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076d8423a9
When a share was in DFS and the server was Unix/Linux, we were sending paths of the form
\\server\share/dir/file
rather than
//server/share/dir/file
There was some discussion between me and jra over whether we should use
/server/share/dir/file
as MS sometimes says - but the documentation for this claims it should be
doubleslash for this type of UNC-like path format and that works, so leaving
it as doubleslash but converting the \ to / in the the //server/share portion.
This gets Samba to now correctly return STATUS_PATH_NOT_COVERED when it is
supposed to (Windows already did since the direction of the slash was not an issue
for them). Still need another minor change to fully enable DFS (need to finish
some chages to SMBGetDFSRefer
Signed-off-by: Steve French <sfrench@us.ibm.com>
1687 lines
49 KiB
C
1687 lines
49 KiB
C
/*
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* fs/cifs/inode.c
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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/pagemap.h>
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#include <asm/div64.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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static void cifs_set_ops(struct inode *inode, const bool is_dfs_referral)
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{
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struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
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switch (inode->i_mode & S_IFMT) {
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case S_IFREG:
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inode->i_op = &cifs_file_inode_ops;
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if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
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if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
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inode->i_fop = &cifs_file_direct_nobrl_ops;
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else
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inode->i_fop = &cifs_file_direct_ops;
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} else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
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inode->i_fop = &cifs_file_nobrl_ops;
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else { /* not direct, send byte range locks */
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inode->i_fop = &cifs_file_ops;
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}
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/* check if server can support readpages */
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if (cifs_sb->tcon->ses->server->maxBuf <
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PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)
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inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
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else
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inode->i_data.a_ops = &cifs_addr_ops;
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break;
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case S_IFDIR:
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#ifdef CONFIG_CIFS_DFS_UPCALL
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if (is_dfs_referral) {
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inode->i_op = &cifs_dfs_referral_inode_operations;
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} else {
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#else /* NO DFS support, treat as a directory */
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{
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#endif
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inode->i_op = &cifs_dir_inode_ops;
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inode->i_fop = &cifs_dir_ops;
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}
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break;
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case S_IFLNK:
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inode->i_op = &cifs_symlink_inode_ops;
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break;
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default:
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init_special_inode(inode, inode->i_mode, inode->i_rdev);
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break;
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}
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}
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static void cifs_unix_info_to_inode(struct inode *inode,
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FILE_UNIX_BASIC_INFO *info, int force_uid_gid)
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{
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struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
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struct cifsInodeInfo *cifsInfo = CIFS_I(inode);
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__u64 num_of_bytes = le64_to_cpu(info->NumOfBytes);
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__u64 end_of_file = le64_to_cpu(info->EndOfFile);
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inode->i_atime = cifs_NTtimeToUnix(le64_to_cpu(info->LastAccessTime));
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inode->i_mtime =
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cifs_NTtimeToUnix(le64_to_cpu(info->LastModificationTime));
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inode->i_ctime = cifs_NTtimeToUnix(le64_to_cpu(info->LastStatusChange));
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inode->i_mode = le64_to_cpu(info->Permissions);
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/*
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* Since we set the inode type below we need to mask off
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* to avoid strange results if bits set above.
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*/
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inode->i_mode &= ~S_IFMT;
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switch (le32_to_cpu(info->Type)) {
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case UNIX_FILE:
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inode->i_mode |= S_IFREG;
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break;
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case UNIX_SYMLINK:
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inode->i_mode |= S_IFLNK;
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break;
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case UNIX_DIR:
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inode->i_mode |= S_IFDIR;
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break;
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case UNIX_CHARDEV:
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inode->i_mode |= S_IFCHR;
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inode->i_rdev = MKDEV(le64_to_cpu(info->DevMajor),
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le64_to_cpu(info->DevMinor) & MINORMASK);
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break;
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case UNIX_BLOCKDEV:
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inode->i_mode |= S_IFBLK;
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inode->i_rdev = MKDEV(le64_to_cpu(info->DevMajor),
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le64_to_cpu(info->DevMinor) & MINORMASK);
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break;
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case UNIX_FIFO:
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inode->i_mode |= S_IFIFO;
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break;
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case UNIX_SOCKET:
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inode->i_mode |= S_IFSOCK;
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break;
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default:
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/* safest to call it a file if we do not know */
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inode->i_mode |= S_IFREG;
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cFYI(1, ("unknown type %d", le32_to_cpu(info->Type)));
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break;
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}
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if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) &&
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!force_uid_gid)
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inode->i_uid = cifs_sb->mnt_uid;
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else
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inode->i_uid = le64_to_cpu(info->Uid);
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if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) &&
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!force_uid_gid)
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inode->i_gid = cifs_sb->mnt_gid;
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else
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inode->i_gid = le64_to_cpu(info->Gid);
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inode->i_nlink = le64_to_cpu(info->Nlinks);
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spin_lock(&inode->i_lock);
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if (is_size_safe_to_change(cifsInfo, end_of_file)) {
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/*
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* We can not safely change the file size here if the client
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* is writing to it due to potential races.
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*/
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i_size_write(inode, end_of_file);
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/*
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* i_blocks is not related to (i_size / i_blksize),
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* but instead 512 byte (2**9) size is required for
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* calculating num blocks.
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*/
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inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
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}
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spin_unlock(&inode->i_lock);
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}
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static const unsigned char *cifs_get_search_path(struct cifs_sb_info *cifs_sb,
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const char *search_path)
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{
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int tree_len;
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int path_len;
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int i;
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char *tmp_path;
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struct cifsTconInfo *pTcon = cifs_sb->tcon;
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if (!(pTcon->Flags & SMB_SHARE_IS_IN_DFS))
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return search_path;
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/* use full path name for working with DFS */
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tree_len = strnlen(pTcon->treeName, MAX_TREE_SIZE + 1);
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path_len = strnlen(search_path, MAX_PATHCONF);
