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62 |
marcus.erl |
/*
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| 2 |
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* fs/cifs/dir.c
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*
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* vfs operations that deal with dentries
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*
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* Copyright (C) International Business Machines Corp., 2002,2007
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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/stat.h>
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#include <linux/slab.h>
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| 26 |
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#include <linux/namei.h>
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#include "cifsfs.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_debug.h"
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#include "cifs_fs_sb.h"
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| 34 |
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static void
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renew_parental_timestamps(struct dentry *direntry)
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{
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| 37 |
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/* BB check if there is a way to get the kernel to do this or if we
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really need this */
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do {
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direntry->d_time = jiffies;
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direntry = direntry->d_parent;
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} while (!IS_ROOT(direntry));
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}
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| 45 |
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/* Note: caller must free return buffer */
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char *
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build_path_from_dentry(struct dentry *direntry)
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{
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| 49 |
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struct dentry *temp;
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| 50 |
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int namelen;
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| 51 |
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int pplen;
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| 52 |
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char *full_path;
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| 53 |
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char dirsep;
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| 54 |
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| 55 |
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if (direntry == NULL)
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return NULL; /* not much we can do if dentry is freed and
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we need to reopen the file after it was closed implicitly
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when the server crashed */
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| 60 |
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dirsep = CIFS_DIR_SEP(CIFS_SB(direntry->d_sb));
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pplen = CIFS_SB(direntry->d_sb)->prepathlen;
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cifs_bp_rename_retry:
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namelen = pplen;
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for (temp = direntry; !IS_ROOT(temp);) {
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namelen += (1 + temp->d_name.len);
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temp = temp->d_parent;
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| 67 |
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if (temp == NULL) {
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| 68 |
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cERROR(1, ("corrupt dentry"));
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| 69 |
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return NULL;
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| 70 |
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}
