[PATCH v5 4/7] CIFS: Use NT_CREATE_ANDX command for forcemand mounts

Pavel Shilovsky
2013-04-09T12:36:40Z

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@etersoft.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