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tmp_path = kmalloc(tree_len+path_len+1, GFP_KERNEL);
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if (tmp_path == NULL)
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return search_path;
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strncpy(tmp_path, pTcon->treeName, tree_len);
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if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
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for (i = 0; i < tree_len; i++) {
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if (tmp_path[i] == '\\')
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tmp_path[i] = '/';
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}
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strncpy(tmp_path+tree_len, search_path, path_len);
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tmp_path[tree_len+path_len] = 0;
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return tmp_path;
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}
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int cifs_get_inode_info_unix(struct inode **pinode,
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const unsigned char *search_path, struct super_block *sb, int xid)
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{
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int rc = 0;
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FILE_UNIX_BASIC_INFO findData;
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struct cifsTconInfo *pTcon;
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struct inode *inode;
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struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
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const unsigned char *full_path;
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bool is_dfs_referral = false;
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pTcon = cifs_sb->tcon;
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cFYI(1, ("Getting info on %s", search_path));
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full_path = cifs_get_search_path(cifs_sb, search_path);
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try_again_CIFSSMBUnixQPathInfo:
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/* could have done a find first instead but this returns more info */
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rc = CIFSSMBUnixQPathInfo(xid, pTcon, full_path, &findData,
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cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
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CIFS_MOUNT_MAP_SPECIAL_CHR);
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/* dump_mem("\nUnixQPathInfo return data", &findData,
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sizeof(findData)); */
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if (rc) {
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if (rc == -EREMOTE && !is_dfs_referral) {
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is_dfs_referral = true;
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if (full_path != search_path) {
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kfree(full_path);
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full_path = search_path;
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}
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goto try_again_CIFSSMBUnixQPathInfo;
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}
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goto cgiiu_exit;
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} else {
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struct cifsInodeInfo *cifsInfo;
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__u64 num_of_bytes = le64_to_cpu(findData.NumOfBytes);
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__u64 end_of_file = le64_to_cpu(findData.EndOfFile);
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/* get new inode */
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if (*pinode == NULL) {
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*pinode = new_inode(sb);
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if (*pinode == NULL) {
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rc = -ENOMEM;
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goto cgiiu_exit;
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}
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/* Is an i_ino of zero legal? */
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/* Are there sanity checks we can use to ensure that
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the server is really filling in that field? */
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if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
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(*pinode)->i_ino =
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(unsigned long)findData.UniqueId;
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} /* note ino incremented to unique num in new_inode */
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if (sb->s_flags & MS_NOATIME)
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(*pinode)->i_flags |= S_NOATIME | S_NOCMTIME;
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insert_inode_hash(*pinode);
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}
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inode = *pinode;
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cifsInfo = CIFS_I(inode);
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cFYI(1, ("Old time %ld", cifsInfo->time));
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cifsInfo->time = jiffies;
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cFYI(1, ("New time %ld", cifsInfo->time));
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/* this is ok to set on every inode revalidate */
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atomic_set(&cifsInfo->inUse, 1);
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cifs_unix_info_to_inode(inode, &findData, 0);
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if (num_of_bytes < end_of_file)
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cFYI(1, ("allocation size less than end of file"));
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cFYI(1, ("Size %ld and blocks %llu",
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(unsigned long) inode->i_size,
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(unsigned long long)inode->i_blocks));
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cifs_set_ops(inode, is_dfs_referral);
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}
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cgiiu_exit:
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if (full_path != search_path)
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kfree(full_path);
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return rc;
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}
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static int decode_sfu_inode(struct inode *inode, __u64 size,
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const unsigned char *path,
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struct cifs_sb_info *cifs_sb, int xid)
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{
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int rc;
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int oplock = FALSE;
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__u16 netfid;
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struct cifsTconInfo *pTcon = cifs_sb->tcon;
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char buf[24];
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unsigned int bytes_read;
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char *pbuf;
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pbuf = buf;
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if (size == 0) {
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inode->i_mode |= S_IFIFO;
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return 0;
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} else if (size < 8) {
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return -EINVAL; /* EOPNOTSUPP? */
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}
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rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ,
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CREATE_NOT_DIR, &netfid, &oplock, NULL,
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cifs_sb->local_nls,
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cifs_sb->mnt_cifs_flags &
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CIFS_MOUNT_MAP_SPECIAL_CHR);
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if (rc == 0) {
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int buf_type = CIFS_NO_BUFFER;
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/* Read header */
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rc = CIFSSMBRead(xid, pTcon,
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netfid,
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24 /* length */, 0 /* offset */,
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&bytes_read, &pbuf, &buf_type);
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if ((rc == 0) && (bytes_read >= 8)) {
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if (memcmp("IntxBLK", pbuf, 8) == 0) {
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cFYI(1, ("Block device"));
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inode->i_mode |= S_IFBLK;
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if (bytes_read == 24) {
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/* we have enough to decode dev num */
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__u64 mjr; /* major */
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__u64 mnr; /* minor */
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mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
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mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
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inode->i_rdev = MKDEV(mjr, mnr);
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}
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} else if (memcmp("IntxCHR", pbuf, 8) == 0) {
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cFYI(1, ("Char device"));
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inode->i_mode |= S_IFCHR;
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if (bytes_read == 24) {
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/* we have enough to decode dev num */
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__u64 mjr; /* major */
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__u64 mnr; /* minor */
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mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
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mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
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inode->i_rdev = MKDEV(mjr, mnr);
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}
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} else if (memcmp("IntxLNK", pbuf, 7) == 0) {
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cFYI(1, ("Symlink"));
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inode->i_mode |= S_IFLNK;
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} else {
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inode->i_mode |= S_IFREG; /* file? */
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rc = -EOPNOTSUPP;
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}
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} else {
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inode->i_mode |= S_IFREG; /* then it is a file */
