Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * fs/cifs/ioctl.c | |
3 | * | |
4 | * vfs operations that deal with io control | |
5 | * | |
64a5cfa6 | 6 | * Copyright (C) International Business Machines Corp., 2005,2013 |
1da177e4 LT |
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 | */ | |
f654bac2 | 23 | |
1da177e4 | 24 | #include <linux/fs.h> |
41c1358e SF |
25 | #include <linux/file.h> |
26 | #include <linux/mount.h> | |
27 | #include <linux/mm.h> | |
28 | #include <linux/pagemap.h> | |
1da177e4 LT |
29 | #include "cifspdu.h" |
30 | #include "cifsglob.h" | |
31 | #include "cifsproto.h" | |
32 | #include "cifs_debug.h" | |
c67593a0 | 33 | #include "cifsfs.h" |
02b16665 | 34 | #include <linux/btrfs.h> |
1da177e4 | 35 | |
f19e84df SF |
36 | #define CIFS_IOCTL_MAGIC 0xCF |
37 | #define CIFS_IOC_COPYCHUNK_FILE _IOW(CIFS_IOCTL_MAGIC, 3, int) | |
b3152e2c | 38 | #define CIFS_IOC_SET_INTEGRITY _IO(CIFS_IOCTL_MAGIC, 4) |
f19e84df | 39 | |
41c1358e | 40 | static long cifs_ioctl_clone(unsigned int xid, struct file *dst_file, |
02b16665 SF |
41 | unsigned long srcfd, u64 off, u64 len, u64 destoff, |
42 | bool dup_extents) | |
41c1358e SF |
43 | { |
44 | int rc; | |
45 | struct cifsFileInfo *smb_file_target = dst_file->private_data; | |
46 | struct inode *target_inode = file_inode(dst_file); | |
47 | struct cifs_tcon *target_tcon; | |
48 | struct fd src_file; | |
49 | struct cifsFileInfo *smb_file_src; | |
50 | struct inode *src_inode; | |
51 | struct cifs_tcon *src_tcon; | |
52 | ||
53 | cifs_dbg(FYI, "ioctl clone range\n"); | |
54 | /* the destination must be opened for writing */ | |
55 | if (!(dst_file->f_mode & FMODE_WRITE)) { | |
56 | cifs_dbg(FYI, "file target not open for write\n"); | |
57 | return -EINVAL; | |
58 | } | |
59 | ||
60 | /* check if target volume is readonly and take reference */ | |
61 | rc = mnt_want_write_file(dst_file); | |
62 | if (rc) { | |
63 | cifs_dbg(FYI, "mnt_want_write failed with rc %d\n", rc); | |
64 | return rc; | |
65 | } | |
66 | ||
67 | src_file = fdget(srcfd); | |
68 | if (!src_file.file) { | |
69 | rc = -EBADF; | |
70 | goto out_drop_write; | |
71 | } | |
72 | ||
73 | if ((!src_file.file->private_data) || (!dst_file->private_data)) { | |
74 | rc = -EBADF; | |
75 | cifs_dbg(VFS, "missing cifsFileInfo on copy range src file\n"); | |
76 | goto out_fput; | |
77 | } | |
78 | ||
79 | rc = -EXDEV; | |
80 | smb_file_target = dst_file->private_data; | |
81 | smb_file_src = src_file.file->private_data; | |
82 | src_tcon = tlink_tcon(smb_file_src->tlink); | |
83 | target_tcon = tlink_tcon(smb_file_target->tlink); | |
84 | ||
85 | /* check if source and target are on same tree connection */ | |
86 | if (src_tcon != target_tcon) { | |
87 | cifs_dbg(VFS, "file copy src and target on different volume\n"); | |
88 | goto out_fput; | |
89 | } | |
90 | ||
2d4f84bd | 91 | src_inode = file_inode(src_file.file); |
