1656 lines
50 KiB
C
1656 lines
50 KiB
C
/*
|
|
* fs/cifs/inode.c
|
|
*
|
|
* Copyright (C) International Business Machines Corp., 2002,2007
|
|
* Author(s): Steve French (sfrench@us.ibm.com)
|
|
*
|
|
* This library is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU Lesser General Public License as published
|
|
* by the Free Software Foundation; either version 2.1 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
|
|
* the GNU Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public License
|
|
* along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
#include <linux/fs.h>
|
|
#include <linux/stat.h>
|
|
#include <linux/pagemap.h>
|
|
#include <asm/div64.h>
|
|
#include "cifsfs.h"
|
|
#include "cifspdu.h"
|
|
#include "cifsglob.h"
|
|
#include "cifsproto.h"
|
|
#include "cifs_debug.h"
|
|
#include "cifs_fs_sb.h"
|
|
|
|
int cifs_get_inode_info_unix(struct inode **pinode,
|
|
const unsigned char *search_path, struct super_block *sb, int xid)
|
|
{
|
|
int rc = 0;
|
|
FILE_UNIX_BASIC_INFO findData;
|
|
struct cifsTconInfo *pTcon;
|
|
struct inode *inode;
|
|
struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
|
|
char *tmp_path;
|
|
|
|
pTcon = cifs_sb->tcon;
|
|
cFYI(1, ("Getting info on %s", search_path));
|
|
/* could have done a find first instead but this returns more info */
|
|
rc = CIFSSMBUnixQPathInfo(xid, pTcon, search_path, &findData,
|
|
cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
/* dump_mem("\nUnixQPathInfo return data", &findData,
|
|
sizeof(findData)); */
|
|
if (rc) {
|
|
if (rc == -EREMOTE) {
|
|
tmp_path =
|
|
kmalloc(strnlen(pTcon->treeName,
|
|
MAX_TREE_SIZE + 1) +
|
|
strnlen(search_path, MAX_PATHCONF) + 1,
|
|
GFP_KERNEL);
|
|
if (tmp_path == NULL) {
|
|
return -ENOMEM;
|
|
}
|
|
/* have to skip first of the double backslash of
|
|
UNC name */
|
|
strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE);
|
|
strncat(tmp_path, search_path, MAX_PATHCONF);
|
|
rc = connect_to_dfs_path(xid, pTcon->ses,
|
|
/* treename + */ tmp_path,
|
|
cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
kfree(tmp_path);
|
|
|
|
/* BB fix up inode etc. */
|
|
} else if (rc) {
|
|
return rc;
|
|
}
|
|
} else {
|
|
struct cifsInodeInfo *cifsInfo;
|
|
__u32 type = le32_to_cpu(findData.Type);
|
|
__u64 num_of_bytes = le64_to_cpu(findData.NumOfBytes);
|
|
__u64 end_of_file = le64_to_cpu(findData.EndOfFile);
|
|
|
|
/* get new inode */
|
|
if (*pinode == NULL) {
|
|
*pinode = new_inode(sb);
|
|
if (*pinode == NULL)
|
|
return -ENOMEM;
|
|
/* 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) {
|
|
(*pinode)->i_ino =
|
|
(unsigned long)findData.UniqueId;
|
|
} /* note 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);
|
|
|
|
cFYI(1, ("Old time %ld", cifsInfo->time));
|
|
cifsInfo->time = jiffies;
|
|
cFYI(1, ("New time %ld", cifsInfo->time));
|
|
/* this is ok to set on every inode revalidate */
|
|
atomic_set(&cifsInfo->inUse,1);
|
|
|
|
inode->i_atime =
|
|
cifs_NTtimeToUnix(le64_to_cpu(findData.LastAccessTime));
|
|
inode->i_mtime =
|
|
cifs_NTtimeToUnix(le64_to_cpu
|
|
(findData.LastModificationTime));
|
|
inode->i_ctime =
|
|
cifs_NTtimeToUnix(le64_to_cpu(findData.LastStatusChange));
|
|
inode->i_mode = le64_to_cpu(findData.Permissions);
|
|
/* since we set the inode type below we need to mask off
|
|
to avoid strange results if bits set above */
|
|
inode->i_mode &= ~S_IFMT;
|
|
if (type == UNIX_FILE) {
|
|
inode->i_mode |= S_IFREG;
|
|
} else if (type == UNIX_SYMLINK) {
|
|
inode->i_mode |= S_IFLNK;
|
|
} else if (type == UNIX_DIR) {
|
|
inode->i_mode |= S_IFDIR;
|
|
} else if (type == UNIX_CHARDEV) {
|
|
inode->i_mode |= S_IFCHR;
|
|
inode->i_rdev = MKDEV(le64_to_cpu(findData.DevMajor),
|
|
le64_to_cpu(findData.DevMinor) & MINORMASK);
|
|
} else if (type == UNIX_BLOCKDEV) {
|
|
inode->i_mode |= S_IFBLK;
|
|
inode->i_rdev = MKDEV(le64_to_cpu(findData.DevMajor),
|
|
le64_to_cpu(findData.DevMinor) & MINORMASK);
|
|
} else if (type == UNIX_FIFO) {
|
|
inode->i_mode |= S_IFIFO;
|
|
} else if (type == UNIX_SOCKET) {
|
|
inode->i_mode |= S_IFSOCK;
|
|
} else {
|
|
/* safest to call it a file if we do not know */
|
|
inode->i_mode |= S_IFREG;
|
|
cFYI(1,("unknown type %d",type));
|
|
}
|
|
inode->i_uid = le64_to_cpu(findData.Uid);
|
|
inode->i_gid = le64_to_cpu(findData.Gid);
|
|
inode->i_nlink = le64_to_cpu(findData.Nlinks);
|
|
|
|
spin_lock(&inode->i_lock);
|
|
if (is_size_safe_to_change(cifsInfo, end_of_file)) {
|
|
/* can not safely change the file size here if the
|
|
client is writing to it due to potential races */
|
|
i_size_write(inode, end_of_file);
|
|
|
|
/* 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;*/
|
|
|
|
/* This seems incredibly stupid but it turns out that i_blocks
|
|
is not related to (i_size / i_blksize), instead 512 byte size
|
|
is required for calculating num blocks */
|
|
|
|
/* 512 bytes (2**9) is the fake blocksize that must be used */
|
|
/* for this calculation */
|
|
inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
|
|
}
|
|
spin_unlock(&inode->i_lock);
|
|
|
|
if (num_of_bytes < end_of_file)
|
|
cFYI(1, ("allocation size less than end of file"));
|
|
cFYI(1, ("Size %ld and blocks %llu",
|
|
(unsigned long) inode->i_size,
|
|
(unsigned long long)inode->i_blocks));
|
|
if (S_ISREG(inode->i_mode)) {
|
|
cFYI(1, ("File inode"));
|
|
inode->i_op = &cifs_file_inode_ops;
|
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
