![Steve French](/assets/img/avatar_default.png)
Signed-off-by: Steve French (sfrench@us.ibm.com) Signed-off-by: Linus Torvalds <torvalds@osdl.org>
1147 lines
34 KiB
C
1147 lines
34 KiB
C
/*
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* fs/cifs/inode.c
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*
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* Copyright (C) International Business Machines Corp., 2002,2005
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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/buffer_head.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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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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char *tmp_path;
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pTcon = cifs_sb->tcon;
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cFYI(1, (" Getting info on %s ", search_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, search_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) {
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tmp_path =
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kmalloc(strnlen(pTcon->treeName,
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MAX_TREE_SIZE + 1) +
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strnlen(search_path, MAX_PATHCONF) + 1,
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GFP_KERNEL);
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if (tmp_path == NULL) {
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return -ENOMEM;
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}
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/* have to skip first of the double backslash of
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UNC name */
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strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE);
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strncat(tmp_path, search_path, MAX_PATHCONF);
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rc = connect_to_dfs_path(xid, pTcon->ses,
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/* treename + */ tmp_path,
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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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kfree(tmp_path);
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/* BB fix up inode etc. */
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} else if (rc) {
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return rc;
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}
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} else {
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struct cifsInodeInfo *cifsInfo;
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__u32 type = le32_to_cpu(findData.Type);
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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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return -ENOMEM;
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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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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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inode->i_atime =
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cifs_NTtimeToUnix(le64_to_cpu(findData.LastAccessTime));
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inode->i_mtime =
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cifs_NTtimeToUnix(le64_to_cpu
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(findData.LastModificationTime));
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inode->i_ctime =
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cifs_NTtimeToUnix(le64_to_cpu(findData.LastStatusChange));
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inode->i_mode = le64_to_cpu(findData.Permissions);
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if (type == UNIX_FILE) {
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inode->i_mode |= S_IFREG;
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} else if (type == UNIX_SYMLINK) {
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inode->i_mode |= S_IFLNK;
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} else if (type == UNIX_DIR) {
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inode->i_mode |= S_IFDIR;
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} else if (type == UNIX_CHARDEV) {
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inode->i_mode |= S_IFCHR;
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inode->i_rdev = MKDEV(le64_to_cpu(findData.DevMajor),
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le64_to_cpu(findData.DevMinor) & MINORMASK);
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} else if (type == UNIX_BLOCKDEV) {
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inode->i_mode |= S_IFBLK;
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inode->i_rdev = MKDEV(le64_to_cpu(findData.DevMajor),
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le64_to_cpu(findData.DevMinor) & MINORMASK);
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} else if (type == UNIX_FIFO) {
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inode->i_mode |= S_IFIFO;
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} else if (type == UNIX_SOCKET) {
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inode->i_mode |= S_IFSOCK;
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}
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inode->i_uid = le64_to_cpu(findData.Uid);
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inode->i_gid = le64_to_cpu(findData.Gid);
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inode->i_nlink = le64_to_cpu(findData.Nlinks);
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if(is_size_safe_to_change(cifsInfo)) {
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/* can not safely change the file size here if the
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client is writing to it due to potential races */
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i_size_write(inode, end_of_file);
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/* blksize needs to be multiple of two. So safer to default to
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blksize and blkbits set in superblock so 2**blkbits and blksize
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will match rather than setting to:
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(pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
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/* This seems incredibly stupid but it turns out that i_blocks
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is not related to (i_size / i_blksize), instead 512 byte size
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is required for calculating num blocks */
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/* 512 bytes (2**9) is the fake blocksize that must be used */
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/* for this calculation */
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inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
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}
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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,
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("Size %ld and blocks %ld",
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(unsigned long) inode->i_size, inode->i_blocks));
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if (S_ISREG(inode->i_mode)) {
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cFYI(1, (" File inode "));
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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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inode->i_fop = &cifs_file_direct_ops;
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else
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inode->i_fop = &cifs_file_ops;
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inode->i_data.a_ops = &cifs_addr_ops;
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} else if (S_ISDIR(inode->i_mode)) {
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cFYI(1, (" Directory inode"));
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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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} else if (S_ISLNK(inode->i_mode)) {
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cFYI(1, (" Symbolic Link inode "));
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inode->i_op = &cifs_symlink_inode_ops;
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/* tmp_inode->i_fop = */ /* do not need to set to anything */
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} else {
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cFYI(1, (" Init special inode "));
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init_special_inode(inode, inode->i_mode,
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inode->i_rdev);
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}
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}
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return rc;
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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)
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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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char *tmp_path;