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}
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| 73 |
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full_path = kmalloc(namelen+1, GFP_KERNEL);
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if (full_path == NULL)
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return full_path;
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full_path[namelen] = 0; /* trailing null */
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for (temp = direntry; !IS_ROOT(temp);) {
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namelen -= 1 + temp->d_name.len;
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| 79 |
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if (namelen < 0) {
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break;
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| 81 |
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} else {
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full_path[namelen] = dirsep;
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strncpy(full_path + namelen + 1, temp->d_name.name,
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temp->d_name.len);
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cFYI(0, ("name: %s", full_path + namelen));
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}
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| 87 |
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temp = temp->d_parent;
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if (temp == NULL) {
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cERROR(1, ("corrupt dentry"));
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| 90 |
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kfree(full_path);
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return NULL;
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}
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| 93 |
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}
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| 94 |
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if (namelen != pplen) {
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cERROR(1,
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("did not end path lookup where expected namelen is %d",
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namelen));
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/* presumably this is only possible if racing with a rename
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of one of the parent directories (we can not lock the dentries
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above us to prevent this, but retrying should be harmless) */
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kfree(full_path);
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goto cifs_bp_rename_retry;
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| 103 |
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}
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/* DIR_SEP already set for byte 0 / vs \ but not for
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subsequent slashes in prepath which currently must
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be entered the right way - not sure if there is an alternative
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since the '\' is a valid posix character so we can not switch
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those safely to '/' if any are found in the middle of the prepath */
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/* BB test paths to Windows with '/' in the midst of prepath */
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strncpy(full_path, CIFS_SB(direntry->d_sb)->prepath, pplen);
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return full_path;
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}
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| 114 |
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/* char * build_wildcard_path_from_dentry(struct dentry *direntry)
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{
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if(full_path == NULL)
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return full_path;
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| 119 |
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full_path[namelen] = '\\';
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full_path[namelen+1] = '*';
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full_path[namelen+2] = 0;
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BB remove above eight lines BB */
