path: root/fs/cifs/inode.c

/*
 *   fs/cifs/inode.c
 *
 *   Copyright (C) International Business Machines  Corp., 2002,2005
 *   Author(s): Steve French (sfrench@us.ibm.com)
 *
 *   This library is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU Lesser General Public License as published
 *   by the Free Software Foundation; either version 2.1 of the License, or
 *   (at your option) any later version.
 *
 *   This library is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
 *   the GNU Lesser General Public License for more details.
 *
 *   You should have received a copy of the GNU Lesser General Public License
 *   along with this library; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
#include <linux/fs.h>
#include <linux/buffer_head.h>
#include <linux/stat.h>
#include <linux/pagemap.h>
#include <asm/div64.h>
#include "cifsfs.h"
#include "cifspdu.h"
#include "cifsglob.h"
#include "cifsproto.h"
#include "cifs_debug.h"
#include "cifs_fs_sb.h"

int cifs_get_inode_info_unix(struct inode **pinode,
	const unsigned char *search_path, struct super_block *sb, int xid)
{
	int rc = 0;
	FILE_UNIX_BASIC_INFO findData;
	struct cifsTconInfo *pTcon;
	struct inode *inode;
	struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
	char *tmp_path;

	pTcon = cifs_sb->tcon;
	cFYI(1, (" Getting info on %s ", search_path));
	/* could have done a find first instead but this returns more info */
	rc = CIFSSMBUnixQPathInfo(xid, pTcon, search_path, &findData,
				  cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
					CIFS_MOUNT_MAP_SPECIAL_CHR);
/*	dump_mem("\nUnixQPathInfo return data", &findData,
		 sizeof(findData)); */
	if (rc) {
		if (rc == -EREMOTE) {
			tmp_path =
			    kmalloc(strnlen(pTcon->treeName,
					    MAX_TREE_SIZE + 1) +
				    strnlen(search_path, MAX_PATHCONF) + 1,
				    GFP_KERNEL);
			if (tmp_path == NULL) {
				return -ENOMEM;
			}
        		/* have to skip first of the double backslash of
			   UNC name */
			strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE);
			strncat(tmp_path, search_path, MAX_PATHCONF);
			rc = connect_to_dfs_path(xid, pTcon->ses,
						 /* treename + */ tmp_path,
						 cifs_sb->local_nls, 
						 cifs_sb->mnt_cifs_flags & 
						    CIFS_MOUNT_MAP_SPECIAL_CHR);
			kfree(tmp_path);

			/* BB fix up inode etc. */
		} else if (rc) {
			return rc;
		}
	} else {
		struct cifsInodeInfo *cifsInfo;
		__u32 type = le32_to_cpu(findData.Type);
		__u64 num_of_bytes = le64_to_cpu(findData.NumOfBytes);
		__u64 end_of_file = le64_to_cpu(findData.EndOfFile);

		/* get new inode */
		if (*pinode == NULL) {
			*pinode = new_inode(sb);
			if(*pinode == NULL) 
				return -ENOMEM;
			/* Is an i_ino of zero legal? */
			/* Are there sanity checks we can use to ensure that
			   the server is really filling in that field? */
			if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
				(*pinode)->i_ino =
					(unsigned long)findData.UniqueId;
			} /* note ino incremented to unique num in new_inode */
			insert_inode_hash(*pinode);
		}

		inode = *pinode;
		cifsInfo = CIFS_I(inode);

		cFYI(1, (" Old time %ld ", cifsInfo->time));
		cifsInfo->time = jiffies;
		cFYI(1, (" New time %ld ", cifsInfo->time));
		/* this is ok to set on every inode revalidate */
		atomic_set(&cifsInfo->inUse,1);

		inode->i_atime =
		    cifs_NTtimeToUnix(le64_to_cpu(findData.LastAccessTime));
		inode->i_mtime =
		    cifs_NTtimeToUnix(le64_to_cpu
				(findData