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rc = -EOPNOTSUPP; /* or some unknown SFU type */
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}
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CIFSSMBClose(xid, pTcon, netfid);
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}
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return rc;
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}
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|
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#define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */
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static int get_sfu_mode(struct inode *inode,
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const unsigned char *path,
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struct cifs_sb_info *cifs_sb, int xid)
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{
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#ifdef CONFIG_CIFS_XATTR
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ssize_t rc;
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char ea_value[4];
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__u32 mode;
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rc = CIFSSMBQueryEA(xid, cifs_sb->tcon, path, "SETFILEBITS",
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ea_value, 4 /* size of buf */, cifs_sb->local_nls,
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cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
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if (rc < 0)
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return (int)rc;
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else if (rc > 3) {
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mode = le32_to_cpu(*((__le32 *)ea_value));
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inode->i_mode &= ~SFBITS_MASK;
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cFYI(1, ("special bits 0%o org mode 0%o", mode, inode->i_mode));
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inode->i_mode = (mode & SFBITS_MASK) | inode->i_mode;
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cFYI(1, ("special mode bits 0%o", mode));
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return 0;
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} else {
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return 0;
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}
|
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#else
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return -EOPNOTSUPP;
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#endif
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}
|
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|
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int cifs_get_inode_info(struct inode **pinode,
|
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const unsigned char *search_path, FILE_ALL_INFO *pfindData,
|
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struct super_block *sb, int xid, const __u16 *pfid)
|
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{
|
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int rc = 0;
|
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struct cifsTconInfo *pTcon;
|
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struct inode *inode;
|
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struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
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const unsigned char *full_path = NULL;
|
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char *buf = NULL;
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int adjustTZ = FALSE;
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bool is_dfs_referral = false;
|
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|
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pTcon = cifs_sb->tcon;
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cFYI(1, ("Getting info on %s", search_path));
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|
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if ((pfindData == NULL) && (*pinode != NULL)) {
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if (CIFS_I(*pinode)->clientCanCacheRead) {
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cFYI(1, ("No need to revalidate cached inode sizes"));
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return rc;
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}
|
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}
|
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|
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/* if file info not passed in then get it from server */
|
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if (pfindData == NULL) {
|
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buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
|
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if (buf == NULL)
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return -ENOMEM;
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pfindData = (FILE_ALL_INFO *)buf;
|
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|
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full_path = cifs_get_search_path(cifs_sb, search_path);
|
|
|
|
try_again_CIFSSMBQPathInfo:
|
|
/* could do find first instead but this returns more info */
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rc = CIFSSMBQPathInfo(xid, pTcon, full_path, pfindData,
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0 /* not legacy */,
|
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cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
/* BB optimize code so we do not make the above call
|
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when server claims no NT SMB support and the above call
|
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failed at least once - set flag in tcon or mount */
|
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if ((rc == -EOPNOTSUPP) || (rc == -EINVAL)) {
|
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rc = SMBQueryInformation(xid, pTcon, full_path,
|
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pfindData, cifs_sb->local_nls,
|
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cifs_sb->mnt_cifs_flags &
|
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CIFS_MOUNT_MAP_SPECIAL_CHR);
|
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adjustTZ = TRUE;
|
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}
|
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}
|
|
/* dump_mem("\nQPathInfo return data",&findData, sizeof(findData)); */
|
|
if (rc) {
|
|
if (rc == -EREMOTE && !is_dfs_referral) {
|
|
is_dfs_referral = true;
|
|
if (full_path != search_path) {
|
|
kfree(full_path);
|
|
full_path = search_path;
|
|
}
|
|
goto try_again_CIFSSMBQPathInfo;
|
|
}
|
|
goto cgii_exit;
|
|
} else {
|
|
struct cifsInodeInfo *cifsInfo;
|
|
__u32 attr = le32_to_cpu(pfindData->Attributes);
|
|
|
|
/* get new inode */
|
|
if (*pinode == NULL) {
|
|
*pinode = new_inode(sb);
|
|
if (*pinode == NULL) {
|
|
rc = -ENOMEM;
|
|
goto cgii_exit;
|
|
}
|
|
/* Is an i_ino of zero legal? Can we use that to check
|
|
if the server supports returning inode numbers? Are
|
|
there other sanity checks we can use to ensure that
|
|
the server is really filling in that field? */
|
|
|
|
/* We can not use the IndexNumber field by default from
|
|
Windows or Samba (in ALL_INFO buf) but we can request
|
|
it explicitly. It may not be unique presumably if
|
|
the server has multiple devices mounted under one
|
|
share */
|
|
|
|
/* There may be higher info levels that work but are
|
|
there Windows server or network appliances for which
|
|
IndexNumber field is not guaranteed unique? */
|
|
|
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
|
|
int rc1 = 0;
|
|
__u64 inode_num;
|
|
|
|
rc1 = CIFSGetSrvInodeNumber(xid, pTcon,
|
|
search_path, &inode_num,
|
|
cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
if (rc1) {
|
|
cFYI(1, ("GetSrvInodeNum rc %d", rc1));
|
|
/* BB EOPNOSUPP disable SERVER_INUM? */
|
|
} else /* do we need cast or hash to ino? */
|
|
(*pinode)->i_ino = inode_num;
|
|
} /* else ino incremented to unique num in new_inode*/
|
|
if (sb->s_flags & MS_NOATIME)
|
|
(*pinode)->i_flags |= S_NOATIME | S_NOCMTIME;
|
|
insert_inode_hash(*pinode);
|
|
}
|
|
inode = *pinode;
|
|
cifsInfo = CIFS_I(inode);
|
|
cifsInfo->cifsAttrs = attr;
|
|
cFYI(1, ("Old time %ld", cifsInfo->time));
|
|
cifsInfo->time = jiffies;
|
|
cFYI(1, ("New time %ld", cifsInfo->time));
|
|
|
|
/* blksize needs to be multiple of two. So safer to default to
|
|
blksize and blkbits set in superblock so 2**blkbits and blksize
|
|
will match rather than setting to:
|
|
(pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
|
|
|
|
/* Linux can not store file creation time so ignore it */
|
|
if (pfindData->LastAccessTime)
|
|
inode->i_atime = cifs_NTtimeToUnix
|
|
(le64_to_cpu(pfindData->LastAccessTime));
|
|
else /* do not need to use current_fs_time - time not stored */
|
|
inode->i_atime = CURRENT_TIME;
|
|
inode->i_mtime =
|
|
cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
|
|
inode->i_ctime =
|
|
cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
|
|
cFYI(0, ("Attributes came in as 0x%x", attr));
|
|
if (adjustTZ && (pTcon->ses) && (pTcon->ses->server)) {
|
|
inode->i_ctime.tv_sec += pTcon->ses->server->timeAdj;
|
|
inode->i_mtime.tv_sec += pTcon->ses->server->timeAdj;
|
|
}
|
|
|
|
/* set default mode. will override for dirs below */
|
|
if (atomic_read(&cifsInfo->inUse) == 0)
|
|
/* new inode, can safely set these fields */
|
|
inode->i_mode = cifs_sb->mnt_file_mode;
|
|
else /* since we set the inode type below we need to mask off
|
|
to avoid strange results if type changes and both
|
|
get orred in */
|
|
inode->i_mode &= ~S_IFMT;
|
|
/* if (attr & ATTR_REPARSE) */
|
|
/* We no longer handle these as symlinks because we could not
|
|
follow them due to the absolute path with drive letter */
|
|
if (attr & ATTR_DIRECTORY) {
|
|
/* override default perms since we do not do byte range locking
|
|
on dirs */
|
|
inode->i_mode = cifs_sb->mnt_dir_mode;
|
|
inode->i_mode |= S_IFDIR;
|
|
} else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
|
|
(cifsInfo->cifsAttrs & ATTR_SYSTEM) &&
|
|
/* No need to le64 convert size of zero */
|
|
(pfindData->EndOfFile == 0)) {
|
|
inode->i_mode = cifs_sb->mnt_file_mode;
|
|
inode->i_mode |= S_IFIFO;
|
|
/* BB Finish for SFU style symlinks and devices */
|
|
} else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
|
|
(cifsInfo->cifsAttrs & ATTR_SYSTEM)) {
|
|
if (decode_sfu_inode(inode,
|
|
le64_to_cpu(pfindData->EndOfFile),
|
|
search_path,
|
|
cifs_sb, xid))
|
|
cFYI(1, ("Unrecognized sfu inode type"));
|
|
|
|
cFYI(1, ("sfu mode 0%o", inode->i_mode));
|
|
} else {
|
|
inode->i_mode |= S_IFREG;
|
|
/* treat the dos attribute of read-only as read-only
|
|
mode e.g. 555 */
|
|
if (cifsInfo->cifsAttrs & ATTR_READONLY)
|
|
inode->i_mode &= ~(S_IWUGO);
|
|
else if ((inode->i_mode & S_IWUGO) == 0)
|
|
/* the ATTR_READONLY flag may have been */
|
|
/* changed on server -- set any w bits */
|
|
/* allowed by mnt_file_mode */
|
|
inode->i_mode |= (S_IWUGO &
|
|
cifs_sb->mnt_file_mode);
|
|
/* BB add code here -
|
|
validate if device or weird share or device type? */
|
|
}
|
|
|
|
spin_lock(&inode->i_lock);
|
|
if (is_size_safe_to_change(cifsInfo,
|
|
le64_to_cpu(pfindData->EndOfFile))) {
|
|
/* can not safely shrink the file size here if the
|
|
client is writing to it due to potential races */
|
|
i_size_write(inode, le64_to_cpu(pfindData->EndOfFile));
|
|
|
|
/* 512 bytes (2**9) is the fake blocksize that must be
|
|
used for this calculation */
|
|
inode->i_blocks = (512 - 1 + le64_to_cpu(
|
|
pfindData->AllocationSize)) >> 9;
|
|
}
|
|
spin_unlock(&inode->i_lock);
|
|
|
|
inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks);
|
|
|
|
/* BB fill in uid and gid here? with help from winbind?
