| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame] | 1 | /* |
| 2 | * fs/cifs/ioctl.c |
| 3 | * |
| 4 | * vfs operations that deal with io control |
| 5 | * |
| 6 | * Copyright (C) International Business Machines Corp., 2005,2007 |
| 7 | * Author(s): Steve French (sfrench@us.ibm.com) |
| 8 | * |
| 9 | * This library is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU Lesser General Public License as published |
| 11 | * by the Free Software Foundation; either version 2.1 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This library is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
| 17 | * the GNU Lesser General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU Lesser General Public License |
| 20 | * along with this library; if not, write to the Free Software |
| 21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 22 | */ |
| 23 | |
| 24 | #include <linux/fs.h> |
| 25 | #include "cifspdu.h" |
| 26 | #include "cifsglob.h" |
| 27 | #include "cifsproto.h" |
| 28 | #include "cifs_debug.h" |
| 29 | #include "cifsfs.h" |
| 30 | |
| 31 | #define CIFS_IOC_CHECKUMOUNT _IO(0xCF, 2) |
| 32 | |
| 33 | long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg) |
| 34 | { |
| 35 | struct inode *inode = filep->f_dentry->d_inode; |
| 36 | int rc = -ENOTTY; /* strange error - but the precedent */ |
| 37 | int xid; |
| 38 | struct cifs_sb_info *cifs_sb; |
| 39 | #ifdef CONFIG_CIFS_POSIX |
| 40 | struct cifsFileInfo *pSMBFile = filep->private_data; |
| 41 | struct cifs_tcon *tcon; |
| 42 | __u64 ExtAttrBits = 0; |
| 43 | __u64 ExtAttrMask = 0; |
| 44 | __u64 caps; |
| 45 | #endif /* CONFIG_CIFS_POSIX */ |
| 46 | |
| 47 | xid = GetXid(); |
| 48 | |
| 49 | cFYI(1, "ioctl file %p cmd %u arg %lu", filep, command, arg); |
| 50 | |
| 51 | cifs_sb = CIFS_SB(inode->i_sb); |
| 52 | |
| 53 | switch (command) { |
| 54 | case CIFS_IOC_CHECKUMOUNT: |
| 55 | cFYI(1, "User unmount attempted"); |
| 56 | if (cifs_sb->mnt_uid == current_uid()) |
| 57 | rc = 0; |
| 58 | else { |
| 59 | rc = -EACCES; |
| 60 | cFYI(1, "uids do not match"); |
| 61 | } |
| 62 | break; |
| 63 | #ifdef CONFIG_CIFS_POSIX |
| 64 | case FS_IOC_GETFLAGS: |
| 65 | if (pSMBFile == NULL) |
| 66 | break; |
| 67 | tcon = tlink_tcon(pSMBFile->tlink); |
| 68 | caps = le64_to_cpu(tcon->fsUnixInfo.Capability); |
| 69 | if (CIFS_UNIX_EXTATTR_CAP & caps) { |
| 70 | rc = CIFSGetExtAttr(xid, tcon, pSMBFile->netfid, |
| 71 | &ExtAttrBits, &ExtAttrMask); |
| 72 | if (rc == 0) |
| 73 | rc = put_user(ExtAttrBits & |
| 74 | FS_FL_USER_VISIBLE, |
| 75 | (int __user *)arg); |
| 76 | } |
| 77 | break; |
| 78 | |
| 79 | case FS_IOC_SETFLAGS: |
| 80 | if (pSMBFile == NULL) |
| 81 | break; |
| 82 | tcon = tlink_tcon(pSMBFile->tlink); |
| 83 | caps = le64_to_cpu(tcon->fsUnixInfo.Capability); |
| 84 | if (CIFS_UNIX_EXTATTR_CAP & caps) { |
| 85 | if (get_user(ExtAttrBits, (int __user *)arg)) { |
| 86 | rc = -EFAULT; |
| 87 | break; |
| 88 | } |
| 89 | /* rc= CIFSGetExtAttr(xid,tcon,pSMBFile->netfid, |
| 90 | extAttrBits, &ExtAttrMask);*/ |
| 91 | } |
| 92 | cFYI(1, "set flags not implemented yet"); |
| 93 | break; |
| 94 | #endif /* CONFIG_CIFS_POSIX */ |
| 95 | default: |
| 96 | cFYI(1, "unsupported ioctl"); |
| 97 | break; |
| 98 | } |
| 99 | |
| 100 | FreeXid(xid); |
| 101 | return rc; |
| 102 | } |