![Steve French](/assets/img/avatar_default.png)
Windows allows you to deny access to the top of a share, but permit access to a directory lower in the path. With the prefixpath feature of cifs (ie mounting \\server\share\directory\subdirectory\etc.) this should have worked if the user specified a prefixpath which put the root of the mount at a directory to which he had access, but we still were doing a lookup on the root of the share (null path) when we should have been doing it on the prefixpath subdirectory. This fixes Samba bug # 5925 Acked-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2002 lines
55 KiB
C
2002 lines
55 KiB
C
/*
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* fs/cifs/inode.c
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*
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* Copyright (C) International Business Machines Corp., 2002,2008
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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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/*
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* Needed to setup inode data for the directory which is the
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* junction to the new submount (ie to setup the fake directory
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* which represents a DFS referral)
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*/
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static void fill_fake_finddataunix(FILE_UNIX_BASIC_INFO *pfnd_dat,
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struct super_block *sb)
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{
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struct inode *pinode = NULL;
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memset(pfnd_dat, 0, sizeof(FILE_UNIX_BASIC_INFO));
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/* __le64 pfnd_dat->EndOfFile = cpu_to_le64(0);
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__le64 pfnd_dat->NumOfBytes = cpu_to_le64(0);
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__u64 UniqueId = 0; */
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pfnd_dat->LastStatusChange =
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cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
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pfnd_dat->LastAccessTime =
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cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
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pfnd_dat->LastModificationTime =
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cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
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pfnd_dat->Type = cpu_to_le32(UNIX_DIR);
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pfnd_dat->Permissions = cpu_to_le64(S_IXUGO | S_IRWXU);
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pfnd_dat->Nlinks = cpu_to_le64(2);
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if (sb->s_root)
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pinode = sb->s_root->d_inode;
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if (pinode == NULL)
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return;
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/* fill in default values for the remaining based on root
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inode since we can not query the server for this inode info */
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pfnd_dat->DevMajor = cpu_to_le64(MAJOR(pinode->i_rdev));
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pfnd_dat->DevMinor = cpu_to_le64(MINOR(pinode->i_rdev));
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pfnd_dat->Uid = cpu_to_le64(pinode->i_uid);
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pfnd_dat->Gid = cpu_to_le64(pinode->i_gid);
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}
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int cifs_get_inode_info_unix(struct inode **pinode,
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const unsigned char *full_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 find_data;
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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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bool is_dfs_referral = false;
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struct cifsInodeInfo *cifsInfo;
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__u64 num_of_bytes;
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__u64 end_of_file;
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pTcon = cifs_sb->tcon;
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cFYI(1, ("Getting info on %s", full_path));
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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, &find_data,
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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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if (rc == -EREMOTE && !is_dfs_referral) {
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is_dfs_referral = true;
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cFYI(DBG2, ("DFS ref"));
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/* for DFS, server does not give us real inode data */
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fill_fake_finddataunix(&find_data, sb);
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rc = 0;
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} else if (rc)
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goto cgiiu_exit;
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num_of_bytes = le64_to_cpu(find_data.NumOfBytes);