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char *buf = NULL;
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pTcon = cifs_sb->tcon;
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cFYI(1,("Getting info on %s ", search_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 */
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rc = CIFSSMBQPathInfo(xid, pTcon, search_path, pfindData,
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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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}
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/* dump_mem("\nQPathInfo return data",&findData, sizeof(findData)); */
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if (rc) {
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if (rc == -EREMOTE) {
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tmp_path =
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kmalloc(strnlen
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(pTcon->treeName,
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MAX_TREE_SIZE + 1) +
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strnlen(search_path, MAX_PATHCONF) + 1,
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GFP_KERNEL);
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if (tmp_path == NULL) {
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kfree(buf);
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return -ENOMEM;
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}
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strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE);
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strncat(tmp_path, search_path, MAX_PATHCONF);
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rc = connect_to_dfs_path(xid, pTcon->ses,
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/* treename + */ tmp_path,
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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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kfree(tmp_path);
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/* BB fix up inode etc. */
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} else if (rc) {
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kfree(buf);
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return rc;
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}
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} else {
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struct cifsInodeInfo *cifsInfo;
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__u32 attr = le32_to_cpu(pfindData->Attributes);
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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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return -ENOMEM;
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/* Is an i_ino of zero legal? Can we use that to check
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if the server supports returning inode numbers? Are
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there other sanity checks we can use to ensure that
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the server is really filling in that field? */
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/* We can not use the IndexNumber field by default from
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Windows or Samba (in ALL_INFO buf) but we can request
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it explicitly. It may not be unique presumably if
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the server has multiple devices mounted under one
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share */
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/* There may be higher info levels that work but are
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there Windows server or network appliances for which
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IndexNumber field is not guaranteed unique? */
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#ifdef CONFIG_CIFS_EXPERIMENTAL
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if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM){
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int rc1 = 0;
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__u64 inode_num;
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rc1 = CIFSGetSrvInodeNumber(xid, pTcon,
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search_path, &inode_num,
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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(rc1) {
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cFYI(1,("GetSrvInodeNum rc %d", rc1));
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/* BB EOPNOSUPP disable SERVER_INUM? */
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} else /* do we need cast or hash to ino? */
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(*pinode)->i_ino = inode_num;
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} /* else ino incremented to unique num in new_inode*/
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#endif /* CIFS_EXPERIMENTAL */
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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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cifsInfo->cifsAttrs = attr;
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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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/* blksize needs to be multiple of two. So safer to default to
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blksize and blkbits set in superblock so 2**blkbits and blksize
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will match rather than setting to:
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(pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
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/* Linux can not store file creation time unfortunately so we ignore it */
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inode->i_atime =
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cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime));
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inode->i_mtime =
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cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
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inode->i_ctime =
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cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
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cFYI(0, (" Attributes came in as 0x%x ", attr));
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/* set default mode. will override for dirs below */
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if (atomic_read(&cifsInfo->inUse) == 0)
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/* new inode, can safely set these fields */
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inode->i_mode = cifs_sb->mnt_file_mode;
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/* if (attr & ATTR_REPARSE) */
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/* We no longer handle these as symlinks because we could not
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follow them due to the absolute path with drive letter */
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if (attr & ATTR_DIRECTORY) {
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/* override default perms since we do not do byte range locking
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on dirs */
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inode->i_mode = cifs_sb->mnt_dir_mode;
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inode->i_mode |= S_IFDIR;
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} else {
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inode->i_mode |= S_IFREG;
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/* treat the dos attribute of read-only as read-only
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mode e.g. 555 */
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if (cifsInfo->cifsAttrs & ATTR_READONLY)
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inode->i_mode &= ~(S_IWUGO);
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/* BB add code here -
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validate if device or weird share or device type? */
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}
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if (is_size_safe_to_change(cifsInfo)) {
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/* can not safely change the file size here if the
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client is writing to it due to potential races */
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i_size_write(inode,le64_to_cpu(pfindData->EndOfFile));
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/* 512 bytes (2**9) is the fake blocksize that must be
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used for this calculation */
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inode->i_blocks = (512 - 1 + le64_to_cpu(
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pfindData->AllocationSize)) >> 9;
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}
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inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks);
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/* BB fill in uid and gid here? with help from winbind?