|
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
|
|
inode->i_fop =
|
|
&cifs_file_direct_nobrl_ops;
|
|
else
|
|
inode->i_fop = &cifs_file_direct_ops;
|
|
} else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
|
|
inode->i_fop = &cifs_file_nobrl_ops;
|
|
else /* not direct, send byte range locks */
|
|
inode->i_fop = &cifs_file_ops;
|
|
|
|
/* check if server can support readpages */
|
|
if(pTcon->ses->server->maxBuf <
|
|
PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)
|
|
inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
|
|
else
|
|
inode->i_data.a_ops = &cifs_addr_ops;
|
|
} else if (S_ISDIR(inode->i_mode)) {
|
|
cFYI(1, ("Directory inode"));
|
|
inode->i_op = &cifs_dir_inode_ops;
|
|
inode->i_fop = &cifs_dir_ops;
|
|
} else if (S_ISLNK(inode->i_mode)) {
|
|
cFYI(1, ("Symbolic Link inode"));
|
|
inode->i_op = &cifs_symlink_inode_ops;
|
|
/* tmp_inode->i_fop = */ /* do not need to set to anything */
|
|
} else {
|
|
cFYI(1, ("Init special inode"));
|
|
init_special_inode(inode, inode->i_mode,
|
|
inode->i_rdev);
|
|
}
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
static int decode_sfu_inode(struct inode * inode, __u64 size,
|
|
const unsigned char *path,
|
|
struct cifs_sb_info *cifs_sb, int xid)
|
|
{
|
|
int rc;
|
|
int oplock = FALSE;
|
|
__u16 netfid;
|
|
struct cifsTconInfo *pTcon = cifs_sb->tcon;
|
|
char buf[24];
|
|
unsigned int bytes_read;
|
|
char * pbuf;
|
|
|
|
pbuf = buf;
|
|
|
|
if(size == 0) {
|
|
inode->i_mode |= S_IFIFO;
|
|
return 0;
|
|
} else if (size < 8) {
|
|
return -EINVAL; /* EOPNOTSUPP? */
|
|
}
|
|
|
|
rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ,
|
|
CREATE_NOT_DIR, &netfid, &oplock, NULL,
|
|
cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
if (rc==0) {
|
|
int buf_type = CIFS_NO_BUFFER;
|
|
/* Read header */
|
|
rc = CIFSSMBRead(xid, pTcon,
|
|
netfid,
|
|
24 /* length */, 0 /* offset */,
|
|
&bytes_read, &pbuf, &buf_type);
|
|
if((rc == 0) && (bytes_read >= 8)) {
|
|
if(memcmp("IntxBLK", pbuf, 8) == 0) {
|
|
cFYI(1,("Block device"));
|
|
inode->i_mode |= S_IFBLK;
|
|
if(bytes_read == 24) {
|
|
/* we have enough to decode dev num */
|
|
__u64 mjr; /* major */
|
|
__u64 mnr; /* minor */
|
|
mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
|
|
mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
|
|
inode->i_rdev = MKDEV(mjr, mnr);
|
|
}
|
|
} else if(memcmp("IntxCHR", pbuf, 8) == 0) {
|
|
cFYI(1,("Char device"));
|
|
inode->i_mode |= S_IFCHR;
|
|
if(bytes_read == 24) {
|
|
/* we have enough to decode dev num */
|
|
__u64 mjr; /* major */
|
|
__u64 mnr; /* minor */
|
|
mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
|
|
mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
|
|
inode->i_rdev = MKDEV(mjr, mnr);
|
|
}
|
|
} else if(memcmp("IntxLNK", pbuf, 7) == 0) {
|
|
cFYI(1,("Symlink"));
|
|
inode->i_mode |= S_IFLNK;
|
|
} else {
|
|
inode->i_mode |= S_IFREG; /* file? */
|
|
rc = -EOPNOTSUPP;
|
|
}
|
|
} else {
|
|
inode->i_mode |= S_IFREG; /* then it is a file */
|
|
rc = -EOPNOTSUPP; /* or some unknown SFU type */
|
|
}
|
|
CIFSSMBClose(xid, pTcon, netfid);
|
|
}
|
|
return rc;
|
|
|
|
}
|
|
|
|
#define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */
|
|
|
|
static int get_sfu_uid_mode(struct inode * inode,
|
|
const unsigned char *path,
|
|
struct cifs_sb_info *cifs_sb, int xid)
|
|
{
|
|
#ifdef CONFIG_CIFS_XATTR
|
|
ssize_t rc;
|
|
char ea_value[4];
|
|
__u32 mode;
|
|
|
|
rc = CIFSSMBQueryEA(xid, cifs_sb->tcon, path, "SETFILEBITS",
|
|
ea_value, 4 /* size of buf */, cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
if(rc < 0)
|
|
return (int)rc;
|
|
else if (rc > 3) {
|
|
mode = le32_to_cpu(*((__le32 *)ea_value));
|
|
inode->i_mode &= ~SFBITS_MASK;
|
|
cFYI(1,("special bits 0%o org mode 0%o", mode, inode->i_mode));
|
|
inode->i_mode = (mode & SFBITS_MASK) | inode->i_mode;
|
|
cFYI(1,("special mode bits 0%o", mode));
|
|
return 0;
|
|
} else {
|
|
return 0;
|
|
}
|
|
#else
|
|
return -EOPNOTSUPP;
|
|
#endif
|
|
|
|
|
|
}
|
|
|
|
int cifs_get_inode_info(struct inode **pinode,
|
|
const unsigned char *search_path, FILE_ALL_INFO *pfindData,
|
|
struct super_block *sb, int xid)
|
|
{
|
|
int rc = 0;
|
|
struct cifsTconInfo *pTcon;
|
|
struct inode *inode;
|
|
struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
|
|
char *tmp_path;
|
|
char *buf = NULL;
|
|
int adjustTZ = FALSE;
|
|
|
|
pTcon = cifs_sb->tcon;
|
|
cFYI(1,("Getting info on %s", search_path));
|
|
|
|
if ((pfindData == NULL) && (*pinode != NULL)) {
|
|
if (CIFS_I(*pinode)->clientCanCacheRead) {
|
|
cFYI(1,("No need to revalidate cached inode sizes"));
|
|
return rc;
|
|
}
|
|
}
|
|
|
|
/* if file info not passed in then get it from server */
|
|
if (pfindData == NULL) {
|
|
buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
|
|
if (buf == NULL)
|
|
return -ENOMEM;
|
|
pfindData = (FILE_ALL_INFO *)buf;
|
|
/* could do find first instead but this returns more info */
|
|
rc = CIFSSMBQPathInfo(xid, pTcon, search_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, search_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) {
|
|
if (rc == -EREMOTE) {
|
|
tmp_path =
|
|
kmalloc(strnlen
|
|
(pTcon->treeName,
|
|
MAX_TREE_SIZE + 1) +
|
|
strnlen(search_path, MAX_PATHCONF) + 1,
|
|
GFP_KERNEL);
|
|
if (tmp_path == NULL) {
|
|
kfree(buf);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE);
|
|