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end_of_file = le64_to_cpu(find_data.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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/* note ino incremented to unique num in new_inode */
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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 = (unsigned long)find_data.UniqueId;
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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, &find_data, 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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cgiiu_exit:
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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 = 0;
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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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#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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* Needed to setup inode data for the directory which is the
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* junction to the new submount (ie to setup the fake directory
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* which represents a DFS referral)
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*/
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static void fill_fake_finddata(FILE_ALL_INFO *pfnd_dat,
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struct super_block *sb)
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{
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memset(pfnd_dat, 0, sizeof(FILE_ALL_INFO));
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/* __le64 pfnd_dat->AllocationSize = cpu_to_le64(0);
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__le64 pfnd_dat->EndOfFile = cpu_to_le64(0);
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__u8 pfnd_dat->DeletePending = 0;
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__u8 pfnd_data->Directory = 0;
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__le32 pfnd_dat->EASize = 0;
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__u64 pfnd_dat->IndexNumber = 0;
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__u64 pfnd_dat->IndexNumber1 = 0; */
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pfnd_dat->CreationTime =
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cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
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pfnd_dat->LastAccessTime =
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cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
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pfnd_dat->LastWriteTime =
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cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
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pfnd_dat->ChangeTime =
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cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
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pfnd_dat->Attributes = cpu_to_le32(ATTR_DIRECTORY);
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pfnd_dat->NumberOfLinks = cpu_to_le32(2);
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}
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int cifs_get_inode_info(struct inode **pinode,
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const unsigned char *full_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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__u32 attr;
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struct cifsInodeInfo *cifsInfo;
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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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char *buf = NULL;
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bool adjustTZ = false;
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bool is_dfs_referral = false;
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umode_t default_mode;
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pTcon = cifs_sb->tcon;
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cFYI(1, ("Getting info on %s", full_path));
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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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/* 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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/* could do find first instead but this returns more info */
|
|
rc = CIFSSMBQPathInfo(xid, pTcon, full_path, pfindData,
|
|
0 /* not legacy */,
|
|
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
|
|
when server claims no NT SMB support and the above call
|
|
failed at least once - set flag in tcon or mount */
|
|
if ((rc == -EOPNOTSUPP) || (rc == -EINVAL)) {
|
|
rc = SMBQueryInformation(xid, pTcon, full_path,
|
|
pfindData, cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
adjustTZ = true;
|
|
}
|
|
}
|
|
/* dump_mem("\nQPathInfo return data",&findData, sizeof(findData)); */
|
|
if (rc == -EREMOTE) {
|
|
is_dfs_referral = true;
|
|
fill_fake_finddata(pfindData, sb);
|
|
rc = 0;
|
|
} else if (rc)
|
|
goto cgii_exit;
|
|
|
|
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,
|
|
full_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;
|
|
cifsInfo->delete_pending = pfindData->DeletePending ? true : false;
|
|
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(DBG2, ("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;
|
|
}
|
|
|
|
/* get default inode mode */
|
|
if (attr & ATTR_DIRECTORY)
|
|
default_mode = cifs_sb->mnt_dir_mode;
|
|
else
|
|
default_mode = cifs_sb->mnt_file_mode;
|
|
|
|
/* set permission bits */
|
|
if (atomic_read(&cifsInfo->inUse) == 0 ||
|
|
(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0)
|
|
inode->i_mode = default_mode;
|
|
else {
|
|
/* just reenable write bits if !ATTR_READONLY */
|
|