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or retrieve from NTFS stream extended attribute */
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if (atomic_read(&cifsInfo->inUse) == 0) {
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inode->i_uid = cifs_sb->mnt_uid;
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inode->i_gid = cifs_sb->mnt_gid;
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/* set so we do not keep refreshing these fields with
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bad data after user has changed them in memory */
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atomic_set(&cifsInfo->inUse,1);
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}
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if (S_ISREG(inode->i_mode)) {
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cFYI(1, (" File inode "));
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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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inode->i_fop = &cifs_file_direct_ops;
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else
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inode->i_fop = &cifs_file_ops;
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inode->i_data.a_ops = &cifs_addr_ops;
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} else if (S_ISDIR(inode->i_mode)) {
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cFYI(1, (" Directory inode "));
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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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} else if (S_ISLNK(inode->i_mode)) {
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cFYI(1, (" Symbolic Link inode "));
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inode->i_op = &cifs_symlink_inode_ops;
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} else {
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init_special_inode(inode, inode->i_mode,
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inode->i_rdev);
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}
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}
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kfree(buf);
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return rc;
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}
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/* gets root inode */
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void cifs_read_inode(struct inode *inode)
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{
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int xid;
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struct cifs_sb_info *cifs_sb;
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cifs_sb = CIFS_SB(inode->i_sb);
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xid = GetXid();
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if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
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cifs_get_inode_info_unix(&inode, "", inode->i_sb,xid);
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else
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cifs_get_inode_info(&inode, "", NULL, inode->i_sb,xid);
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/* can not call macro FreeXid here since in a void func */
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_FreeXid(xid);
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}
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int cifs_unlink(struct inode *inode, struct dentry *direntry)
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{
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int rc = 0;
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int xid;
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struct cifs_sb_info *cifs_sb;
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struct cifsTconInfo *pTcon;
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char *full_path = NULL;
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struct cifsInodeInfo *cifsInode;
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FILE_BASIC_INFO *pinfo_buf;
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cFYI(1, (" cifs_unlink, inode = 0x%p with ", inode));
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xid = GetXid();
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cifs_sb = CIFS_SB(inode->i_sb);
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pTcon = cifs_sb->tcon;
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/* Unlink can be called from rename so we can not grab the sem here
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since we deadlock otherwise */
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/* down(&direntry->d_sb->s_vfs_rename_sem);*/
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full_path = build_path_from_dentry(direntry);
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/* up(&direntry->d_sb->s_vfs_rename_sem);*/