strncat(tmp_path, search_path, MAX_PATHCONF);
|
|
rc = connect_to_dfs_path(xid, pTcon->ses,
|
|
/* treename + */ tmp_path,
|
|
cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
kfree(tmp_path);
|
|
/* BB fix up inode etc. */
|
|
} else if (rc) {
|
|
kfree(buf);
|
|
return rc;
|
|
}
|
|
} else {
|
|
struct cifsInodeInfo *cifsInfo;
|
|
__u32 attr = le32_to_cpu(pfindData->Attributes);
|
|
|
|
/* get new inode */
|
|
if (*pinode == NULL) {
|
|
*pinode = new_inode(sb);
|
|
if (*pinode == NULL) {
|
|
kfree(buf);
|
|
return -ENOMEM;
|
|
}
|
|
/* Is an i_ino of zero legal? Can we use that to check
|
|
if the server supports returning inode numbers? Are
|
|
there other sanity checks we can use to ensure that
|
|
the server is really filling in that field? */
|
|
|
|
/* We can not use the IndexNumber field by default from
|
|
Windows or Samba (in ALL_INFO buf) but we can request
|
|
it explicitly. It may not be unique presumably if
|
|
the server has multiple devices mounted under one
|
|
share */
|
|
|
|
/* There may be higher info levels that work but are
|
|
there Windows server or network appliances for which
|
|
IndexNumber field is not guaranteed unique? */
|
|
|
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM){
|
|
int rc1 = 0;
|
|
__u64 inode_num;
|
|
|
|
rc1 = CIFSGetSrvInodeNumber(xid, pTcon,
|
|
search_path, &inode_num,
|
|
cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
if (rc1) {
|
|
cFYI(1,("GetSrvInodeNum rc %d", rc1));
|
|
/* BB EOPNOSUPP disable SERVER_INUM? */
|
|
} else /* do we need cast or hash to ino? */
|
|
(*pinode)->i_ino = inode_num;
|
|
} /* else ino incremented to unique num in new_inode*/
|
|
if(sb->s_flags & MS_NOATIME)
|
|
(*pinode)->i_flags |= S_NOATIME | S_NOCMTIME;
|
|
insert_inode_hash(*pinode);
|
|
}
|
|
inode = *pinode;
|
|
cifsInfo = CIFS_I(inode);
|
|
cifsInfo->cifsAttrs = attr;
|
|
cFYI(1, ("Old time %ld", cifsInfo->time));
|
|
cifsInfo->time = jiffies;
|
|
cFYI(1, ("New time %ld", cifsInfo->time));
|
|
|
|
/* blksize needs to be multiple of two. So safer to default to
|
|
blksize and blkbits set in superblock so 2**blkbits and blksize
|
|
will match rather than setting to:
|
|
(pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
|
|
|
|
/* Linux can not store file creation time so ignore it */
|
|
if(pfindData->LastAccessTime)
|
|
inode->i_atime = cifs_NTtimeToUnix
|
|
(le64_to_cpu(pfindData->LastAccessTime));
|
|
else /* do not need to use current_fs_time - time not stored */
|
|
inode->i_atime = CURRENT_TIME;
|
|
inode->i_mtime =
|
|
cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
|
|
inode->i_ctime =
|
|
cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
|
|
cFYI(0, ("Attributes came in as 0x%x", attr));
|
|
if(adjustTZ && (pTcon->ses) && (pTcon->ses->server)) {
|
|
inode->i_ctime.tv_sec += pTcon->ses->server->timeAdj;
|
|
inode->i_mtime.tv_sec += pTcon->ses->server->timeAdj;
|
|
}
|
|
|
|
/* set default mode. will override for dirs below */
|
|
if (atomic_read(&cifsInfo->inUse) == 0)
|
|
/* new inode, can safely set these fields */
|
|
inode->i_mode = cifs_sb->mnt_file_mode;
|
|
else /* since we set the inode type below we need to mask off
|
|
to avoid strange results if type changes and both get orred in */
|
|
inode->i_mode &= ~S_IFMT;
|
|
/* if (attr & ATTR_REPARSE) */
|
|
/* We no longer handle these as symlinks because we could not
|
|
follow them due to the absolute path with drive letter */
|
|
if (attr & ATTR_DIRECTORY) {
|
|
/* override default perms since we do not do byte range locking
|
|
on dirs */
|
|
inode->i_mode = cifs_sb->mnt_dir_mode;
|
|
inode->i_mode |= S_IFDIR;
|
|
} else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
|
|
(cifsInfo->cifsAttrs & ATTR_SYSTEM) &&
|
|
/* No need to le64 convert size of zero */
|
|
(pfindData->EndOfFile == 0)) {
|
|
inode->i_mode = cifs_sb->mnt_file_mode;
|
|
inode->i_mode |= S_IFIFO;
|
|
/* BB Finish for SFU style symlinks and devices */
|
|
} else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
|
|
(cifsInfo->cifsAttrs & ATTR_SYSTEM)) {
|
|
if (decode_sfu_inode(inode,
|
|
le64_to_cpu(pfindData->EndOfFile),
|
|
search_path,
|
|
cifs_sb, xid)) {
|
|
cFYI(1,("Unrecognized sfu inode type"));
|
|
}
|
|
cFYI(1,("sfu mode 0%o",inode->i_mode));
|
|
} else {
|
|
inode->i_mode |= S_IFREG;
|
|
/* treat the dos attribute of read-only as read-only
|
|
mode e.g. 555 */
|
|
if (cifsInfo->cifsAttrs & ATTR_READONLY)
|
|
inode->i_mode &= ~(S_IWUGO);
|
|
else if ((inode->i_mode & S_IWUGO) == 0)
|
|
/* the ATTR_READONLY flag may have been */
|
|
/* changed on server -- set any w bits */
|
|
/* allowed by mnt_file_mode */
|
|
inode->i_mode |= (S_IWUGO &
|
|
cifs_sb->mnt_file_mode);
|
|
/* BB add code here -
|
|
validate if device or weird share or device type? */
|
|
}
|
|
|
|
spin_lock(&inode->i_lock);
|
|
if (is_size_safe_to_change(cifsInfo, le64_to_cpu(pfindData->EndOfFile))) {
|
|
/* can not safely shrink the file size here if the
|
|
client is writing to it due to potential races */
|
|
i_size_write(inode,le64_to_cpu(pfindData->EndOfFile));
|
|
|
|
/* 512 bytes (2**9) is the fake blocksize that must be
|
|
used for this calculation */
|
|
inode->i_blocks = (512 - 1 + le64_to_cpu(
|
|
pfindData->AllocationSize)) >> 9;
|
|
}
|
|
spin_unlock(&inode->i_lock);
|
|
|
|
inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks);
|
|
|
|
/* BB fill in uid and gid here? with help from winbind?