if ((inode->i_mode & S_IWUGO) == 0 &&
|
|
(attr & ATTR_READONLY) == 0)
|
|
inode->i_mode |= (S_IWUGO & default_mode);
|
|
|
|
inode->i_mode &= ~S_IFMT;
|
|
}
|
|
/* clear write bits if ATTR_READONLY is set */
|
|
if (attr & ATTR_READONLY)
|
|
inode->i_mode &= ~S_IWUGO;
|
|
|
|
/* set inode type */
|
|
if ((attr & ATTR_SYSTEM) &&
|
|
(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)) {
|
|
/* no need to fix endianness on 0 */
|
|
if (pfindData->EndOfFile == 0)
|
|
inode->i_mode |= S_IFIFO;
|
|
else if (decode_sfu_inode(inode,
|
|
le64_to_cpu(pfindData->EndOfFile),
|
|
full_path, cifs_sb, xid))
|
|
cFYI(1, ("unknown SFU file type\n"));
|
|
} else {
|
|
if (attr & ATTR_DIRECTORY)
|
|
inode->i_mode |= S_IFDIR;
|
|
else
|
|
inode->i_mode |= S_IFREG;
|
|
}
|
|
|
|
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, full_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, full_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:
|
|
kfree(buf);
|
|
return rc;
|
|
}
|
|
|
|
static const struct inode_operations cifs_ipc_inode_ops = {
|
|
.lookup = cifs_lookup,
|
|
};
|
|
|
|
static char *build_path_to_root(struct cifs_sb_info *cifs_sb)
|
|
{
|
|
int pplen = cifs_sb->prepathlen;
|
|
int dfsplen;
|
|
char *full_path = NULL;
|
|
|
|
/* if no prefix path, simply set path to the root of share to "" */
|
|
if (pplen == 0) {
|
|
full_path = kmalloc(1, GFP_KERNEL);
|
|
if (full_path)
|
|
full_path[0] = 0;
|
|
return full_path;
|
|
}
|
|
|
|
if (cifs_sb->tcon && (cifs_sb->tcon->Flags & SMB_SHARE_IS_IN_DFS))
|
|
dfsplen = strnlen(cifs_sb->tcon->treeName, MAX_TREE_SIZE + 1);
|
|
else
|
|
dfsplen = 0;
|
|
|
|
full_path = kmalloc(dfsplen + pplen + 1, GFP_KERNEL);
|
|
if (full_path == NULL)
|
|
return full_path;
|
|
|
|
if (dfsplen) {
|
|
strncpy(full_path, cifs_sb->tcon->treeName, dfsplen);
|
|
/* switch slash direction in prepath depending on whether
|
|
* windows or posix style path names
|
|
*/
|
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) {
|
|
int i;
|
|
for (i = 0; i < dfsplen; i++) {
|
|
if (full_path[i] == '\\')
|
|
full_path[i] = '/';
|
|
}
|
|
}
|
|
}
|
|
strncpy(full_path + dfsplen, cifs_sb->prepath, pplen);
|
|
full_path[dfsplen + pplen] = 0; /* add trailing null */
|
|
return full_path;
|
|
}
|
|
|
|
/* 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;
|
|
char *full_path;
|
|
|
|
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);
|
|
full_path = build_path_to_root(cifs_sb);
|
|
if (full_path == NULL)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
xid = GetXid();
|
|
if (cifs_sb->tcon->unix_ext)
|
|
rc = cifs_get_inode_info_unix(&inode, full_path, inode->i_sb,
|
|
xid);
|
|
else
|
|
rc = cifs_get_inode_info(&inode, full_path, 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;
|
|
} else if (rc) {
|
|
kfree(full_path);
|
|
_FreeXid(xid);
|
|
iget_failed(inode);
|
|
return ERR_PTR(rc);
|
|
}
|
|
|
|
unlock_new_inode(inode);
|
|
|
|
kfree(full_path);
|
|
/* can not call macro FreeXid here since in a void func
|
|
* TODO: This is no longer true
|
|
*/
|
|
_FreeXid(xid);
|
|
return inode;
|
|
}
|
|
|
|
static int
|
|
cifs_set_file_info(struct inode *inode, struct iattr *attrs, int xid,
|
|
char *full_path, __u32 dosattr)
|
|
{
|
|
int rc;
|
|
int oplock = 0;
|
|
__u16 netfid;
|
|
__u32 netpid;
|
|
bool set_time = false;
|
|
struct cifsFileInfo *open_file;
|
|
struct cifsInodeInfo *cifsInode = CIFS_I(inode);
|
|
struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
|
|
struct cifsTconInfo *pTcon = cifs_sb->tcon;
|
|
FILE_BASIC_INFO info_buf;
|
|
|
|
if (attrs->ia_valid & ATTR_ATIME) {
|
|
set_time = true;
|
|
info_buf.LastAccessTime =
|
|
cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
|
|
} else
|
|
info_buf.LastAccessTime = 0;
|
|
|
|
if (attrs->ia_valid & ATTR_MTIME) {
|
|
set_time = true;
|
|
info_buf.LastWriteTime =
|
|
cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
|
|
} else
|
|
info_buf.LastWriteTime = 0;
|
|
|
|
/*
|
|
* Samba throws this field away, but windows may actually use it.
|
|
* Do not set ctime unless other time stamps are changed explicitly
|
|
* (i.e. by utimes()) since we would then have a mix of client and
|
|
* server times.
|
|
*/
|
|
if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
|
|
cFYI(1, ("CIFS - CTIME changed"));
|
|
info_buf.ChangeTime =
|
|
cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
|
|
} else
|
|
info_buf.ChangeTime = 0;
|
|
|
|
info_buf.CreationTime = 0; /* don't change */
|
|
info_buf.Attributes = cpu_to_le32(dosattr);
|
|
|
|
/*
|
|
* If the file is already open for write, just use that fileid
|
|
*/
|
|
open_file = find_writable_file(cifsInode);
|
|
if (open_file) {
|
|
netfid = open_file->netfid;
|
|
netpid = open_file->pid;
|
|
goto set_via_filehandle;
|
|
}
|
|
|
|
/*
|
|
* NT4 apparently returns success on this call, but it doesn't
|
|
* really work.
|
|
*/
|
|
if (!(pTcon->ses->flags & CIFS_SES_NT4)) {
|
|
rc = CIFSSMBSetPathInfo(xid, pTcon, full_path,
|
|
&info_buf, cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
if (rc == 0) {
|
|
cifsInode->cifsAttrs = dosattr;
|
|
goto out;
|
|
} else if (rc != -EOPNOTSUPP && rc != -EINVAL)
|
|
goto out;
|
|
}
|
|
|
|
cFYI(1, ("calling SetFileInfo since SetPathInfo for "
|
|
"times not supported by this server"));
|
|
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) {
|
|
if (rc == -EIO)
|
|
rc = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
netpid = current->tgid;
|
|
|
|
set_via_filehandle:
|
|
rc = CIFSSMBSetFileInfo(xid, pTcon, &info_buf, netfid, netpid);
|
|
if (!rc)
|
|
cifsInode->cifsAttrs = dosattr;
|
|
|
|
if (open_file == NULL)
|
|
CIFSSMBClose(xid, pTcon, netfid);
|
|
else
|
|
atomic_dec(&open_file->wrtPending);
|
|
out:
|
|
return rc;
|
|
}
|
|
|
|
/*
|
|
* open the given file (if it isn't already), set the DELETE_ON_CLOSE bit
|
|
* and rename it to a random name that hopefully won't conflict with
|
|
* anything else.
