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marcus.erl |
/*
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* fs/cifs/readdir.c
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*
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* Directory search handling
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*
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* Copyright (C) International Business Machines Corp., 2004, 2007
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* Author(s): Steve French (sfrench@us.ibm.com)
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*
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* This library is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published
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* by the Free Software Foundation; either version 2.1 of the License, or
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* (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/fs.h>
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#include <linux/pagemap.h>
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#include <linux/stat.h>
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#include "cifspdu.h"
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#include "cifsglob.h"
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#include "cifsproto.h"
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#include "cifs_unicode.h"
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#include "cifs_debug.h"
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#include "cifs_fs_sb.h"
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#include "cifsfs.h"
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#ifdef CONFIG_CIFS_DEBUG2
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static void dump_cifs_file_struct(struct file *file, char *label)
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{
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struct cifsFileInfo *cf;
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if (file) {
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cf = file->private_data;
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if (cf == NULL) {
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cFYI(1, ("empty cifs private file data"));
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return;
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}
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if (cf->invalidHandle) {
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cFYI(1, ("invalid handle"));
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}
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if (cf->srch_inf.endOfSearch) {
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cFYI(1, ("end of search"));
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}
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if (cf->srch_inf.emptyDir) {
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cFYI(1, ("empty dir"));
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}
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}
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}
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#endif /* DEBUG2 */
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/* Returns one if new inode created (which therefore needs to be hashed) */
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/* Might check in the future if inode number changed so we can rehash inode */
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static int construct_dentry(struct qstr *qstring, struct file *file,
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struct inode **ptmp_inode, struct dentry **pnew_dentry)
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{
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struct dentry *tmp_dentry;
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struct cifs_sb_info *cifs_sb;
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struct cifsTconInfo *pTcon;
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int rc = 0;
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cFYI(1, ("For %s", qstring->name));
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cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
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pTcon = cifs_sb->tcon;
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qstring->hash = full_name_hash(qstring->name, qstring->len);
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tmp_dentry = d_lookup(file->f_path.dentry, qstring);
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if (tmp_dentry) {
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cFYI(0, ("existing dentry with inode 0x%p",
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tmp_dentry->d_inode));
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*ptmp_inode = tmp_dentry->d_inode;
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/* BB overwrite old name? i.e. tmp_dentry->d_name and tmp_dentry->d_name.len??*/
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if (*ptmp_inode == NULL) {
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*ptmp_inode = new_inode(file->f_path.dentry->d_sb);
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if (*ptmp_inode == NULL)
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return rc;
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rc = 1;
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}
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if (file->f_path.dentry->d_sb->s_flags & MS_NOATIME)
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(*ptmp_inode)->i_flags |= S_NOATIME | S_NOCMTIME;
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} else {
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tmp_dentry = d_alloc(file->f_path.dentry, qstring);
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| 89 |
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if (tmp_dentry == NULL) {
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| 90 |
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cERROR(1, ("Failed allocating dentry"));
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| 91 |
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*ptmp_inode = NULL;
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| 92 |
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return rc;
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}
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| 94 |
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| 95 |
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*ptmp_inode = new_inode(file->f_path.dentry->d_sb);
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if (pTcon->nocase)
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tmp_dentry->d_op = &cifs_ci_dentry_ops;
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else
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tmp_dentry->d_op = &cifs_dentry_ops;
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if (*ptmp_inode == NULL)
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return rc;
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if (file->f_path.dentry->d_sb->s_flags & MS_NOATIME)
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(*ptmp_inode)->i_flags |= S_NOATIME | S_NOCMTIME;
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rc = 2;
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}
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| 107 |
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tmp_dentry->d_time = jiffies;
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| 108 |
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*pnew_dentry = tmp_dentry;
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| 109 |
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return rc;
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| 110 |
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}
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| 111 |
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| 112 |
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static void AdjustForTZ(struct cifsTconInfo *tcon, struct inode *inode)
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{
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if ((tcon) && (tcon->ses) && (tcon->ses->server)) {
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| 115 |
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inode->i_ctime.tv_sec += tcon->ses->server->timeAdj;
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inode->i_mtime.tv_sec += tcon->ses->server->timeAdj;
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inode->i_atime.tv_sec += tcon->ses->server->timeAdj;
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| 118 |
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}
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return;
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| 120 |
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}
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| 121 |
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| 122 |
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| 123 |
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static void fill_in_inode(struct inode *tmp_inode, int new_buf_type,
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char *buf, unsigned int *pobject_type, int isNewInode)
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{
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| 126 |
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loff_t local_size;
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| 127 |
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struct timespec local_mtime;
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| 129 |
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struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
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struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb);
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__u32 attr;
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__u64 allocation_size;
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| 133 |
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__u64 end_of_file;
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| 135 |
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/* save mtime and size */
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local_mtime = tmp_inode->i_mtime;
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local_size = tmp_inode->i_size;
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| 138 |
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| 139 |
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if (new_buf_type) {
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FILE_DIRECTORY_INFO *pfindData = (FILE_DIRECTORY_INFO *)buf;
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attr = le32_to_cpu(pfindData->ExtFileAttributes);
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allocation_size = le64_to_cpu(pfindData->AllocationSize);
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end_of_file = le64_to_cpu(pfindData->EndOfFile);
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tmp_inode->i_atime =
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cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime));
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tmp_inode->i_mtime =
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cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
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tmp_inode->i_ctime =
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cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
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} else { /* legacy, OS2 and DOS style */
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/* struct timespec ts;*/
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FIND_FILE_STANDARD_INFO * pfindData =
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(FIND_FILE_STANDARD_INFO *)buf;
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tmp_inode->i_mtime = cnvrtDosUnixTm(
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le16_to_cpu(pfindData->LastWriteDate),
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le16_to_cpu(pfindData->LastWriteTime));
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| 159 |
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tmp_inode->i_atime = cnvrtDosUnixTm(
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le16_to_cpu(pfindData->LastAccessDate),
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le16_to_cpu(pfindData->LastAccessTime));
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| 162 |
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tmp_inode->i_ctime = cnvrtDosUnixTm(
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le16_to_cpu(pfindData->LastWriteDate),
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le16_to_cpu(pfindData->LastWriteTime));
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| 165 |
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AdjustForTZ(cifs_sb->tcon, tmp_inode);
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attr = le16_to_cpu(pfindData->Attributes);
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allocation_size = le32_to_cpu(pfindData->AllocationSize);
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| 168 |
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end_of_file = le32_to_cpu(pfindData->DataSize);
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| 169 |
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}
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| 170 |
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| 171 |
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/* Linux can not store file creation time unfortunately so ignore it */
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| 172 |
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| 173 |
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cifsInfo->cifsAttrs = attr;
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| 174 |
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#ifdef CONFIG_CIFS_EXPERIMENTAL
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| 175 |
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if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
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| 176 |
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/* get more accurate mode via ACL - so force inode refresh */
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| 177 |
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cifsInfo->time = 0;
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| 178 |
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} else
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| 179 |
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#endif /* CONFIG_CIFS_EXPERIMENTAL */
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| 180 |
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cifsInfo->time = jiffies;
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| 181 |
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| 182 |
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/* treat dos attribute of read-only as read-only mode bit e.g. 555? */
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| 183 |
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/* 2767 perms - indicate mandatory locking */
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| 184 |
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/* BB fill in uid and gid here? with help from winbind?
