-ssize_t cifs_user_write(struct file *file, const char __user *write_data,
- size_t write_size, loff_t *poffset)
-{
- struct inode *inode = file->f_path.dentry->d_inode;
- int rc = 0;
- unsigned int bytes_written = 0;
- unsigned int total_written;
- struct cifs_sb_info *cifs_sb;
- struct cifsTconInfo *pTcon;
- int xid;
- struct cifsFileInfo *open_file;
- struct cifsInodeInfo *cifsi = CIFS_I(inode);
-
- cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
-
- /* cFYI(1, " write %d bytes to offset %lld of %s", write_size,
- *poffset, file->f_path.dentry->d_name.name); */
-
- if (file->private_data == NULL)
- return -EBADF;
-
- open_file = file->private_data;
- pTcon = tlink_tcon(open_file->tlink);
-
- rc = generic_write_checks(file, poffset, &write_size, 0);
- if (rc)
- return rc;
-
- xid = GetXid();
-
- for (total_written = 0; write_size > total_written;
- total_written += bytes_written) {
- rc = -EAGAIN;
- while (rc == -EAGAIN) {
- if (file->private_data == NULL) {
- /* file has been closed on us */
- FreeXid(xid);
- /* if we have gotten here we have written some data
- and blocked, and the file has been freed on us while
- we blocked so return what we managed to write */
- return total_written;
- }
- if (open_file->invalidHandle) {
- /* we could deadlock if we called
- filemap_fdatawait from here so tell
- reopen_file not to flush data to server
- now */
- rc = cifs_reopen_file(open_file, false);
- if (rc != 0)
- break;
- }
-
- rc = CIFSSMBWrite(xid, pTcon,
- open_file->netfid,
- min_t(const int, cifs_sb->wsize,
- write_size - total_written),
- *poffset, &bytes_written,
- NULL, write_data + total_written, 0);
- }
- if (rc || (bytes_written == 0)) {
- if (total_written)
- break;
- else {
- FreeXid(xid);
- return rc;
- }
- } else {
- cifs_update_eof(cifsi, *poffset, bytes_written);
- *poffset += bytes_written;
- }
- }
-
- cifs_stats_bytes_written(pTcon, total_written);
-
-/* Do not update local mtime - server will set its actual value on write
- * inode->i_ctime = inode->i_mtime =
- * current_fs_time(inode->i_sb);*/
- if (total_written > 0) {
- spin_lock(&inode->i_lock);
- if (*poffset > inode->i_size)
- i_size_write(inode, *poffset);
- spin_unlock(&inode->i_lock);
- }
- mark_inode_dirty_sync(inode);
-
- FreeXid(xid);
- return total_written;
-}
-