|
|
*/
|
|
static int
|
|
cifs_rename_pending_delete(char *full_path, struct dentry *dentry, int xid)
|
|
{
|
|
int oplock = 0;
|
|
int rc;
|
|
__u16 netfid;
|
|
struct inode *inode = dentry->d_inode;
|
|
struct cifsInodeInfo *cifsInode = CIFS_I(inode);
|
|
struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
|
|
struct cifsTconInfo *tcon = cifs_sb->tcon;
|
|
__u32 dosattr, origattr;
|
|
FILE_BASIC_INFO *info_buf = NULL;
|
|
|
|
rc = CIFSSMBOpen(xid, tcon, full_path, FILE_OPEN,
|
|
DELETE|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)
|
|
goto out;
|
|
|
|
origattr = cifsInode->cifsAttrs;
|
|
if (origattr == 0)
|
|
origattr |= ATTR_NORMAL;
|
|
|
|
dosattr = origattr & ~ATTR_READONLY;
|
|
if (dosattr == 0)
|
|
dosattr |= ATTR_NORMAL;
|
|
dosattr |= ATTR_HIDDEN;
|
|
|
|
/* set ATTR_HIDDEN and clear ATTR_READONLY, but only if needed */
|
|
if (dosattr != origattr) {
|
|
info_buf = kzalloc(sizeof(*info_buf), GFP_KERNEL);
|
|
if (info_buf == NULL) {
|
|
rc = -ENOMEM;
|
|
goto out_close;
|
|
}
|
|
info_buf->Attributes = cpu_to_le32(dosattr);
|
|
rc = CIFSSMBSetFileInfo(xid, tcon, info_buf, netfid,
|
|
current->tgid);
|
|
/* although we would like to mark the file hidden
|
|
if that fails we will still try to rename it */
|
|
if (rc != 0)
|
|
cifsInode->cifsAttrs = dosattr;
|
|
else
|
|
dosattr = origattr; /* since not able to change them */
|
|
}
|
|
|
|
/* rename the file */
|
|
rc = CIFSSMBRenameOpenFile(xid, tcon, netfid, NULL, cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
if (rc != 0) {
|
|
rc = -ETXTBSY;
|
|
goto undo_setattr;
|
|
}
|
|
|
|
/* try to set DELETE_ON_CLOSE */
|
|
if (!cifsInode->delete_pending) {
|
|
rc = CIFSSMBSetFileDisposition(xid, tcon, true, netfid,
|
|
current->tgid);
|
|
/*
|
|
* some samba versions return -ENOENT when we try to set the
|
|
* file disposition here. Likely a samba bug, but work around
|
|
* it for now. This means that some cifsXXX files may hang
|
|
* around after they shouldn't.
|
|
*
|
|
* BB: remove this hack after more servers have the fix
|
|
*/
|
|
if (rc == -ENOENT)
|
|
rc = 0;
|
|
else if (rc != 0) {
|
|
rc = -ETXTBSY;
|
|
goto undo_rename;
|
|
}
|
|
cifsInode->delete_pending = true;
|
|
}
|
|
|
|
out_close:
|
|
CIFSSMBClose(xid, tcon, netfid);
|
|
out:
|
|
kfree(info_buf);
|
|
return rc;
|
|
|
|
/*
|
|
* reset everything back to the original state. Don't bother
|
|
* dealing with errors here since we can't do anything about
|
|
* them anyway.