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or retrieve from NTFS stream extended attribute */
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| 186 |
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if (atomic_read(&cifsInfo->inUse) == 0) {
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| 187 |
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tmp_inode->i_uid = cifs_sb->mnt_uid;
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| 188 |
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tmp_inode->i_gid = cifs_sb->mnt_gid;
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| 189 |
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/* set default mode. will override for dirs below */
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| 190 |
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tmp_inode->i_mode = cifs_sb->mnt_file_mode;
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| 191 |
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} else {
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| 192 |
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/* mask off the type bits since it gets set
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| 193 |
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below and we do not want to get two type
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| 194 |
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bits set */
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| 195 |
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tmp_inode->i_mode &= ~S_IFMT;
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| 196 |
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}
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| 198 |
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if (attr & ATTR_DIRECTORY) {
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*pobject_type = DT_DIR;
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/* override default perms since we do not lock dirs */
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| 201 |
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if (atomic_read(&cifsInfo->inUse) == 0) {
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| 202 |
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tmp_inode->i_mode = cifs_sb->mnt_dir_mode;
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| 203 |
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}
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| 204 |
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tmp_inode->i_mode |= S_IFDIR;
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} else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
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| 206 |
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(attr & ATTR_SYSTEM)) {
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| 207 |
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if (end_of_file == 0) {
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| 208 |
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*pobject_type = DT_FIFO;
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| 209 |
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tmp_inode->i_mode |= S_IFIFO;
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| 210 |
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} else {
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| 211 |
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/* rather than get the type here, we mark the
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| 212 |
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inode as needing revalidate and get the real type
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| 213 |
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(blk vs chr vs. symlink) later ie in lookup */
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| 214 |
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*pobject_type = DT_REG;
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| 215 |
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tmp_inode->i_mode |= S_IFREG;
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| 216 |
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cifsInfo->time = 0;
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| 217 |
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}
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| 218 |
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/* we no longer mark these because we could not follow them */
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| 219 |
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/* } else if (attr & ATTR_REPARSE) {
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| 220 |
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*pobject_type = DT_LNK;
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| 221 |
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tmp_inode->i_mode |= S_IFLNK; */
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| 222 |
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} else {
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| 223 |
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*pobject_type = DT_REG;
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| 224 |
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tmp_inode->i_mode |= S_IFREG;
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| 225 |
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if (attr & ATTR_READONLY)
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| 226 |
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tmp_inode->i_mode &= ~(S_IWUGO);
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| 227 |
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else if ((tmp_inode->i_mode & S_IWUGO) == 0)
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| 228 |
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/* the ATTR_READONLY flag may have been changed on */
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| 229 |
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/* server -- set any w bits allowed by mnt_file_mode */
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| 230 |
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tmp_inode->i_mode |= (S_IWUGO & cifs_sb->mnt_file_mode);
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| 231 |
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} /* could add code here - to validate if device or weird share type? */
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| 232 |
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|
| 233 |
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/* can not fill in nlink here as in qpathinfo version and Unx search */
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| 234 |
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if (atomic_read(&cifsInfo->inUse) == 0) {
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| 235 |
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atomic_set(&cifsInfo->inUse, 1);
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| 236 |
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}
|
| 237 |
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|
| 238 |
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spin_lock(&tmp_inode->i_lock);
|
| 239 |
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if (is_size_safe_to_change(cifsInfo, end_of_file)) {
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| 240 |
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/* can not safely change the file size here if the
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| 241 |
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client is writing to it due to potential races */
|
| 242 |
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i_size_write(tmp_inode, end_of_file);
|
| 243 |
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|
| 244 |
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/* 512 bytes (2**9) is the fake blocksize that must be used */
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| 245 |
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/* for this calculation, even though the reported blocksize is larger */
|
| 246 |
|
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tmp_inode->i_blocks = (512 - 1 + allocation_size) >> 9;
|
| 247 |
|
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}
|
| 248 |
|
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spin_unlock(&tmp_inode->i_lock);
|
| 249 |
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|