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/* Inode operations in similar order to how they appear in Linux file fs.h */
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int
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cifs_create(struct inode *inode, struct dentry *direntry, int mode,
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struct nameidata *nd)
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{
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int rc = -ENOENT;
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int xid;
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| 132 |
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int oplock = 0;
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int desiredAccess = GENERIC_READ | GENERIC_WRITE;
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__u16 fileHandle;
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struct cifs_sb_info *cifs_sb;
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struct cifsTconInfo *pTcon;
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char *full_path = NULL;
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FILE_ALL_INFO *buf = NULL;
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struct inode *newinode = NULL;
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struct cifsFileInfo *pCifsFile = NULL;
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struct cifsInodeInfo *pCifsInode;
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int disposition = FILE_OVERWRITE_IF;
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int write_only = FALSE;
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xid = GetXid();
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| 146 |
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cifs_sb = CIFS_SB(inode->i_sb);
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pTcon = cifs_sb->tcon;
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full_path = build_path_from_dentry(direntry);
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if (full_path == NULL) {
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FreeXid(xid);
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return -ENOMEM;
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}
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if (nd && (nd->flags & LOOKUP_OPEN)) {
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int oflags = nd->intent.open.flags;
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desiredAccess = 0;
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if (oflags & FMODE_READ)
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desiredAccess |= GENERIC_READ;
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if (oflags & FMODE_WRITE) {
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desiredAccess |= GENERIC_WRITE;
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if (!(oflags & FMODE_READ))
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write_only = TRUE;
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}
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| 168 |
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if ((oflags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL))
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disposition = FILE_CREATE;
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| 170 |
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else if ((oflags & (O_CREAT | O_TRUNC)) == (O_CREAT | O_TRUNC))
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disposition = FILE_OVERWRITE_IF;
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else if ((oflags & O_CREAT) == O_CREAT)
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disposition = FILE_OPEN_IF;
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| 174 |
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else {
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| 175 |
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cFYI(1, ("Create flag not set in create function"));
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| 176 |
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}
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| 177 |
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}
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| 178 |
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| 179 |
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/* BB add processing to set equivalent of mode - e.g. via CreateX with
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| 180 |
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ACLs */