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if (full_path == NULL) {
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FreeXid(xid);
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return -ENOMEM;
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}
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rc = CIFSSMBDelFile(xid, pTcon, full_path, cifs_sb->local_nls,
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cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
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if (!rc) {
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direntry->d_inode->i_nlink--;
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} else if (rc == -ENOENT) {
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d_drop(direntry);
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} else if (rc == -ETXTBSY) {
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int oplock = FALSE;
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__u16 netfid;
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rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, DELETE,
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CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE,
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&netfid, &oplock, NULL, 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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CIFSSMBRenameOpenFile(xid, pTcon, netfid, NULL,
|
|
cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
CIFSSMBClose(xid, pTcon, netfid);
|
|
direntry->d_inode->i_nlink--;
|
|
}
|
|
} else if (rc == -EACCES) {
|
|
/* try only if r/o attribute set in local lookup data? */
|
|
pinfo_buf = kmalloc(sizeof(FILE_BASIC_INFO), GFP_KERNEL);
|
|
if (pinfo_buf) {
|
|
memset(pinfo_buf, 0, sizeof(FILE_BASIC_INFO));
|
|
/* 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) {
|
|
direntry->d_inode->i_nlink--;
|
|
} 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);
|
|
direntry->d_inode->i_nlink--;
|
|
}
|
|
/* BB if rc = -ETXTBUSY goto the rename logic BB */
|
|
}
|
|
}
|
|
}
|
|
cifsInode = CIFS_I(direntry->d_inode);
|
|
cifsInode->time = 0; /* will force revalidate to get info when
|
|
needed */
|
|
direntry->d_inode->i_ctime = 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;
|
|
}
|
|
|
|
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;
|
|
|
|
down(&inode->i_sb->s_vfs_rename_sem);
|
|
full_path = build_path_from_dentry(direntry);
|
|
up(&inode->i_sb->s_vfs_rename_sem);
|
|
if (full_path == NULL) {
|
|
FreeXid(xid);
|
|
return -ENOMEM;
|
|
}
|
|
/* 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 {
|
|
inode->i_nlink++;
|
|
if (pTcon->ses->capabilities & CAP_UNIX)
|
|
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);
|
|
|
|
direntry->d_op = &cifs_dentry_ops;
|
|
d_instantiate(direntry, newinode);
|
|
if (direntry->d_inode)
|
|
direntry->d_inode->i_nlink = 2;
|
|
if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
|
|
if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
|
|
CIFSSMBUnixSetPerms(xid, pTcon, full_path,
|
|
mode,
|
|
(__u64)current->euid,
|
|
(__u64)current->egid,
|
|
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); */
|
|
}
|
|
}
|
|
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 with ", inode));
|
|
|
|
xid = GetXid();
|
|
|
|
cifs_sb = CIFS_SB(inode->i_sb);
|
|
pTcon = cifs_sb->tcon;
|
|
|
|
down(&inode->i_sb->s_vfs_rename_sem);
|
|
full_path = build_path_from_dentry(direntry);
|
|
up(&inode->i_sb->s_vfs_rename_sem);
|
|
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) {
|
|
inode->i_nlink--;
|
|
i_size_write(direntry->d_inode,0);
|
|
direntry->d_inode->i_nlink = 0;
|
|
}
|
|
|
|
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;
|
|
rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
|
|
info_buf_source, cifs_sb_source->local_nls,
|
|
cifs_sb_source->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
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) {
|
|
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;
|
|
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->ses->capabilities & CAP_UNIX) {
|
|
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);
|
|
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_sem may be taken by the kernel on lookup and rename
|
|
which could deadlock if we grab the i_sem here as well */
|
|
/* down(&direntry->d_inode->i_sem);*/
|
|
/* need to write out dirty pages here */
|
|
if (direntry->d_inode->i_mapping) {
|
|
/* do we need to lock inode until after invalidate completes
|
|
below? */
|
|
filemap_fdatawrite(direntry->d_inode->i_mapping);
|
|
}
|
|
if (invalidate_inode) {
|
|
if (direntry->d_inode->i_mapping)
|
|
filemap_fdatawait(direntry->d_inode->i_mapping);
|
|
/* may eventually have to do this for open files too */
|
|
if (list_empty(&(cifsInode->openFileList))) {
|
|
/* Has changed on server - flush read ahead pages */
|
|
cFYI(1, ("Invalidating read ahead data on "
|
|
"closed file"));
|
|
invalidate_remote_inode(direntry->d_inode);
|
|
}
|