| 250 |
|
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if (allocation_size < end_of_file)
|
| 251 |
|
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cFYI(1, ("May be sparse file, allocation less than file size"));
|
| 252 |
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cFYI(1, ("File Size %ld and blocks %llu",
|
| 253 |
|
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(unsigned long)tmp_inode->i_size,
|
| 254 |
|
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(unsigned long long)tmp_inode->i_blocks));
|
| 255 |
|
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if (S_ISREG(tmp_inode->i_mode)) {
|
| 256 |
|
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cFYI(1, ("File inode"));
|
| 257 |
|
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tmp_inode->i_op = &cifs_file_inode_ops;
|
| 258 |
|
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if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
|
| 259 |
|
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if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
|
| 260 |
|
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tmp_inode->i_fop = &cifs_file_direct_nobrl_ops;
|
| 261 |
|
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else
|
| 262 |
|
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tmp_inode->i_fop = &cifs_file_direct_ops;
|
| 263 |
|
|
} else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
|
| 264 |
|
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tmp_inode->i_fop = &cifs_file_nobrl_ops;
|
| 265 |
|
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else
|
| 266 |
|
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tmp_inode->i_fop = &cifs_file_ops;
|
| 267 |
|
|
|
| 268 |
|
|
if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) &&
|
| 269 |
|
|
(cifs_sb->tcon->ses->server->maxBuf <
|
| 270 |
|
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PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE))
|
| 271 |
|
|
tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
|
| 272 |
|
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else
|
| 273 |
|
|
tmp_inode->i_data.a_ops = &cifs_addr_ops;
|
| 274 |
|
|
|
| 275 |
|
|
if (isNewInode)
|
| 276 |
|
|
return; /* No sense invalidating pages for new inode
|
| 277 |
|
|
since have not started caching readahead file
|
| 278 |
|
|
data yet */
|
| 279 |
|
|
|
| 280 |
|
|
if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
|
| 281 |
|
|
(local_size == tmp_inode->i_size)) {
|
| 282 |
|
|
cFYI(1, ("inode exists but unchanged"));
|
| 283 |
|
|
} else {
|
| 284 |
|
|
/* file may have changed on server */
|
| 285 |
|
|
cFYI(1, ("invalidate inode, readdir detected change"));
|
| 286 |
|
|
invalidate_remote_inode(tmp_inode);
|
| 287 |
|
|
}
|
| 288 |
|
|
} else if (S_ISDIR(tmp_inode->i_mode)) {
|
| 289 |
|
|
cFYI(1, ("Directory inode"));
|
| 290 |
|
|
tmp_inode->i_op = &cifs_dir_inode_ops;
|
| 291 |
|
|
tmp_inode->i_fop = &cifs_dir_ops;
|
| 292 |
|
|
} else if (S_ISLNK(tmp_inode->i_mode)) {
|
| 293 |
|
|
cFYI(1, ("Symbolic Link inode"));
|
| 294 |
|
|
tmp_inode->i_op = &cifs_symlink_inode_ops;
|
| 295 |
|
|
} else {
|
| 296 |
|
|
cFYI(1, ("Init special inode"));
|
| 297 |
|
|
init_special_inode(tmp_inode, tmp_inode->i_mode,
|
| 298 |
|
|
tmp_inode->i_rdev);
|
| 299 |
|
|
}
|
| 300 |
|
|
}
|
| 301 |
|
|
|
| 302 |
|
|
static void unix_fill_in_inode(struct inode *tmp_inode,
|
| 303 |
|
|
FILE_UNIX_INFO *pfindData, unsigned int *pobject_type, int isNewInode)
|
| 304 |
|
|
{
|
| 305 |
|
|
loff_t local_size;
|
| 306 |
|
|
struct timespec local_mtime;
|
| 307 |
|
|
|
| 308 |
|
|
struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
|
| 309 |
|
|
struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb);
|
| 310 |
|
|
|
| 311 |
|
|
__u32 type = le32_to_cpu(pfindData->Type);
|
| 312 |
|
|
__u64 num_of_bytes = le64_to_cpu(pfindData->NumOfBytes);
|
| 313 |
|
|
__u64 end_of_file = le64_to_cpu(pfindData->EndOfFile);
|
| 314 |
|
|
cifsInfo->time = jiffies;
|
| 315 |
|
|
atomic_inc(&cifsInfo->inUse);
|
| 316 |
|
|
|
| 317 |
|
|
/* save mtime and size */
|
| 318 |
|
|
local_mtime = tmp_inode->i_mtime;
|
| 319 |
|
|
local_size = tmp_inode->i_size;
|
| 320 |
|
|
|
| 321 |
|
|
tmp_inode->i_atime =
|
| 322 |
|
|
cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime));
|
| 323 |
|
|
tmp_inode->i_mtime =
|
| 324 |
|
|
cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastModificationTime));
|
| 325 |
|
|
tmp_inode->i_ctime =
|
| 326 |
|
|
cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastStatusChange));
|
| 327 |
|
|
|
| 328 |
|
|
tmp_inode->i_mode = le64_to_cpu(pfindData->Permissions);
|
| 329 |
|
|
/* since we set the inode type below we need to mask off type
|
| 330 |
|
|
to avoid strange results if bits above were corrupt */
|
| 331 |
|
|
tmp_inode->i_mode &= ~S_IFMT;
|
| 332 |
|
|
if (type == UNIX_FILE) {
|
| 333 |
|
|
*pobject_type = DT_REG;
|
| 334 |
|
|
tmp_inode->i_mode |= S_IFREG;
|
| 335 |
|
|
} else if (type == UNIX_SYMLINK) {
|
| 336 |
|
|
*pobject_type = DT_LNK;
|
| 337 |
|
|
tmp_inode->i_mode |= S_IFLNK;
|
| 338 |
|
|
} else if (type == UNIX_DIR) {
|
| 339 |
|
|
*pobject_type = DT_DIR;
|
| 340 |
|
|
tmp_inode->i_mode |= S_IFDIR;
|
| 341 |
|
|
} else if (type == UNIX_CHARDEV) {
|
| 342 |
|
|
*pobject_type = DT_CHR;
|
| 343 |
|
|
tmp_inode->i_mode |= S_IFCHR;
|
| 344 |
|
|
tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor),
|
| 345 |
|
|
le64_to_cpu(pfindData->DevMinor) & MINORMASK);
|
| 346 |
|
|
} else if (type == UNIX_BLOCKDEV) {
|
| 347 |
|
|
*pobject_type = DT_BLK;
|
| 348 |
|
|
tmp_inode->i_mode |= S_IFBLK;
|
| 349 |
|
|
tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor),
|
| 350 |
|
|
le64_to_cpu(pfindData->DevMinor) & MINORMASK);
|
| 351 |
|
|
} else if (type == UNIX_FIFO) {
|
| 352 |
|
|
*pobject_type = DT_FIFO;
|
| 353 |
|
|
tmp_inode->i_mode |= S_IFIFO;
|
| 354 |
|
|
} else if (type == UNIX_SOCKET) {
|
| 355 |
|
|
*pobject_type = DT_SOCK;
|
| 356 |
|
|
tmp_inode->i_mode |= S_IFSOCK;
|
| 357 |
|
|
} else {
|
| 358 |
|
|
/* safest to just call it a file */
|
| 359 |
|
|
*pobject_type = DT_REG;
|
| 360 |
|
|
tmp_inode->i_mode |= S_IFREG;
|
| 361 |
|
|
cFYI(1, ("unknown inode type %d", type));
|
| 362 |
|
|
}
|
| 363 |
|
|
|
| 364 |
|
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
|
| 365 |
|
|
tmp_inode->i_uid = cifs_sb->mnt_uid;
|
| 366 |
|
|
else
|
| 367 |
|
|
tmp_inode->i_uid = le64_to_cpu(pfindData->Uid);
|
| 368 |
|
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
|
| 369 |
|
|
tmp_inode->i_gid = cifs_sb->mnt_gid;
|
| 370 |
|
|
else
|
| 371 |
|
|
tmp_inode->i_gid = le64_to_cpu(pfindData->Gid);
|
| 372 |
|
|
tmp_inode->i_nlink = le64_to_cpu(pfindData->Nlinks);
|
| 373 |
|
|
|
| 374 |
|
|
spin_lock(&tmp_inode->i_lock);
|
| 375 |
|
|
if (is_size_safe_to_change(cifsInfo, end_of_file)) {
|
| 376 |
|
|
/* can not safely change the file size here if the
|
| 377 |
|
|
client is writing to it due to potential races */
|
| 378 |
|
|
i_size_write(tmp_inode, end_of_file);
|
| 379 |
|
|
|
| 380 |
|
|
/* 512 bytes (2**9) is the fake blocksize that must be used */
|
| 381 |
|
|
/* for this calculation, not the real blocksize */
|
| 382 |
|
|
tmp_inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
|
| 383 |
|
|
}
|
| 384 |
|
|
spin_unlock(&tmp_inode->i_lock);
|
| 385 |
|
|
|
| 386 |
|
|
if (S_ISREG(tmp_inode->i_mode)) {
|
| 387 |
|
|
cFYI(1, ("File inode"));
|
| 388 |
|
|
tmp_inode->i_op = &cifs_file_inode_ops;
|
| 389 |
|
|
|
| 390 |
|
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
|
| 391 |
|
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
|
| 392 |
|
|
tmp_inode->i_fop = &cifs_file_direct_nobrl_ops;
|
| 393 |
|
|
else
|
| 394 |
|
|
tmp_inode->i_fop = &cifs_file_direct_ops;
|
| 395 |
|
|
} else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
|
| 396 |
|
|
tmp_inode->i_fop = &cifs_file_nobrl_ops;
|
| 397 |
|
|
else
|
| 398 |
|
|
tmp_inode->i_fop = &cifs_file_ops;
|
| 399 |
|
|
|
| 400 |
|
|
if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) &&
|
| 401 |
|
|
(cifs_sb->tcon->ses->server->maxBuf <
|
| 402 |
|
|
PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE))
|
| 403 |
|
|
tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
|
| 404 |
|
|
else
|
| 405 |
|
|
tmp_inode->i_data.a_ops = &cifs_addr_ops;
|
| 406 |
|
|
|
| 407 |
|
|
if (isNewInode)
|
| 408 |
|
|
return; /* No sense invalidating pages for new inode
|
| 409 |
|
|
since we have not started caching readahead
|
| 410 |
|
|
file data for it yet */
|
| 411 |
|
|
|
| 412 |
|
|
if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
|
| 413 |
|
|
(local_size == tmp_inode->i_size)) {
|
| 414 |
|
|
