From patchwork Tue Dec 3 09:37:32 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Steve French X-Patchwork-Id: 1203583 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (no SPF record) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-cifs-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="Dv5D1716"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 47RxjP22C3z9sPJ for ; Tue, 3 Dec 2019 20:37:45 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726057AbfLCJho (ORCPT ); Tue, 3 Dec 2019 04:37:44 -0500 Received: from mail-il1-f171.google.com ([209.85.166.171]:39666 "EHLO mail-il1-f171.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725939AbfLCJho (ORCPT ); Tue, 3 Dec 2019 04:37:44 -0500 Received: by mail-il1-f171.google.com with SMTP id a7so2551354ild.6 for ; Tue, 03 Dec 2019 01:37:43 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:from:date:message-id:subject:to; bh=v2qbrus5dvXz9bW/rb1sxeouizNhDJIU0GFXfPI61ZU=; b=Dv5D1716gSVeIRK7uSu3xlMhLZeV4VJINVHaBqn58AuV3B+UyOXIaCG5cQc7pVC0yQ 8XXp7BpQrLJQp5J81Lm6v1qMzXRFuqg56gonUTKZhLRU5boIa3qh5no8B6JW9folg+sN rqBndoDKNZzSYu6d4MI4Bt5RTZ6tS8zdDNZXfdnLx2CYrRya4RrUnYmf15b0Q4X/ckWi 2qhgzERh0JbO0iRfIzEPSg6mzQiAXekK+EdQ/cqcjNnB0ILg+FFBDTimr2TVBRI+LXBd A43PT0k9r8yVMddHOpS+epEZjcEeE60o3uUtsrsoabndKOMlEvliM2879ZffyT/0nu82 I8nw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to; bh=v2qbrus5dvXz9bW/rb1sxeouizNhDJIU0GFXfPI61ZU=; b=L60+0goE1h/tqavy73HS6TI3Radd5PJTGT4z0VbiIkwafA0xyT6ptbcBDhAyZCNlkI /YBVgJFBuvkfxBoNXPVB2y++lIYlgmkFh/9cw8R6goFjbMRkR6G5rNn/OWzFTT6QuIL1 9rpelBshsex+Ni7KRLfFqL0wX1NPiML9fBRbsXmcrqdo/F1QNXpM8L9QR4L7erlZaU2i Pw3VXm6ajGIMX/2DOQuozkQ7OWYn5CbiGVJEBfiZcAMwS/e9vo+uy01xpXaUb9LRi76m 6+ORNsoS1gkK1lMo6lb3y5ZSWn6su25D2iriftnhJwxdKh2qLkWv2GP/wcCTf0t6nMsi ZV1A== X-Gm-Message-State: APjAAAVgIDvLzuKHC3Kw0p+0cShPPbzFUX+NshMj1JHR3+lszi49ZZ6q PDztwqXQqRON4ZM2rMKxiZhM76BXV/b98/iFn7NaaqY/ X-Google-Smtp-Source: APXvYqzyB4zwA5Yy+H21Lo5GVyHNV8uP4+SDTTnCre11d9DqOFFWr9jiEgrKXqda+n/9A1cj2uOM/5d+58nkdAVBcGQ= X-Received: by 2002:a92:6802:: with SMTP id d2mr3753827ilc.173.1575365862779; Tue, 03 Dec 2019 01:37:42 -0800 (PST) MIME-Version: 1.0 From: Steve French Date: Tue, 3 Dec 2019 03:37:32 -0600 Message-ID: Subject: [PATCH][SMB3] Query timestamps on file close To: CIFS Sender: linux-cifs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-cifs@vger.kernel.org Since timestamps on files on most servers can be updated at close, and since timestamps on our dentries default to one second we can have stale timestamps in some common cases (e.g. open, write, close, stat, wait one second, stat - will show different mtime for the first and second stat). The SMB2/SMB3 protocol allows querying timestamps at close so add the code to request timestamp and attr information (which is cheap for the server to provide) to be returned when a file is closed (it is not needed for the many paths that call SMB2_close that are from compounded query infos and close nor is it needed for some of the cases where a directory close immediately follows a directory open. Reviewed-by: Aurelien Aptel Reviewed-by: Pavel Shilovsky From a397f85531251cecf792a30a58132ff72cf1399f Mon Sep 17 00:00:00 2001 From: Steve French Date: Mon, 2 Dec 2019 21:46:54 -0600 Subject: [PATCH] smb3: query attributes on file close Since timestamps on files on most servers can be updated at close, and since timestamps on our dentries default to one second we can have stale timestamps in some common cases (e.g. open, write, close, stat, wait one second, stat - will show different mtime for the first and second stat). The SMB2/SMB3 protocol allows querying timestamps at close so add the code to request timestamp and attr information (which is cheap for the server to provide) to be returned when a file is closed (it is not needed for the many paths that call SMB2_close that are from compounded query infos and close nor is it needed for some of the cases where a directory close immediately follows a directory open. Signed-off-by: Steve French Acked-by: Ronnie Sahlberg --- fs/cifs/cifsglob.h | 3 +++ fs/cifs/file.c | 4 +++- fs/cifs/smb2inode.c | 2 +- fs/cifs/smb2ops.c | 40 ++++++++++++++++++++++++++++++++++++---- fs/cifs/smb2pdu.c | 35 ++++++++++++++++++++++++++++++----- fs/cifs/smb2pdu.h | 11 +++++++++++ fs/cifs/smb2proto.h | 5 ++++- 7 files changed, 88 insertions(+), 12 deletions(-) diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h