forked from rrcarlosr/Jetpack
294 lines
8.2 KiB
C
294 lines
8.2 KiB
C
|
/*
|
||
|
|
* fs/cifs/ioctl.c
|
||
|
|
*
|
||
|
|
* vfs operations that deal with io control
|
||
|
|
*
|
||
|
|
* Copyright (C) International Business Machines Corp., 2005,2013
|
||
|
|
* 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/file.h>
|
||
|
|
#include <linux/mount.h>
|
||
|
|
#include <linux/mm.h>
|
||
|
|
#include <linux/pagemap.h>
|
||
|
|
#include "cifspdu.h"
|
||
|
|
#include "cifsglob.h"
|
||
|
|
#include "cifsproto.h"
|
||
|
|
#include "cifs_debug.h"
|
||
|
|
#include "cifsfs.h"
|
||
|
|
#include "cifs_ioctl.h"
|
||
|
|
#include <linux/btrfs.h>
|
||
|
|
|
||
|
|
static int cifs_file_clone_range(unsigned int xid, struct file *src_file,
|
||
|
|
struct file *dst_file)
|
||
|
|
{
|
||
|
|
struct inode *src_inode = file_inode(src_file);
|
||
|
|
struct inode *target_inode = file_inode(dst_file);
|
||
|
|
struct cifsFileInfo *smb_file_src;
|
||
|
|
struct cifsFileInfo *smb_file_target;
|
||
|
|
struct cifs_tcon *src_tcon;
|
||
|
|
struct cifs_tcon *target_tcon;
|
||
|
|
int rc;
|
||
|
|
|
||
|
|
cifs_dbg(FYI, "ioctl clone range\n");
|
||
|
|
|
||
|
|
if (!src_file->private_data || !dst_file->private_data) {
|
||
|
|
rc = -EBADF;
|
||
|
|
cifs_dbg(VFS, "missing cifsFileInfo on copy range src file\n");
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
|
||
|
|
rc = -EXDEV;
|
||
|
|
smb_file_target = dst_file->private_data;
|
||
|
|
smb_file_src = src_file->private_data;
|
||
|
|
src_tcon = tlink_tcon(smb_file_src->tlink);
|
||
|
|
target_tcon = tlink_tcon(smb_file_target->tlink);
|
||
|
|
|
||
|
|
if (src_tcon->ses != target_tcon->ses) {
|
||
|
|
cifs_dbg(VFS, "source and target of copy not on same server\n");
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Note: cifs case is easier than btrfs since server responsible for
|
||
|
|
* checks for proper open modes and file type and if it wants
|
||
|
|
* server could even support copy of range where source = target
|
||
|
|
*/
|
||
|
|
lock_two_nondirectories(target_inode, src_inode);
|
||
|
|
|
||
|
|
cifs_dbg(FYI, "about to flush pages\n");
|
||
|
|
/* should we flush first and last page first */
|
||
|
|
truncate_inode_pages(&target_inode->i_data, 0);
|
||
|
|
|
||
|
|
if (target_tcon->ses->server->ops->clone_range)
|
||
|
|
rc = target_tcon->ses->server->ops->clone_range(xid,
|
||
|
|
smb_file_src, smb_file_target, 0, src_inode->i_size, 0);
|
||
|
|
else
|
||
|
|
rc = -EOPNOTSUPP;
|
||
|
|
|
||
|
|
/* force revalidate of size and timestamps of target file now
|
||
|
|
that target is updated on the server */
|
||
|
|
CIFS_I(target_inode)->time = 0;
|
||
|
|
/* although unlocking in the reverse order from locking is not
|
||
|
|
strictly necessary here it is a little cleaner to be consistent */
|
||
|
|
unlock_two_nondirectories(src_inode, target_inode);
|
||
|
|
out:
|
||
|
|
return rc;
|
||
|
|
}
|
||
|
|
|
||
|
|
static long cifs_ioctl_clone(unsigned int xid, struct file *dst_file,
|
||
|
|
unsigned long srcfd)
|
||
|
|
{
|
||
|
|
int rc;
|
||
|
|
struct fd src_file;
|
||
|
|
struct inode *src_inode;
|
||
|
|
|
||
|
|
cifs_dbg(FYI, "ioctl clone range\n");
|
||
|
|
/* the destination must be opened for writing */
|
||
|
|
