CIFS: Add rwpidforward mount option
Add rwpidforward mount option that switches on a mode when we forward
pid of a process who opened a file to any read and write operation.
This can prevent applications like WINE from failing on read or write
operation on a previously locked file region from the same netfd from
another process if we use mandatory brlock style.
It is actual for WINE because during a run of WINE program two processes
work on the same netfd - share the same file struct between several VFS
fds:
1) WINE-server does open and lock;
2) WINE-application does read and write.
Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <sfrench@us.ibm.com>
diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h
index e41f607..1706345 100644
--- a/fs/cifs/cifsproto.h
+++ b/fs/cifs/cifsproto.h
@@ -345,9 +345,8 @@
extern int CIFSSMBFlush(const int xid, struct cifsTconInfo *tcon,
const int smb_file_id);
-extern int CIFSSMBRead(const int xid, struct cifsTconInfo *tcon,
- const int netfid, unsigned int count,
- const __u64 lseek, unsigned int *nbytes, char **buf,
+extern int CIFSSMBRead(const int xid, struct cifs_io_parms *io_parms,
+ unsigned int *nbytes, char **buf,
int *return_buf_type);
extern int CIFSSMBWrite(const int xid, struct cifs_io_parms *io_parms,
unsigned int *nbytes, const char *buf,