|
|
*/
|
|
undo_rename:
|
|
CIFSSMBRenameOpenFile(xid, tcon, netfid, dentry->d_name.name,
|
|
cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
undo_setattr:
|
|
if (dosattr != origattr) {
|
|
info_buf->Attributes = cpu_to_le32(origattr);
|
|
if (!CIFSSMBSetFileInfo(xid, tcon, info_buf, netfid,
|
|
current->tgid))
|
|
cifsInode->cifsAttrs = origattr;
|
|
}
|
|
|
|
goto out_close;
|
|
}
|
|
|
|
int cifs_unlink(struct inode *dir, struct dentry *dentry)
|
|
{
|
|
int rc = 0;
|
|
int xid;
|
|
char *full_path = NULL;
|
|
struct inode *inode = dentry->d_inode;
|
|
struct cifsInodeInfo *cifsInode = CIFS_I(inode);
|
|
struct super_block *sb = dir->i_sb;
|
|
struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
|
|
struct cifsTconInfo *tcon = cifs_sb->tcon;
|
|
struct iattr *attrs = NULL;
|
|
__u32 dosattr = 0, origattr = 0;
|
|
|
|
cFYI(1, ("cifs_unlink, dir=0x%p, dentry=0x%p", dir, dentry));
|
|
|
|
xid = GetXid();
|
|
|
|
/* Unlink can be called from rename so we can not take the
|
|
* sb->s_vfs_rename_mutex here */
|
|
full_path = build_path_from_dentry(dentry);
|
|
if (full_path == NULL) {
|
|
FreeXid(xid);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
if ((tcon->ses->capabilities & CAP_UNIX) &&
|
|
(CIFS_UNIX_POSIX_PATH_OPS_CAP &
|
|
le64_to_cpu(tcon->fsUnixInfo.Capability))) {
|
|
rc = CIFSPOSIXDelFile(xid, tcon, 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;
|
|
}
|
|
|
|
retry_std_delete:
|
|
rc = CIFSSMBDelFile(xid, tcon, full_path, cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
|
|
psx_del_no_retry:
|
|
if (!rc) {
|
|
if (inode)
|
|
drop_nlink(inode);
|
|
} else if (rc == -ENOENT) {
|
|
d_drop(dentry);
|
|
} else if (rc == -ETXTBSY) {
|
|
rc = cifs_rename_pending_delete(full_path, dentry, xid);
|
|
if (rc == 0)
|
|
drop_nlink(inode);
|
|
} else if (rc == -EACCES && dosattr == 0) {
|
|
attrs = kzalloc(sizeof(*attrs), GFP_KERNEL);
|
|
if (attrs == NULL) {
|
|
rc = -ENOMEM;
|
|
goto out_reval;
|
|
}
|
|
|
|
/* try to reset dos attributes */
|
|
origattr = cifsInode->cifsAttrs;
|
|
if (origattr == 0)
|
|
origattr |= ATTR_NORMAL;
|
|
dosattr = origattr & ~ATTR_READONLY;
|
|
if (dosattr == 0)
|
|
dosattr |= ATTR_NORMAL;
|
|
dosattr |= ATTR_HIDDEN;
|
|
|
|
rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
|
|
if (rc != 0)
|
|
goto out_reval;
|
|
|
|
goto retry_std_delete;
|
|
}
|
|
|
|
/* undo the setattr if we errored out and it's needed */
|
|
if (rc != 0 && dosattr != 0)
|
|
cifs_set_file_info(inode, attrs, xid, full_path, origattr);
|
|
|
|
out_reval:
|
|
if (inode) {
|
|
cifsInode = CIFS_I(inode);
|
|
cifsInode->time = 0; /* will force revalidate to get info
|
|
when needed */
|
|
inode->i_ctime = current_fs_time(sb);
|
|
}
|
|
dir->i_ctime = dir->i_mtime = current_fs_time(sb);
|
|
cifsInode = CIFS_I(dir);
|
|
CIFS_I(dir)->time = 0; /* force revalidate of dir as well */
|
|
|
|
kfree(full_path);
|
|
kfree(attrs);
|
|
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, tmprc;
|
|
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;
|
|
|
|
mode &= ~current->fs->umask;
|
|
/* must turn on setgid bit if parent dir has it */
|
|
if (inode->i_mode & S_ISGID)
|
|
mode |= S_ISGID;
|
|
|
|
if (pTcon->unix_ext) {
|
|
struct cifs_unix_set_info_args args = {
|
|
.mode = mode,
|
|
.ctime = NO_CHANGE_64,
|
|
.atime = NO_CHANGE_64,
|
|
.mtime = NO_CHANGE_64,
|
|
.device = 0,
|
|
};
|
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
|
|
args.uid = (__u64)current->fsuid;
|
|
if (inode->i_mode & S_ISGID)
|
|
args.gid = (__u64)inode->i_gid;
|
|
else
|
|
args.gid = (__u64)current->fsgid;
|
|
} else {
|
|
args.uid = NO_CHANGE_64;
|
|
args.gid = NO_CHANGE_64;
|
|
}
|
|
CIFSSMBUnixSetInfo(xid, pTcon, full_path, &args,
|
|
cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
} else {
|
|
if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
|
|
(mode & S_IWUGO) == 0) {
|
|