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| 181 |
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if (oplockEnabled)
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| 182 |
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oplock = REQ_OPLOCK;
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| 183 |
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|
| 184 |
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buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
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| 185 |
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if (buf == NULL) {
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| 186 |
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kfree(full_path);
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| 187 |
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FreeXid(xid);
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| 188 |
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return -ENOMEM;
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| 189 |
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}
|
| 190 |
|
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if (cifs_sb->tcon->ses->capabilities & CAP_NT_SMBS)
|
| 191 |
|
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rc = CIFSSMBOpen(xid, pTcon, full_path, disposition,
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| 192 |
|
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desiredAccess, CREATE_NOT_DIR,
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| 193 |
|
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&fileHandle, &oplock, buf, cifs_sb->local_nls,
|
| 194 |
|
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cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
|
| 195 |
|
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else
|
| 196 |
|
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rc = -EIO; /* no NT SMB support fall into legacy open below */
|
| 197 |
|
|
|
| 198 |
|
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if (rc == -EIO) {
|
| 199 |
|
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/* old server, retry the open legacy style */
|
| 200 |
|
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rc = SMBLegacyOpen(xid, pTcon, full_path, disposition,
|
| 201 |
|
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desiredAccess, CREATE_NOT_DIR,
|
| 202 |
|
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&fileHandle, &oplock, buf, cifs_sb->local_nls,
|
| 203 |
|
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cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
|
| 204 |
|
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}
|
| 205 |
|
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if (rc) {
|
| 206 |
|
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cFYI(1, ("cifs_create returned 0x%x", rc));
|
| 207 |
|
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} else {
|
| 208 |
|
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/* If Open reported that we actually created a file
|
| 209 |
|
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then we now have to set the mode if possible */
|
| 210 |
|
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if ((pTcon->unix_ext) && (oplock & CIFS_CREATE_ACTION)) {
|
| 211 |
|
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mode &= ~current->fs->umask;
|
| 212 |
|
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if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
|
| 213 |
|
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CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode,
|
| 214 |
|
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(__u64)current->fsuid,
|
| 215 |
|
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(__u64)current->fsgid,
|
| 216 |
|
|
|
| 217 |
|
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cifs_sb->local_nls,
|
| 218 |
|
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cifs_sb->mnt_cifs_flags &
|
| 219 |
|
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CIFS_MOUNT_MAP_SPECIAL_CHR);
|
| 220 |
|
|
} else {
|
| 221 |
|
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CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode,
|
| 222 |
|
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(__u64)-1,
|
| 223 |
|
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(__u64)-1,
|
| 224 |
|
|
|
| 225 |
|
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cifs_sb->local_nls,
|
| 226 |
|
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cifs_sb->mnt_cifs_flags &
|
| 227 |
|
