| /* |
| * 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 "cifspdu.h" |
| #include "cifsglob.h" |
| #include "cifsproto.h" |
| #include "cifs_debug.h" |
| #include "cifsfs.h" |
| |
| 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 ExtAttrMask = 0; |
| __u64 caps; |
| |
| xid = get_xid(); |
| |
| cifs_dbg(FYI, "ioctl file %p cmd %u arg %lu\n", filep, command, arg); |
| |
| cifs_sb = CIFS_SB(inode->i_sb); |
| |
| 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) { |
| 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; |
| default: |
| cifs_dbg(FYI, "unsupported ioctl\n"); |
| break; |
| } |
| |
| free_xid(xid); |
| return rc; |
| } |