FILE_BASIC_INFO pInfo;
|
|
struct cifsInodeInfo *cifsInode;
|
|
u32 dosattrs;
|
|
|
|
memset(&pInfo, 0, sizeof(pInfo));
|
|
cifsInode = CIFS_I(newinode);
|
|
dosattrs = cifsInode->cifsAttrs|ATTR_READONLY;
|
|
pInfo.Attributes = cpu_to_le32(dosattrs);
|
|
tmprc = CIFSSMBSetPathInfo(xid, pTcon,
|
|
full_path, &pInfo,
|
|
cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
if (tmprc == 0)
|
|
cifsInode->cifsAttrs = dosattrs;
|
|
}
|
|
if (direntry->d_inode) {
|
|
if (cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_DYNPERM)
|
|
direntry->d_inode->i_mode =
|
|
(mode | S_IFDIR);
|
|
|
|
if (cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_SET_UID) {
|
|
direntry->d_inode->i_uid =
|
|
current->fsuid;
|
|
if (inode->i_mode & S_ISGID)
|
|
direntry->d_inode->i_gid =
|
|
inode->i_gid;
|
|
else
|
|
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;
|
|
}
|
|
|
|
static int
|
|
cifs_do_rename(int xid, struct dentry *from_dentry, const char *fromPath,
|
|
struct dentry *to_dentry, const char *toPath)
|
|
{
|
|
struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb);
|
|
struct cifsTconInfo *pTcon = cifs_sb->tcon;
|
|
__u16 srcfid;
|
|
int oplock, rc;
|
|
|
|
/* try path-based rename first */
|
|
rc = CIFSSMBRename(xid, pTcon, fromPath, toPath, cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
|
|
/*
|
|
* don't bother with rename by filehandle unless file is busy and
|
|
* source Note that cross directory moves do not work with
|
|
* rename by filehandle to various Windows servers.
|
|
*/
|
|
if (rc == 0 || rc != -ETXTBSY)
|
|
return rc;
|
|
|
|
/* open the file to be renamed -- we need DELETE perms */
|
|
rc = CIFSSMBOpen(xid, pTcon, fromPath, FILE_OPEN, DELETE,
|
|
CREATE_NOT_DIR, &srcfid, &oplock, NULL,
|
|
cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
|
|
if (rc == 0) {
|
|
rc = CIFSSMBRenameOpenFile(xid, pTcon, srcfid,
|
|
(const char *) to_dentry->d_name.name,
|
|
cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
|
|
CIFSSMBClose(xid, pTcon, srcfid);
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
int cifs_rename(struct inode *source_dir, struct dentry *source_dentry,
|
|
struct inode *target_dir, struct dentry *target_dentry)
|
|
{
|
|
char *fromName = NULL;
|
|
char *toName = NULL;
|
|
struct cifs_sb_info *cifs_sb_source;
|
|
struct cifs_sb_info *cifs_sb_target;
|
|
struct cifsTconInfo *tcon;
|
|
FILE_UNIX_BASIC_INFO *info_buf_source = NULL;
|
|
FILE_UNIX_BASIC_INFO *info_buf_target;
|
|
int xid, rc, tmprc;
|
|
|
|
cifs_sb_target = CIFS_SB(target_dir->i_sb);
|
|
cifs_sb_source = CIFS_SB(source_dir->i_sb);
|
|
tcon = cifs_sb_source->tcon;
|
|
|
|
xid = GetXid();
|
|
|
|
/*
|
|
* BB: this might be allowed if same server, but different share.
|
|
* Consider adding support for this
|
|
*/
|
|
if (tcon != cifs_sb_target->tcon) {
|
|
rc = -EXDEV;
|
|
goto cifs_rename_exit;
|
|
}
|
|
|
|
/*
|
|
* 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_dentry);
|
|
if (fromName == NULL) {
|
|
rc = -ENOMEM;
|
|
goto cifs_rename_exit;
|
|
}
|
|
|
|
toName = build_path_from_dentry(target_dentry);
|
|
if (toName == NULL) {
|
|
rc = -ENOMEM;
|
|
goto cifs_rename_exit;
|
|
}
|
|
|
|
rc = cifs_do_rename(xid, source_dentry, fromName,
|
|
target_dentry, toName);
|
|
|
|
if (rc == -EEXIST && tcon->unix_ext) {
|
|
/*
|
|
* Are src and dst hardlinks of same inode? We can
|
|
* only tell with unix extensions enabled
|
|
*/
|
|
info_buf_source =
|
|
kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO),
|
|
GFP_KERNEL);
|
|
if (info_buf_source == NULL) {
|
|
rc = -ENOMEM;
|
|
goto cifs_rename_exit;
|
|
}
|
|
|
|
info_buf_target = info_buf_source + 1;
|
|
tmprc = CIFSSMBUnixQPathInfo(xid, tcon, fromName,
|
|
info_buf_source,
|
|
cifs_sb_source->local_nls,
|
|
cifs_sb_source->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
if (tmprc != 0)
|
|
goto unlink_target;
|
|
|
|