if (!(dst_file->f_mode & FMODE_WRITE)) {
|
||
|
|
cifs_dbg(FYI, "file target not open for write\n");
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* check if target volume is readonly and take reference */
|
||
|
|
rc = mnt_want_write_file(dst_file);
|
||
|
|
if (rc) {
|
||
|
|
cifs_dbg(FYI, "mnt_want_write failed with rc %d\n", rc);
|
||
|
|
return rc;
|
||
|
|
}
|
||
|
|
|
||
|
|
src_file = fdget(srcfd);
|
||
|
|
if (!src_file.file) {
|
||
|
|
rc = -EBADF;
|
||
|
|
goto out_drop_write;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (src_file.file->f_op->unlocked_ioctl != cifs_ioctl) {
|
||
|
|
rc = -EBADF;
|
||
|
|
cifs_dbg(VFS, "src file seems to be from a different filesystem type\n");
|
||
|
|
goto out_fput;
|
||
|
|
}
|
||
|
|
|
||
|
|
src_inode = file_inode(src_file.file);
|
||
|
|
rc = -EINVAL;
|
||
|
|
if (S_ISDIR(src_inode->i_mode))
|
||
|
|
goto out_fput;
|
||
|
|
|
||
|
|
rc = cifs_file_clone_range(xid, src_file.file, dst_file);
|
||
|
|
|
||
|
|
out_fput:
|
||
|
|
fdput(src_file);
|
||
|
|
out_drop_write:
|
||
|
|
mnt_drop_write_file(dst_file);
|
||
|
|
return rc;
|
||
|
|
}
|
||
|
|
|
||
|
|
static long smb_mnt_get_fsinfo(unsigned int xid, struct cifs_tcon *tcon,
|
||
|
|
void __user *arg)
|
||
|
|
{
|
||
|
|
int rc = 0;
|
||
|
|
struct smb_mnt_fs_info *fsinf;
|
||
|
|
|
||
|
|
fsinf = kzalloc(sizeof(struct smb_mnt_fs_info), GFP_KERNEL);
|
||
|
|
if (fsinf == NULL)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
fsinf->version = 1;
|
||
|
|
fsinf->protocol_id = tcon->ses->server->vals->protocol_id;
|
||
|
|
fsinf->device_characteristics =
|
||
|
|
le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics);
|
||
|
|
fsinf->device_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
|
||
|
|
fsinf->fs_attributes = le32_to_cpu(tcon->fsAttrInfo.Attributes);
|
||
|
|
fsinf->max_path_component =
|
||
|
|
le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength);
|
||
|
|
#ifdef CONFIG_CIFS_SMB2
|
||
|
|
fsinf->vol_serial_number = tcon->vol_serial_number;
|
||
|
|
fsinf->vol_create_time = le64_to_cpu(tcon->vol_create_time);
|
||
|
|
fsinf->share_flags = tcon->share_flags;
|
||
|
|
fsinf->share_caps = le32_to_cpu(tcon->capabilities);
|
||
|
|
fsinf->sector_flags = tcon->ss_flags;
|
||
|
|
fsinf->optimal_sector_size = tcon->perf_sector_size;
|
||
|
|
fsinf->max_bytes_chunk = tcon->max_bytes_chunk;
|
||
|
|
fsinf->maximal_access = tcon->maximal_access;
|
||
|
|
#endif /* SMB2 */
|
||
|
|
fsinf->cifs_posix_caps = le64_to_cpu(tcon->fsUnixInfo.Capability);
|
||
|
|
|
||
|
|
if (copy_to_user(arg, fsinf, sizeof(struct smb_mnt_fs_info)))
|
||
|
|
rc = -EFAULT;
|
||
|
|
|
||
|
|
kfree(fsinf);
|
||
|
|
return rc;
|
||
|
|
}
|
||
|
|
|
||
|
|
long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg)
|
||
|
|
{
|
||
|
|
struct inode *inode = file_inode(filep);
|
||
|
|
int rc = -ENOTTY; /* strange error - but the precedent */
|
||
|
|
unsigned int xid;
|
||
|
|
struct cifs_sb_info *cifs_sb;
|
||
|
|
struct cifsFileInfo *pSMBFile = filep->private_data;
|
||
|
|
struct cifs_tcon *tcon;
|
||
|
|
__u64 ExtAttrBits = 0;
|
||
|
|
__u64 caps;
|
||
|
|
|
||
|
|
xid = get_xid();
|
||
|
|
|
||
|
|
cifs_sb = CIFS_SB(inode->i_sb);
|
||
|
|
cifs_dbg(FYI, "cifs ioctl 0x%x\n", command);