378ff1a5 AV |
92 | rc = -EINVAL; |
93 | if (S_ISDIR(src_inode->i_mode)) | |
94 | goto out_fput; | |
41c1358e SF |
95 | |
96 | /* | |
97 | * Note: cifs case is easier than btrfs since server responsible for | |
98 | * checks for proper open modes and file type and if it wants | |
99 | * server could even support copy of range where source = target | |
100 | */ | |
378ff1a5 | 101 | lock_two_nondirectories(target_inode, src_inode); |
41c1358e SF |
102 | |
103 | /* determine range to clone */ | |
104 | rc = -EINVAL; | |
105 | if (off + len > src_inode->i_size || off + len < off) | |
106 | goto out_unlock; | |
107 | if (len == 0) | |
108 | len = src_inode->i_size - off; | |
109 | ||
110 | cifs_dbg(FYI, "about to flush pages\n"); | |
111 | /* should we flush first and last page first */ | |
112 | truncate_inode_pages_range(&target_inode->i_data, destoff, | |
113 | PAGE_CACHE_ALIGN(destoff + len)-1); | |
114 | ||
02b16665 SF |
115 | if (dup_extents && target_tcon->ses->server->ops->duplicate_extents) |
116 | rc = target_tcon->ses->server->ops->duplicate_extents(xid, | |
117 | smb_file_src, smb_file_target, off, len, destoff); | |
118 | else if (!dup_extents && target_tcon->ses->server->ops->clone_range) | |
41c1358e SF |
119 | rc = target_tcon->ses->server->ops->clone_range(xid, |
120 | smb_file_src, smb_file_target, off, len, destoff); | |
02b16665 SF |
121 | else |
122 | rc = -EOPNOTSUPP; | |
41c1358e SF |
123 | |
124 | /* force revalidate of size and timestamps of target file now | |
125 | that target is updated on the server */ | |
126 | CIFS_I(target_inode)->time = 0; | |
127 | out_unlock: | |
128 | /* although unlocking in the reverse order from locking is not | |
129 | strictly necessary here it is a little cleaner to be consistent */ | |
378ff1a5 | 130 | unlock_two_nondirectories(src_inode, target_inode); |
41c1358e SF |
131 | out_fput: |
132 | fdput(src_file); | |
133 | out_drop_write: | |
134 | mnt_drop_write_file(dst_file); | |
135 | return rc; | |
136 | } | |
137 | ||
f9ddcca4 | 138 | long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg) |
1da177e4 | 139 | { |
496ad9aa | 140 | struct inode *inode = file_inode(filep); |
1da177e4 | 141 | int rc = -ENOTTY; /* strange error - but the precedent */ |
6d5786a3 | 142 | unsigned int xid; |
c81156dd | 143 | struct cifs_sb_info *cifs_sb; |
ba00ba64 | 144 | struct cifsFileInfo *pSMBFile = filep->private_data; |
96daf2b0 | 145 | struct cifs_tcon *tcon; |
f654bac2 | 146 | __u64 ExtAttrBits = 0; |
61876395 | 147 | __u64 caps; |
f654bac2 | 148 | |
6d5786a3 | 149 | xid = get_xid(); |
f654bac2 | 150 | |
f96637be | 151 | cifs_dbg(FYI, "ioctl file %p cmd %u arg %lu\n", filep, command, arg); |
f28ac91b | 152 | |
f654bac2 | 153 | cifs_sb = CIFS_SB(inode->i_sb); |
f654bac2 | 154 | |
5fdae1f6 | 155 | switch (command) { |
36695673 | 156 | case FS_IOC_GETFLAGS: |
61876395 JL |
