[10/14] cifs: Hold the open file on netfs_io_request, not netfs_io_subrequest

Message ID	164928627647.457102.2829578394147148029.stgit@warthog.procyon.org.uk (mailing list archive)
State	New, archived
Headers	show Return-Path: <linux-cifs-owner@kernel.org> Organization: Red Hat UK Ltd. Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SI4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 3798903 Subject: [PATCH 10/14] cifs: Hold the open file on netfs_io_request, not netfs_io_subrequest From: David Howells <dhowells@redhat.com> To: linux-cachefs@redhat.com Cc: Steve French <sfrench@samba.org>, Shyam Prasad N <nspmangalore@gmail.com>, Rohith Surabattula <rohiths.msft@gmail.com>, linux-cifs@vger.kernel.org, dhowells@redhat.com, Steve French <sfrench@samba.org>, Shyam Prasad N <nspmangalore@gmail.com>, Rohith Surabattula <rohiths.msft@gmail.com>, Jeff Layton <jlayton@redhat.com>, linux-cifs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org Date: Thu, 07 Apr 2022 00:04:36 +0100 Message-ID: <164928627647.457102.2829578394147148029.stgit@warthog.procyon.org.uk> In-Reply-To: <164928615045.457102.10607899252434268982.stgit@warthog.procyon.org.uk> References: <164928615045.457102.10607899252434268982.stgit@warthog.procyon.org.uk> User-Agent: StGit/1.4 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Precedence: bulk
Series	cifs: Iterators, netfslib and folios \| expand [00/14] cifs: Iterators, netfslib and folios [01/14] cifs: Add some helper functions [02/14] cifs: Add a function to read into an iter from a socket [03/14] cifs: Check the IOCB_DIRECT flag, not O_DIRECT [04/14] cifs: Change the I/O paths to use an iterator rather than a page list [05/14] cifs: Remove unused code [06/14] cifs: Use netfslib to handle reads [07/14] cifs: Share server EOF pos with netfslib [08/14] netfs: Allow the netfs to make the io (sub)request alloc larger [09/14] cifs: Put credits into cifs_io_subrequest, not on the stack [10/14] cifs: Hold the open file on netfs_io_request, not netfs_io_subrequest [11/14] cifs: Clamp length according to credits and rsize [12/14] cifs: Expose netfs subrequest debug ID and index in read tracepoints [13/14] cifs: Split the smb3_add_credits tracepoint [14/14] mm, netfs, fscache: Stop read optimisation when folio removed from pagecache

diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h index 61b40721178a..e1e77225d634 100644 --- a/fs/cifs/cifsglob.h +++ b/fs/cifs/cifsglob.h @@ -1313,10 +1313,18 @@ struct cifs_aio_ctx { bool direct_io; }; +struct cifs_io_request { + struct netfs_io_request rreq; + struct cifsFileInfo *cfile; +}; + /* asynchronous read support */ struct cifs_io_subrequest { - struct netfs_io_subrequest subreq; - struct cifsFileInfo *cfile; + union { + struct netfs_io_subrequest subreq; + struct netfs_io_request *rreq; + struct cifs_io_request *req; + }; __u64 offset; ssize_t got_bytes; unsigned int bytes; diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c index f736493746b4..0c039eee1234 100644 --- a/fs/cifs/cifssmb.c +++ b/fs/cifs/cifssmb.c @@ -1570,7 +1570,7 @@ static void cifs_readv_callback(struct mid_q_entry *mid) { struct cifs_io_subrequest *rdata = mid->callback_data; - struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink); + struct cifs_tcon *tcon = tlink_tcon(rdata->req->cfile->tlink); struct TCP_Server_Info *server = tcon->ses->server; struct