CIFS: Use pid saved from cifsFileInfo in writepages and set_file_size

We need it to make them work with mandatory locking style because
we can fail in a situation like when kernel need to flush dirty pages
and there is a lock held by a process who opened file.

Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <sfrench@us.ibm.com>

1 files changed, 10 insertions, 8 deletions

diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index 9ea65cf36714..0521492f5b3b 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -357,6 +357,7 @@ int cifs_mknod(struct inode *inode, struct dentry *direntry, int mode,
         struct cifs_sb_info *cifs_sb;
         struct tcon_link *tlink;
         struct cifsTconInfo *pTcon;
+        struct cifs_io_parms io_parms;
         char *full_path = NULL;
         struct inode *newinode = NULL;
         int oplock = 0;
@@ -439,16 +440,19 @@ int cifs_mknod(struct inode *inode, struct dentry *direntry, int mode,
          * timestamps in, but we can reuse it safely */
 
         pdev = (struct win_dev *)buf;
+        io_parms.netfid = fileHandle;
+        io_parms.pid = current->tgid;
+        io_parms.tcon = pTcon;
+        io_parms.offset = 0;
+        io_parms.length = sizeof(struct win_dev);
         if (S_ISCHR(mode)) {
                 memcpy(pdev->type, "IntxCHR", 8);
                 pdev->major =
                       cpu_to_le64(MAJOR(device_number));
                 pdev->minor =
                       cpu_to_le64(MINOR(device_number));
-                rc = CIFSSMBWrite(xid, pTcon,
-                        fileHandle,
-                        sizeof(struct win_dev),
-                        0, &bytes_written, (char *)pdev,
+                rc = CIFSSMBWrite(xid, &io_parms,
+                        &bytes_written, (char *)pdev,
                         NULL, 0);
         } else if (S_ISBLK(mode)) {
                 memcpy(pdev->type, "IntxBLK", 8);
@@ -456,10 +460,8 @@ int cifs_mknod(struct inode *inode, struct dentry *direntry, int mode,
                       cpu_to_le64(MAJOR(device_number));
                 pdev->minor =
                       cpu_to_le64(MINOR(device_number));
-                rc = CIFSSMBWrite(xid, pTcon,
-                        fileHandle,
-                        sizeof(struct win_dev),
-                        0, &bytes_written, (char *)pdev,
+                rc = CIFSSMBWrite(xid, &io_parms,
+                        &bytes_written, (char *)pdev,
                         NULL, 0);
         } /* else if (S_ISFIFO) */
         CIFSSMBClose(xid, pTcon, fileHandle);