|
|
or retrieve from NTFS stream extended attribute */
|
|
if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
|
|
/* fill in uid, gid, mode from server ACL */
|
|
get_sfu_uid_mode(inode, search_path, cifs_sb, xid);
|
|
} else if (atomic_read(&cifsInfo->inUse) == 0) {
|
|
inode->i_uid = cifs_sb->mnt_uid;
|
|
inode->i_gid = cifs_sb->mnt_gid;
|
|
/* set so we do not keep refreshing these fields with
|
|
bad data after user has changed them in memory */
|
|
atomic_set(&cifsInfo->inUse,1);
|
|
}
|
|
|
|
if (S_ISREG(inode->i_mode)) {
|
|
cFYI(1, ("File inode"));
|
|
inode->i_op = &cifs_file_inode_ops;
|
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
|
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
|
|
inode->i_fop =
|
|
&cifs_file_direct_nobrl_ops;
|
|
else
|
|
inode->i_fop = &cifs_file_direct_ops;
|
|
} else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
|
|
inode->i_fop = &cifs_file_nobrl_ops;
|
|
else /* not direct, send byte range locks */
|
|
inode->i_fop = &cifs_file_ops;
|
|
|
|
if(pTcon->ses->server->maxBuf <
|
|
PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)
|
|
inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
|
|
else
|
|
inode->i_data.a_ops = &cifs_addr_ops;
|
|
} else if (S_ISDIR(inode->i_mode)) {
|
|
cFYI(1, ("Directory inode"));
|
|
inode->i_op = &cifs_dir_inode_ops;
|
|
inode->i_fop = &cifs_dir_ops;
|
|
} else if (S_ISLNK(inode->i_mode)) {
|
|
cFYI(1, ("Symbolic Link inode"));
|
|
inode->i_op = &cifs_symlink_inode_ops;
|
|
} else {
|
|
init_special_inode(inode, inode->i_mode,
|
|
inode->i_rdev);
|
|
}
|
|
}
|
|
kfree(buf);
|
|
return rc;
|
|
}
|
|
|
|
/* gets root inode */
|
|
void cifs_read_inode(struct inode *inode)
|
|
{
|
|
int xid;
|
|
struct cifs_sb_info *cifs_sb;
|
|
|
|
cifs_sb = CIFS_SB(inode->i_sb);
|
|
xid = GetXid();
|
|
if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
|
|
cifs_get_inode_info_unix(&inode, "", inode->i_sb,xid);
|
|
else
|
|
cifs_get_inode_info(&inode, "", NULL, inode->i_sb,xid);
|
|
/* can not call macro FreeXid here since in a void func */
|
|
_FreeXid(xid);
|
|
}
|
|
|
|
int cifs_unlink(struct inode *inode, struct dentry *direntry)
|
|
{
|
|
int rc = 0;
|
|
int xid;
|
|
struct cifs_sb_info *cifs_sb;
|
|
struct cifsTconInfo *pTcon;
|
|
char *full_path = NULL;
|
|
struct cifsInodeInfo *cifsInode;
|
|
FILE_BASIC_INFO *pinfo_buf;
|
|
|
|
cFYI(1, ("cifs_unlink, inode = 0x%p", inode));
|
|
|
|
xid = GetXid();
|
|
|
|
if(inode)
|
|
cifs_sb = CIFS_SB(inode->i_sb);
|
|
else
|
|
cifs_sb = CIFS_SB(direntry->d_sb);
|
|
pTcon = cifs_sb->tcon;
|
|
|
|
/* Unlink can be called from rename so we can not grab the sem here
|
|
since we deadlock otherwise */
|
|
/* mutex_lock(&direntry->d_sb->s_vfs_rename_mutex);*/
|
|
full_path = build_path_from_dentry(direntry);
|
|
/* mutex_unlock(&direntry->d_sb->s_vfs_rename_mutex);*/
|
|
if (full_path == NULL) {
|
|
FreeXid(xid);
|
|
return -ENOMEM;
|
|
}
|
|
rc = CIFSSMBDelFile(xid, pTcon, full_path, cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
|
|
if (!rc) {
|
|
if (direntry->d_inode)
|
|
drop_nlink(direntry->d_inode);
|
|
} else if (rc == -ENOENT) {
|
|
d_drop(direntry);
|
|
} else if (rc == -ETXTBSY) {
|
|
int oplock = FALSE;
|
|
__u16 netfid;
|
|
|
|
rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, DELETE,
|
|
CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE,
|
|
&netfid, &oplock, NULL, cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
if (rc==0) {
|
|
CIFSSMBRenameOpenFile(xid, pTcon, netfid, NULL,
|
|
cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
CIFSSMBClose(xid, pTcon, netfid);
|
|
if (direntry->d_inode)
|
|
drop_nlink(direntry->d_inode);
|
|
}
|
|
} else if (rc == -EACCES) {
|
|
/* try only if r/o attribute set in local lookup data? */
|
|
pinfo_buf = kzalloc(sizeof(FILE_BASIC_INFO), GFP_KERNEL);
|
|
if (pinfo_buf) {
|
|
/* ATTRS set to normal clears r/o bit */
|
|
pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL);
|
|
if (!(pTcon->ses->flags & CIFS_SES_NT4))
|
|
rc = CIFSSMBSetTimes(xid, pTcon, full_path,
|
|
pinfo_buf,
|
|
cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
else
|
|
rc = -EOPNOTSUPP;
|
|
|
|
if (rc == -EOPNOTSUPP) {
|
|
int oplock = FALSE;
|
|
__u16 netfid;
|
|
/* rc = CIFSSMBSetAttrLegacy(xid, pTcon,
|
|
full_path,
|
|
(__u16)ATTR_NORMAL,
|
|
cifs_sb->local_nls);
|
|
For some strange reason it seems that NT4 eats the
|
|
old setattr call without actually setting the
|
|
attributes so on to the third attempted workaround
|
|
*/
|
|
|
|
/* BB could scan to see if we already have it open
|
|
and pass in pid of opener to function */
|
|
rc = CIFSSMBOpen(xid, pTcon, full_path,
|
|
FILE_OPEN, SYNCHRONIZE |
|
|
FILE_WRITE_ATTRIBUTES, 0,
|
|
&netfid, &oplock, NULL,
|
|
cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
if (rc==0) {
|
|
rc = CIFSSMBSetFileTimes(xid, pTcon,
|
|
pinfo_buf,
|
|
netfid);
|
|
CIFSSMBClose(xid, pTcon, netfid);
|
|
}
|
|
}
|
|
kfree(pinfo_buf);
|
|
}
|
|
if (rc==0) {
|
|