smb_rqst rqst = { .rq_iov = rdata->iov, .rq_nvec = 2, @@ -1628,7 +1628,7 @@ cifs_async_readv(struct cifs_io_subrequest *rdata) int rc; READ_REQ *smb = NULL; int wct; - struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink); + struct cifs_tcon *tcon = tlink_tcon(rdata->req->cfile->tlink); struct smb_rqst rqst = { .rq_iov = rdata->iov, .rq_nvec = 2 }; @@ -1653,7 +1653,7 @@ cifs_async_readv(struct cifs_io_subrequest *rdata) smb->hdr.PidHigh = cpu_to_le16((__u16)(rdata->pid >> 16)); smb->AndXCommand = 0xFF; /* none */ - smb->Fid = rdata->cfile->fid.netfid; + smb->Fid = rdata->req->cfile->fid.netfid; smb->OffsetLow = cpu_to_le32(rdata->offset & 0xFFFFFFFF); if (wct == 12) smb->OffsetHigh = cpu_to_le32(rdata->offset >> 32); diff --git a/fs/cifs/file.c b/fs/cifs/file.c index fc3a46f7e2cf..45510bd1f702 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -3448,7 +3448,7 @@ static void cifs_req_issue_read(struct netfs_io_subrequest *subreq) struct netfs_io_request *rreq = subreq->rreq; struct TCP_Server_Info *server; struct cifs_io_subrequest *rdata = container_of(subreq, struct cifs_io_subrequest, subreq); - struct cifsFileInfo *open_file = rreq->netfs_priv; + struct cifs_io_request *req = container_of(subreq->rreq, struct cifs_io_request, rreq); struct cifs_sb_info *cifs_sb = CIFS_SB(rreq->inode->i_sb); unsigned int xid; pid_t pid; @@ -3458,19 +3458,19 @@ static void cifs_req_issue_read(struct netfs_io_subrequest *subreq) xid = get_xid(); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD) - pid = open_file->pid; + pid = req->cfile->pid; else pid = current->tgid; // Ummm... This may be a workqueue - server = cifs_pick_channel(tlink_tcon(open_file->tlink)->ses); + server = cifs_pick_channel(tlink_tcon(req->cfile->tlink)->ses); cifs_dbg(FYI, "%s: op=%08x[%x] mapping=%p len=%zu/%zu\n", __func__, rreq->debug_id, subreq->debug_index, rreq->mapping, subreq->transferred, subreq->len); - if (open_file->invalidHandle) { + if (req->cfile->invalidHandle) { do { - rc = cifs_reopen_file(open_file, true); + rc = cifs_reopen_file(req->cfile, true); } while (rc == -EAGAIN); if (rc) goto out; @@ -3478,7 +3478,7 @@ static void cifs_req_issue_read(struct netfs_io_subrequest *subreq) if (cifs_sb->ctx->rsize == 0) cifs_sb->ctx->rsize = - server->ops->negotiate_rsize(tlink_tcon(open_file->tlink), + server->ops->negotiate_rsize(tlink_tcon(req->cfile->tlink), cifs_sb->ctx); rc = server->ops->wait_mtu_credits(server, cifs_sb->ctx->rsize, &rsize, @@ -3487,7 +3487,6 @@ static void cifs_req_issue_read(struct netfs_io_subrequest *subreq) goto out; __set_bit(NETFS_SREQ_CLEAR_TAIL, &subreq->flags); - rdata->cfile = cifsFileInfo_get(open_file); rdata->server = server; rdata->offset = subreq->start + subreq->transferred; rdata->bytes = subreq->len - subreq->transferred; @@ -3495,7 +3494,7 @@ static void cifs_req_issue_read(struct netfs_io_subrequest *subreq) rc = adjust_credits(server, &rdata->credits, rdata->bytes); if (!rc) { - if (rdata->cfile->invalidHandle) + if (rdata->req->cfile->invalidHandle) rc = -EAGAIN; else rc = server->ops->async_readv(rdata); @@ -3509,7 +3508,10 @@ static void cifs_req_issue_read(struct netfs_io_subrequest *subreq) static int cifs_init_request(struct netfs_io_request *rreq, struct file *file) { - rreq->netfs_priv = file->private_data; + struct cifs_io_request *req = container_of(rreq, struct