index d34a4ed8c57d..5b976e01dd6b 100644 --- a/fs/cifs/cifsglob.h +++ b/fs/cifs/cifsglob.h @@ -368,6 +368,9 @@ struct smb_version_operations { /* close a file */ void (*close)(const unsigned int, struct cifs_tcon *, struct cifs_fid *); + /* close a file, returning file attributes and timestamps */ + void (*close_getattr)(const unsigned int xid, struct cifs_tcon *tcon, + struct cifsFileInfo *pfile_info); /* send a flush request to the server */ int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *); /* async read from the server */ diff --git a/fs/cifs/file.c b/fs/cifs/file.c index 9ae41042fa3d..043288b5c728 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -496,7 +496,9 @@ void _cifsFileInfo_put(struct cifsFileInfo *cifs_file, unsigned int xid; xid = get_xid(); - if (server->ops->close) + if (server->ops->close_getattr) + server->ops->close_getattr(xid, tcon, cifs_file); + else if (server->ops->close) server->ops->close(xid, tcon, &cifs_file->fid); _free_xid(xid); } diff --git a/fs/cifs/smb2inode.c b/fs/cifs/smb2inode.c index 4121ac1163ca..18c7a33adceb 100644 --- a/fs/cifs/smb2inode.c +++ b/fs/cifs/smb2inode.c @@ -313,7 +313,7 @@ smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon, rqst[num_rqst].rq_iov = close_iov; rqst[num_rqst].rq_nvec = 1; rc = SMB2_close_init(tcon, &rqst[num_rqst], COMPOUND_FID, - COMPOUND_FID); + COMPOUND_FID, false); smb2_set_related(&rqst[num_rqst]); if (rc) goto finished; diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c index a7f328f79c6f..f01e8e4a7cff 100644 --- a/fs/cifs/smb2ops.c +++ b/fs/cifs/smb2ops.c @@ -1178,7 +1178,7 @@ smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon, memset(&close_iov, 0, sizeof(close_iov)); rqst[2].rq_iov = close_iov; rqst[2].rq_nvec = 1; - rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID); + rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID, false); smb2_set_related(&rqst[2]); rc = compound_send_recv(xid, ses, flags, 3, rqst, @@ -1332,6 +1332,36 @@ smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon, SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); } +static void +smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon, + struct cifsFileInfo *cfile) +{ + struct smb2_file_network_open_info file_inf; + struct inode *inode; + int rc; + + rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid, + cfile->fid.volatile_fid, &file_inf); + if (rc) + return; + + inode = d_inode(cfile->dentry); + CIFS_I(inode)->time = jiffies; + + /* Creation time should not need to be updated on close */ + if (file_inf.LastWriteTime) + inode->i_mtime = cifs_NTtimeToUnix(file_inf.LastWriteTime); + if (file_inf.ChangeTime) + inode->i_ctime = cifs_NTtimeToUnix(file_inf.ChangeTime); + if (file_inf.LastAccessTime) + inode->i_atime = cifs_NTtimeToUnix(file_inf.LastAccessTime); + + /* End of file and Attributes should not have to be updated on close */ + + /* Should AllocationSize be updated on close? */ + +} + static int SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, u64 volatile_fid, @@ -1512,7 +1542,7 @@ smb2_ioctl_query_info(const unsigned int xid, rqst[2].rq_iov = close_iov; rqst[2].rq_nvec = 1; - rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID); + rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID, false); if (rc) goto iqinf_exit; smb2_set_related(&rqst[2]); @@ -2241,7 +2271,7 @@ smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon, rqst[2].rq_iov = close_iov; rqst[2].rq_nvec = 1; - rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID); + rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID, false); if (rc) goto qic_exit; smb2_set_related(&rqst[2]); @@ -2654,7 +2684,7 @@ smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon, rqst[2].rq_iov = close_iov; rqst[2].rq_nvec = 1; - rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID); + rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID, false); if (rc) goto querty_exit; @@ -4707,6 +4737,7 @@ struct smb_version_operations smb30_operations = { .open = smb2_open_file, .set_fid = smb2_set_fid, .close = smb2_close_file, + .close_getattr = smb2_close_getattr, .flush = smb2_flush_file, .async_readv = smb2_async_readv, .async_writev = smb2_async_writev, @@ -4816,6 +4847,7 @@ struct smb_version_operations smb311_operations = { .open = smb2_open_file, .set_fid = smb2_set_fid, .close = smb2_close_file, + .close_getattr = smb2_close_getattr, .flush = smb2_flush_file, .async_readv = smb2_async_readv, .async_writev = smb2_async_writev, diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c index cec53eb8a6da..8444b8425876 100644 --- a/fs/cifs/smb2pdu.c +++ b/fs/cifs/smb2pdu.c @@ -2932,7 +2932,7 @@ SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon, int SMB2_close_init(struct cifs_tcon *tcon, struct smb_rqst *rqst, - u64 persistent_fid, u64 volatile_fid) + u64 persistent_fid, u64 volatile_fid, bool query_attrs) { struct smb2_close_req *req; struct kvec *iov = rqst->rq_iov; @@ -2945,6 +2945,10 @@ SMB2_close_init(struct cifs_tcon *tcon, struct smb_rqst *rqst, req->PersistentFileId = persistent_fid; req->VolatileFileId = volatile_fid; + if (query_attrs) + req->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB; + else + req->Flags = 0; iov[0].iov_base = (char *)req; iov[0].iov_len = total_len; @@ -2959,8 +2963,9 @@ SMB2_close_free(struct smb_rqst *rqst) } int -SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, - u64 persistent_fid, u64 volatile_fid) +__SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, + u64 persistent_fid, u64 volatile_fid, + struct smb2_file_network_open_info *pbuf) { struct smb_rqst rqst; struct smb2_close_rsp *rsp = NULL; @@ -2970,6 +2975,7 @@ SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, int resp_buftype = CIFS_NO_BUFFER; int rc = 0; int flags = 0; + bool query_attrs = false; cifs_dbg(FYI, "Close\n"); @@ -2984,8 +2990,13 @@ SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, rqst.rq_iov = iov; rqst.rq_nvec = 1; + /* check if need to ask server to return timestamps in close response */ + if (pbuf) + query_attrs = true; + trace_smb3_close_enter(xid, persistent_fid, tcon->tid, ses->Suid); - rc = SMB2_close_init(tcon, &rqst, persistent_fid, volatile_fid); + rc = SMB2_close_init(tcon, &rqst, persistent_fid, volatile_fid, + query_attrs); if (rc) goto close_exit; @@ -2997,9 +3008,16 @@ SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, trace_smb3_close_err(xid, persistent_fid, tcon->tid, ses->Suid, rc); goto close_exit; - } else + } else { trace_smb3_close_done(xid, persistent_fid, tcon->tid, ses->Suid); + /* + * Note that have to subtract 4 since struct network_open_info + * has a final 4 byte pad that close respose does not have + */ + if (pbuf) + memcpy(pbuf, (char *)&rsp->CreationTime, sizeof(*pbuf) - 4); + } atomic_dec(&tcon->num_remote_opens); @@ -3022,6 +3040,13 @@ SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, return rc; } +int +SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, + u64 persistent_fid, u64 volatile_fid) +{ + return __SMB2_close(xid, tcon, persistent_fid, volatile_fid, NULL); +} + int smb2_validate_iov(unsigned int offset, unsigned int buffer_length, struct kvec *iov, unsigned int min_buf_size) diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h index f264e1d36fe1..fa2533da316d 100644 --- a/fs/cifs/smb2pdu.h +++ b/fs/cifs/smb2pdu.h @@ -1570,6 +1570,17 @@ struct smb2_file_eof_info { /* encoding of request for level 10 */ __le64 EndOfFile; /* new end of file value */ } __packed; /* level 20 Set */ +struct smb2_file_network_open_info { + __le64 CreationTime; + __le64 LastAccessTime; + __le64 LastWriteTime; + __le64 ChangeTime; + __le64 AllocationSize; + __le64 EndOfFile; + __le32 Attributes; + __le32 Reserved; +} __packed; /* level 34 Query also similar returned in close rsp and open rsp */ + extern char smb2_padding[7]; #endif /* _SMB2PDU_H */ diff --git a/fs/cifs/smb2proto.h b/fs/cifs/smb2proto.h index 5caeaa99cb7c..a18272c987fe 100644 --- a/fs/cifs/smb2proto.h +++ b/fs/cifs/smb2proto.h @@ -155,10 +155,13 @@ extern int SMB2_change_notify(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, u64 volatile_fid, bool watch_tree, u32 completion_filter); +extern int __SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, + u64 persistent_fid, u64 volatile_fid, + struct smb2_file_network_open_info *pbuf); extern int SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_file_id, u64 volatile_file_id); extern int SMB2_close_init(struct cifs_tcon *tcon, struct smb_rqst *rqst, - u64 persistent_file_id, u64 volatile_file_id); + u64 persistent_fid, u64 volatile_fid, bool query_attrs); extern void SMB2_close_free(struct smb_rqst *rqst); extern int SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_file_id, u64 volatile_file_id); -- 2.23.0