4 * vfs operations that deal with io control
6 * Copyright (C) International Business Machines Corp., 2005,2013
7 * Author(s): Steve French (sfrench@us.ibm.com)
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.
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.
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
25 #include <linux/file.h>
26 #include <linux/mount.h>
28 #include <linux/pagemap.h>
31 #include "cifsproto.h"
32 #include "cifs_debug.h"
34 #include "cifs_ioctl.h"
35 #include <linux/btrfs.h>
37 static long cifs_ioctl_copychunk(unsigned int xid, struct file *dst_file,
42 struct inode *src_inode;
44 cifs_dbg(FYI, "ioctl copychunk range\n");
45 /* the destination must be opened for writing */
46 if (!(dst_file->f_mode & FMODE_WRITE)) {
47 cifs_dbg(FYI, "file target not open for write\n");
51 /* check if target volume is readonly and take reference */
52 rc = mnt_want_write_file(dst_file);
54 cifs_dbg(FYI, "mnt_want_write failed with rc %d\n", rc);
58 src_file = fdget(srcfd);
64 if (src_file.file->f_op->unlocked_ioctl != cifs_ioctl) {
66 cifs_dbg(VFS, "src file seems to be from a different filesystem type\n");
70 src_inode = file_inode(src_file.file);
72 if (S_ISDIR(src_inode->i_mode))
75 rc = cifs_file_copychunk_range(xid, src_file.file, 0, dst_file, 0,
76 src_inode->i_size, 0);
82 mnt_drop_write_file(dst_file);
86 static long smb_mnt_get_fsinfo(unsigned int xid, struct cifs_tcon *tcon,
90 struct smb_mnt_fs_info *fsinf;
92 fsinf = kzalloc(sizeof(struct smb_mnt_fs_info), GFP_KERNEL);
97 fsinf->protocol_id = tcon->ses->server->vals->protocol_id;
98 fsinf->device_characteristics =
99 le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics);
100 fsinf->device_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
101 fsinf->fs_attributes = le32_to_cpu(tcon->fsAttrInfo.Attributes);
102 fsinf->max_path_component =
103 le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength);
104 fsinf->vol_serial_number = tcon->vol_serial_number;
105 fsinf->vol_create_time = le64_to_cpu(tcon->vol_create_time);
106 fsinf->share_flags = tcon->share_flags;
107 fsinf->share_caps = le32_to_cpu(tcon->capabilities);
108 fsinf->sector_flags = tcon->ss_flags;
109 fsinf->optimal_sector_size = tcon->perf_sector_size;
110 fsinf->max_bytes_chunk = tcon->max_bytes_chunk;
111 fsinf->maximal_access = tcon->maximal_access;
112 fsinf->cifs_posix_caps = le64_to_cpu(tcon->fsUnixInfo.Capability);
114 if (copy_to_user(arg, fsinf, sizeof(struct smb_mnt_fs_info)))
121 long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg)
123 struct inode *inode = file_inode(filep);
124 int rc = -ENOTTY; /* strange error - but the precedent */
126 struct cifsFileInfo *pSMBFile = filep->private_data;
127 struct cifs_tcon *tcon;
128 __u64 ExtAttrBits = 0;
133 cifs_dbg(FYI, "cifs ioctl 0x%x\n", command);
135 case FS_IOC_GETFLAGS:
136 if (pSMBFile == NULL)
138 tcon = tlink_tcon(pSMBFile->tlink);
139 caps = le64_to_cpu(tcon->fsUnixInfo.Capability);
140 #ifdef CONFIG_CIFS_POSIX
141 if (CIFS_UNIX_EXTATTR_CAP & caps) {
142 __u64 ExtAttrMask = 0;
143 rc = CIFSGetExtAttr(xid, tcon,
144 pSMBFile->fid.netfid,
145 &ExtAttrBits, &ExtAttrMask);
147 rc = put_user(ExtAttrBits &
150 if (rc != EOPNOTSUPP)
153 #endif /* CONFIG_CIFS_POSIX */
155 if (CIFS_I(inode)->cifsAttrs & ATTR_COMPRESSED) {
156 /* add in the compressed bit */
157 ExtAttrBits = FS_COMPR_FL;
158 rc = put_user(ExtAttrBits & FS_FL_USER_VISIBLE,
162 case FS_IOC_SETFLAGS:
163 if (pSMBFile == NULL)
165 tcon = tlink_tcon(pSMBFile->tlink);
166 caps = le64_to_cpu(tcon->fsUnixInfo.Capability);
168 if (get_user(ExtAttrBits, (int __user *)arg)) {
174 * if (CIFS_UNIX_EXTATTR_CAP & caps)
175 * rc = CIFSSetExtAttr(xid, tcon,
176 * pSMBFile->fid.netfid,
179 * if (rc != EOPNOTSUPP)
183 /* Currently only flag we can set is compressed flag */
184 if ((ExtAttrBits & FS_COMPR_FL) == 0)
187 /* Try to set compress flag */
188 if (tcon->ses->server->ops->set_compression) {
189 rc = tcon->ses->server->ops->set_compression(
190 xid, tcon, pSMBFile);
191 cifs_dbg(FYI, "set compress flag rc %d\n", rc);
194 case CIFS_IOC_COPYCHUNK_FILE:
195 rc = cifs_ioctl_copychunk(xid, filep, arg);
197 case CIFS_IOC_SET_INTEGRITY:
198 if (pSMBFile == NULL)
200 tcon = tlink_tcon(pSMBFile->tlink);
201 if (tcon->ses->server->ops->set_integrity)
202 rc = tcon->ses->server->ops->set_integrity(xid,
207 case CIFS_IOC_GET_MNT_INFO:
208 if (pSMBFile == NULL)
210 tcon = tlink_tcon(pSMBFile->tlink);
211 rc = smb_mnt_get_fsinfo(xid, tcon, (void __user *)arg);
213 case CIFS_ENUMERATE_SNAPSHOTS:
214 if (pSMBFile == NULL)
220 tcon = tlink_tcon(pSMBFile->tlink);
221 if (tcon->ses->server->ops->enum_snapshots)
222 rc = tcon->ses->server->ops->enum_snapshots(xid, tcon,
223 pSMBFile, (void __user *)arg);
228 cifs_dbg(FYI, "unsupported ioctl\n");