cifs_io_request, rreq); + struct cifsFileInfo *open_file = file->private_data; + + req->cfile = cifsFileInfo_get(open_file); return 0; } @@ -3566,6 +3568,14 @@ static int cifs_begin_cache_operation(struct netfs_io_request *rreq) #endif } +static void cifs_free_request(struct netfs_io_request *rreq) +{ + struct cifs_io_request *req = container_of(rreq, struct cifs_io_request, rreq); + + if (req->cfile) + cifsFileInfo_put(req->cfile); +} + static void cifs_free_subrequest(struct netfs_io_subrequest *subreq) { struct cifs_io_subrequest *rdata = @@ -3580,14 +3590,14 @@ static void cifs_free_subrequest(struct netfs_io_subrequest *subreq) #endif add_credits_and_wake_if(rdata->server, &rdata->credits, 0); - if (rdata->cfile) - cifsFileInfo_put(rdata->cfile); } } const struct netfs_request_ops cifs_req_ops = { + .io_request_size = sizeof(struct cifs_io_request), .io_subrequest_size = sizeof(struct cifs_io_subrequest), .init_request = cifs_init_request, + .free_request = cifs_free_request, .free_subrequest = cifs_free_subrequest, .begin_cache_operation = cifs_begin_cache_operation, .expand_readahead = cifs_expand_readahead, diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c index 696e38da9ae7..6a8aaa003e54 100644 --- a/fs/cifs/smb2pdu.c +++ b/fs/cifs/smb2pdu.c @@ -4110,7 +4110,7 @@ static void smb2_readv_callback(struct mid_q_entry *mid) { struct cifs_io_subrequest *rdata = mid->callback_data; - struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink); + struct cifs_tcon *tcon = tlink_tcon(rdata->req->cfile->tlink); struct TCP_Server_Info *server = rdata->server; struct smb2_hdr *shdr = (struct smb2_hdr *)rdata->iov[0].iov_base; @@ -4175,12 +4175,12 @@ smb2_readv_callback(struct mid_q_entry *mid) if (rdata->result && rdata->result != -ENODATA) { cifs_stats_fail_inc(tcon, SMB2_READ_HE); trace_smb3_read_err(0 /* xid */, - rdata->cfile->fid.persistent_fid, + rdata->req->cfile->fid.persistent_fid, tcon->tid, tcon->ses->Suid, rdata->offset, rdata->bytes, rdata->result); } else trace_smb3_read_done(0 /* xid */, - rdata->cfile->fid.persistent_fid, + rdata->req->cfile->fid.persistent_fid, tcon->tid, tcon->ses->Suid, rdata->offset, rdata->got_bytes); @@ -4211,7 +4211,7 @@ smb2_async_readv(struct cifs_io_subrequest *rdata) struct smb_rqst rqst = { .rq_iov = rdata->iov, .rq_nvec = 1 }; struct TCP_Server_Info *server; - struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink); + struct cifs_tcon *tcon = tlink_tcon(rdata->req->cfile->tlink); unsigned int total_len; cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n", @@ -4220,12 +4220,12 @@ smb2_async_readv(struct cifs_io_subrequest *rdata) if (!rdata->server) rdata->server = cifs_pick_channel(tcon->ses); - io_parms.tcon = tlink_tcon(rdata->cfile->tlink); + io_parms.tcon = tlink_tcon(rdata->req->cfile->tlink); io_parms.server = server = rdata->server; io_parms.offset = rdata->offset; io_parms.length = rdata->bytes; - io_parms.persistent_fid = rdata->cfile->fid.persistent_fid; - io_parms.volatile_fid = rdata->cfile->fid.volatile_fid; + io_parms.persistent_fid = rdata->req->cfile->fid.persistent_fid; + io_parms.volatile_fid = rdata->req->cfile->fid.volatile_fid; io_parms.pid = rdata->pid; rc = smb2_new_read_req(

[10/14] cifs: Hold the open file on netfs_io_request, not netfs_io_subrequest

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