linux-kernel - [PATCH v4 4/7] CIFS: Use NT_CREATE_ANDX command for forcemand mounts

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Message-Id: <1365181075-22540-5-git-send-email-piastry@etersoft.ru>
Date:	Fri,  5 Apr 2013 20:57:52 +0400
From:	Pavel Shilovsky <piastry@...rsoft.ru>
To:	linux-kernel@...r.kernel.org
Cc:	linux-cifs@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	linux-nfs@...r.kernel.org, wine-devel@...ehq.org
Subject: [PATCH v4 4/7] CIFS: Use NT_CREATE_ANDX command for forcemand mounts

forcemand mount option now lets us use Windows mandatory style of
byte-range locks even if server supports posix ones - switches on
Windows locking mechanism. Share flags is another locking mehanism
provided by Windows semantic that can be used by NT_CREATE_ANDX
command. This patch combines all Windows locking mechanism in one
mount option by using NT_CREATE_ANDX to open files if forcemand is on.

Signed-off-by: Pavel Shilovsky <piastry@...rsoft.ru>
---
 fs/cifs/dir.c  | 1 +
 fs/cifs/file.c | 6 ++++--
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index d4331de..8587021 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -217,6 +217,7 @@ cifs_do_create(struct inode *inode, struct dentry *direntry, unsigned int xid,
 	}
 
 	if (tcon->unix_ext && cap_unix(tcon->ses) && !tcon->broken_posix_open &&
+	    ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) == 0) &&
 	    (CIFS_UNIX_POSIX_PATH_OPS_CAP &
 			le64_to_cpu(tcon->fsUnixInfo.Capability))) {
 		rc = cifs_posix_open(full_path, &newinode, inode->i_sb, mode,
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 9394b2b..19038a4 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -455,8 +455,9 @@ int cifs_open(struct inode *inode, struct file *file)
 	else
 		oplock = 0;
 
-	if (!tcon->broken_posix_open && tcon->unix_ext &&
-	    cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP &
+	if (!tcon->broken_posix_open && tcon->unix_ext && cap_unix(tcon->ses)
+	    && ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) == 0) &&
+	    (CIFS_UNIX_POSIX_PATH_OPS_CAP &
 				le64_to_cpu(tcon->fsUnixInfo.Capability))) {
 		/* can not refresh inode info since size could be stale */
 		rc = cifs_posix_open(full_path, &inode, inode->i_sb,
@@ -624,6 +625,7 @@ cifs_reopen_file(struct cifsFileInfo *cfile, bool can_flush)
 		oplock = 0;
 
 	if (tcon->unix_ext && cap_unix(tcon->ses) &&
+	    ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) == 0) &&
 	    (CIFS_UNIX_POSIX_PATH_OPS_CAP &
 				le64_to_cpu(tcon->fsUnixInfo.Capability))) {
 		/*
-- 
1.8.1.5

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