[v7,03/16] cifs: Replace cifs_writedata with a wrapper around netfs_io_subrequest

Message ID	20240430140930.262762-4-dhowells@redhat.com (mailing list archive)
State	New, archived
Headers	show Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (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 911FD17557B for <linux-cifs@vger.kernel.org>; Tue, 30 Apr 2024 14:09:48 +0000 (UTC) From: David Howells <dhowells@redhat.com> To: Steve French <smfrench@gmail.com> Cc: David Howells <dhowells@redhat.com>, Jeff Layton <jlayton@kernel.org>, Matthew Wilcox <willy@infradead.org>, Paulo Alcantara <pc@manguebit.com>, Shyam Prasad N <sprasad@microsoft.com>, Tom Talpey <tom@talpey.com>, Christian Brauner <christian@brauner.io>, netfs@lists.linux.dev, linux-cifs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Steve French <sfrench@samba.org>, Shyam Prasad N <nspmangalore@gmail.com>, Rohith Surabattula <rohiths.msft@gmail.com> Subject: [PATCH v7 03/16] cifs: Replace cifs_writedata with a wrapper around netfs_io_subrequest Date: Tue, 30 Apr 2024 15:09:15 +0100 Message-ID: <20240430140930.262762-4-dhowells@redhat.com> In-Reply-To: <20240430140930.262762-1-dhowells@redhat.com> References: <20240430140930.262762-1-dhowells@redhat.com> Precedence: bulk MIME-Version: 1.0 Content-Transfer-Encoding: 8bit
Series	netfs, cifs: Delegate high-level I/O to netfslib \| expand [v7,00/16] netfs, cifs: Delegate high-level I/O to netfslib [v7,01/16] cifs: Use alternative invalidation to using launder_folio [v7,02/16] cifs: Replace cifs_readdata with a wrapper around netfs_io_subrequest [v7,03/16] cifs: Replace cifs_writedata with a wrapper around netfs_io_subrequest [v7,04/16] cifs: Use more fields from netfs_io_subrequest [v7,05/16] cifs: Make wait_mtu_credits take size_t args [v7,06/16] cifs: Replace the writedata replay bool with a netfs sreq flag [v7,07/16] cifs: Move cifs_loose_read_iter() and cifs_file_write_iter() to file.c [v7,08/16] cifs: Set zero_point in the copy_file_range() and remap_file_range() [v7,09/16] cifs: Add mempools for cifs_io_request and cifs_io_subrequest structs [v7,10/16] cifs: Make add_credits_and_wake_if() clear deducted credits [v7,11/16] cifs: Implement netfslib hooks [v7,12/16] cifs: Cut over to using netfslib [v7,13/16] cifs: Remove some code that's no longer used, part 1 [v7,14/16] cifs: Remove some code that's no longer used, part 2 [v7,15/16] cifs: Remove some code that's no longer used, part 3 [v7,16/16] cifs: Enable large folio support

diff --git a/fs/smb/client/cifsglob.h b/fs/smb/client/cifsglob.h index 405110052e17..7c07cf8cc29d 100644 --- a/fs/smb/client/cifsglob.h +++ b/fs/smb/client/cifsglob.h @@ -269,7 +269,6 @@ 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; @@ -452,8 +451,7 @@ 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 **, @@ -1508,36 +1506,18 @@ 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; + bool replay; + 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; - bool replay; }; /* diff --git a/fs/smb/client/cifsproto.h b/fs/smb/client/cifsproto.h index 5712f789eaa0..cb5cc5711a84 100644 --- a/fs/smb/client/cifsproto.h +++ b/fs/smb/client/cifsproto.h @@ -612,11 +612,19 @@ 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 2aaeae6c5766..30d24b4fbdf6 100644 --- a/fs/smb/client/cifssmb.c +++ b/fs/smb/client/cifssmb.c @@ -1612,7 +1612,7 @@ 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; @@ -1657,8 +1657,7 @@ 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; @@ -1725,14 +1724,14 @@ 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 0bea058099d4..2a0982b2d577 100644 --- a/fs/smb/client/file.c +++ b/fs/smb/client/file.c @@ -2510,10 +2510,10 @@ 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); @@ -2532,7 +2532,7 @@ 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); @@ -2542,7 +2542,7 @@ 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); @@ -2565,7 +2565,7 @@ 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); @@ -2587,11 +2587,10 @@ 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; @@ -2610,14 +2609,14 @@ 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) { @@ -2638,16 +2637,16 @@ 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); @@ -2778,7 +2777,7 @@ 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; @@ -2871,10 +2870,9 @@ 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 { @@ -2884,7 +2882,7 @@ 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: @@ -3261,23 +3259,13 @@ 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); @@ -3290,11 +3278,11 @@ 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; @@ -3344,8 +3332,7 @@ 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); } } @@ -3360,7 +3347,7 @@ 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; } @@ -3412,7 +3399,7 @@ 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; @@ -3476,6 +3463,7 @@ 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); @@ -3495,14 +3483,12 @@ 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; @@ -3520,7 +3506,7 @@ 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; @@ -3575,8 +3561,7 @@ 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); @@ -3584,7 +3569,7 @@ 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 0957dd4c07e7..8143611ba336 100644 --- a/fs/smb/client/smb2pdu.c +++ b/fs/smb/client/smb2pdu.c @@ -4737,7 +4737,7 @@ 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; @@ -4818,8 +4818,7 @@ 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; @@ -4953,7 +4952,7 @@ 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); @@ -4965,7 +4964,7 @@ 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 740053c0118e..c781eaa0cba8 100644 --- a/fs/smb/client/smb2proto.h +++ b/fs/smb/client/smb2proto.h @@ -213,8 +213,7 @@ 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);

[v7,03/16] cifs: Replace cifs_writedata with a wrapper around netfs_io_subrequest

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