cFYI(1, ("inode exists but unchanged"));
|
| 415 |
|
|
} else {
|
| 416 |
|
|
/* file may have changed on server */
|
| 417 |
|
|
cFYI(1, ("invalidate inode, readdir detected change"));
|
| 418 |
|
|
invalidate_remote_inode(tmp_inode);
|
| 419 |
|
|
}
|
| 420 |
|
|
} else if (S_ISDIR(tmp_inode->i_mode)) {
|
| 421 |
|
|
cFYI(1, ("Directory inode"));
|
| 422 |
|
|
tmp_inode->i_op = &cifs_dir_inode_ops;
|
| 423 |
|
|
tmp_inode->i_fop = &cifs_dir_ops;
|
| 424 |
|
|
} else if (S_ISLNK(tmp_inode->i_mode)) {
|
| 425 |
|
|
cFYI(1, ("Symbolic Link inode"));
|
| 426 |
|
|
tmp_inode->i_op = &cifs_symlink_inode_ops;
|
| 427 |
|
|
/* tmp_inode->i_fop = *//* do not need to set to anything */
|
| 428 |
|
|
} else {
|
| 429 |
|
|
cFYI(1, ("Special inode"));
|
| 430 |
|
|
init_special_inode(tmp_inode, tmp_inode->i_mode,
|
| 431 |
|
|
tmp_inode->i_rdev);
|
| 432 |
|
|
}
|
| 433 |
|
|
}
|
| 434 |
|
|
|
| 435 |
|
|
static int initiate_cifs_search(const int xid, struct file *file)
|
| 436 |
|
|
{
|
| 437 |
|
|
int rc = 0;
|
| 438 |
|
|
char *full_path;
|
| 439 |
|
|
struct cifsFileInfo *cifsFile;
|
| 440 |
|
|
struct cifs_sb_info *cifs_sb;
|
| 441 |
|
|
struct cifsTconInfo *pTcon;
|
| 442 |
|
|
|
| 443 |
|
|
if (file->private_data == NULL) {
|
| 444 |
|
|
file->private_data =
|
| 445 |
|
|
kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL);
|
| 446 |
|
|
}
|
| 447 |
|
|
|
| 448 |
|
|
if (file->private_data == NULL)
|
| 449 |
|
|
return -ENOMEM;
|
| 450 |
|
|
cifsFile = file->private_data;
|
| 451 |
|
|
cifsFile->invalidHandle = TRUE;
|
| 452 |
|
|
cifsFile->srch_inf.endOfSearch = FALSE;
|
| 453 |
|
|
|
| 454 |
|
|
cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
|
| 455 |
|
|
if (cifs_sb == NULL)
|
| 456 |
|
|
return -EINVAL;
|
| 457 |
|
|
|
| 458 |
|
|
pTcon = cifs_sb->tcon;
|
| 459 |
|
|
if (pTcon == NULL)
|
| 460 |
|
|
return -EINVAL;
|
| 461 |
|
|
|
| 462 |
|
|
full_path = build_path_from_dentry(file->f_path.dentry);
|
| 463 |
|
|
|
| 464 |
|
|
if (full_path == NULL) {
|
| 465 |
|
|
return -ENOMEM;
|
| 466 |
|
|
}
|
| 467 |
|
|
|
| 468 |
|
|
cFYI(1, ("Full path: %s start at: %lld", full_path, file->f_pos));
|
| 469 |
|
|
|
| 470 |
|
|
ffirst_retry:
|
| 471 |
|
|
/* test for Unix extensions */
|
| 472 |
|
|
/* but now check for them on the share/mount not on the SMB session */
|
| 473 |
|
|
/* if (pTcon->ses->capabilities & CAP_UNIX) { */
|
| 474 |
|
|
if (pTcon->unix_ext) {
|
| 475 |
|
|
cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX;
|
| 476 |
|
|
} else if ((pTcon->ses->capabilities &
|
| 477 |
|
|
(CAP_NT_SMBS | CAP_NT_FIND)) == 0) {
|
| 478 |
|
|
cifsFile->srch_inf.info_level = SMB_FIND_FILE_INFO_STANDARD;
|
| 479 |
|
|
} else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
|
| 480 |
|
|
cifsFile->srch_inf.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO;
|
| 481 |
|
|
} else /* not srvinos - BB fixme add check for backlevel? */ {
|
| 482 |
|
|
cifsFile->srch_inf.info_level = SMB_FIND_FILE_DIRECTORY_INFO;
|
| 483 |
|
|
}
|
| 484 |
|
|
|
| 485 |
|
|
rc = CIFSFindFirst(xid, pTcon, full_path, cifs_sb->local_nls,
|
| 486 |
|
|
&cifsFile->netfid, &cifsFile->srch_inf,
|
| 487 |
|
|
cifs_sb->mnt_cifs_flags &
|
| 488 |
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR, CIFS_DIR_SEP(cifs_sb));
|
| 489 |
|
|
if (rc == 0)
|
| 490 |
|
|
cifsFile->invalidHandle = FALSE;
|
| 491 |
|
|
if ((rc == -EOPNOTSUPP) &&
|
| 492 |
|
|
(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
|
| 493 |
|
|
cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM;
|
| 494 |
|
|
goto ffirst_retry;
|
| 495 |
|
|
}
|
| 496 |
|
|
kfree(full_path);
|
| 497 |
|
|
return rc;
|
| 498 |
|
|
}
|
| 499 |
|
|
|
| 500 |
|
|
/* return length of unicode string in bytes */
|
| 501 |
|
|
static int cifs_unicode_bytelen(char *str)
|
| 502 |
|
|
{
|
| 503 |
|
|
int len;
|
| 504 |
|
|
__le16 *ustr = (__le16 *)str;
|
| 505 |
|
|
|
| 506 |
|
|
for (len = 0; len <= PATH_MAX; len++) {
|
| 507 |
|
|
if (ustr[len] == 0)
|
| 508 |
|
|
return len << 1;
|
| 509 |
|
|
}
|
| 510 |
|
|
cFYI(1, ("Unicode string longer than PATH_MAX found"));
|
| 511 |
|
|
return len << 1;
|
| 512 |
|
|
}
|
| 513 |
|
|
|
| 514 |
|
|
static char *nxt_dir_entry(char *old_entry, char *end_of_smb, int level)
|
| 515 |
|
|
{
|
| 516 |
|
|
char *new_entry;
|
| 517 |
|
|
FILE_DIRECTORY_INFO * pDirInfo = (FILE_DIRECTORY_INFO *)old_entry;
|
| 518 |
|
|
|
| 519 |
|
|
if (level == SMB_FIND_FILE_INFO_STANDARD) {
|
| 520 |
|
|
FIND_FILE_STANDARD_INFO * pfData;
|
| 521 |
|
|
pfData = (FIND_FILE_STANDARD_INFO *)pDirInfo;
|
| 522 |
|
|
|
| 523 |
|
|
new_entry = old_entry + sizeof(FIND_FILE_STANDARD_INFO) +
|
| 524 |
|
|
pfData->FileNameLength;
|
| 525 |
|
|
} else
|
| 526 |
|
|
new_entry = old_entry + le32_to_cpu(pDirInfo->NextEntryOffset);
|
| 527 |
|
|
cFYI(1, ("new entry %p old entry %p", new_entry, old_entry));
|
| 528 |
|
|
/* validate that new_entry is not past end of SMB */
|
| 529 |
|
|
if (new_entry >= end_of_smb) {
|
| 530 |
|
|
cERROR(1,
|
| 531 |
|
|
("search entry %p began after end of SMB %p old entry %p",
|
| 532 |
|
|
new_entry, end_of_smb, old_entry));
|
| 533 |
|
|
return NULL;
|
| 534 |
|
|
} else if (((level == SMB_FIND_FILE_INFO_STANDARD) &&
|
| 535 |
|
|
(new_entry + sizeof(FIND_FILE_STANDARD_INFO) > end_of_smb))
|
| 536 |
|
|
|| ((level != SMB_FIND_FILE_INFO_STANDARD) &&
|
| 537 |
|
|
(new_entry + sizeof(FILE_DIRECTORY_INFO) > end_of_smb))) {
|
| 538 |
|
|
cERROR(1, ("search entry %p extends after end of SMB %p",
|
| 539 |
|
|
new_entry, end_of_smb));
|
| 540 |
|
|
return NULL;
|
| 541 |
|
|
} else
|
| 542 |
|
|
return new_entry;
|
| 543 |
|
|
|
| 544 |
|
|
}
|
| 545 |
|
|
|
| 546 |
|
|
#define UNICODE_DOT cpu_to_le16(0x2e)
|
| 547 |
|
|
|
| 548 |
|
|
/* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */
|
| 549 |
|
|
static int cifs_entry_is_dot(char *current_entry, struct cifsFileInfo *cfile)
|
| 550 |
|
|
{
|
| 551 |
|
|
int rc = 0;
|
| 552 |
|
|
char *filename = NULL;
|
| 553 |
|
|
int len = 0;
|
| 554 |
|
|
|
| 555 |
|
|
if (cfile->srch_inf.info_level == SMB_FIND_FILE_UNIX) {
|
| 556 |
|
|
FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry;
|
| 557 |
|
|
filename = &pFindData->FileName[0];
|
| 558 |
|
|
if (cfile->srch_inf.unicode) {
|
| 559 |
|
|
len = cifs_unicode_bytelen(filename);
|
| 560 |
|
|
} else {
|
| 561 |
|
|
/* BB should we make this strnlen of PATH_MAX? */
|
| 562 |
|
|
len = strnlen(filename, 5);
|
| 563 |
|
|
}
|
| 564 |
|
|
} else if (cfile->srch_inf.info_level == SMB_FIND_FILE_DIRECTORY_INFO) {
|
| 565 |
|
|
FILE_DIRECTORY_INFO * pFindData =
|
| 566 |
|
|
(FILE_DIRECTORY_INFO *)current_entry;
|
| 567 |
|
|
filename = &pFindData->FileName[0];
|
| 568 |
|
|
len = le32_to_cpu(pFindData->FileNameLength);
|
| 569 |
|
|
} else if (cfile->srch_inf.info_level ==
|
| 570 |
|
|
SMB_FIND_FILE_FULL_DIRECTORY_INFO) {
|
| 571 |
|
|
FILE_FULL_DIRECTORY_INFO * pFindData =
|
| 572 |
|
|
(FILE_FULL_DIRECTORY_INFO *)current_entry;
|
| 573 |
|
|
filename = &pFindData->FileName[0];
|
| 574 |
|
|
len = le32_to_cpu(pFindData->FileNameLength);
|
| 575 |
|
|
} else if (cfile->srch_inf.info_level ==
|
| 576 |
|
|
SMB_FIND_FILE_ID_FULL_DIR_INFO) {
|
| 577 |
|
|
SEARCH_ID_FULL_DIR_INFO * pFindData =
|
| 578 |
|
|
(SEARCH_ID_FULL_DIR_INFO *)current_entry;
|
| 579 |
|
|
filename = &pFindData->FileName[0];
|
| 580 |
|
|
len = le32_to_cpu(pFindData->FileNameLength);
|
| 581 |
|
|
} else if (cfile->srch_inf.info_level ==
|
| 582 |
|
|
SMB_FIND_FILE_BOTH_DIRECTORY_INFO) {
|
| 583 |
|
|
FILE_BOTH_DIRECTORY_INFO * pFindData =
|
| 584 |
|
|
(FILE_BOTH_DIRECTORY_INFO *)current_entry;
|
| 585 |
|
|
filename = &pFindData->FileName[0];
|
| 586 |
|
|
len = le32_to_cpu(pFindData->FileNameLength);
|
| 587 |
|
|
} else if (cfile->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD) {
|
| 588 |
|
|
FIND_FILE_STANDARD_INFO * pFindData =
|
| 589 |
|
|
(FIND_FILE_STANDARD_INFO *)current_entry;
|
| 590 |
|
|
filename = &pFindData->FileName[0];
|
| 591 |
|
|
len = pFindData->FileNameLength;
|
| 592 |
|
|
} else {
|
| 593 |
|
|
cFYI(1, ("Unknown findfirst level %d",
|
| 594 |
|
|
cfile->srch_inf.info_level));
|
| 595 |
|
|
}
|
| 596 |
|
|
|
| 597 |
|
|
if (filename) {
|
| 598 |
|
|
if (cfile->srch_inf.unicode) {
|
| 599 |
|
|
__le16 *ufilename = (__le16 *)filename;
|
| 600 |
|
|
if (len == 2) {
|
| 601 |
|
|
/* check for . */
|
| 602 |
|
|
if (ufilename[0] == UNICODE_DOT)
|
| 603 |
|
|
rc = 1;
|
| 604 |
|
|
} else if (len == 4) {
|
| 605 |
|
|
/* check for .. */
|
| 606 |
|
|
if ((ufilename[0] == UNICODE_DOT)
|
| 607 |
|
|
&& (ufilename[1] == UNICODE_DOT))
|
| 608 |
|
|
rc = 2;
|
| 609 |
|
|
}
|
| 610 |
|
|
} else /* ASCII */ {
|
| 611 |
|
|
if (len == 1) {
|
| 612 |
|
|
if (filename[0] == '.')
