +2488,10 @@ cifs_writev_requeue(struct cifs_writedata *wdata) rc = -EBADF; } else { wdata2->pid = wdata2->cfile->pid; - rc = server->ops->async_writev(wdata2, - cifs_writedata_release); + rc = server->ops->async_writev(wdata2); } - kref_put(&wdata2->refcount, cifs_writedata_release); + cifs_put_writedata(wdata2); if (rc) { if (is_retryable_error(rc)) continue; @@ -2511,14 +2510,14 @@ cifs_writev_requeue(struct cifs_writedata *wdata) if (rc != 0 && !is_retryable_error(rc)) mapping_set_error(inode->i_mapping, rc); - kref_put(&wdata->refcount, cifs_writedata_release); + cifs_put_writedata(wdata); } void cifs_writev_complete(struct work_struct *work) { - struct cifs_writedata *wdata = container_of(work, - struct cifs_writedata, work); + struct cifs_io_subrequest *wdata = container_of(work, + struct cifs_io_subrequest, work); struct inode *inode = d_inode(wdata->cfile->dentry); if (wdata->result == 0) { @@ -2539,16 +2538,16 @@ cifs_writev_complete(struct work_struct *work) if (wdata->result != -EAGAIN) mapping_set_error(inode->i_mapping, wdata->result); - kref_put(&wdata->refcount, cifs_writedata_release); + cifs_put_writedata(wdata); } -struct cifs_writedata *cifs_writedata_alloc(work_func_t complete) +struct cifs_io_subrequest *cifs_writedata_alloc(work_func_t complete) { - struct cifs_writedata *wdata; + struct cifs_io_subrequest *wdata; wdata = kzalloc(sizeof(*wdata), GFP_NOFS); if (wdata != NULL) { - kref_init(&wdata->refcount); + refcount_set(&wdata->subreq.ref, 1); INIT_LIST_HEAD(&wdata->list); init_completion(&wdata->done); INIT_WORK(&wdata->work, complete); @@ -2729,7 +2728,7 @@ static ssize_t cifs_write_back_from_locked_folio(struct address_space *mapping, { struct inode *inode = mapping->host; struct TCP_Server_Info *server; - struct cifs_writedata *wdata; + struct cifs_io_subrequest *wdata; struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); struct cifs_credits credits_on_stack; struct cifs_credits *credits = &credits_on_stack; @@ -2821,10 +2820,9 @@ static ssize_t cifs_write_back_from_locked_folio(struct address_space *mapping, if (wdata->cfile->invalidHandle) rc = -EAGAIN; else - rc = wdata->server->ops->async_writev(wdata, - cifs_writedata_release); + rc = wdata->server->ops->async_writev(wdata); if (rc >= 0) { - kref_put(&wdata->refcount, cifs_writedata_release); + cifs_put_writedata(wdata); goto err_close; } } else { @@ -2834,7 +2832,7 @@ static ssize_t cifs_write_back_from_locked_folio(struct address_space *mapping, } err_wdata: - kref_put(&wdata->refcount, cifs_writedata_release); + cifs_put_writedata(wdata); err_uncredit: add_credits_and_wake_if(server, credits, 0); err_close: @@ -3223,23 +3221,13 @@ int cifs_flush(struct file *file, fl_owner_t id) return rc; } -static void -cifs_uncached_writedata_release(struct kref *refcount) -{ - struct cifs_writedata *wdata = container_of(refcount, - struct cifs_writedata, refcount); - - kref_put(&wdata->ctx->refcount, cifs_aio_ctx_release); - cifs_writedata_release(refcount); -} - static void collect_uncached_write_data(struct cifs_aio_ctx *ctx); static void cifs_uncached_writev_complete(struct work_struct *work) { - struct cifs_writedata *wdata = container_of(work, - struct cifs_writedata, work); + struct cifs_io_subrequest *wdata = container_of(work, + struct cifs_io_subrequest, work); struct inode *inode = d_inode(wdata->cfile->dentry); struct cifsInodeInfo *cifsi = CIFS_I(inode); @@ -3252,11 +3240,11 @@ cifs_uncached_writev_complete(struct work_struct *work) complete(&wdata->done); collect_uncached_write_data(wdata->ctx); /* the below call can possibly free the last ref to aio ctx */ - kref_put(&wdata->refcount, cifs_uncached_writedata_release); + cifs_put_writedata(wdata); } static int -cifs_resend_wdata(struct cifs_writedata *wdata, struct list_head *wdata_list, +cifs_resend_wdata(struct cifs_io_subrequest *wdata, struct list_head *wdata_list, struct cifs_aio_ctx *ctx) { unsigned int wsize; @@ -3305,8 +3293,7 @@ cifs_resend_wdata(struct cifs_writedata *wdata, struct list_head *wdata_list, wdata->mr = NULL; } #endif - rc = server->ops->async_writev(wdata, - cifs_uncached_writedata_release); + rc = server->ops->async_writev(wdata); } } @@ -3321,7 +3308,7 @@ cifs_resend_wdata(struct cifs_writedata *wdata, struct list_head *wdata_list, } while (rc == -EAGAIN); fail: - kref_put(&wdata->refcount, cifs_uncached_writedata_release); + cifs_put_writedata(wdata); return rc; } @@ -3373,7 +3360,7 @@ cifs_write_from_iter(loff_t fpos, size_t len, struct iov_iter *from, { int rc = 0; size_t cur_len, max_len; - struct cifs_writedata *wdata; + struct cifs_io_subrequest *wdata; pid_t pid; struct TCP_Server_Info *server; unsigned int xid, max_segs = INT_MAX; @@ -3437,6 +3424,7 @@ cifs_write_from_iter(loff_t fpos, size_t len, struct iov_iter *from, break; } + wdata->uncached = true; wdata->sync_mode = WB_SYNC_ALL; wdata->offset = (__u64)fpos; wdata->cfile = cifsFileInfo_get(open_file); @@ -3456,14 +3444,12 @@ cifs_write_from_iter(loff_t fpos, size_t len, struct iov_iter *from, if (wdata->cfile->invalidHandle) rc = -EAGAIN; else - rc = server->ops->async_writev(wdata, - cifs_uncached_writedata_release); + rc = server->ops->async_writev(wdata); } if (rc) { add_credits_and_wake_if(server, &wdata->credits, 0); - kref_put(&wdata->refcount, - cifs_uncached_writedata_release); + cifs_put_writedata(wdata); if (rc == -EAGAIN) continue; break; @@ -3481,7 +3467,7 @@ cifs_write_from_iter(loff_t fpos, size_t len, struct iov_iter *from, static void collect_uncached_write_data(struct cifs_aio_ctx *ctx) { - struct cifs_writedata *wdata, *tmp; + struct cifs_io_subrequest *wdata, *tmp; struct cifs_tcon *tcon; struct cifs_sb_info *cifs_sb; struct dentry *dentry = ctx->cfile->dentry; @@ -3536,8 +3522,7 @@ static void collect_uncached_write_data(struct cifs_aio_ctx *ctx) ctx->cfile, cifs_sb, &tmp_list, ctx); - kref_put(&wdata->refcount, - cifs_uncached_writedata_release); + cifs_put_writedata(wdata); } list_splice(&tmp_list, &ctx->list); @@ -3545,7 +3530,7 @@ static void collect_uncached_write_data(struct cifs_aio_ctx *ctx) } } list_del_init(&wdata->list); - kref_put(&wdata->refcount, cifs_uncached_writedata_release); + cifs_put_writedata(wdata); } cifs_stats_bytes_written(tcon, ctx->total_len); diff --git a/fs/smb/client/smb2pdu.c b/fs/smb/client/smb2pdu.c index 148652891ead..85a85821390f 100644 --- a/fs/smb/client/smb2pdu.c +++ b/fs/smb/client/smb2pdu.c @@ -4520,7 +4520,7 @@ SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms, static void smb2_writev_callback(struct mid_q_entry *mid) { - struct cifs_writedata *wdata = mid->callback_data; + struct cifs_io_subrequest *wdata = mid->callback_data; struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink); struct TCP_Server_Info *server = wdata->server; unsigned int written; @@ -4601,8 +4601,7 @@ smb2_writev_callback(struct mid_q_entry *mid) /* smb2_async_writev - send an async write, and set up mid to handle result */ int -smb2_async_writev(struct cifs_writedata *wdata, - void (*release)(struct kref *kref)) +smb2_async_writev(struct cifs_io_subrequest *wdata) { int rc = -EACCES, flags = 0; struct smb2_write_req *req = NULL; @@ -4734,7 +4733,7 @@ smb2_async_writev(struct cifs_writedata *wdata, flags |= CIFS_HAS_CREDITS; } - kref_get(&wdata->refcount); + cifs_get_writedata(wdata); rc = cifs_call_async(server, &rqst, NULL, smb2_writev_callback, NULL, wdata, flags, &wdata->credits); @@ -4746,7 +4745,7 @@ smb2_async_writev(struct cifs_writedata *wdata, io_parms->offset, io_parms->length, rc); - kref_put(&wdata->refcount, release); + cifs_put_writedata(wdata); cifs_stats_fail_inc(tcon, SMB2_WRITE_HE); } diff --git a/fs/smb/client/smb2proto.h b/fs/smb/client/smb2proto.h index 02ffe5ec9b21..4d3d51e42d3c 100644 --- a/fs/smb/client/smb2proto.h +++ b/fs/smb/client/smb2proto.h @@ -189,8 +189,7 @@ extern int SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon, extern int smb2_async_readv(struct cifs_io_subrequest *rdata); extern int SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms, unsigned int *nbytes, char **buf, int *buf_type); -extern int smb2_async_writev(struct cifs_writedata *wdata, - void (*release)(struct kref *kref)); +extern int smb2_async_writev(struct cifs_io_subrequest *wdata); extern int SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms, unsigned int *nbytes, struct kvec *iov, int n_vec); extern int SMB2_echo(struct TCP_Server_Info *server);