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CIFS_MOUNT_MAP_SPECIAL_CHR);
|
| 228 |
|
|
}
|
| 229 |
|
|
} else {
|
| 230 |
|
|
/* BB implement mode setting via Windows security
|
| 231 |
|
|
descriptors e.g. */
|
| 232 |
|
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/* CIFSSMBWinSetPerms(xid,pTcon,path,mode,-1,-1,nls);*/
|
| 233 |
|
|
|
| 234 |
|
|
/* Could set r/o dos attribute if mode & 0222 == 0 */
|
| 235 |
|
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}
|
| 236 |
|
|
|
| 237 |
|
|
/* server might mask mode so we have to query for it */
|
| 238 |
|
|
if (pTcon->unix_ext)
|
| 239 |
|
|
rc = cifs_get_inode_info_unix(&newinode, full_path,
|
| 240 |
|
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inode->i_sb, xid);
|
| 241 |
|
|
else {
|
| 242 |
|
|
rc = cifs_get_inode_info(&newinode, full_path,
|
| 243 |
|
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buf, inode->i_sb, xid);
|
| 244 |
|
|
if (newinode) {
|
| 245 |
|
|
newinode->i_mode = mode;
|
| 246 |
|
|
if ((oplock & CIFS_CREATE_ACTION) &&
|
| 247 |
|
|
(cifs_sb->mnt_cifs_flags &
|
| 248 |
|
|
CIFS_MOUNT_SET_UID)) {
|
| 249 |
|
|
newinode->i_uid = current->fsuid;
|
| 250 |
|
|
newinode->i_gid = current->fsgid;
|
| 251 |
|
|
}
|
| 252 |
|
|
}
|
| 253 |
|
|
}
|
| 254 |
|
|
|
| 255 |
|
|
if (rc != 0) {
|
| 256 |
|
|
cFYI(1,
|
| 257 |
|
|
("Create worked but get_inode_info failed rc = %d",
|
| 258 |
|
|
rc));
|
| 259 |
|
|
} else {
|
| 260 |
|
|
if (pTcon->nocase)
|
| 261 |
|
|
direntry->d_op = &cifs_ci_dentry_ops;
|
| 262 |
|
|
else
|
| 263 |
|
|
direntry->d_op = &cifs_dentry_ops;
|
| 264 |
|
|
d_instantiate(direntry, newinode);
|
| 265 |
|
|
}
|
| 266 |
|
|
if ((nd == NULL /* nfsd case - nfs srv does not set nd */) ||
|
| 267 |
|
|
((nd->flags & LOOKUP_OPEN) == FALSE)) {
|
| 268 |
|
|
/* mknod case - do not leave file open */
|
| 269 |
|
|
CIFSSMBClose(xid, pTcon, fileHandle);
|
| 270 |
|
|
} else if (newinode) {
|
| 271 |
|
|
pCifsFile =
|
| 272 |
|
|
kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL);
|
| 273 |
|
|
|
| 274 |
|
|
if (pCifsFile == NULL)
|
| 275 |
|
|
goto cifs_create_out;
|
| 276 |
|
|
pCifsFile->netfid = fileHandle;
|
| 277 |
|
|
pCifsFile->pid = current->tgid;
|
| 278 |
|
|
pCifsFile->pInode = newinode;
|
| 279 |
|
|
pCifsFile->invalidHandle = FALSE;
|
| 280 |
|
|
pCifsFile->closePend = FALSE;
|
| 281 |
|
|
init_MUTEX(&pCifsFile->fh_sem);
|
| 282 |
|
|
mutex_init(&pCifsFile->lock_mutex);
|
| 283 |
|
|
INIT_LIST_HEAD(&pCifsFile->llist);
|
| 284 |
|
|
atomic_set(&pCifsFile->wrtPending, 0);
|
| 285 |
|
|
|
| 286 |
|
|
/* set the following in open now
|
| 287 |
|
|
pCifsFile->pfile = file; */
|
| 288 |
|
|
write_lock(&GlobalSMBSeslock);
|
| 289 |
|
|
list_add(&pCifsFile->tlist, &pTcon->openFileList);
|
| 290 |
|
|
pCifsInode = CIFS_I(newinode);
|
| 291 |
|
|
if (pCifsInode) {
|
| 292 |
|
|
/* if readable file instance put first in list*/
|
| 293 |
|
|
if (write_only == TRUE) {
|
| 294 |
|
|
list_add_tail(&pCifsFile->flist,
|
| 295 |
|
|
&pCifsInode->openFileList);
|
| 296 |
|
|
} else {
|
| 297 |
|
|
list_add(&pCifsFile->flist,
|
| 298 |
|
|
&pCifsInode->openFileList);
|
| 299 |
|
|
}
|
| 300 |
|
|
if ((oplock & 0xF) == OPLOCK_EXCLUSIVE) {
|
| 301 |
|
|
pCifsInode->clientCanCacheAll = TRUE;
|
| 302 |
|
|
pCifsInode->clientCanCacheRead = TRUE;
|
| 303 |
|
|
cFYI(1, ("Exclusive Oplock inode %p",
|
| 304 |
|
|
newinode));
|
| 305 |
|
|
} else if ((oplock & 0xF) == OPLOCK_READ)
|
| 306 |
|
|
pCifsInode->clientCanCacheRead = TRUE;
|
| 307 |
|
|
}
|
| 308 |
|
|
write_unlock(&GlobalSMBSeslock);
|
| 309 |
|
|
}
|
| 310 |
|
|
}
|
| 311 |
|
|
cifs_create_out:
|
| 312 |
|
|
kfree(buf);
|
| 313 |
|
|
kfree(full_path);
|
| 314 |
|
|
FreeXid(xid);
|
| 315 |
|
|
return rc;
|
| 316 |
|
|
}
|
| 317 |
|
|
|
| 318 |
|
|
int cifs_mknod(struct inode *inode, struct dentry *direntry, int mode,
|
| 319 |
|
|
dev_t device_number)
|
| 320 |
|
|
{
|
| 321 |
|
|
int rc = -EPERM;
|
| 322 |
|
|
int xid;
|
| 323 |
|
|
struct cifs_sb_info *cifs_sb;
|
| 324 |
|
|
struct cifsTconInfo *pTcon;
|
| 325 |
|
|
char *full_path = NULL;
|
| 326 |
|
|
struct inode *newinode = NULL;
|
| 327 |
|
|
|
| 328 |
|
|
if (!old_valid_dev(device_number))
|
| 329 |
|
|
return -EINVAL;
|
| 330 |
|
|
|
| 331 |
|
|
xid = GetXid();
|
| 332 |
|
|
|
| 333 |
|
|
cifs_sb = CIFS_SB(inode->i_sb);
|
| 334 |
|
|
pTcon = cifs_sb->tcon;
|
| 335 |
|
|
|
| 336 |
|
|
full_path = build_path_from_dentry(direntry);
|
| 337 |
|
|
if (full_path == NULL)
|
| 338 |
|
|
rc = -ENOMEM;
|
| 339 |
|
|
else if (pTcon->unix_ext) {
|
| 340 |
|
|
mode &= ~current->fs->umask;
|
| 341 |
|
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
|
| 342 |
|
|
rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path,
|
| 343 |
|
|
mode, (__u64)current->fsuid,
|
| 344 |
|
|
(__u64)current->fsgid,
|
| 345 |
|
|
device_number, cifs_sb->local_nls,
|
| 346 |
|
|
cifs_sb->mnt_cifs_flags &
|
| 347 |
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
| 348 |
|
|
} else {
|
| 349 |
|
|
rc = CIFSSMBUnixSetPerms(xid, pTcon,
|
| 350 |
|
|
full_path, mode, (__u64)-1, (__u64)-1,
|
| 351 |
|
|
device_number, cifs_sb->local_nls,
|
| 352 |
|
|
cifs_sb->mnt_cifs_flags &
|
| 353 |
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
| 354 |
|
|
}
|
| 355 |
|
|
|
| 356 |
|
|
if (!rc) {
|
| 357 |
|
|
rc = cifs_get_inode_info_unix(&newinode, full_path,
|
| 358 |
|
|
inode->i_sb, xid);
|
| 359 |
|
|
if (pTcon->nocase)
|
| 360 |
|
|
direntry->d_op = &cifs_ci_dentry_ops;
|
| 361 |
|
|
else
|
| 362 |
|
|
direntry->d_op = &cifs_dentry_ops;
|
| 363 |
|
|
if (rc == 0)
|
| 364 |
|
|
d_instantiate(direntry, newinode);
|
| 365 |
|
|
}
|
| 366 |
|
|
} else {
|
| 367 |
|
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
|
| 368 |
|
|
int oplock = 0;
|
| 369 |
|
|
u16 fileHandle;
|
| 370 |
|
|
FILE_ALL_INFO * buf;
|
| 371 |
|
|
|
| 372 |
|
|
cFYI(1, ("sfu compat create special file"));
|
| 373 |
|
|
|
| 374 |
|
|
buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
|
| 375 |
|
|
if (buf == NULL) {
|
| 376 |
|
|
kfree(full_path);
|
| 377 |
|
|
FreeXid(xid);
|
| 378 |
|
|
return -ENOMEM;
|
| 379 |
|
|
}
|
| 380 |
|
|
|
| 381 |
|
|
rc = CIFSSMBOpen(xid, pTcon, full_path,
|
| 382 |
|
|
FILE_CREATE, /* fail if exists */
|
| 383 |
|
|
GENERIC_WRITE /* BB would
|
| 384 |
|
|
WRITE_OWNER | WRITE_DAC be better? */,
|
| 385 |
|
|
/* Create a file and set the
|
| 386 |
|
|
file attribute to SYSTEM */
|
| 387 |
|
|
CREATE_NOT_DIR | CREATE_OPTION_SPECIAL,
|
| 388 |
|
|
&fileHandle, &oplock, buf,
|
| 389 |
|
|
cifs_sb->local_nls,
|
| 390 |
|
|
cifs_sb->mnt_cifs_flags &
|
| 391 |
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
| 392 |
|
|
|
| 393 |
|
|
/* BB FIXME - add handling for backlevel servers
|
| 394 |
|
|
which need legacy open and check for all
|
| 395 |
|
|
calls to SMBOpen for fallback to SMBLeagcyOpen */
|
| 396 |
|
|
if (!rc) {
|
| 397 |
|
|
/* BB Do not bother to decode buf since no
|
| 398 |
|
|
local inode yet to put timestamps in,
|
| 399 |
|
|
but we can reuse it safely */
|
| 400 |
|
|
unsigned int bytes_written;
|
| 401 |
|
|
struct win_dev *pdev;
|
| 402 |
|
|
pdev = (struct win_dev *)buf;
|
| 403 |
|
|
if (S_ISCHR(mode)) {
|
| 404 |
|
|
memcpy(pdev->type, "IntxCHR", 8);
|
| 405 |
|
|
pdev->major =
|
| 406 |
|
|
cpu_to_le64(MAJOR(device_number));
|
| 407 |
|
|
pdev->minor =
|
| 408 |
|
|
cpu_to_le64(MINOR(device_number));
|
| 409 |
|
|
rc = CIFSSMBWrite(xid, pTcon,
|
| 410 |
|
|
fileHandle,
|
| 411 |
|
|
sizeof(struct win_dev),
|
| 412 |
|
|
0, &bytes_written, (char *)pdev,
|
| 413 |
|
|
NULL, 0);
|
| 414 |
|
|
} else if (S_ISBLK(mode)) {
|
| 415 |
|
|
memcpy(pdev->type, "IntxBLK", 8);
|
| 416 |
|
|
pdev->major =
|
| 417 |
|
|
cpu_to_le64(MAJOR(device_number));
|
| 418 |
|
|
pdev->minor =
|
| 419 |
|
|
cpu_to_le64(MINOR(device_number));
|
| 420 |
|
|
rc = CIFSSMBWrite(xid, pTcon,
|
| 421 |
|
|
fileHandle,
|
| 422 |
|
|
sizeof(struct win_dev),
|
| 423 |
|
|
0, &bytes_written, (char *)pdev,
|
| 424 |
|
|
NULL, 0);
|
| 425 |
|
|
} /* else if(S_ISFIFO */
|
| 426 |
|
|
CIFSSMBClose(xid, pTcon, fileHandle);
|
| 427 |
|
|
d_drop(direntry);
|
| 428 |
|
|
}
|
| 429 |
|
|
kfree(buf);
|
| 430 |
|
|
/* add code here to set EAs */
|
| 431 |
|
|
}
|
| 432 |
|
|
}
|
| 433 |
|
|
|
| 434 |
|
|
kfree(full_path);
|
| 435 |
|
|
FreeXid(xid);
|
| 436 |
|
|
return rc;
|
| 437 |
|
|
}
|
| 438 |
|
|
|
| 439 |
|
|
|
| 440 |
|
|
struct dentry *
|
| 441 |
|
|
cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry,
|
| 442 |
|
|
struct nameidata *nd)
|
| 443 |
|
|
{
|
| 444 |
|
|
int xid;
|
| 445 |
|
|
int rc = 0; /* to get around spurious gcc warning, set to zero here */
|
| 446 |
|
|
struct cifs_sb_info *cifs_sb;
|
| 447 |
|
|
struct cifsTconInfo *pTcon;
|
| 448 |
|
|
struct inode *newInode = NULL;
|
| 449 |
|
|
char *full_path = NULL;
|
| 450 |
|
|
|
| 451 |
|
|
xid = GetXid();
|
| 452 |
|
|
|
| 453 |
|
|
cFYI(1, (" parent inode = 0x%p name is: %s and dentry = 0x%p",
|
| 454 |
|
|
parent_dir_inode, direntry->d_name.name, direntry));
|
| 455 |
|
|
|
| 456 |
|
|
/* check whether path exists */
|
| 457 |
|
|
|
| 458 |
|
|
cifs_sb = CIFS_SB(parent_dir_inode->i_sb);
|
| 459 |
|
|
pTcon = cifs_sb->tcon;
|
| 460 |
|
|
|
| 461 |
|
|
/*
|
| 462 |
|
|
* Don't allow the separator character in a path component.
|
| 463 |
|
|
* The VFS will not allow "/", but "\" is allowed by posix.