|
| 613 |
|
|
rc = 1;
|
| 614 |
|
|
} else if (len == 2) {
|
| 615 |
|
|
if ((filename[0] == '.') && (filename[1] == '.'))
|
| 616 |
|
|
rc = 2;
|
| 617 |
|
|
}
|
| 618 |
|
|
}
|
| 619 |
|
|
}
|
| 620 |
|
|
|
| 621 |
|
|
return rc;
|
| 622 |
|
|
}
|
| 623 |
|
|
|
| 624 |
|
|
/* Check if directory that we are searching has changed so we can decide
|
| 625 |
|
|
whether we can use the cached search results from the previous search */
|
| 626 |
|
|
static int is_dir_changed(struct file *file)
|
| 627 |
|
|
{
|
| 628 |
|
|
struct inode *inode = file->f_path.dentry->d_inode;
|
| 629 |
|
|
struct cifsInodeInfo *cifsInfo = CIFS_I(inode);
|
| 630 |
|
|
|
| 631 |
|
|
if (cifsInfo->time == 0)
|
| 632 |
|
|
return 1; /* directory was changed, perhaps due to unlink */
|
| 633 |
|
|
else
|
| 634 |
|
|
return 0;
|
| 635 |
|
|
|
| 636 |
|
|
}
|
| 637 |
|
|
|
| 638 |
|
|
/* find the corresponding entry in the search */
|
| 639 |
|
|
/* Note that the SMB server returns search entries for . and .. which
|
| 640 |
|
|
complicates logic here if we choose to parse for them and we do not
|
| 641 |
|
|
assume that they are located in the findfirst return buffer.*/
|
| 642 |
|
|
/* We start counting in the buffer with entry 2 and increment for every
|
| 643 |
|
|
entry (do not increment for . or .. entry) */
|
| 644 |
|
|
static int find_cifs_entry(const int xid, struct cifsTconInfo *pTcon,
|
| 645 |
|
|
struct file *file, char **ppCurrentEntry, int *num_to_ret)
|
| 646 |
|
|
{
|
| 647 |
|
|
int rc = 0;
|
| 648 |
|
|
int pos_in_buf = 0;
|
| 649 |
|
|
loff_t first_entry_in_buffer;
|
| 650 |
|
|
loff_t index_to_find = file->f_pos;
|
| 651 |
|
|
struct cifsFileInfo *cifsFile = file->private_data;
|
| 652 |
|
|
/* check if index in the buffer */
|
| 653 |
|
|
|
| 654 |
|
|
if ((cifsFile == NULL) || (ppCurrentEntry == NULL) ||
|
| 655 |
|
|
(num_to_ret == NULL))
|
| 656 |
|
|
return -ENOENT;
|
| 657 |
|
|
|
| 658 |
|
|
*ppCurrentEntry = NULL;
|
| 659 |
|
|
first_entry_in_buffer =
|
| 660 |
|
|
cifsFile->srch_inf.index_of_last_entry -
|
| 661 |
|
|
cifsFile->srch_inf.entries_in_buffer;
|
| 662 |
|
|
|
| 663 |
|
|
/* if first entry in buf is zero then is first buffer
|
| 664 |
|
|
in search response data which means it is likely . and ..
|
| 665 |
|
|
will be in this buffer, although some servers do not return
|
| 666 |
|
|
. and .. for the root of a drive and for those we need
|
| 667 |
|
|
to start two entries earlier */
|
| 668 |
|
|
|
| 669 |
|
|
#ifdef CONFIG_CIFS_DEBUG2
|
| 670 |
|
|
dump_cifs_file_struct(file, "In fce ");
|
| 671 |
|
|
#endif
|
| 672 |
|
|
if (((index_to_find < cifsFile->srch_inf.index_of_last_entry) &&
|
| 673 |
|
|
is_dir_changed(file)) ||
|
| 674 |
|
|
(index_to_find < first_entry_in_buffer)) {
|
| 675 |
|
|
/* close and restart search */
|
| 676 |
|
|
cFYI(1, ("search backing up - close and restart search"));
|
| 677 |
|
|
cifsFile->invalidHandle = TRUE;
|
| 678 |
|
|
CIFSFindClose(xid, pTcon, cifsFile->netfid);
|
| 679 |
|
|
kfree(cifsFile->search_resume_name);
|
| 680 |
|
|
cifsFile->search_resume_name = NULL;
|
| 681 |
|
|
if (cifsFile->srch_inf.ntwrk_buf_start) {
|
| 682 |
|
|
cFYI(1, ("freeing SMB ff cache buf on search rewind"));
|
| 683 |
|
|
if (cifsFile->srch_inf.smallBuf)
|
| 684 |
|
|
cifs_small_buf_release(cifsFile->srch_inf.
|
| 685 |
|
|
ntwrk_buf_start);
|
| 686 |
|
|
else
|
| 687 |
|
|
cifs_buf_release(cifsFile->srch_inf.