|
|
or retrieve from NTFS stream extended attribute */
|
|
#ifdef CONFIG_CIFS_EXPERIMENTAL
|
|
/* fill in 0777 bits from ACL */
|
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
|
|
cFYI(1, ("Getting mode bits from ACL"));
|
|
acl_to_uid_mode(inode, search_path, pfid);
|
|
}
|
|
#endif
|
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
|
|
/* fill in remaining high mode bits e.g. SUID, VTX */
|
|
get_sfu_mode(inode, search_path, cifs_sb, xid);
|
|
} else if (atomic_read(&cifsInfo->inUse) == 0) {
|
|
inode->i_uid = cifs_sb->mnt_uid;
|
|
inode->i_gid = cifs_sb->mnt_gid;
|
|
/* set so we do not keep refreshing these fields with
|
|
bad data after user has changed them in memory */
|
|
atomic_set(&cifsInfo->inUse, 1);
|
|
}
|
|
|
|
cifs_set_ops(inode, is_dfs_referral);
|
|
}
|
|
cgii_exit:
|
|
if (full_path != search_path)
|
|
kfree(full_path);
|
|
kfree(buf);
|
|
return rc;
|
|
}
|
|
|
|
static const struct inode_operations cifs_ipc_inode_ops = {
|
|
.lookup = cifs_lookup,
|
|
};
|
|
|
|
/* gets root inode */
|
|
struct inode *cifs_iget(struct super_block *sb, unsigned long ino)
|
|
{
|
|
int xid;
|
|
struct cifs_sb_info *cifs_sb;
|
|
struct inode *inode;
|
|
long rc;
|
|
|
|
inode = iget_locked(sb, ino);
|
|
if (!inode)
|
|
return ERR_PTR(-ENOMEM);
|
|
if (!(inode->i_state & I_NEW))
|
|
return inode;
|
|
|
|
cifs_sb = CIFS_SB(inode->i_sb);
|
|
xid = GetXid();
|
|
|
|
if (cifs_sb->tcon->unix_ext)
|
|
rc = cifs_get_inode_info_unix(&inode, "", inode->i_sb, xid);
|
|
else
|
|
rc = cifs_get_inode_info(&inode, "", NULL, inode->i_sb, xid,
|
|
NULL);
|
|
if (rc && cifs_sb->tcon->ipc) {
|
|
cFYI(1, ("ipc connection - fake read inode"));
|
|
inode->i_mode |= S_IFDIR;
|
|
inode->i_nlink = 2;
|
|
inode->i_op = &cifs_ipc_inode_ops;
|
|
inode->i_fop = &simple_dir_operations;
|
|
inode->i_uid = cifs_sb->mnt_uid;
|
|
inode->i_gid = cifs_sb->mnt_gid;
|
|
_FreeXid(xid);
|
|
iget_failed(inode);
|
|
return ERR_PTR(rc);
|
|
}
|
|
|
|
unlock_new_inode(inode);
|
|
|
|
/* can not call macro FreeXid here since in a void func
|
|
* TODO: This is no longer true
|
|
*/
|
|
_FreeXid(xid);
|
|
return inode;
|
|
}
|
|
|
|
int cifs_unlink(struct inode *inode, struct dentry *direntry)
|
|
{
|
|
int rc = 0;
|
|
int xid;
|
|
struct cifs_sb_info *cifs_sb;
|
|
struct cifsTconInfo *pTcon;
|
|
char *full_path = NULL;
|
|
struct cifsInodeInfo *cifsInode;
|
|
FILE_BASIC_INFO *pinfo_buf;
|
|
|
|
cFYI(1, ("cifs_unlink, inode = 0x%p", inode));
|
|
|
|
xid = GetXid();
|
|
|
|
if (inode)
|
|
cifs_sb = CIFS_SB(inode->i_sb);
|
|
else
|
|
cifs_sb = CIFS_SB(direntry->d_sb);
|
|
pTcon = cifs_sb->tcon;
|
|
|
|
/* Unlink can be called from rename so we can not grab the sem here
|
|
since we deadlock otherwise */
|
|
/* mutex_lock(&direntry->d_sb->s_vfs_rename_mutex);*/
|
|
full_path = build_path_from_dentry(direntry);
|
|
/* mutex_unlock(&direntry->d_sb->s_vfs_rename_mutex);*/
|
|
if (full_path == NULL) {
|
|
FreeXid(xid);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
if ((pTcon->ses->capabilities & CAP_UNIX) &&
|
|
(CIFS_UNIX_POSIX_PATH_OPS_CAP &
|
|
le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
|
|
rc = CIFSPOSIXDelFile(xid, pTcon, full_path,
|
|
SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
cFYI(1, ("posix del rc %d", rc));
|
|
if ((rc == 0) || (rc == -ENOENT))
|
|
goto psx_del_no_retry;
|
|
}
|
|
|
|
rc = CIFSSMBDelFile(xid, pTcon, full_path, cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
psx_del_no_retry:
|
|
if (!rc) {
|
|
if (direntry->d_inode)
|
|
drop_nlink(direntry->d_inode);
|
|
} else if (rc == -ENOENT) {
|
|
d_drop(direntry);
|
|
} else if (rc == -ETXTBSY) {
|
|
int oplock = FALSE;
|
|
__u16 netfid;
|
|
|
|
rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, DELETE,
|
|
CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE,
|
|
&netfid, &oplock, NULL, cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
if (rc == 0) {
|
|
CIFSSMBRenameOpenFile(xid, pTcon, netfid, NULL,
|
|
cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
CIFSSMBClose(xid, pTcon, netfid);
|
|
if (direntry->d_inode)
|
|
drop_nlink(direntry->d_inode);
|
|
}
|
|
} else if (rc == -EACCES) {
|
|
/* try only if r/o attribute set in local lookup data? */
|
|
pinfo_buf = kzalloc(sizeof(FILE_BASIC_INFO), GFP_KERNEL);
|
|
if (pinfo_buf) {
|
|
/* ATTRS set to normal clears r/o bit */
|
|
pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL);
|
|
if (!(pTcon->ses->flags & CIFS_SES_NT4))
|
|
rc = CIFSSMBSetTimes(xid, pTcon, full_path,
|
|
pinfo_buf,
|
|
cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
else
|
|
rc = -EOPNOTSUPP;
|
|
|
|
if (rc == -EOPNOTSUPP) {
|
|
int oplock = FALSE;
|
|
__u16 netfid;
|
|
/* rc = CIFSSMBSetAttrLegacy(xid, pTcon,
|
|
full_path,
|
|
(__u16)ATTR_NORMAL,
|
|
cifs_sb->local_nls);
|
|
For some strange reason it seems that NT4 eats the
|
|
old setattr call without actually setting the
|
|
attributes so on to the third attempted workaround
|
|
*/
|
|
|
|
/* BB could scan to see if we already have it open
|
|
and pass in pid of opener to function */
|
|
rc = CIFSSMBOpen(xid, pTcon, full_path,
|
|
FILE_OPEN, SYNCHRONIZE |
|
|
FILE_WRITE_ATTRIBUTES, 0,
|
|
&netfid, &oplock, NULL,
|
|
cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
if (rc == 0) {
|
|
rc = CIFSSMBSetFileTimes(xid, pTcon,
|
|
pinfo_buf,
|
|
netfid);
|
|
CIFSSMBClose(xid, pTcon, netfid);
|
|
}
|
|
}
|
|
kfree(pinfo_buf);
|
|
}
|
|
if (rc == 0) {
|
|
rc = CIFSSMBDelFile(xid, pTcon, full_path,
|
|
cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
if (!rc) {
|
|
if (direntry->d_inode)
|
|
drop_nlink(direntry->d_inode);
|
|
} else if (rc == -ETXTBSY) {
|
|
int oplock = FALSE;
|
|
__u16 netfid;
|
|
|
|
rc = CIFSSMBOpen(xid, pTcon, full_path,
|
|
FILE_OPEN, DELETE,
|
|
CREATE_NOT_DIR |
|
|
CREATE_DELETE_ON_CLOSE,
|
|
&netfid, &oplock, NULL,
|
|
cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
if (rc == 0) {
|
|
CIFSSMBRenameOpenFile(xid, pTcon,
|
|
netfid, NULL,
|
|
cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
CIFSSMBClose(xid, pTcon, netfid);
|
|
if (direntry->d_inode)
|
|
drop_nlink(direntry->d_inode);
|
|
}
|
|
/* BB if rc = -ETXTBUSY goto the rename logic BB */
|
|
}
|
|
}
|
|
}
|
|
if (direntry->d_inode) {
|
|
cifsInode = CIFS_I(direntry->d_inode);
|
|
cifsInode->time = 0; /* will force revalidate to get info
|
|
when needed */
|
|
direntry->d_inode->i_ctime = current_fs_time(inode->i_sb);
|
|
}
|
|
if (inode) {
|
|
inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb);
|
|
cifsInode = CIFS_I(inode);
|
|
cifsInode->time = 0; /* force revalidate of dir as well */
|
|
}
|
|
|
|
kfree(full_path);
|
|
FreeXid(xid);
|
|
return rc;
|
|
}
|
|
|
|
static void posix_fill_in_inode(struct inode *tmp_inode,
|
|
FILE_UNIX_BASIC_INFO *pData, int isNewInode)
|
|
{
|
|
struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
|
|
loff_t local_size;
|
|
struct timespec local_mtime;
|
|
|
|
cifsInfo->time = jiffies;
|
|
atomic_inc(&cifsInfo->inUse);
|
|
|
|
/* save mtime and size */
|
|
local_mtime = tmp_inode->i_mtime;
|
|
local_size = tmp_inode->i_size;
|
|
|
|
cifs_unix_info_to_inode(tmp_inode, pData, 1);
|
|
cifs_set_ops(tmp_inode, false);
|
|
|
|
if (!S_ISREG(tmp_inode->i_mode))
|
|
return;
|
|
|
|
/*
|
|
* No sense invalidating pages for new inode
|
|
* since we we have not started caching
|
|
* readahead file data yet.