tmprc = CIFSSMBUnixQPathInfo(xid, tcon,
|
|
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 (tmprc == 0 && (info_buf_source->UniqueId ==
|
|
info_buf_target->UniqueId)) {
|
|
/* same file, POSIX says that this is a noop */
|
|
rc = 0;
|
|
goto cifs_rename_exit;
|
|
}
|
|
} /* else ... BB we could add the same check for Windows by
|
|
checking the UniqueId via FILE_INTERNAL_INFO */
|
|
|
|
unlink_target:
|
|
if ((rc == -EACCES) || (rc == -EEXIST)) {
|
|
tmprc = cifs_unlink(target_dir, target_dentry);
|
|
if (tmprc)
|
|
goto cifs_rename_exit;
|
|
|
|
rc = cifs_do_rename(xid, source_dentry, fromName,
|
|
target_dentry, toName);
|
|
}
|
|
|
|
cifs_rename_exit:
|
|
kfree(info_buf_source);
|
|
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;
|
|
bool 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;
|
|
}
|
|
|
|
static int
|
|
cifs_set_file_size(struct inode *inode, struct iattr *attrs,
|
|
int xid, char *full_path)
|
|
{
|
|
int rc;
|
|
struct cifsFileInfo *open_file;
|
|
struct cifsInodeInfo *cifsInode = CIFS_I(inode);
|
|
struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
|
|
struct cifsTconInfo *pTcon = cifs_sb->tcon;
|
|
|
|
/*
|
|
* 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);
|
|
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 = 0;
|
|
|
|
rc = SMBLegacyOpen(xid, pTcon, full_path,
|
|
FILE_OPEN, GENERIC_WRITE,
|
|
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);
|
|
cFYI(1, ("wrt seteof rc %d", rc));
|
|
CIFSSMBClose(xid, pTcon, netfid);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (rc == 0) {
|
|
rc = cifs_vmtruncate(inode, attrs->ia_size);
|
|
cifs_truncate_page(inode->i_mapping, inode->i_size);
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int
|
|
cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs)
|
|
{
|
|
int rc;
|
|
int xid;
|
|
char *full_path = NULL;
|
|
struct inode *inode = direntry->d_inode;
|
|
struct cifsInodeInfo *cifsInode = CIFS_I(inode);
|
|
struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
|
|
struct cifsTconInfo *pTcon = cifs_sb->tcon;
|
|
struct cifs_unix_set_info_args *args = NULL;
|
|
|
|
cFYI(1, ("setattr_unix on file %s attrs->ia_valid=0x%x",
|
|
direntry->d_name.name, attrs->ia_valid));
|
|
|
|
xid = GetXid();
|
|
|
|
if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
|
|
/* check if we have permission to change attrs */
|
|
rc = inode_change_ok(inode, attrs);
|
|
if (rc < 0)
|
|
goto out;
|
|
else
|
|
rc = 0;
|
|
}
|
|
|
|
full_path = build_path_from_dentry(direntry);
|
|
if (full_path == NULL) {
|
|
rc = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
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(inode->i_mapping);
|
|
if (rc != 0) {
|
|
cifsInode->write_behind_rc = rc;
|
|
rc = 0;
|
|
}
|
|
}
|
|
|
|
if (attrs->ia_valid & ATTR_SIZE) {
|
|
rc = cifs_set_file_size(inode, attrs, xid, full_path);
|
|
if (rc != 0)
|
|
goto out;
|
|
}
|
|
|
|
/* 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;
|
|
|
|
args = kmalloc(sizeof(*args), GFP_KERNEL);
|
|
if (args == NULL) {
|
|
rc = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
/* set up the struct */
|
|
if (attrs->ia_valid & ATTR_MODE)
|
|
args->mode = attrs->ia_mode;
|
|
else
|
|
args->mode = NO_CHANGE_64;
|
|
|
|
if (attrs->ia_valid & ATTR_UID)
|
|
args->uid = attrs->ia_uid;
|
|
else
|
|
args->uid = NO_CHANGE_64;
|
|
|
|
if (attrs->ia_valid & ATTR_GID)
|
|
args->gid = attrs->ia_gid;
|
|
else
|
|
args->gid = NO_CHANGE_64;
|
|
|
|
if (attrs->ia_valid & ATTR_ATIME)
|
|
args->atime = cifs_UnixTimeToNT(attrs->ia_atime);
|
|
else
|
|
args->atime = NO_CHANGE_64;
|
|
|
|
if (attrs->ia_valid & ATTR_MTIME)
|
|
args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime);
|
|
else
|
|
args->mtime = NO_CHANGE_64;
|
|
|
|
if (attrs->ia_valid & ATTR_CTIME)
|
|
args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime);
|
|
else
|
|
args->ctime = NO_CHANGE_64;