|
| 688 |
|
|
ntwrk_buf_start);
|
| 689 |
|
|
}
|
| 690 |
|
|
rc = initiate_cifs_search(xid, file);
|
| 691 |
|
|
if (rc) {
|
| 692 |
|
|
cFYI(1, ("error %d reinitiating a search on rewind",
|
| 693 |
|
|
rc));
|
| 694 |
|
|
return rc;
|
| 695 |
|
|
}
|
| 696 |
|
|
}
|
| 697 |
|
|
|
| 698 |
|
|
while ((index_to_find >= cifsFile->srch_inf.index_of_last_entry) &&
|
| 699 |
|
|
(rc == 0) && (cifsFile->srch_inf.endOfSearch == FALSE)) {
|
| 700 |
|
|
cFYI(1, ("calling findnext2"));
|
| 701 |
|
|
rc = CIFSFindNext(xid, pTcon, cifsFile->netfid,
|
| 702 |
|
|
&cifsFile->srch_inf);
|
| 703 |
|
|
if (rc)
|
| 704 |
|
|
return -ENOENT;
|
| 705 |
|
|
}
|
| 706 |
|
|
if (index_to_find < cifsFile->srch_inf.index_of_last_entry) {
|
| 707 |
|
|
/* we found the buffer that contains the entry */
|
| 708 |
|
|
/* scan and find it */
|
| 709 |
|
|
int i;
|
| 710 |
|
|
char *current_entry;
|
| 711 |
|
|
char *end_of_smb = cifsFile->srch_inf.ntwrk_buf_start +
|
| 712 |
|
|
smbCalcSize((struct smb_hdr *)
|
| 713 |
|
|
cifsFile->srch_inf.ntwrk_buf_start);
|
| 714 |
|
|
|
| 715 |
|
|
current_entry = cifsFile->srch_inf.srch_entries_start;
|
| 716 |
|
|
first_entry_in_buffer = cifsFile->srch_inf.index_of_last_entry
|
| 717 |
|
|
- cifsFile->srch_inf.entries_in_buffer;
|
| 718 |
|
|
pos_in_buf = index_to_find - first_entry_in_buffer;
|
| 719 |
|
|
cFYI(1, ("found entry - pos_in_buf %d", pos_in_buf));
|
| 720 |
|
|
|
| 721 |
|
|
for (i=0; (i < (pos_in_buf)) && (current_entry != NULL); i++) {
|
| 722 |
|
|
/* go entry by entry figuring out which is first */
|
| 723 |
|
|
current_entry = nxt_dir_entry(current_entry, end_of_smb,
|
| 724 |
|
|
cifsFile->srch_inf.info_level);
|
| 725 |
|
|
}
|
| 726 |
|
|
if ((current_entry == NULL) && (i < pos_in_buf)) {
|
| 727 |
|
|
/* BB fixme - check if we should flag this error */
|
| 728 |
|
|
cERROR(1, ("reached end of buf searching for pos in buf"
|
| 729 |
|
|
" %d index to find %lld rc %d",
|
| 730 |
|
|
pos_in_buf, index_to_find, rc));
|
| 731 |
|
|
}
|
| 732 |
|
|
rc = 0;
|
| 733 |
|
|
*ppCurrentEntry = current_entry;
|
| 734 |
|
|
} else {
|
| 735 |
|
|
cFYI(1, ("index not in buffer - could not findnext into it"));
|
| 736 |
|
|
return 0;
|
| 737 |
|
|
}
|
| 738 |
|
|
|
| 739 |
|
|
if (pos_in_buf >= cifsFile->srch_inf.entries_in_buffer) {
|
| 740 |
|
|
cFYI(1, ("can not return entries pos_in_buf beyond last"));
|
| 741 |
|
|
*num_to_ret = 0;
|
| 742 |
|
|
} else
|
| 743 |
|
|
*num_to_ret = cifsFile->srch_inf.entries_in_buffer - pos_in_buf;
|
| 744 |
|
|
|
| 745 |
|
|
return rc;
|
| 746 |
|
|
}
|
| 747 |
|
|
|
| 748 |
|
|
/* inode num, inode type and filename returned */
|
| 749 |
|
|
static int cifs_get_name_from_search_buf(struct qstr *pqst,
|
| 750 |
|
|
char *current_entry, __u16 level, unsigned int unicode,
|
| 751 |
|
|
struct cifs_sb_info *cifs_sb, int max_len, ino_t *pinum)
|
| 752 |
|
|
{
|
| 753 |
|
|
int rc = 0;
|
| 754 |
|
|
unsigned int len = 0;
|
| 755 |
|
|
char *filename;
|
| 756 |
|
|
struct nls_table *nlt = cifs_sb->local_nls;
|
| 757 |
|
|
|
| 758 |
|
|
*pinum = 0;
|
| 759 |
|
|
|
| 760 |
|
|
if (level == SMB_FIND_FILE_UNIX) {
|
| 761 |
|
|
FILE_UNIX_INFO *pFindData = (FILE_UNIX_INFO *)current_entry;
|
| 762 |
|
|
|
| 763 |
|
|
filename = &pFindData->FileName[0];
|
| 764 |
|
|
if (unicode) {
|
| 765 |
|
|
len = cifs_unicode_bytelen(filename);
|
| 766 |
|
|
} else {
|
| 767 |
|
|
/* BB should we make this strnlen of PATH_MAX? */
|
| 768 |
|
|
len = strnlen(filename, PATH_MAX);
|
| 769 |
|
|
}
|
| 770 |
|
|
|
| 771 |
|
|
/* BB fixme - hash low and high 32 bits if not 64 bit arch BB */
|
| 772 |
|
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
|
| 773 |
|
|
*pinum = pFindData->UniqueId;
|
| 774 |
|
|
} else if (level == SMB_FIND_FILE_DIRECTORY_INFO) {
|
| 775 |
|
|
FILE_DIRECTORY_INFO *pFindData =
|
| 776 |
|
|
(FILE_DIRECTORY_INFO *)current_entry;
|
| 777 |
|
|
filename = &pFindData->FileName[0];
|
| 778 |
|
|
len = le32_to_cpu(pFindData->FileNameLength);
|
| 779 |
|
|
} else if (level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) {
|
| 780 |
|
|
FILE_FULL_DIRECTORY_INFO *pFindData =
|
| 781 |
|
|
(FILE_FULL_DIRECTORY_INFO *)current_entry;
|
| 782 |
|
|
filename = &pFindData->FileName[0];
|
| 783 |
|
|
len = le32_to_cpu(pFindData->FileNameLength);
|
| 784 |
|
|
} else if (level == SMB_FIND_FILE_ID_FULL_DIR_INFO) {
|
| 785 |
|
|
SEARCH_ID_FULL_DIR_INFO *pFindData =
|
| 786 |
|
|
(SEARCH_ID_FULL_DIR_INFO *)current_entry;
|
| 787 |
|
|
filename = &pFindData->FileName[0];
|
| 788 |
|
|
len = le32_to_cpu(pFindData->FileNameLength);
|
| 789 |
|
|
*pinum = pFindData->UniqueId;
|
| 790 |
|
|
} else if (level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) {
|
| 791 |
|
|
FILE_BOTH_DIRECTORY_INFO *pFindData =
|
| 792 |
|
|
(FILE_BOTH_DIRECTORY_INFO *)current_entry;
|
| 793 |
|
|
filename = &pFindData->FileName[0];
|
| 794 |
|
|
len = le32_to_cpu(pFindData->FileNameLength);
|
| 795 |
|
|
} else if (level == SMB_FIND_FILE_INFO_STANDARD) {
|
| 796 |
|
|
FIND_FILE_STANDARD_INFO * pFindData =
|
| 797 |
|
|
(FIND_FILE_STANDARD_INFO *)current_entry;
|
| 798 |
|
|
filename = &pFindData->FileName[0];
|
| 799 |
|
|
/* one byte length, no name conversion */
|
| 800 |
|
|
len = (unsigned int)pFindData->FileNameLength;
|
| 801 |
|
|
} else {
|
| 802 |
|
|
cFYI(1, ("Unknown findfirst level %d", level));
|
| 803 |
|
|
return -EINVAL;
|
| 804 |
|
|
}
|
| 805 |
|
|
|
| 806 |
|
|
if (len > max_len) {
|
| 807 |
|
|
cERROR(1, ("bad search response length %d past smb end", len));
|
| 808 |
|
|
return -EINVAL;
|
| 809 |
|
|
}
|
| 810 |
|
|
|
| 811 |
|
|
if (unicode) {
|
| 812 |
|
|
/* BB fixme - test with long names */
|
| 813 |
|
|
/* Note converted filename can be longer than in unicode */
|
| 814 |
|
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
|
| 815 |
|
|
pqst->len = cifs_convertUCSpath((char *)pqst->name,
|
| 816 |
|
|
(__le16 *)filename, len/2, nlt);
|
| 817 |
|
|
else
|
| 818 |
|
|
pqst->len = cifs_strfromUCS_le((char *)pqst->name,
|