|
|
*/
|
|
if (isNewInode)
|
|
return;
|
|
|
|
if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
|
|
(local_size == tmp_inode->i_size)) {
|
|
cFYI(1, ("inode exists but unchanged"));
|
|
} else {
|
|
/* file may have changed on server */
|
|
cFYI(1, ("invalidate inode, readdir detected change"));
|
|
invalidate_remote_inode(tmp_inode);
|
|
}
|
|
}
|
|
|
|
int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
|
|
{
|
|
int rc = 0;
|
|
int xid;
|
|
struct cifs_sb_info *cifs_sb;
|
|
struct cifsTconInfo *pTcon;
|
|
char *full_path = NULL;
|
|
struct inode *newinode = NULL;
|
|
|
|
cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode));
|
|
|
|
xid = GetXid();
|
|
|
|
cifs_sb = CIFS_SB(inode->i_sb);
|
|
pTcon = cifs_sb->tcon;
|
|
|
|
full_path = build_path_from_dentry(direntry);
|
|
if (full_path == NULL) {
|
|
FreeXid(xid);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
if ((pTcon->ses->capabilities & CAP_UNIX) &&
|
|
(CIFS_UNIX_POSIX_PATH_OPS_CAP &
|
|
le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
|
|
u32 oplock = 0;
|
|
FILE_UNIX_BASIC_INFO *pInfo =
|
|
kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
|
|
if (pInfo == NULL) {
|
|
rc = -ENOMEM;
|
|
goto mkdir_out;
|
|
}
|
|
|
|
mode &= ~current->fs->umask;
|
|
rc = CIFSPOSIXCreate(xid, pTcon, SMB_O_DIRECTORY | SMB_O_CREAT,
|
|
mode, NULL /* netfid */, pInfo, &oplock,
|
|
full_path, cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
if (rc == -EOPNOTSUPP) {
|
|
kfree(pInfo);
|
|
goto mkdir_retry_old;
|
|
} else if (rc) {
|
|
cFYI(1, ("posix mkdir returned 0x%x", rc));
|
|
d_drop(direntry);
|
|
} else {
|
|
if (pInfo->Type == cpu_to_le32(-1)) {
|
|
/* no return info, go query for it */
|
|
kfree(pInfo);
|
|
goto mkdir_get_info;
|
|
}
|
|
/*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need
|
|
to set uid/gid */
|
|
inc_nlink(inode);
|
|
if (pTcon->nocase)
|
|
direntry->d_op = &cifs_ci_dentry_ops;
|
|
else
|
|
direntry->d_op = &cifs_dentry_ops;
|
|
|
|
newinode = new_inode(inode->i_sb);
|
|
if (newinode == NULL) {
|
|
kfree(pInfo);
|
|
goto mkdir_get_info;
|
|
}
|
|
/* Is an i_ino of zero legal? */
|
|
/* Are there sanity checks we can use to ensure that
|
|
the server is really filling in that field? */
|
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
|
|
newinode->i_ino =
|
|
(unsigned long)pInfo->UniqueId;
|
|
} /* note ino incremented to unique num in new_inode */
|
|
if (inode->i_sb->s_flags & MS_NOATIME)
|
|
newinode->i_flags |= S_NOATIME | S_NOCMTIME;
|
|
newinode->i_nlink = 2;
|
|
|
|
insert_inode_hash(newinode);
|
|
d_instantiate(direntry, newinode);
|
|
|
|
/* we already checked in POSIXCreate whether
|
|
frame was long enough */
|
|
posix_fill_in_inode(direntry->d_inode,
|
|
pInfo, 1 /* NewInode */);
|
|
#ifdef CONFIG_CIFS_DEBUG2
|
|
cFYI(1, ("instantiated dentry %p %s to inode %p",
|
|
direntry, direntry->d_name.name, newinode));
|
|
|
|
if (newinode->i_nlink != 2)
|
|
cFYI(1, ("unexpected number of links %d",
|
|
newinode->i_nlink));
|
|
#endif
|
|
}
|
|
kfree(pInfo);
|
|
goto mkdir_out;
|
|
}
|
|
mkdir_retry_old:
|
|
/* BB add setting the equivalent of mode via CreateX w/ACLs */
|
|
rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
if (rc) {
|
|
cFYI(1, ("cifs_mkdir returned 0x%x", rc));
|
|
d_drop(direntry);
|
|
} else {
|
|
mkdir_get_info:
|
|
inc_nlink(inode);
|
|
if (pTcon->unix_ext)
|
|
rc = cifs_get_inode_info_unix(&newinode, full_path,
|
|
inode->i_sb, xid);
|
|
else
|
|
rc = cifs_get_inode_info(&newinode, full_path, NULL,
|
|
inode->i_sb, xid, NULL);
|
|
|
|
if (pTcon->nocase)
|
|
direntry->d_op = &cifs_ci_dentry_ops;
|
|
else
|
|
direntry->d_op = &cifs_dentry_ops;
|
|
d_instantiate(direntry, newinode);
|
|
/* setting nlink not necessary except in cases where we
|
|
* failed to get it from the server or was set bogus */
|
|
if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2))
|
|
direntry->d_inode->i_nlink = 2;
|
|
if (pTcon->unix_ext) {
|
|
mode &= ~current->fs->umask;
|
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
|
|
CIFSSMBUnixSetPerms(xid, pTcon, full_path,
|
|
mode,
|
|
(__u64)current->fsuid,
|
|
(__u64)current->fsgid,
|
|
0 /* dev_t */,
|
|
cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
} else {
|
|
CIFSSMBUnixSetPerms(xid, pTcon, full_path,
|
|
mode, (__u64)-1,
|
|
(__u64)-1, 0 /* dev_t */,
|
|
cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
}
|
|
} else {
|
|
/* BB to be implemented via Windows secrty descriptors
|
|
eg CIFSSMBWinSetPerms(xid, pTcon, full_path, mode,
|
|
-1, -1, local_nls); */
|
|
if (direntry->d_inode) {
|
|
direntry->d_inode->i_mode = mode;
|
|
direntry->d_inode->i_mode |= S_IFDIR;
|
|
if (cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_SET_UID) {
|
|
direntry->d_inode->i_uid =
|
|
current->fsuid;
|
|
direntry->d_inode->i_gid =
|
|
current->fsgid;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
mkdir_out:
|
|
kfree(full_path);
|
|
FreeXid(xid);
|
|
return rc;
|
|
}
|
|
|
|
int cifs_rmdir(struct inode *inode, struct dentry *direntry)
|
|
{
|
|
int rc = 0;
|
|
int xid;
|
|
struct cifs_sb_info *cifs_sb;
|
|
struct cifsTconInfo *pTcon;
|
|
char *full_path = NULL;
|
|
struct cifsInodeInfo *cifsInode;
|
|
|
|
cFYI(1, ("cifs_rmdir, inode = 0x%p", inode));
|
|
|
|
xid = GetXid();
|
|
|
|
cifs_sb = CIFS_SB(inode->i_sb);
|
|
pTcon = cifs_sb->tcon;
|
|
|
|
full_path = build_path_from_dentry(direntry);
|
|
if (full_path == NULL) {
|
|
FreeXid(xid);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
|
|
if (!rc) {
|
|
drop_nlink(inode);
|
|
spin_lock(&direntry->d_inode->i_lock);
|
|
i_size_write(direntry->d_inode, 0);
|
|
clear_nlink(direntry->d_inode);
|
|
spin_unlock(&direntry->d_inode->i_lock);
|
|
}
|
|
|
|
cifsInode = CIFS_I(direntry->d_inode);
|
|
cifsInode->time = 0; /* force revalidate to go get info when
|
|
needed */
|
|
direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
|
|
current_fs_time(inode->i_sb);
|
|
|
|
kfree(full_path);
|
|
FreeXid(xid);
|
|
return rc;
|
|
}
|
|
|
|
int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
|
|
struct inode *target_inode, struct dentry *target_direntry)
|
|
{
|
|
char *fromName;
|
|
char *toName;
|
|
struct cifs_sb_info *cifs_sb_source;
|
|
struct cifs_sb_info *cifs_sb_target;
|
|
struct cifsTconInfo *pTcon;
|
|
int xid;
|
|
int rc = 0;
|
|
|
|
xid = GetXid();
|
|
|
|
cifs_sb_target = CIFS_SB(target_inode->i_sb);
|
|
cifs_sb_source = CIFS_SB(source_inode->i_sb);
|
|
pTcon = cifs_sb_source->tcon;
|
|
|
|
if (pTcon != cifs_sb_target->tcon) {
|
|
FreeXid(xid);
|
|
return -EXDEV; /* BB actually could be allowed if same server,
|
|
but different share.