|
}
|
|
/* up(&direntry->d_inode->i_sem); */
|
|
|
|
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);
|
|
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;
|
|
char *kaddr;
|
|
int rc = 0;
|
|
|
|
page = grab_cache_page(mapping, index);
|
|
if (!page)
|
|
return -ENOMEM;
|
|
|
|
kaddr = kmap_atomic(page, KM_USER0);
|
|
memset(kaddr + offset, 0, PAGE_CACHE_SIZE - offset);
|
|
flush_dcache_page(page);
|
|
kunmap_atomic(kaddr, KM_USER0);
|
|
unlock_page(page);
|
|
page_cache_release(page);
|
|
return rc;
|
|
}
|
|
|
|
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;
|
|
int found = FALSE;
|
|
struct cifsFileInfo *open_file = NULL;
|
|
FILE_BASIC_INFO time_buf;
|
|
int set_time = FALSE;
|
|
__u64 mode = 0xFFFFFFFFFFFFFFFFULL;
|
|
__u64 uid = 0xFFFFFFFFFFFFFFFFULL;
|
|
__u64 gid = 0xFFFFFFFFFFFFFFFFULL;
|
|
struct cifsInodeInfo *cifsInode;
|
|
struct list_head *tmp;
|
|
|
|
xid = GetXid();
|
|
|
|
cFYI(1, (" In cifs_setattr, name = %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;
|
|
|
|
down(&direntry->d_sb->s_vfs_rename_sem);
|
|
full_path = build_path_from_dentry(direntry);
|
|
up(&direntry->d_sb->s_vfs_rename_sem);
|
|
if (full_path == NULL) {
|
|
FreeXid(xid);
|
|
return -ENOMEM;
|
|
}
|
|
cifsInode = CIFS_I(direntry->d_inode);
|
|
|
|
/* BB check if we need to refresh inode from server now ? BB */
|
|
|
|
/* need to flush data before changing file size on server */
|
|
filemap_fdatawrite(direntry->d_inode->i_mapping);
|
|
filemap_fdatawait(direntry->d_inode->i_mapping);
|
|
|
|
if (attrs->ia_valid & ATTR_SIZE) {
|
|
read_lock(&GlobalSMBSeslock);
|
|
/* 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 */
|
|
list_for_each(tmp, &cifsInode->openFileList) {
|
|
open_file = list_entry(tmp, struct cifsFileInfo,
|
|
flist);
|
|
/* We check if file is open for writing first */
|
|
if ((open_file->pfile) &&
|
|
((open_file->pfile->f_flags & O_RDWR) ||
|
|
(open_file->pfile->f_flags & O_WRONLY))) {
|
|
if (open_file->invalidHandle == FALSE) {
|
|
/* we found a valid, writeable network
|
|
file handle to use to try to set the
|
|
file size */
|
|
__u16 nfid = open_file->netfid;
|
|
__u32 npid = open_file->pid;
|
|
read_unlock(&GlobalSMBSeslock);
|
|
found = TRUE;
|
|
rc = CIFSSMBSetFileSize(xid, pTcon,
|
|
attrs->ia_size, nfid, npid,
|
|
FALSE);
|
|
cFYI(1, ("SetFileSize by handle "
|
|
"(setattrs) rc = %d", rc));
|
|
/* Do not need reopen and retry on
|
|
EAGAIN since we will retry by
|
|
pathname below */
|
|
|
|
/* now that we found one valid file
|
|
handle no sense continuing to loop
|
|
trying others, so break here */
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (found == FALSE)
|
|
read_unlock(&GlobalSMBSeslock);
|
|
|
|
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));
|
|
}
|
|
|
|
/* 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 = vmtruncate(direntry->d_inode, attrs->ia_size);
|
|
cifs_truncate_page(direntry->d_inode->i_mapping,
|
|
direntry->d_inode->i_size);
|
|
}
|
|
}
|
|
if (attrs->ia_valid & ATTR_UID) {
|
|
cFYI(1, (" CIFS - UID changed to %d", attrs->ia_uid));
|
|
uid = attrs->ia_uid;
|
|
/* entry->uid = cpu_to_le16(attr->ia_uid); */
|
|
}
|
|
if (attrs->ia_valid & ATTR_GID) {
|
|
cFYI(1, (" CIFS - GID changed to %d", attrs->ia_gid));
|
|
gid = attrs->ia_gid;
|
|
/* entry->gid = cpu_to_le16(attr->ia_gid); */
|
|
}
|
|
|
|
time_buf.Attributes = 0;
|
|
if (attrs->ia_valid & ATTR_MODE) {
|
|
cFYI(1, (" CIFS - Mode changed to 0x%x", attrs->ia_mode));
|
|
mode = attrs->ia_mode;
|
|
/* entry->mode = cpu_to_le16(attr->ia_mode); */
|
|
}
|
|
|
|
if ((cifs_sb->tcon->ses->capabilities & CAP_UNIX)
|
|
&& (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) {
|
|
if ((mode & S_IWUGO) == 0) /* not writeable */ {
|
|
if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0)
|
|
time_buf.Attributes =
|
|
cpu_to_le32(cifsInode->cifsAttrs |
|
|
ATTR_READONLY);
|
|
} else if ((mode & S_IWUGO) == S_IWUGO) {
|
|
if (cifsInode->cifsAttrs & ATTR_READONLY)
|
|
time_buf.Attributes =
|
|
cpu_to_le32(cifsInode->cifsAttrs &
|
|
(~ATTR_READONLY));
|
|
}
|
|
/* BB to be implemented -
|
|
via Windows security descriptors or streams */
|
|
/* CIFSSMBWinSetPerms(xid, pTcon, full_path, mode, uid, gid,
|
|
cifs_sb->local_nls); */
|
|
}
|
|
|
|
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;
|
|
|
|
if (attrs->ia_valid & ATTR_CTIME) {
|
|
set_time = TRUE;
|
|
cFYI(1, (" CIFS - CTIME changed ")); /* BB probably no need */
|
|
time_buf.ChangeTime =
|
|
cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
|
|
} else
|
|
time_buf.ChangeTime = 0;
|
|
|
|
if (set_time || time_buf.Attributes) {
|
|
/* BB what if setting one attribute fails (such as size) but
|
|
time setting works? */
|
|
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); */
|
|
}
|
|
}
|
|
}
|
|
|
|
/* do not need local check to inode_check_ok since the server does
|
|
that */
|
|
if (!rc)
|
|
rc = inode_setattr(direntry->d_inode, attrs);
|
|
kfree(full_path);
|
|
FreeXid(xid);
|
|
return rc;
|
|
}
|
|
|
|
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 */
|
|
}
|