rc = CIFSSMBDelFile(xid, pTcon, full_path,
|
|
cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
if (!rc) {
|
|
if (direntry->d_inode)
|
|
drop_nlink(direntry->d_inode);
|
|
} else if (rc == -ETXTBSY) {
|
|
int oplock = FALSE;
|
|
__u16 netfid;
|
|
|
|
rc = CIFSSMBOpen(xid, pTcon, full_path,
|
|
FILE_OPEN, DELETE,
|
|
CREATE_NOT_DIR |
|
|
CREATE_DELETE_ON_CLOSE,
|
|
&netfid, &oplock, NULL,
|
|
cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
if (rc==0) {
|
|
CIFSSMBRenameOpenFile(xid, pTcon,
|
|
netfid, NULL,
|
|
cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
CIFSSMBClose(xid, pTcon, netfid);
|
|
if (direntry->d_inode)
|
|
drop_nlink(direntry->d_inode);
|
|
}
|
|
/* BB if rc = -ETXTBUSY goto the rename logic BB */
|
|
}
|
|
}
|
|
}
|
|
if (direntry->d_inode) {
|
|
cifsInode = CIFS_I(direntry->d_inode);
|
|
cifsInode->time = 0; /* will force revalidate to get info
|
|
when needed */
|
|
direntry->d_inode->i_ctime = current_fs_time(inode->i_sb);
|
|
}
|
|
if(inode) {
|
|
inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb);
|
|
cifsInode = CIFS_I(inode);
|
|
cifsInode->time = 0; /* force revalidate of dir as well */
|
|
}
|
|
|
|
kfree(full_path);
|
|
FreeXid(xid);
|
|
return rc;
|
|
}
|
|
|
|
static void posix_fill_in_inode(struct inode *tmp_inode,
|
|
FILE_UNIX_BASIC_INFO *pData, int *pobject_type, int isNewInode)
|
|
{
|
|
loff_t local_size;
|
|
struct timespec local_mtime;
|
|
|
|
struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
|
|
struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb);
|
|
|
|
__u32 type = le32_to_cpu(pData->Type);
|
|
__u64 num_of_bytes = le64_to_cpu(pData->NumOfBytes);
|
|
__u64 end_of_file = le64_to_cpu(pData->EndOfFile);
|
|
cifsInfo->time = jiffies;
|
|
atomic_inc(&cifsInfo->inUse);
|
|
|
|
/* save mtime and size */
|
|
local_mtime = tmp_inode->i_mtime;
|
|
local_size = tmp_inode->i_size;
|
|
|
|
tmp_inode->i_atime =
|
|
cifs_NTtimeToUnix(le64_to_cpu(pData->LastAccessTime));
|
|
tmp_inode->i_mtime =
|
|
cifs_NTtimeToUnix(le64_to_cpu(pData->LastModificationTime));
|
|
tmp_inode->i_ctime =
|
|
cifs_NTtimeToUnix(le64_to_cpu(pData->LastStatusChange));
|
|
|
|
tmp_inode->i_mode = le64_to_cpu(pData->Permissions);
|
|
/* since we set the inode type below we need to mask off type
|
|
to avoid strange results if bits above were corrupt */
|
|
tmp_inode->i_mode &= ~S_IFMT;
|
|
if (type == UNIX_FILE) {
|
|
*pobject_type = DT_REG;
|
|
tmp_inode->i_mode |= S_IFREG;
|
|
} else if (type == UNIX_SYMLINK) {
|
|
*pobject_type = DT_LNK;
|
|
tmp_inode->i_mode |= S_IFLNK;
|
|
} else if (type == UNIX_DIR) {
|
|
*pobject_type = DT_DIR;
|
|
tmp_inode->i_mode |= S_IFDIR;
|
|
} else if (type == UNIX_CHARDEV) {
|
|
*pobject_type = DT_CHR;
|
|
tmp_inode->i_mode |= S_IFCHR;
|
|
tmp_inode->i_rdev = MKDEV(le64_to_cpu(pData->DevMajor),
|
|
le64_to_cpu(pData->DevMinor) & MINORMASK);
|
|
} else if (type == UNIX_BLOCKDEV) {
|
|
*pobject_type = DT_BLK;
|
|
tmp_inode->i_mode |= S_IFBLK;
|
|
tmp_inode->i_rdev = MKDEV(le64_to_cpu(pData->DevMajor),
|
|
le64_to_cpu(pData->DevMinor) & MINORMASK);
|
|
} else if (type == UNIX_FIFO) {
|
|
*pobject_type = DT_FIFO;
|
|
tmp_inode->i_mode |= S_IFIFO;
|
|
} else if (type == UNIX_SOCKET) {
|
|
*pobject_type = DT_SOCK;
|
|
tmp_inode->i_mode |= S_IFSOCK;
|
|
} else {
|
|
/* safest to just call it a file */
|
|
*pobject_type = DT_REG;
|
|
tmp_inode->i_mode |= S_IFREG;
|
|
cFYI(1,("unknown inode type %d",type));
|
|
}
|
|
|
|
#ifdef CONFIG_CIFS_DEBUG2
|
|
cFYI(1,("object type: %d", type));
|
|
#endif
|
|
tmp_inode->i_uid = le64_to_cpu(pData->Uid);
|
|
tmp_inode->i_gid = le64_to_cpu(pData->Gid);
|
|
tmp_inode->i_nlink = le64_to_cpu(pData->Nlinks);
|
|
|
|
spin_lock(&tmp_inode->i_lock);
|
|
if (is_size_safe_to_change(cifsInfo, end_of_file)) {
|
|
/* can not safely change the file size here if the
|
|
client is writing to it due to potential races */
|
|
i_size_write(tmp_inode, end_of_file);
|
|
|
|
/* 512 bytes (2**9) is the fake blocksize that must be used */
|
|
/* for this calculation, not the real blocksize */
|
|
tmp_inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
|
|
}
|
|
spin_unlock(&tmp_inode->i_lock);
|
|
|
|
if (S_ISREG(tmp_inode->i_mode)) {
|
|
cFYI(1, ("File inode"));
|
|
tmp_inode->i_op = &cifs_file_inode_ops;
|
|
|
|
if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
|
|
if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
|
|
tmp_inode->i_fop = &cifs_file_direct_nobrl_ops;
|
|
else
|
|
tmp_inode->i_fop = &cifs_file_direct_ops;
|
|
|
|
} else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
|
|
tmp_inode->i_fop = &cifs_file_nobrl_ops;
|
|
else
|
|
tmp_inode->i_fop = &cifs_file_ops;
|
|
|
|
if((cifs_sb->tcon) && (cifs_sb->tcon->ses) &&
|
|
(cifs_sb->tcon->ses->server->maxBuf <
|
|
PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE))
|
|
tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
|
|
else
|
|
tmp_inode->i_data.a_ops = &cifs_addr_ops;
|
|
|
|
if(isNewInode)
|
|
return; /* No sense invalidating pages for new inode since we