|
||
|
|
switch (command) {
|
||
|
|
case FS_IOC_GETFLAGS:
|
||
|
|
if (pSMBFile == NULL)
|
||
|
|
break;
|
||
|
|
tcon = tlink_tcon(pSMBFile->tlink);
|
||
|
|
caps = le64_to_cpu(tcon->fsUnixInfo.Capability);
|
||
|
|
#ifdef CONFIG_CIFS_POSIX
|
||
|
|
if (CIFS_UNIX_EXTATTR_CAP & caps) {
|
||
|
|
__u64 ExtAttrMask = 0;
|
||
|
|
rc = CIFSGetExtAttr(xid, tcon,
|
||
|
|
pSMBFile->fid.netfid,
|
||
|
|
&ExtAttrBits, &ExtAttrMask);
|
||
|
|
if (rc == 0)
|
||
|
|
rc = put_user(ExtAttrBits &
|
||
|
|
FS_FL_USER_VISIBLE,
|
||
|
|
(int __user *)arg);
|
||
|
|
if (rc != EOPNOTSUPP)
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
#endif /* CONFIG_CIFS_POSIX */
|
||
|
|
rc = 0;
|
||
|
|
if (CIFS_I(inode)->cifsAttrs & ATTR_COMPRESSED) {
|
||
|
|
/* add in the compressed bit */
|
||
|
|
ExtAttrBits = FS_COMPR_FL;
|
||
|
|
rc = put_user(ExtAttrBits & FS_FL_USER_VISIBLE,
|
||
|
|
(int __user *)arg);
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case FS_IOC_SETFLAGS:
|
||
|
|
if (pSMBFile == NULL)
|
||
|
|
break;
|
||
|
|
tcon = tlink_tcon(pSMBFile->tlink);
|
||
|
|
caps = le64_to_cpu(tcon->fsUnixInfo.Capability);
|
||
|
|
|
||
|
|
if (get_user(ExtAttrBits, (int __user *)arg)) {
|
||
|
|
rc = -EFAULT;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* if (CIFS_UNIX_EXTATTR_CAP & caps)
|
||
|
|
* rc = CIFSSetExtAttr(xid, tcon,
|
||
|
|
* pSMBFile->fid.netfid,
|
||
|
|
* extAttrBits,
|
||
|
|
* &ExtAttrMask);
|
||
|
|
* if (rc != EOPNOTSUPP)
|
||
|
|
* break;
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* Currently only flag we can set is compressed flag */
|
||
|
|
if ((ExtAttrBits & FS_COMPR_FL) == 0)
|
||
|
|
break;
|
||
|
|
|
||
|
|
/* Try to set compress flag */
|
||
|
|
if (tcon->ses->server->ops->set_compression) {
|
||
|
|
rc = tcon->ses->server->ops->set_compression(
|
||
|
|
xid, tcon, pSMBFile);
|
||
|
|
cifs_dbg(FYI, "set compress flag rc %d\n", rc);
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case CIFS_IOC_COPYCHUNK_FILE:
|
||
|
|
rc = cifs_ioctl_clone(xid, filep, arg);
|
||
|
|
break;
|
||
|
|
case CIFS_IOC_SET_INTEGRITY:
|
||
|
|
if (pSMBFile == NULL)
|
||
|
|
break;
|
||
|
|
tcon = tlink_tcon(pSMBFile->tlink);
|
||
|
|
if (tcon->ses->server->ops->set_integrity)
|
||
|
|
rc = tcon->ses->server->ops->set_integrity(xid,
|
||
|
|
tcon, pSMBFile);
|
||
|
|
else
|
||
|
|
rc = -EOPNOTSUPP;
|
||
|
|
break;
|
||
|
|
case CIFS_IOC_GET_MNT_INFO:
|
||
|
|
if (pSMBFile == NULL)
|
||
|
|
break;
|
||
|
|
tcon = tlink_tcon(pSMBFile->tlink);
|
||
|
|
rc = smb_mnt_get_fsinfo(xid, tcon, (void __user *)arg);
|
||
|
|
break;
|
||
|
|
case CIFS_ENUMERATE_SNAPSHOTS:
|
||
|
|
if (pSMBFile == NULL)
|
||
|
|
break;
|
||
|
|
if (arg == 0) {
|
||
|
|
rc = -EINVAL;
|
||
|
|
goto cifs_ioc_exit;
|
||
|
|
}
|
||
|
|
tcon = tlink_tcon(pSMBFile->tlink);
|
||
|
|
if (tcon->ses->server->ops->enum_snapshots)
|
||
|
|
rc = tcon->ses->server->ops->enum_snapshots(xid, tcon,
|
||
|
|
pSMBFile, (void __user *)arg);
|
||
|
|
else
|
||
|
|
rc = -EOPNOTSUPP;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
cifs_dbg(FYI, "unsupported ioctl\n");
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
cifs_ioc_exit:
|
||
|
|
free_xid(xid);
|
||
|
|
return rc;
|
||
|
|
}
|