| 819 |
|
|
(__le16 *)filename, len/2, nlt);
|
| 820 |
|
|
} else {
|
| 821 |
|
|
pqst->name = filename;
|
| 822 |
|
|
pqst->len = len;
|
| 823 |
|
|
}
|
| 824 |
|
|
pqst->hash = full_name_hash(pqst->name, pqst->len);
|
| 825 |
|
|
/* cFYI(1, ("filldir on %s",pqst->name)); */
|
| 826 |
|
|
return rc;
|
| 827 |
|
|
}
|
| 828 |
|
|
|
| 829 |
|
|
static int cifs_filldir(char *pfindEntry, struct file *file,
|
| 830 |
|
|
filldir_t filldir, void *direntry, char *scratch_buf, int max_len)
|
| 831 |
|
|
{
|
| 832 |
|
|
int rc = 0;
|
| 833 |
|
|
struct qstr qstring;
|
| 834 |
|
|
struct cifsFileInfo *pCifsF;
|
| 835 |
|
|
unsigned int obj_type;
|
| 836 |
|
|
ino_t inum;
|
| 837 |
|
|
struct cifs_sb_info *cifs_sb;
|
| 838 |
|
|
struct inode *tmp_inode;
|
| 839 |
|
|
struct dentry *tmp_dentry;
|
| 840 |
|
|
|
| 841 |
|
|
/* get filename and len into qstring */
|
| 842 |
|
|
/* get dentry */
|
| 843 |
|
|
/* decide whether to create and populate ionde */
|
| 844 |
|
|
if ((direntry == NULL) || (file == NULL))
|
| 845 |
|
|
return -EINVAL;
|
| 846 |
|
|
|
| 847 |
|
|
pCifsF = file->private_data;
|
| 848 |
|
|
|
| 849 |
|
|
if ((scratch_buf == NULL) || (pfindEntry == NULL) || (pCifsF == NULL))
|
| 850 |
|
|
return -ENOENT;
|
| 851 |
|
|
|
| 852 |
|
|
rc = cifs_entry_is_dot(pfindEntry, pCifsF);
|
| 853 |
|
|
/* skip . and .. since we added them first */
|
| 854 |
|
|
if (rc != 0)
|
| 855 |
|
|
return 0;
|
| 856 |
|
|
|
| 857 |
|
|
cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
|
| 858 |
|
|
|
| 859 |
|
|
qstring.name = scratch_buf;
|
| 860 |
|
|
rc = cifs_get_name_from_search_buf(&qstring, pfindEntry,
|
| 861 |
|
|
pCifsF->srch_inf.info_level,
|
| 862 |
|
|
pCifsF->srch_inf.unicode, cifs_sb,
|
| 863 |
|
|
max_len,
|
| 864 |
|
|
&inum /* returned */);
|
| 865 |
|
|
|
| 866 |
|
|
if (rc)
|
| 867 |
|
|
return rc;
|
| 868 |
|
|
|
| 869 |
|
|
rc = construct_dentry(&qstring, file, &tmp_inode, &tmp_dentry);
|
| 870 |
|
|
if ((tmp_inode == NULL) || (tmp_dentry == NULL))
|
| 871 |
|
|
return -ENOMEM;
|
| 872 |
|
|
|
| 873 |
|
|
if (rc) {
|
| 874 |
|
|
/* inode created, we need to hash it with right inode number */
|
| 875 |
|
|
if (inum != 0) {
|
| 876 |
|
|
/* BB fixme - hash the 2 32 quantities bits together if
|
| 877 |
|
|
* necessary BB */
|
| 878 |
|
|
tmp_inode->i_ino = inum;
|
| 879 |
|
|
}
|
| 880 |
|
|
insert_inode_hash(tmp_inode);
|
| 881 |
|
|
}
|
| 882 |
|
|
|
| 883 |
|
|
/* we pass in rc below, indicating whether it is a new inode,
|
| 884 |
|
|
so we can figure out whether to invalidate the inode cached
|
| 885 |
|
|
data if the file has changed */
|
| 886 |
|
|
if (pCifsF->srch_inf.info_level == SMB_FIND_FILE_UNIX)
|
| 887 |
|
|
unix_fill_in_inode(tmp_inode,
|
| 888 |
|
|
(FILE_UNIX_INFO *)pfindEntry,
|
| 889 |
|
|
&obj_type, rc);
|
| 890 |
|
|
else if (pCifsF->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD)
|
| 891 |
|
|
fill_in_inode(tmp_inode, 0 /* old level 1 buffer type */,
|
| 892 |
|
|
pfindEntry, &obj_type, rc);
|
| 893 |
|
|
else
|
| 894 |
|
|
fill_in_inode(tmp_inode, 1 /* NT */, pfindEntry, &obj_type, rc);
|
| 895 |
|
|
|
| 896 |
|
|
if (rc) /* new inode - needs to be tied to dentry */ {
|
| 897 |
|
|
d_instantiate(tmp_dentry, tmp_inode);
|
| 898 |
|
|
if (rc == 2)
|
| 899 |
|
|
d_rehash(tmp_dentry);
|
| 900 |
|
|
}
|
| 901 |
|
|
|
| 902 |
|
|
|
| 903 |
|
|
rc = filldir(direntry, qstring.name, qstring.len, file->f_pos,
|
| 904 |
|
|
tmp_inode->i_ino, obj_type);
|
| 905 |
|
|
if (rc) {
|
| 906 |
|
|
cFYI(1, ("filldir rc = %d", rc));
|
| 907 |
|
|
/* we can not return filldir errors to the caller
|
| 908 |
|
|
since they are "normal" when the stat blocksize
|
| 909 |
|
|
is too small - we return remapped error instead */
|
| 910 |
|
|
rc = -EOVERFLOW;
|
| 911 |
|
|
}
|
| 912 |
|
|
|
| 913 |
|
|
dput(tmp_dentry);
|
| 914 |
|
|
return rc;
|
| 915 |
|
|
}
|
| 916 |
|
|
|
| 917 |
|
|
static int cifs_save_resume_key(const char *current_entry,
|
| 918 |
|
|
struct cifsFileInfo *cifsFile)
|
| 919 |
|
|
{
|
| 920 |
|
|
int rc = 0;
|
| 921 |
|
|
unsigned int len = 0;
|
| 922 |
|
|
__u16 level;
|
| 923 |
|
|
char *filename;
|
| 924 |
|
|
|
| 925 |
|
|
if ((cifsFile == NULL) || (current_entry == NULL))
|
| 926 |
|
|
return -EINVAL;
|
| 927 |
|
|
|
| 928 |
|
|
level = cifsFile->srch_inf.info_level;
|
| 929 |
|
|
|
| 930 |
|
|
if (level == SMB_FIND_FILE_UNIX) {
|
| 931 |
|
|
FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry;
|
| 932 |
|
|
|
| 933 |
|
|
filename = &pFindData->FileName[0];
|
| 934 |
|
|
if (cifsFile->srch_inf.unicode) {
|
| 935 |
|
|
len = cifs_unicode_bytelen(filename);
|
| 936 |
|
|
} else {
|
| 937 |
|
|
/* BB should we make this strnlen of PATH_MAX? */
|
| 938 |
|
|
len = strnlen(filename, PATH_MAX);
|
| 939 |
|
|
}
|
| 940 |
|
|
cifsFile->srch_inf.resume_key = pFindData->ResumeKey;
|
| 941 |
|
|
} else if (level == SMB_FIND_FILE_DIRECTORY_INFO) {
|
| 942 |
|
|
FILE_DIRECTORY_INFO *pFindData =
|
| 943 |
|
|
(FILE_DIRECTORY_INFO *)current_entry;
|
| 944 |
|
|
filename = &pFindData->FileName[0];
|
| 945 |
|
|
len = le32_to_cpu(pFindData->FileNameLength);
|
| 946 |
|
|
cifsFile->srch_inf.resume_key = pFindData->FileIndex;
|
| 947 |
|
|
} else if (level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) {
|
| 948 |
|
|
FILE_FULL_DIRECTORY_INFO *pFindData =
|
| 949 |
|
|
(FILE_FULL_DIRECTORY_INFO *)current_entry;
|
| 950 |
|
|
filename = &pFindData->FileName[0];
|
| 951 |
|
|
len = le32_to_cpu(pFindData->FileNameLength);
|
| 952 |
|
|
cifsFile->srch_inf.resume_key = pFindData->FileIndex;
|
| 953 |
|
|
} else if (level == SMB_FIND_FILE_ID_FULL_DIR_INFO) {
|
| 954 |
|
|
SEARCH_ID_FULL_DIR_INFO *pFindData =
|
| 955 |
|
|
(SEARCH_ID_FULL_DIR_INFO *)current_entry;
|
| 956 |
|
|
filename = &pFindData->FileName[0];
|
| 957 |
|
|
len = le32_to_cpu(pFindData->FileNameLength);
|
| 958 |
|
|
cifsFile->srch_inf.resume_key = pFindData->FileIndex;
|
| 959 |
|
|
} else if (level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) {
|
| 960 |
|
|