|
|
have not started caching readahead file data yet */
|
|
|
|
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);
|
|
}
|
|
} else if (S_ISDIR(tmp_inode->i_mode)) {
|
|
cFYI(1, ("Directory inode"));
|
|
tmp_inode->i_op = &cifs_dir_inode_ops;
|
|
tmp_inode->i_fop = &cifs_dir_ops;
|
|
} else if (S_ISLNK(tmp_inode->i_mode)) {
|
|
cFYI(1, ("Symbolic Link inode"));
|
|
tmp_inode->i_op = &cifs_symlink_inode_ops;
|
|
/* tmp_inode->i_fop = *//* do not need to set to anything */
|
|
} else {
|
|
cFYI(1, ("Special inode"));
|
|
init_special_inode(tmp_inode, tmp_inode->i_mode,
|
|
tmp_inode->i_rdev);
|
|
}
|
|
}
|
|
|
|
int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
|
|
{
|
|
int rc = 0;
|
|
int xid;
|
|
struct cifs_sb_info *cifs_sb;
|
|
struct cifsTconInfo *pTcon;
|
|
char *full_path = NULL;
|
|
struct inode *newinode = NULL;
|
|
|
|
cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode));
|
|
|
|
xid = GetXid();
|
|
|
|
cifs_sb = CIFS_SB(inode->i_sb);
|
|
pTcon = cifs_sb->tcon;
|
|
|
|
full_path = build_path_from_dentry(direntry);
|
|
if (full_path == NULL) {
|
|
FreeXid(xid);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
if((pTcon->ses->capabilities & CAP_UNIX) &&
|
|
(CIFS_UNIX_POSIX_PATH_OPS_CAP &
|
|
le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
|
|
u32 oplock = 0;
|
|
FILE_UNIX_BASIC_INFO * pInfo =
|
|
kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
|
|
if(pInfo == NULL) {
|
|
rc = -ENOMEM;
|
|
goto mkdir_out;
|
|
}
|
|
|
|
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) {
|
|
cFYI(1, ("posix mkdir returned 0x%x", rc));
|
|
d_drop(direntry);
|
|
} else {
|
|
int obj_type;
|
|
if (pInfo->Type == -1) /* no return info - go query */
|
|
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)
|
|
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, &obj_type, 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;
|
|
}
|
|
|
|
/* 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->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);
|
|
|
|
if (pTcon->nocase)
|
|
direntry->d_op = &cifs_ci_dentry_ops;
|
|
else
|
|
direntry->d_op = &cifs_dentry_ops;
|
|
d_instantiate(direntry, newinode);
|
|
/* setting nlink not necessary except in cases where we
|
|
* failed to get it from the server or was set bogus */
|
|
if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2))
|
|
direntry->d_inode->i_nlink = 2;
|
|
if (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->fsuid,
|
|
(__u64)current->fsgid,
|
|
0 /* dev_t */,
|
|
cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
} else {
|
|
CIFSSMBUnixSetPerms(xid, pTcon, full_path,
|
|
mode, (__u64)-1,
|
|
(__u64)-1, 0 /* dev_t */,
|
|
cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
}
|
|
else {
|
|
/* BB to be implemented via Windows secrty descriptors
|
|
eg CIFSSMBWinSetPerms(xid, pTcon, full_path, mode,
|
|
-1, -1, local_nls); */
|
|
if(direntry->d_inode) {
|
|
direntry->d_inode->i_mode = mode;
|
|
direntry->d_inode->i_mode |= S_IFDIR;
|
|
if(cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_SET_UID) {
|
|
direntry->d_inode->i_uid =
|
|
current->fsuid;
|
|
direntry->d_inode->i_gid =
|
|
current->fsgid;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
mkdir_out:
|
|
kfree(full_path);
|
|
FreeXid(xid);
|
|
return rc;
|
|
}
|
|
|
|
int cifs_rmdir(struct inode *inode, struct dentry *direntry)
|
|
{
|
|
int rc = 0;
|
|
int xid;
|
|
struct cifs_sb_info *cifs_sb;
|
|
struct cifsTconInfo *pTcon;
|
|
char *full_path = NULL;
|
|
struct cifsInodeInfo *cifsInode;
|
|
|
|
cFYI(1, ("cifs_rmdir, inode = 0x%p", inode));
|
|
|
|
xid = GetXid();
|
|
|
|
cifs_sb = CIFS_SB(inode->i_sb);
|
|
pTcon = cifs_sb->tcon;
|
|
|
|
full_path = build_path_from_dentry(direntry);
|
|
if (full_path == NULL) {
|
|
FreeXid(xid);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
|
|
if (!rc) {
|
|
drop_nlink(inode);
|
|
spin_lock(&direntry->d_inode->i_lock);
|
|
i_size_write(direntry->d_inode,0);
|
|
clear_nlink(direntry->d_inode);
|
|
spin_unlock(&direntry->d_inode->i_lock);
|
|
}
|
|
|
|
cifsInode = CIFS_I(direntry->d_inode);
|
|
cifsInode->time = 0; /* force revalidate to go get info when
|
|
needed */
|
|
direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
|
|
current_fs_time(inode->i_sb);
|
|
|
|
kfree(full_path);
|
|
FreeXid(xid);
|
|
return rc;
|
|
}
|
|
|
|
int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
|
|
struct inode *target_inode, struct dentry *target_direntry)
|
|
{
|
|
char *fromName;
|
|
char *toName;
|
|
struct cifs_sb_info *cifs_sb_source;
|
|
struct cifs_sb_info *cifs_sb_target;
|
|
struct cifsTconInfo *pTcon;
|
|
int xid;
|
|
int rc = 0;
|
|
|
|
xid = GetXid();
|
|
|
|
cifs_sb_target = CIFS_SB(target_inode->i_sb);
|
|
cifs_sb_source = CIFS_SB(source_inode->i_sb);
|
|
pTcon = cifs_sb_source->tcon;
|
|
|
|
if (pTcon != cifs_sb_target->tcon) {
|
|
FreeXid(xid);
|
|
return -EXDEV; /* BB actually could be allowed if same server,
|
|
but different share.