157 | if (pSMBFile == NULL) |
158 | break; | |
159 | tcon = tlink_tcon(pSMBFile->tlink); | |
160 | caps = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
64a5cfa6 | 161 | #ifdef CONFIG_CIFS_POSIX |
5fdae1f6 | 162 | if (CIFS_UNIX_EXTATTR_CAP & caps) { |
f10d9ba4 | 163 | __u64 ExtAttrMask = 0; |
4b4de76e PS |
164 | rc = CIFSGetExtAttr(xid, tcon, |
165 | pSMBFile->fid.netfid, | |
166 | &ExtAttrBits, &ExtAttrMask); | |
5fdae1f6 | 167 | if (rc == 0) |
f654bac2 | 168 | rc = put_user(ExtAttrBits & |
36695673 | 169 | FS_FL_USER_VISIBLE, |
f654bac2 | 170 | (int __user *)arg); |
64a5cfa6 SF |
171 | if (rc != EOPNOTSUPP) |
172 | break; | |
173 | } | |
174 | #endif /* CONFIG_CIFS_POSIX */ | |
175 | rc = 0; | |
176 | if (CIFS_I(inode)->cifsAttrs & ATTR_COMPRESSED) { | |
177 | /* add in the compressed bit */ | |
178 | ExtAttrBits = FS_COMPR_FL; | |
179 | rc = put_user(ExtAttrBits & FS_FL_USER_VISIBLE, | |
180 | (int __user *)arg); | |
f654bac2 SF |
181 | } |
182 | break; | |
36695673 | 183 | case FS_IOC_SETFLAGS: |
61876395 JL |
184 | if (pSMBFile == NULL) |
185 | break; | |
186 | tcon = tlink_tcon(pSMBFile->tlink); | |
187 | caps = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
64a5cfa6 SF |
188 | |
189 | if (get_user(ExtAttrBits, (int __user *)arg)) { | |
190 | rc = -EFAULT; | |
191 | break; | |
192 | } | |
193 | ||
194 | /* | |
195 | * if (CIFS_UNIX_EXTATTR_CAP & caps) | |
196 | * rc = CIFSSetExtAttr(xid, tcon, | |
197 | * pSMBFile->fid.netfid, | |
198 | * extAttrBits, | |
199 | * &ExtAttrMask); | |
200 | * if (rc != EOPNOTSUPP) | |
201 | * break; | |
202 | */ | |
203 | ||
204 | /* Currently only flag we can set is compressed flag */ | |
205 | if ((ExtAttrBits & FS_COMPR_FL) == 0) | |
206 | break; | |
207 | ||
208 | /* Try to set compress flag */ | |
209 | if (tcon->ses->server->ops->set_compression) { | |
210 | rc = tcon->ses->server->ops->set_compression( | |
211 | xid, tcon, pSMBFile); | |
212 | cifs_dbg(FYI, "set compress flag rc %d\n", rc); | |
f654bac2 | 213 | } |
f654bac2 | 214 | break; |
f19e84df | 215 | case CIFS_IOC_COPYCHUNK_FILE: |
02b16665 SF |
216 | rc = cifs_ioctl_clone(xid, filep, arg, 0, 0, 0, false); |
217 | break; | |
218 | case BTRFS_IOC_CLONE: | |
219 | rc = cifs_ioctl_clone(xid, filep, arg, 0, 0, 0, true); | |
41c1358e | 220 | break; |
b3152e2c SF |
221 | case CIFS_IOC_SET_INTEGRITY: |
222 | if (pSMBFile == NULL) | |
223 | break; | |
224 | tcon = tlink_tcon(pSMBFile->tlink); | |
225 | if (tcon->ses->server->ops->set_integrity) | |
226 | rc = tcon->ses->server->ops->set_integrity(xid, | |
227 | tcon, pSMBFile); | |
228 | else | |
229 | rc = -EOPNOTSUPP; | |
230 | break; | |
1da177e4 | 231 | default: |
f96637be | 232 | cifs_dbg(FYI, "unsupported ioctl\n"); |
f28ac91b | 233 | break; |
1da177e4 | 234 | } |
f654bac2 | 235 | |
6d5786a3 | 236 | free_xid(xid); |
1da177e4 | 237 | return rc; |
5fdae1f6 | 238 | } |