FILE_BOTH_DIRECTORY_INFO *pFindData =
|
| 961 |
|
|
(FILE_BOTH_DIRECTORY_INFO *)current_entry;
|
| 962 |
|
|
filename = &pFindData->FileName[0];
|
| 963 |
|
|
len = le32_to_cpu(pFindData->FileNameLength);
|
| 964 |
|
|
cifsFile->srch_inf.resume_key = pFindData->FileIndex;
|
| 965 |
|
|
} else if (level == SMB_FIND_FILE_INFO_STANDARD) {
|
| 966 |
|
|
FIND_FILE_STANDARD_INFO *pFindData =
|
| 967 |
|
|
(FIND_FILE_STANDARD_INFO *)current_entry;
|
| 968 |
|
|
filename = &pFindData->FileName[0];
|
| 969 |
|
|
/* one byte length, no name conversion */
|
| 970 |
|
|
len = (unsigned int)pFindData->FileNameLength;
|
| 971 |
|
|
cifsFile->srch_inf.resume_key = pFindData->ResumeKey;
|
| 972 |
|
|
} else {
|
| 973 |
|
|
cFYI(1, ("Unknown findfirst level %d", level));
|
| 974 |
|
|
return -EINVAL;
|
| 975 |
|
|
}
|
| 976 |
|
|
cifsFile->srch_inf.resume_name_len = len;
|
| 977 |
|
|
cifsFile->srch_inf.presume_name = filename;
|
| 978 |
|
|
return rc;
|
| 979 |
|
|
}
|
| 980 |
|
|
|
| 981 |
|
|
int cifs_readdir(struct file *file, void *direntry, filldir_t filldir)
|
| 982 |
|
|
{
|
| 983 |
|
|
int rc = 0;
|
| 984 |
|
|
int xid, i;
|
| 985 |
|
|
struct cifs_sb_info *cifs_sb;
|
| 986 |
|
|
struct cifsTconInfo *pTcon;
|
| 987 |
|
|
struct cifsFileInfo *cifsFile = NULL;
|
| 988 |
|
|
char *current_entry;
|
| 989 |
|
|
int num_to_fill = 0;
|
| 990 |
|
|
char *tmp_buf = NULL;
|
| 991 |
|
|
char *end_of_smb;
|
| 992 |
|
|
int max_len;
|
| 993 |
|
|
|
| 994 |
|
|
xid = GetXid();
|
| 995 |
|
|
|
| 996 |
|
|
cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
|
| 997 |
|
|
pTcon = cifs_sb->tcon;
|
| 998 |
|
|
if (pTcon == NULL)
|
| 999 |
|
|
return -EINVAL;
|
| 1000 |
|
|
|
| 1001 |
|
|
switch ((int) file->f_pos) {
|
| 1002 |
|
|
case 0:
|
| 1003 |
|
|
if (filldir(direntry, ".", 1, file->f_pos,
|
| 1004 |
|
|
file->f_path.dentry->d_inode->i_ino, DT_DIR) < 0) {
|
| 1005 |
|
|
cERROR(1, ("Filldir for current dir failed"));
|
| 1006 |
|
|
rc = -ENOMEM;
|
| 1007 |
|
|
break;
|
| 1008 |
|
|
}
|
| 1009 |
|
|
file->f_pos++;
|
| 1010 |
|
|
case 1:
|
| 1011 |
|
|
if (filldir(direntry, "..", 2, file->f_pos,
|
| 1012 |
|
|
file->f_path.dentry->d_parent->d_inode->i_ino, DT_DIR) < 0) {
|
| 1013 |
|
|
cERROR(1, ("Filldir for parent dir failed"));
|
| 1014 |
|
|
rc = -ENOMEM;
|
| 1015 |
|
|
break;
|
| 1016 |
|
|
}
|
| 1017 |
|
|
file->f_pos++;
|
| 1018 |
|
|
default:
|
| 1019 |
|
|
/* 1) If search is active,
|
| 1020 |
|
|
is in current search buffer?
|
| 1021 |
|
|
if it before then restart search
|
| 1022 |
|
|
if after then keep searching till find it */
|
| 1023 |
|
|
|
| 1024 |
|
|
if (file->private_data == NULL) {
|
| 1025 |
|
|
rc = initiate_cifs_search(xid, file);
|
| 1026 |
|
|
cFYI(1, ("initiate cifs search rc %d", rc));
|
| 1027 |
|
|
if (rc) {
|
| 1028 |
|
|
FreeXid(xid);
|
| 1029 |
|
|
return rc;
|
| 1030 |
|
|
}
|
| 1031 |
|
|
}
|
| 1032 |
|
|
if (file->private_data == NULL) {
|
| 1033 |
|
|
rc = -EINVAL;
|
| 1034 |
|
|
FreeXid(xid);
|
| 1035 |
|
|
return rc;
|
| 1036 |
|
|
}
|
| 1037 |
|
|
cifsFile = file->private_data;
|
| 1038 |
|
|
if (cifsFile->srch_inf.endOfSearch) {
|
| 1039 |
|
|
if (cifsFile->srch_inf.emptyDir) {
|
| 1040 |
|
|
cFYI(1, ("End of search, empty dir"));
|
| 1041 |
|
|
rc = 0;
|
| 1042 |
|
|
break;
|
| 1043 |
|
|
}
|
| 1044 |
|
|
} /* else {
|
| 1045 |
|
|
cifsFile->invalidHandle = TRUE;
|
| 1046 |
|
|
CIFSFindClose(xid, pTcon, cifsFile->netfid);
|
| 1047 |
|
|
}
|
| 1048 |
|
|
kfree(cifsFile->search_resume_name);
|
| 1049 |
|
|
cifsFile->search_resume_name = NULL; */
|
| 1050 |
|
|
|
| 1051 |
|
|
rc = find_cifs_entry(xid, pTcon, file,
|
| 1052 |
|
|
¤t_entry, &num_to_fill);
|
| 1053 |
|
|
if (rc) {
|
| 1054 |
|
|
cFYI(1, ("fce error %d", rc));
|
| 1055 |
|
|
goto rddir2_exit;
|
| 1056 |
|
|
} else if (current_entry != NULL) {
|
| 1057 |
|
|
cFYI(1, ("entry %lld found", file->f_pos));
|
| 1058 |
|
|
} else {
|
| 1059 |
|
|
cFYI(1, ("could not find entry"));
|
| 1060 |
|
|
goto rddir2_exit;
|
| 1061 |
|
|
}
|
| 1062 |
|
|
cFYI(1, ("loop through %d times filling dir for net buf %p",
|
| 1063 |
|
|
num_to_fill, cifsFile->srch_inf.ntwrk_buf_start));
|
| 1064 |
|
|
max_len = smbCalcSize((struct smb_hdr *)
|
| 1065 |
|
|
cifsFile->srch_inf.ntwrk_buf_start);
|
| 1066 |
|
|
end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + max_len;
|
| 1067 |
|
|
|
| 1068 |
|
|
/* To be safe - for UCS to UTF-8 with strings loaded
|
| 1069 |
|
|
with the rare long characters alloc more to account for
|
| 1070 |
|
|
such multibyte target UTF-8 characters. cifs_unicode.c,
|
| 1071 |
|
|
which actually does the conversion, has the same limit */
|
| 1072 |
|
|
tmp_buf = kmalloc((2 * NAME_MAX) + 4, GFP_KERNEL);
|
| 1073 |
|
|
for (i = 0; (i < num_to_fill) && (rc == 0); i++) {
|
| 1074 |
|
|
if (current_entry == NULL) {
|
| 1075 |
|
|
/* evaluate whether this case is an error */
|
| 1076 |
|
|
cERROR(1, ("past SMB end, num to fill %d i %d",
|
| 1077 |
|
|
num_to_fill, i));
|
| 1078 |
|
|
break;
|
| 1079 |
|
|
}
|
| 1080 |
|
|
/* if buggy server returns . and .. late do
|
| 1081 |
|
|
we want to check for that here? */
|
| 1082 |
|
|
rc = cifs_filldir(current_entry, file,
|
| 1083 |
|
|
filldir, direntry, tmp_buf, max_len);
|
| 1084 |
|
|
if (rc == -EOVERFLOW) {
|
| 1085 |
|
|
rc = 0;
|
| 1086 |
|
|
break;
|
| 1087 |
|
|
}
|
| 1088 |
|
|
|
| 1089 |
|
|
file->f_pos++;
|
| 1090 |
|
|
if (file->f_pos ==
|
| 1091 |
|
|
cifsFile->srch_inf.index_of_last_entry) {
|
| 1092 |
|
|
cFYI(1, ("last entry in buf at pos %lld %s",
|
| 1093 |
|
|
file->f_pos, tmp_buf));
|
| 1094 |
|
|
cifs_save_resume_key(current_entry, cifsFile);
|
| 1095 |
|
|
break;
|
| 1096 |
|
|
} else
|
| 1097 |
|
|
current_entry =
|
| 1098 |
|
|
nxt_dir_entry(current_entry, end_of_smb,
|
| 1099 |
|
|
cifsFile->srch_inf.info_level);
|
| 1100 |
|
|
}
|
| 1101 |
|
|
kfree(tmp_buf);
|
| 1102 |
|
|
break;
|
| 1103 |
|
|
} /* end switch */
|
| 1104 |
|
|
|
| 1105 |
|
|
rddir2_exit:
|
| 1106 |
|
|
FreeXid(xid);
|
| 1107 |
|
|
return rc;
|
| 1108 |
|
|
}
|