|
|
Might eventually add support for this */
|
|
}
|
|
|
|
/* we already have the rename sem so we do not need to grab it again
|
|
here to protect the path integrity */
|
|
fromName = build_path_from_dentry(source_direntry);
|
|
toName = build_path_from_dentry(target_direntry);
|
|
if ((fromName == NULL) || (toName == NULL)) {
|
|
rc = -ENOMEM;
|
|
goto cifs_rename_exit;
|
|
}
|
|
|
|
rc = CIFSSMBRename(xid, pTcon, fromName, toName,
|
|
cifs_sb_source->local_nls,
|
|
cifs_sb_source->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
if (rc == -EEXIST) {
|
|
/* check if they are the same file because rename of hardlinked
|
|
files is a noop */
|
|
FILE_UNIX_BASIC_INFO *info_buf_source;
|
|
FILE_UNIX_BASIC_INFO *info_buf_target;
|
|
|
|
info_buf_source =
|
|
kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
|
|
if (info_buf_source != NULL) {
|
|
info_buf_target = info_buf_source + 1;
|
|
if (pTcon->ses->capabilities & CAP_UNIX)
|
|
rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
|
|
info_buf_source,
|
|
cifs_sb_source->local_nls,
|
|
cifs_sb_source->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
/* else rc is still EEXIST so will fall through to
|
|
unlink the target and retry rename */
|
|
if (rc == 0) {
|
|
rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
|
|
info_buf_target,
|
|
cifs_sb_target->local_nls,
|
|
/* remap based on source sb */
|
|
cifs_sb_source->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
}
|
|
if ((rc == 0) &&
|
|
(info_buf_source->UniqueId ==
|
|
info_buf_target->UniqueId)) {
|
|
/* do not rename since the files are hardlinked which
|
|
is a noop */
|
|
} else {
|
|
/* we either can not tell the files are hardlinked
|
|
(as with Windows servers) or files are not
|
|
hardlinked so delete the target manually before
|
|
renaming to follow POSIX rather than Windows
|
|
semantics */
|
|
cifs_unlink(target_inode, target_direntry);
|
|
rc = CIFSSMBRename(xid, pTcon, fromName,
|
|
toName,
|
|
cifs_sb_source->local_nls,
|
|
cifs_sb_source->mnt_cifs_flags
|
|
& CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
}
|
|
kfree(info_buf_source);
|
|
} /* if we can not get memory just leave rc as EEXIST */
|
|
}
|
|
|
|
if (rc) {
|
|
cFYI(1, ("rename rc %d", rc));
|
|
}
|
|
|
|
if ((rc == -EIO) || (rc == -EEXIST)) {
|
|
int oplock = FALSE;
|
|
__u16 netfid;
|
|
|
|
/* BB FIXME Is Generic Read correct for rename? */
|
|
/* if renaming directory - we should not say CREATE_NOT_DIR,
|
|
need to test renaming open directory, also GENERIC_READ
|
|
might not right be right access to request */
|
|
rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
|
|
CREATE_NOT_DIR, &netfid, &oplock, NULL,
|
|
cifs_sb_source->local_nls,
|
|
cifs_sb_source->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
if (rc==0) {
|
|
rc = CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
|
|
cifs_sb_source->local_nls,
|
|
cifs_sb_source->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
CIFSSMBClose(xid, pTcon, netfid);
|
|
}
|
|
}
|
|
|
|
cifs_rename_exit:
|
|
kfree(fromName);
|
|
kfree(toName);
|
|
FreeXid(xid);
|
|
return rc;
|
|
}
|
|
|
|
int cifs_revalidate(struct dentry *direntry)
|
|
{
|
|
int xid;
|
|
int rc = 0;
|
|
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_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? */
|
|
filemap_fdatawrite(direntry->d_inode->i_mapping);
|
|
}
|
|
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)
|
|
filemap_fdatawait(direntry->d_inode->i_mapping);
|
|
/* 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;
|
|
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;
|
|
}
|
|
|
|
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(mapping, offset + PAGE_SIZE - 1, 0, 1);
|
|
truncate_inode_pages(mapping, offset);
|
|
goto out_truncate;
|
|
|
|
do_expand:
|
|
limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
|
|
if (limit != RLIM_INFINITY && offset > limit) {
|
|
spin_unlock(&inode->i_lock);
|
|
goto out_sig;
|
|
}
|
|
if (offset > inode->i_sb->s_maxbytes) {
|
|
spin_unlock(&inode->i_lock);
|
|
goto out_big;
|
|
}
|
|
i_size_write(inode, offset);
|
|
spin_unlock(&inode->i_lock);
|
|
out_truncate:
|
|
if (inode->i_op && inode->i_op->truncate)
|
|
inode->i_op->truncate(inode);
|
|
return 0;
|
|
out_sig:
|
|
send_sig(SIGXFSZ, current, 0);
|
|
out_big:
|
|
return -EFBIG;
|
|
out_busy:
|
|
return -ETXTBSY;
|
|
}
|
|
|
|
int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
|
|
{
|
|
int xid;
|
|
struct cifs_sb_info *cifs_sb;
|
|
struct cifsTconInfo *pTcon;
|
|
char *full_path = NULL;
|
|
int rc = -EACCES;
|
|
struct cifsFileInfo *open_file = NULL;
|
|
FILE_BASIC_INFO time_buf;
|
|
int set_time = FALSE;
|
|
int set_dosattr = FALSE;
|
|
__u64 mode = 0xFFFFFFFFFFFFFFFFULL;
|
|
__u64 uid = 0xFFFFFFFFFFFFFFFFULL;
|
|
__u64 gid = 0xFFFFFFFFFFFFFFFFULL;
|
|
struct cifsInodeInfo *cifsInode;
|
|
|
|
xid = GetXid();
|
|
|
|
cFYI(1, ("setattr on file %s attrs->iavalid 0x%x",
|
|
direntry->d_name.name, attrs->ia_valid));
|
|
|
|
cifs_sb = CIFS_SB(direntry->d_inode->i_sb);
|
|
pTcon = cifs_sb->tcon;
|
|
|
|
if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
|
|
/* check if we have permission to change attrs */
|
|
rc = inode_change_ok(direntry->d_inode, attrs);
|
|
if(rc < 0) {
|
|
FreeXid(xid);
|
|
return rc;
|
|
} else
|
|
rc = 0;
|
|
}
|
|
|
|
full_path = build_path_from_dentry(direntry);
|
|
if (full_path == NULL) {
|
|
FreeXid(xid);
|
|
return -ENOMEM;
|
|
}
|
|
cifsInode = CIFS_I(direntry->d_inode);
|
|
|
|
/* BB check if we need to refresh inode from server now ? BB */
|
|
|
|
/* need to flush data before changing file size on server */
|
|
filemap_write_and_wait(direntry->d_inode->i_mapping);
|
|
|
|
if (attrs->ia_valid & ATTR_SIZE) {
|
|
/* To avoid spurious oplock breaks from server, in the case of
|
|
inodes that we already have open, avoid doing path based
|
|
setting of file size if we can do it by handle.