|
| 464 |
|
|
*/
|
| 465 |
|
|
if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)) {
|
| 466 |
|
|
int i;
|
| 467 |
|
|
for (i = 0; i < direntry->d_name.len; i++)
|
| 468 |
|
|
if (direntry->d_name.name[i] == '\\') {
|
| 469 |
|
|
cFYI(1, ("Invalid file name"));
|
| 470 |
|
|
FreeXid(xid);
|
| 471 |
|
|
return ERR_PTR(-EINVAL);
|
| 472 |
|
|
}
|
| 473 |
|
|
}
|
| 474 |
|
|
|
| 475 |
|
|
/* can not grab the rename sem here since it would
|
| 476 |
|
|
deadlock in the cases (beginning of sys_rename itself)
|
| 477 |
|
|
in which we already have the sb rename sem */
|
| 478 |
|
|
full_path = build_path_from_dentry(direntry);
|
| 479 |
|
|
if (full_path == NULL) {
|
| 480 |
|
|
FreeXid(xid);
|
| 481 |
|
|
return ERR_PTR(-ENOMEM);
|
| 482 |
|
|
}
|
| 483 |
|
|
|
| 484 |
|
|
if (direntry->d_inode != NULL) {
|
| 485 |
|
|
cFYI(1, (" non-NULL inode in lookup"));
|
| 486 |
|
|
} else {
|
| 487 |
|
|
cFYI(1, (" NULL inode in lookup"));
|
| 488 |
|
|
}
|
| 489 |
|
|
cFYI(1,
|
| 490 |
|
|
(" Full path: %s inode = 0x%p", full_path, direntry->d_inode));
|
| 491 |
|
|
|
| 492 |
|
|
if (pTcon->unix_ext)
|
| 493 |
|
|
rc = cifs_get_inode_info_unix(&newInode, full_path,
|
| 494 |
|
|
parent_dir_inode->i_sb, xid);
|
| 495 |
|
|
else
|
| 496 |
|
|
rc = cifs_get_inode_info(&newInode, full_path, NULL,
|
| 497 |
|
|
parent_dir_inode->i_sb, xid);
|
| 498 |
|
|
|
| 499 |
|
|
if ((rc == 0) && (newInode != NULL)) {
|
| 500 |
|
|
if (pTcon->nocase)
|
| 501 |
|
|
direntry->d_op = &cifs_ci_dentry_ops;
|
| 502 |
|
|
else
|
| 503 |
|
|
direntry->d_op = &cifs_dentry_ops;
|
| 504 |
|
|
d_add(direntry, newInode);
|
| 505 |
|
|
|
| 506 |
|
|
/* since paths are not looked up by component - the parent
|
| 507 |
|
|
directories are presumed to be good here */
|
| 508 |
|
|
renew_parental_timestamps(direntry);
|
| 509 |
|
|
|
| 510 |
|
|
} else if (rc == -ENOENT) {
|
| 511 |
|
|
rc = 0;
|
| 512 |
|
|
direntry->d_time = jiffies;
|
| 513 |
|
|
if (pTcon->nocase)
|
| 514 |
|
|
direntry->d_op = &cifs_ci_dentry_ops;
|
| 515 |
|
|
else
|
| 516 |
|
|
direntry->d_op = &cifs_dentry_ops;
|
| 517 |
|
|
d_add(direntry, NULL);
|
| 518 |
|
|
/* if it was once a directory (but how can we tell?) we could do
|
| 519 |
|
|
shrink_dcache_parent(direntry); */
|
| 520 |
|
|
} else {
|
| 521 |
|
|
cERROR(1, ("Error 0x%x on cifs_get_inode_info in lookup of %s",
|
| 522 |
|
|
rc, full_path));
|
| 523 |
|
|
/* BB special case check for Access Denied - watch security
|
| 524 |
|
|
exposure of returning dir info implicitly via different rc
|
| 525 |
|
|
if file exists or not but no access BB */
|
| 526 |
|
|
}
|
| 527 |
|
|
|
| 528 |
|
|
kfree(full_path);
|
| 529 |
|
|
FreeXid(xid);
|
| 530 |
|
|