|
|
Might eventually add support for this */
|
|
}
|
|
|
|
/* we already have the rename sem so we do not need to grab it again
|
|
here to protect the path integrity */
|
|
fromName = build_path_from_dentry(source_direntry);
|
|
toName = build_path_from_dentry(target_direntry);
|
|
if ((fromName == NULL) || (toName == NULL)) {
|
|
rc = -ENOMEM;
|
|
goto cifs_rename_exit;
|
|
}
|
|
|
|
rc = CIFSSMBRename(xid, pTcon, fromName, toName,
|
|
cifs_sb_source->local_nls,
|
|
cifs_sb_source->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
if (rc == -EEXIST) {
|
|
/* check if they are the same file because rename of hardlinked
|
|
files is a noop */
|
|
FILE_UNIX_BASIC_INFO *info_buf_source;
|
|
FILE_UNIX_BASIC_INFO *info_buf_target;
|
|
|
|
info_buf_source =
|
|
kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
|
|
if (info_buf_source != NULL) {
|
|
info_buf_target = info_buf_source + 1;
|
|
if (pTcon->unix_ext)
|
|
rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
|
|
info_buf_source,
|
|
cifs_sb_source->local_nls,
|
|
cifs_sb_source->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
/* else rc is still EEXIST so will fall through to
|
|
unlink the target and retry rename */
|
|
if (rc == 0) {
|
|
rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
|
|
info_buf_target,
|
|
cifs_sb_target->local_nls,
|
|
/* remap based on source sb */
|
|
cifs_sb_source->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
}
|
|
if ((rc == 0) &&
|
|
(info_buf_source->UniqueId ==
|
|
info_buf_target->UniqueId)) {
|
|
/* do not rename since the files are hardlinked which
|
|
is a noop */
|
|
} else {
|
|
/* we either can not tell the files are hardlinked
|
|
(as with Windows servers) or files are not
|
|
hardlinked so delete the target manually before
|
|
renaming to follow POSIX rather than Windows
|
|
semantics */
|
|
cifs_unlink(target_inode, target_direntry);
|
|
rc = CIFSSMBRename(xid, pTcon, fromName,
|
|
toName,
|
|
cifs_sb_source->local_nls,
|
|
cifs_sb_source->mnt_cifs_flags
|
|
& CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
}
|
|
kfree(info_buf_source);
|
|
} /* if we can not get memory just leave rc as EEXIST */
|
|
}
|
|
|
|
if (rc)
|
|
cFYI(1, ("rename rc %d", rc));
|
|
|
|
if ((rc == -EIO) || (rc == -EEXIST)) {
|
|
int oplock = FALSE;
|
|
__u16 netfid;
|
|
|
|
/* BB FIXME Is Generic Read correct for rename? */
|
|
/* if renaming directory - we should not say CREATE_NOT_DIR,
|
|
need to test renaming open directory, also GENERIC_READ
|
|
might not right be right access to request */
|
|
rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
|
|
CREATE_NOT_DIR, &netfid, &oplock, NULL,
|
|
cifs_sb_source->local_nls,
|
|
cifs_sb_source->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
if (rc == 0) {
|
|
rc = CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
|
|
cifs_sb_source->local_nls,
|
|
cifs_sb_source->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
CIFSSMBClose(xid, pTcon, netfid);
|
|
}
|
|
}
|
|
|
|
cifs_rename_exit:
|
|
kfree(fromName);
|
|
kfree(toName);
|
|
FreeXid(xid);
|
|
return rc;
|
|
}
|
|
|
|
int cifs_revalidate(struct dentry *direntry)
|
|
{
|
|
int xid;
|
|
int rc = 0, wbrc = 0;
|
|
char *full_path;
|
|
struct cifs_sb_info *cifs_sb;
|
|
struct cifsInodeInfo *cifsInode;
|
|
loff_t local_size;
|
|
struct timespec local_mtime;
|
|
int invalidate_inode = FALSE;
|
|
|
|
if (direntry->d_inode == NULL)
|
|
return -ENOENT;
|
|
|
|
cifsInode = CIFS_I(direntry->d_inode);
|
|
|
|
if (cifsInode == NULL)
|
|
return -ENOENT;
|
|
|
|
/* no sense revalidating inode info on file that no one can write */
|
|
if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
|
|
return rc;
|
|
|
|
xid = GetXid();
|
|
|
|
cifs_sb = CIFS_SB(direntry->d_sb);
|
|
|
|
/* can not safely grab the rename sem here if rename calls revalidate
|
|
since that would deadlock */
|
|
full_path = build_path_from_dentry(direntry);
|
|
if (full_path == NULL) {
|
|
FreeXid(xid);
|
|
return -ENOMEM;
|
|
}
|
|
cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
|
|
"jiffies %ld", full_path, direntry->d_inode,
|
|
direntry->d_inode->i_count.counter, direntry,
|
|
direntry->d_time, jiffies));
|
|
|
|
if (cifsInode->time == 0) {
|
|
/* was set to zero previously to force revalidate */
|
|
} else if (time_before(jiffies, cifsInode->time + HZ) &&
|
|
lookupCacheEnabled) {
|
|
if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
|
|
(direntry->d_inode->i_nlink == 1)) {
|
|
kfree(full_path);
|
|
FreeXid(xid);
|
|
return rc;
|
|
} else {
|
|
cFYI(1, ("Have to revalidate file due to hardlinks"));
|
|
}
|
|
}
|
|
|
|
/* save mtime and size */
|
|
local_mtime = direntry->d_inode->i_mtime;
|
|
local_size = direntry->d_inode->i_size;
|
|
|
|
if (cifs_sb->tcon->unix_ext) {
|
|
rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
|
|
direntry->d_sb, xid);
|
|
if (rc) {
|
|
cFYI(1, ("error on getting revalidate info %d", rc));
|
|
/* if (rc != -ENOENT)
|
|
rc = 0; */ /* BB should we cache info on
|
|
certain errors? */
|
|
}
|
|
} else {
|
|
rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
|
|
direntry->d_sb, xid, NULL);
|
|
if (rc) {
|
|
cFYI(1, ("error on getting revalidate info %d", rc));
|
|
/* if (rc != -ENOENT)
|
|
rc = 0; */ /* BB should we cache info on
|
|
certain errors? */
|
|
}
|
|
}
|
|
/* should we remap certain errors, access denied?, to zero */
|
|
|
|
/* if not oplocked, we invalidate inode pages if mtime or file size
|
|
had changed on server */
|
|
|
|
if (timespec_equal(&local_mtime, &direntry->d_inode->i_mtime) &&
|
|
(local_size == direntry->d_inode->i_size)) {
|
|
cFYI(1, ("cifs_revalidate - inode unchanged"));
|
|
} else {
|
|
/* file may have changed on server */
|
|
if (cifsInode->clientCanCacheRead) {
|
|
/* no need to invalidate inode pages since we were the
|
|
only ones who could have modified the file and the
|
|