|
|
This keeps our caching token (oplock) and avoids timeouts
|
|
when the local oplock break takes longer to flush
|
|
writebehind data than the SMB timeout for the SetPathInfo
|
|
request would allow */
|
|
|
|
open_file = find_writable_file(cifsInode);
|
|
if (open_file) {
|
|
__u16 nfid = open_file->netfid;
|
|
__u32 npid = open_file->pid;
|
|
rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size,
|
|
nfid, npid, FALSE);
|
|
atomic_dec(&open_file->wrtPending);
|
|
cFYI(1,("SetFSize for attrs rc = %d", rc));
|
|
if((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
|
|
int bytes_written;
|
|
rc = CIFSSMBWrite(xid, pTcon,
|
|
nfid, 0, attrs->ia_size,
|
|
&bytes_written, NULL, NULL,
|
|
1 /* 45 seconds */);
|
|
cFYI(1,("Wrt seteof rc %d", rc));
|
|
}
|
|
} else
|
|
rc = -EINVAL;
|
|
|
|
if (rc != 0) {
|
|
/* Set file size by pathname rather than by handle
|
|
either because no valid, writeable file handle for
|
|
it was found or because there was an error setting
|
|
it by handle */
|
|
rc = CIFSSMBSetEOF(xid, pTcon, full_path,
|
|
attrs->ia_size, FALSE,
|
|
cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
|
|
if((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
|
|
__u16 netfid;
|
|
int oplock = FALSE;
|
|
|
|
rc = SMBLegacyOpen(xid, pTcon, full_path,
|
|
FILE_OPEN,
|
|
SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
|
|
CREATE_NOT_DIR, &netfid, &oplock,
|
|
NULL, cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
if (rc==0) {
|
|
int bytes_written;
|
|
rc = CIFSSMBWrite(xid, pTcon,
|
|
netfid, 0,
|
|
attrs->ia_size,
|
|
&bytes_written, NULL,
|
|
NULL, 1 /* 45 sec */);
|
|
cFYI(1,("wrt seteof rc %d",rc));
|
|
CIFSSMBClose(xid, pTcon, netfid);
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
/* Server is ok setting allocation size implicitly - no need
|
|
to call:
|
|
CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, TRUE,
|
|
cifs_sb->local_nls);
|
|
*/
|
|
|
|
if (rc == 0) {
|
|
rc = cifs_vmtruncate(direntry->d_inode, attrs->ia_size);
|
|
cifs_truncate_page(direntry->d_inode->i_mapping,
|
|
direntry->d_inode->i_size);
|
|
} else
|
|
goto cifs_setattr_exit;
|
|
}
|
|
if (attrs->ia_valid & ATTR_UID) {
|
|
cFYI(1, ("UID changed to %d", attrs->ia_uid));
|
|
uid = attrs->ia_uid;
|
|
}
|
|
if (attrs->ia_valid & ATTR_GID) {
|
|
cFYI(1, ("GID changed to %d", attrs->ia_gid));
|
|
gid = attrs->ia_gid;
|
|
}
|
|
|
|
time_buf.Attributes = 0;
|
|
if (attrs->ia_valid & ATTR_MODE) {
|
|
cFYI(1, ("Mode changed to 0x%x", attrs->ia_mode));
|
|
mode = attrs->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) {
|
|
rc = 0;
|
|
if ((mode & S_IWUGO) == 0) /* not writeable */ {
|
|
if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
|
|
set_dosattr = TRUE;
|
|
time_buf.Attributes =
|
|
cpu_to_le32(cifsInode->cifsAttrs |
|
|
ATTR_READONLY);
|
|
}
|
|
} else if (cifsInode->cifsAttrs & ATTR_READONLY) {
|
|
/* If file is readonly on server, we would
|
|
not be able to write to it - so if any write
|
|
bit is enabled for user or group or other we
|
|
need to at least try to remove r/o dos attr */
|
|
set_dosattr = TRUE;
|
|
time_buf.Attributes = cpu_to_le32(cifsInode->cifsAttrs &
|
|
(~ATTR_READONLY));
|
|
/* Windows ignores set to zero */
|
|
if(time_buf.Attributes == 0)
|
|
time_buf.Attributes |= cpu_to_le32(ATTR_NORMAL);
|
|
}
|
|
/* 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;
|
|
/* Do not set ctime explicitly unless other time
|
|
stamps are changed explicitly (i.e. by utime()
|
|
since we would then have a mix of client and
|
|
server times */
|
|
|
|
if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
|
|
set_time = TRUE;
|
|
/* Although Samba throws this field away
|
|
it may be useful to Windows - but we do
|
|
not want to set ctime unless some other
|
|
timestamp is changing */
|
|
cFYI(1, ("CIFS - CTIME changed"));
|
|
time_buf.ChangeTime =
|
|
cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
|
|
} else
|
|
time_buf.ChangeTime = 0;
|
|
|
|
if (set_time || set_dosattr) {
|
|
time_buf.CreationTime = 0; /* do not change */
|
|
/* In the future we should experiment - try setting timestamps
|
|
via Handle (SetFileInfo) instead of by path */
|
|
if (!(pTcon->ses->flags & CIFS_SES_NT4))
|
|
rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf,
|
|
cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
else
|
|
rc = -EOPNOTSUPP;
|
|
|
|
if (rc == -EOPNOTSUPP) {
|
|
int oplock = FALSE;
|
|
__u16 netfid;
|
|
|
|
cFYI(1, ("calling SetFileInfo since SetPathInfo for "
|
|
"times not supported by this server"));
|
|
/* BB we could scan to see if we already have it open
|
|
and pass in pid of opener to function */
|
|
rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
|
|
SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
|
|
CREATE_NOT_DIR, &netfid, &oplock,
|
|
NULL, cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
if (rc==0) {
|
|
rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf,
|
|
netfid);
|
|
CIFSSMBClose(xid, pTcon, netfid);
|
|
} else {
|
|
/* BB For even older servers we could convert time_buf
|
|
into old DOS style which uses two second
|
|
granularity */
|
|
|
|
/* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path,
|
|
&time_buf, cifs_sb->local_nls); */
|
|
}
|
|
}
|
|
/* Even if error on time set, no sense failing the call if
|
|
the server would set the time to a reasonable value anyway,
|
|
and this check ensures that we are not being called from
|
|
sys_utimes in which case we ought to fail the call back to
|
|
the user when the server rejects the call */
|
|
if((rc) && (attrs->ia_valid &
|
|
(ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
|
|
rc = 0;
|
|
}
|
|
|
|
/* do not need local check to inode_check_ok since the server does
|
|
that */
|
|
if (!rc)
|
|
rc = inode_setattr(direntry->d_inode, attrs);
|
|
cifs_setattr_exit:
|
|
kfree(full_path);
|
|
FreeXid(xid);
|
|
return rc;
|
|
}
|
|
|
|
#if 0
|
|
void cifs_delete_inode(struct inode *inode)
|
|
{
|
|
cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode));
|
|
/* may have to add back in if and when safe distributed caching of
|
|
directories added e.g. via FindNotify */
|
|
}
|
|
#endif
|