return ERR_PTR(rc);
|
| 531 |
|
|
}
|
| 532 |
|
|
|
| 533 |
|
|
static int
|
| 534 |
|
|
cifs_d_revalidate(struct dentry *direntry, struct nameidata *nd)
|
| 535 |
|
|
{
|
| 536 |
|
|
int isValid = 1;
|
| 537 |
|
|
|
| 538 |
|
|
if (direntry->d_inode) {
|
| 539 |
|
|
if (cifs_revalidate(direntry)) {
|
| 540 |
|
|
return 0;
|
| 541 |
|
|
}
|
| 542 |
|
|
} else {
|
| 543 |
|
|
cFYI(1, ("neg dentry 0x%p name = %s",
|
| 544 |
|
|
direntry, direntry->d_name.name));
|
| 545 |
|
|
if (time_after(jiffies, direntry->d_time + HZ) ||
|
| 546 |
|
|
!lookupCacheEnabled) {
|
| 547 |
|
|
d_drop(direntry);
|
| 548 |
|
|
isValid = 0;
|
| 549 |
|
|
}
|
| 550 |
|
|
}
|
| 551 |
|
|
|
| 552 |
|
|
return isValid;
|
| 553 |
|
|
}
|
| 554 |
|
|
|
| 555 |
|
|
/* static int cifs_d_delete(struct dentry *direntry)
|
| 556 |
|
|
{
|
| 557 |
|
|
int rc = 0;
|
| 558 |
|
|
|
| 559 |
|
|
cFYI(1, ("In cifs d_delete, name = %s", direntry->d_name.name));
|
| 560 |
|
|
|
| 561 |
|
|
return rc;
|
| 562 |
|
|
} */
|
| 563 |
|
|
|
| 564 |
|
|
struct dentry_operations cifs_dentry_ops = {
|
| 565 |
|
|
.d_revalidate = cifs_d_revalidate,
|
| 566 |
|
|
/* d_delete: cifs_d_delete, */ /* not needed except for debugging */
|
| 567 |
|
|
};
|
| 568 |
|
|
|
| 569 |
|
|
static int cifs_ci_hash(struct dentry *dentry, struct qstr *q)
|
| 570 |
|
|
{
|
| 571 |
|
|
struct nls_table *codepage = CIFS_SB(dentry->d_inode->i_sb)->local_nls;
|
| 572 |
|
|
unsigned long hash;
|
| 573 |
|
|
int i;
|
| 574 |
|
|
|
| 575 |
|
|
hash = init_name_hash();
|
| 576 |
|
|
for (i = 0; i < q->len; i++)
|
| 577 |
|
|
hash = partial_name_hash(nls_tolower(codepage, q->name[i]),
|
| 578 |
|
|
hash);
|
| 579 |
|
|
q->hash = end_name_hash(hash);
|
| 580 |
|
|
|
| 581 |
|
|
return 0;
|
| 582 |
|
|
}
|
| 583 |
|
|
|
| 584 |
|
|
static int cifs_ci_compare(struct dentry *dentry, struct qstr *a,
|
| 585 |
|
|
struct qstr *b)
|
| 586 |
|
|
{
|
| 587 |
|
|
struct nls_table *codepage = CIFS_SB(dentry->d_inode->i_sb)->local_nls;
|
| 588 |
|
|
|
| 589 |
|
|
if ((a->len == b->len) &&
|
| 590 |
|
|
(nls_strnicmp(codepage, a->name, b->name, a->len) == 0)) {
|
| 591 |
|
|
/*
|
| 592 |
|
|
* To preserve case, don't let an existing negative dentry's
|
| 593 |
|
|
* case take precedence. If a is not a negative dentry, this
|
| 594 |
|
|
* should have no side effects
|
| 595 |
|
|
*/
|
| 596 |
|
|
memcpy(a->name, b->name, a->len);
|
| 597 |
|
|
return 0;
|
| 598 |
|
|
}
|
| 599 |
|
|
return 1;
|
| 600 |
|
|
}
|
| 601 |
|
|
|
| 602 |
|
|
struct dentry_operations cifs_ci_dentry_ops = {
|
| 603 |
|
|
.d_revalidate = cifs_d_revalidate,
|
| 604 |
|
|
.d_hash = cifs_ci_hash,
|
| 605 |
|
|
.d_compare = cifs_ci_compare,
|
| 606 |
|
|
};
|