server copy is staler than ours */
|
|
} else {
|
|
invalidate_inode = TRUE;
|
|
}
|
|
}
|
|
|
|
/* can not grab this sem since kernel filesys locking documentation
|
|
indicates i_mutex may be taken by the kernel on lookup and rename
|
|
which could deadlock if we grab the i_mutex here as well */
|
|
/* mutex_lock(&direntry->d_inode->i_mutex);*/
|
|
/* need to write out dirty pages here */
|
|
if (direntry->d_inode->i_mapping) {
|
|
/* do we need to lock inode until after invalidate completes
|
|
below? */
|
|
wbrc = filemap_fdatawrite(direntry->d_inode->i_mapping);
|
|
if (wbrc)
|
|
CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
|
|
}
|
|
if (invalidate_inode) {
|
|
/* shrink_dcache not necessary now that cifs dentry ops
|
|
are exported for negative dentries */
|
|
/* if (S_ISDIR(direntry->d_inode->i_mode))
|
|
shrink_dcache_parent(direntry); */
|
|
if (S_ISREG(direntry->d_inode->i_mode)) {
|
|
if (direntry->d_inode->i_mapping)
|
|
wbrc = filemap_fdatawait(direntry->d_inode->i_mapping);
|
|
if (wbrc)
|
|
CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
|
|
/* may eventually have to do this for open files too */
|
|
if (list_empty(&(cifsInode->openFileList))) {
|
|
/* changed on server - flush read ahead pages */
|
|
cFYI(1, ("Invalidating read ahead data on "
|
|
"closed file"));
|
|
invalidate_remote_inode(direntry->d_inode);
|
|
}
|
|
}
|
|
}
|
|
/* mutex_unlock(&direntry->d_inode->i_mutex); */
|
|
|
|
kfree(full_path);
|
|
FreeXid(xid);
|
|
return rc;
|
|
}
|
|
|
|
int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
|
|
struct kstat *stat)
|
|
{
|
|
int err = cifs_revalidate(dentry);
|
|
if (!err) {
|
|
generic_fillattr(dentry->d_inode, stat);
|
|
stat->blksize = CIFS_MAX_MSGSIZE;
|
|
}
|
|
return err;
|
|
}
|
|
|
|
static int cifs_truncate_page(struct address_space *mapping, loff_t from)
|
|
{
|
|
pgoff_t index = from >> PAGE_CACHE_SHIFT;
|
|
unsigned offset = from & (PAGE_CACHE_SIZE - 1);
|
|
struct page *page;
|
|
int rc = 0;
|
|
|
|
page = grab_cache_page(mapping, index);
|
|
if (!page)
|
|
return -ENOMEM;
|
|
|
|
zero_user_segment(page, offset, PAGE_CACHE_SIZE);
|
|
unlock_page(page);
|
|
page_cache_release(page);
|
|
return rc;
|
|
}
|
|
|
|
static int cifs_vmtruncate(struct inode *inode, loff_t offset)
|
|
{
|
|
struct address_space *mapping = inode->i_mapping;
|
|
unsigned long limit;
|
|
|
|
spin_lock(&inode->i_lock);
|
|
if (inode->i_size < offset)
|
|
goto do_expand;
|
|
/*
|
|
* truncation of in-use swapfiles is disallowed - it would cause
|
|
* subsequent swapout to scribble on the now-freed blocks.
|
|
*/
|
|
if (IS_SWAPFILE(inode)) {
|
|
spin_unlock(&inode->i_lock);
|
|
goto out_busy;
|
|
}
|
|
i_size_write(inode, offset);
|
|
spin_unlock(&inode->i_lock);
|
|
/*
|
|
* unmap_mapping_range is called twice, first simply for efficiency
|
|
* so that truncate_inode_pages does fewer single-page unmaps. However
|
|
* after this first call, and before truncate_inode_pages finishes,
|
|
* it is possible for private pages to be COWed, which remain after
|
|
* truncate_inode_pages finishes, hence the second unmap_mapping_range
|
|
* call must be made for correctness.
|
|
*/
|
|
unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
|
|
truncate_inode_pages(mapping, offset);
|
|
unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
|
|
goto out_truncate;
|
|
|
|
do_expand:
|
|
limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
|
|
if (limit != RLIM_INFINITY && offset > limit) {
|
|
spin_unlock(&inode->i_lock);
|
|
goto out_sig;
|
|
}
|
|
if (offset > inode->i_sb->s_maxbytes) {
|
|
spin_unlock(&inode->i_lock);
|
|
goto out_big;
|
|
}
|
|
i_size_write(inode, offset);
|
|
spin_unlock(&inode->i_lock);
|
|
out_truncate:
|
|
if (inode->i_op && inode->i_op->truncate)
|
|
inode->i_op->truncate(inode);
|
|
return 0;
|
|
out_sig:
|
|
send_sig(SIGXFSZ, current, 0);
|
|
out_big:
|
|
return -EFBIG;
|
|
out_busy:
|
|
return -ETXTBSY;
|
|
}
|
|
|
|
int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
|
|
{
|
|
int xid;
|
|
struct cifs_sb_info *cifs_sb;
|
|
struct cifsTconInfo *pTcon;
|
|
char *full_path = NULL;
|
|
int rc = -EACCES;
|
|
struct cifsFileInfo *open_file = NULL;
|
|
FILE_BASIC_INFO time_buf;
|
|
int set_time = FALSE;
|
|
int set_dosattr = FALSE;
|
|
__u64 mode = 0xFFFFFFFFFFFFFFFFULL;
|
|
__u64 uid = 0xFFFFFFFFFFFFFFFFULL;
|
|
__u64 gid = 0xFFFFFFFFFFFFFFFFULL;
|
|
struct cifsInodeInfo *cifsInode;
|
|
|
|
xid = GetXid();
|
|
|
|
cFYI(1, ("setattr on file %s attrs->iavalid 0x%x",
|
|
direntry->d_name.name, attrs->ia_valid));
|
|
|
|
cifs_sb = CIFS_SB(direntry->d_inode->i_sb);
|
|
pTcon = cifs_sb->tcon;
|
|
|
|
if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
|
|
/* check if we have permission to change attrs */
|
|
rc = inode_change_ok(direntry->d_inode, attrs);
|
|
if (rc < 0) {
|
|
FreeXid(xid);
|
|
return rc;
|
|
} else
|
|
rc = 0;
|
|
}
|
|
|
|
full_path = build_path_from_dentry(direntry);
|
|
if (full_path == NULL) {
|
|
FreeXid(xid);
|
|
return -ENOMEM;
|
|
}
|
|
cifsInode = CIFS_I(direntry->d_inode);
|
|
|
|
if ((attrs->ia_valid & ATTR_MTIME) || (attrs->ia_valid & ATTR_SIZE)) {
|
|
/*
|
|
Flush data before changing file size or changing the last
|
|
write time of the file on the server. If the
|
|
flush returns error, store it to report later and continue.
|
|
BB: This should be smarter. Why bother flushing pages that
|
|
will be truncated anyway? Also, should we error out here if
|
|
the flush returns error?
|
|
*/
|
|
rc = filemap_write_and_wait(direntry->d_inode->i_mapping);
|
|
if (rc != 0) {
|
|
CIFS_I(direntry->d_inode)->write_behind_rc = rc;
|
|
rc = 0;
|
|
}
|
|
}
|
|
|
|
if (attrs->ia_valid & ATTR_SIZE) {
|
|
/* To avoid spurious oplock breaks from server, in the case of
|
|
inodes that we already have open, avoid doing path based
|
|
setting of file size if we can do it by handle.