|
|
|
|
args->device = 0;
|
|
rc = CIFSSMBUnixSetInfo(xid, pTcon, full_path, args,
|
|
cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
|
|
if (!rc)
|
|
rc = inode_setattr(inode, attrs);
|
|
out:
|
|
kfree(args);
|
|
kfree(full_path);
|
|
FreeXid(xid);
|
|
return rc;
|
|
}
|
|
|
|
static int
|
|
cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs)
|
|
{
|
|
int xid;
|
|
struct inode *inode = direntry->d_inode;
|
|
struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
|
|
struct cifsInodeInfo *cifsInode = CIFS_I(inode);
|
|
char *full_path = NULL;
|
|
int rc = -EACCES;
|
|
__u32 dosattr = 0;
|
|
__u64 mode = NO_CHANGE_64;
|
|
|
|
xid = GetXid();
|
|
|
|
cFYI(1, ("setattr on file %s attrs->iavalid 0x%x",
|
|
direntry->d_name.name, attrs->ia_valid));
|
|
|
|
if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
|
|
/* check if we have permission to change attrs */
|
|
rc = inode_change_ok(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;
|
|
}
|
|
|
|
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(inode->i_mapping);
|
|
if (rc != 0) {
|
|
cifsInode->write_behind_rc = rc;
|
|
rc = 0;
|
|
}
|
|
}
|
|
|
|
if (attrs->ia_valid & ATTR_SIZE) {
|
|
rc = cifs_set_file_size(inode, attrs, xid, full_path);
|
|
if (rc != 0)
|
|
goto cifs_setattr_exit;
|
|
}
|
|
|
|
/*
|
|
* Without unix extensions we can't send ownership changes to the
|
|
* server, so silently ignore them. This is consistent with how
|
|
* local DOS/Windows filesystems behave (VFAT, NTFS, etc). With
|
|
* CIFSACL support + proper Windows to Unix idmapping, we may be
|
|
* able to support this in the future.
|
|
*/
|
|
if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID))
|
|
attrs->ia_valid &= ~(ATTR_UID | ATTR_GID);
|
|
|
|
/* 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 0%o", attrs->ia_mode));
|
|
mode = attrs->ia_mode;
|
|
}
|
|
|
|
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(inode, full_path, mode);
|
|
else
|
|
#endif
|
|
if (((mode & S_IWUGO) == 0) &&
|
|
(cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
|
|
|
|
dosattr = cifsInode->cifsAttrs | ATTR_READONLY;
|
|
|
|
/* fix up mode if we're not using dynperm */
|
|
if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0)
|
|
attrs->ia_mode = inode->i_mode & ~S_IWUGO;
|
|
} else if ((mode & S_IWUGO) &&
|
|
(cifsInode->cifsAttrs & ATTR_READONLY)) {
|
|
|
|
dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY;
|
|
/* Attributes of 0 are ignored */
|
|
if (dosattr == 0)
|
|
dosattr |= ATTR_NORMAL;
|
|
|
|
/* reset local inode permissions to normal */
|
|
if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
|
|
attrs->ia_mode &= ~(S_IALLUGO);
|
|
if (S_ISDIR(inode->i_mode))
|
|
attrs->ia_mode |=
|
|
cifs_sb->mnt_dir_mode;
|
|
else
|
|
attrs->ia_mode |=
|
|
cifs_sb->mnt_file_mode;
|
|
}
|
|
} else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
|
|
/* ignore mode change - ATTR_READONLY hasn't changed */
|
|
attrs->ia_valid &= ~ATTR_MODE;
|
|
}
|
|
}
|
|
|
|
if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) ||
|
|
((attrs->ia_valid & ATTR_MODE) && dosattr)) {
|
|
rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
|
|
/* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */
|
|
|
|
/* 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(inode, attrs);
|
|
cifs_setattr_exit:
|
|
kfree(full_path);
|
|
FreeXid(xid);
|
|
return rc;
|
|
}
|
|
|
|
int
|
|
cifs_setattr(struct dentry *direntry, struct iattr *attrs)
|
|
{
|
|
struct inode *inode = direntry->d_inode;
|
|
struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
|
|
struct cifsTconInfo *pTcon = cifs_sb->tcon;
|
|
|
|
if (pTcon->unix_ext)
|
|
return cifs_setattr_unix(direntry, attrs);
|
|
|
|
return cifs_setattr_nounix(direntry, attrs);
|
|
|
|
/* BB: add cifs_setattr_legacy for really old servers */
|
|
}
|
|
|
|
#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
|