|
|
This keeps our caching token (oplock) and avoids timeouts
|
|
when the local oplock break takes longer to flush
|
|
writebehind data than the SMB timeout for the SetPathInfo
|
|
request would allow */
|
|
|
|
open_file = find_writable_file(cifsInode);
|
|
if (open_file) {
|
|
__u16 nfid = open_file->netfid;
|
|
__u32 npid = open_file->pid;
|
|
rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size,
|
|
nfid, npid, FALSE);
|
|
atomic_dec(&open_file->wrtPending);
|
|
cFYI(1, ("SetFSize for attrs rc = %d", rc));
|
|
if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
|
|
unsigned int bytes_written;
|
|
rc = CIFSSMBWrite(xid, pTcon,
|
|
nfid, 0, attrs->ia_size,
|
|
&bytes_written, NULL, NULL,
|
|
1 /* 45 seconds */);
|
|
cFYI(1, ("Wrt seteof rc %d", rc));
|
|
}
|
|
} else
|
|
rc = -EINVAL;
|
|
|
|
if (rc != 0) {
|
|
/* Set file size by pathname rather than by handle
|
|
either because no valid, writeable file handle for
|
|
it was found or because there was an error setting
|
|
it by handle */
|
|
rc = CIFSSMBSetEOF(xid, pTcon, full_path,
|
|
attrs->ia_size, FALSE,
|
|
cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
|
|
if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
|
|
__u16 netfid;
|
|
int oplock = FALSE;
|
|
|
|
rc = SMBLegacyOpen(xid, pTcon, full_path,
|
|
FILE_OPEN,
|
|
SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
|
|
CREATE_NOT_DIR, &netfid, &oplock,
|
|
NULL, cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
if (rc == 0) {
|
|
unsigned int bytes_written;
|
|
rc = CIFSSMBWrite(xid, pTcon,
|
|
netfid, 0,
|
|
attrs->ia_size,
|
|
&bytes_written, NULL,
|
|
NULL, 1 /* 45 sec */);
|
|
cFYI(1, ("wrt seteof rc %d", rc));
|
|
CIFSSMBClose(xid, pTcon, netfid);
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
/* Server is ok setting allocation size implicitly - no need
|
|
to call:
|
|
CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, TRUE,
|
|
cifs_sb->local_nls);
|
|
*/
|
|
|
|
if (rc == 0) {
|
|
rc = cifs_vmtruncate(direntry->d_inode, attrs->ia_size);
|
|
cifs_truncate_page(direntry->d_inode->i_mapping,
|
|
direntry->d_inode->i_size);
|
|
} else
|
|
goto cifs_setattr_exit;
|
|
}
|
|
if (attrs->ia_valid & ATTR_UID) {
|
|
cFYI(1, ("UID changed to %d", attrs->ia_uid));
|
|
uid = attrs->ia_uid;
|
|
}
|
|
if (attrs->ia_valid & ATTR_GID) {
|
|
cFYI(1, ("GID changed to %d", attrs->ia_gid));
|
|
gid = attrs->ia_gid;
|
|
}
|
|
|
|
time_buf.Attributes = 0;
|
|
|
|
/* skip mode change if it's just for clearing setuid/setgid */
|
|
if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
|
|
attrs->ia_valid &= ~ATTR_MODE;
|
|
|
|
if (attrs->ia_valid & ATTR_MODE) {
|
|
cFYI(1, ("Mode changed to 0x%x", attrs->ia_mode));
|
|
mode = attrs->ia_mode;
|
|
}
|
|
|
|
if ((pTcon->unix_ext)
|
|
&& (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID)))
|
|
rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, uid, gid,
|
|
0 /* dev_t */, cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
else if (attrs->ia_valid & ATTR_MODE) {
|
|
rc = 0;
|
|
#ifdef CONFIG_CIFS_EXPERIMENTAL
|
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
|
|
rc = mode_to_acl(direntry->d_inode, full_path, mode);
|
|
else if ((mode & S_IWUGO) == 0) {
|
|
#else
|
|
if ((mode & S_IWUGO) == 0) {
|
|
#endif
|
|
/* not writeable */
|
|
if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
|
|
set_dosattr = TRUE;
|
|
time_buf.Attributes =
|
|
cpu_to_le32(cifsInode->cifsAttrs |
|
|
ATTR_READONLY);
|
|
}
|
|
} else if (cifsInode->cifsAttrs & ATTR_READONLY) {
|
|
/* If file is readonly on server, we would
|
|
not be able to write to it - so if any write
|
|
bit is enabled for user or group or other we
|
|
need to at least try to remove r/o dos attr */
|
|
set_dosattr = TRUE;
|
|
time_buf.Attributes = cpu_to_le32(cifsInode->cifsAttrs &
|
|
(~ATTR_READONLY));
|
|
/* Windows ignores set to zero */
|
|
if (time_buf.Attributes == 0)
|
|
time_buf.Attributes |= cpu_to_le32(ATTR_NORMAL);
|
|
}
|
|
#ifdef CONFIG_CIFS_EXPERIMENTAL
|
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
|
|
mode_to_acl(direntry->d_inode, full_path, mode);
|
|
#endif
|
|
}
|
|
|
|
if (attrs->ia_valid & ATTR_ATIME) {
|
|
set_time = TRUE;
|
|
time_buf.LastAccessTime =
|
|
cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
|
|
} else
|
|
time_buf.LastAccessTime = 0;
|
|
|
|
if (attrs->ia_valid & ATTR_MTIME) {
|
|
set_time = TRUE;
|
|
time_buf.LastWriteTime =
|
|
cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
|
|
} else
|
|
time_buf.LastWriteTime = 0;
|
|
/* Do not set ctime explicitly unless other time
|
|
stamps are changed explicitly (i.e. by utime()
|
|
since we would then have a mix of client and
|
|
server times */
|
|
|
|
if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
|
|
set_time = TRUE;
|
|
/* Although Samba throws this field away
|
|
it may be useful to Windows - but we do
|
|
not want to set ctime unless some other
|
|
timestamp is changing */
|
|
cFYI(1, ("CIFS - CTIME changed"));
|
|
time_buf.ChangeTime =
|
|
cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
|
|
} else
|
|
time_buf.ChangeTime = 0;
|
|
|
|
if (set_time || set_dosattr) {
|
|
time_buf.CreationTime = 0; /* do not change */
|
|
/* In the future we should experiment - try setting timestamps
|
|
via Handle (SetFileInfo) instead of by path */
|
|
if (!(pTcon->ses->flags & CIFS_SES_NT4))
|
|
rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf,
|
|
cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
else
|
|
rc = -EOPNOTSUPP;
|
|
|
|
if (rc == -EOPNOTSUPP) {
|
|
int oplock = FALSE;
|
|
__u16 netfid;
|
|
|
|
cFYI(1, ("calling SetFileInfo since SetPathInfo for "
|
|
"times not supported by this server"));
|
|
/* BB we could scan to see if we already have it open
|
|
and pass in pid of opener to function */
|
|
rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
|
|
SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
|
|
CREATE_NOT_DIR, &netfid, &oplock,
|
|
NULL, cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
if (rc == 0) {
|
|
rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf,
|
|
netfid);
|
|
CIFSSMBClose(xid, pTcon, netfid);
|
|
} else {
|
|
/* BB For even older servers we could convert time_buf
|
|
into old DOS style which uses two second
|
|
granularity */
|
|
|
|
/* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path,
|
|
&time_buf, cifs_sb->local_nls); */
|
|
}
|
|
}
|
|
/* Even if error on time set, no sense failing the call if
|
|
the server would set the time to a reasonable value anyway,
|
|
and this check ensures that we are not being called from
|
|
sys_utimes in which case we ought to fail the call back to
|
|
the user when the server rejects the call */
|
|
if ((rc) && (attrs->ia_valid &
|
|
(ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
|
|
rc = 0;
|
|
}
|
|
|
|
/* do not need local check to inode_check_ok since the server does
|
|
that */
|
|
if (!rc)
|
|
rc = inode_setattr(direntry->d_inode, attrs);
|
|
cifs_setattr_exit:
|
|
kfree(full_path);
|
|
FreeXid(xid);
|
|
return rc;
|
|
}
|
|
|
|
#if 0
|
|
void cifs_delete_inode(struct inode *inode)
|
|
{
|
|
cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode));
|
|
/* may have to add back in if and when safe distributed caching of
|
|
directories added e.g. via FindNotify */
|
|
}
|
|
#endif
|