1 /*
2 * linux/fs/ocfs2/ioctl.c
3 *
4 * Copyright (C) 2006 Herbert Poetzl
5 * adapted from Remy Card's ext2/ioctl.c
6 */
7
8 #include <linux/fs.h>
9 #include <linux/mount.h>
10
11 #define MLOG_MASK_PREFIX ML_INODE
12 #include <cluster/masklog.h>
13
14 #include "ocfs2.h"
15 #include "alloc.h"
16 #include "dlmglue.h"
17 #include "file.h"
18 #include "inode.h"
19 #include "journal.h"
20
21 #include "ocfs2_fs.h"
22 #include "ioctl.h"
23 #include "resize.h"
24
25 #include <linux/ext2_fs.h>
26
27 static int ocfs2_get_inode_attr(struct inode *inode, unsigned *flags)
28 {
29 int status;
30
31 status = ocfs2_inode_lock(inode, NULL, 0);
32 if (status < 0) {
33 mlog_errno(status);
34 return status;
35 }
36 ocfs2_get_inode_flags(OCFS2_I(inode));
37 *flags = OCFS2_I(inode)->ip_attr;
38 ocfs2_inode_unlock(inode, 0);
39
40 mlog_exit(status);
41 return status;
42 }
43
44 static int ocfs2_set_inode_attr(struct inode *inode, unsigned flags,
45 unsigned mask)
46 {
47 struct ocfs2_inode_info *ocfs2_inode = OCFS2_I(inode);
48 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
49 handle_t *handle = NULL;
50 struct buffer_head *bh = NULL;
51 unsigned oldflags;
52 int status;
53
54 mutex_lock(&inode->i_mutex);
55
56 status = ocfs2_inode_lock(inode, &bh, 1);
57 if (status < 0) {
58 mlog_errno(status);
59 goto bail;
60 }
61
62 status = -EACCES;
63 if (!is_owner_or_cap(inode))
64 goto bail_unlock;
65
66 if (!S_ISDIR(inode->i_mode))
67 flags &= ~OCFS2_DIRSYNC_FL;
68
69 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
70 if (IS_ERR(handle)) {
71 status = PTR_ERR(handle);
72 mlog_errno(status);
73 goto bail_unlock;
74 }
75
76 oldflags = ocfs2_inode->ip_attr;
77 flags = flags & mask;
78 flags |= oldflags & ~mask;
79
80 /*
81 * The IMMUTABLE and APPEND_ONLY flags can only be changed by
82 * the relevant capability.
83 */
84 status = -EPERM;
85 if ((oldflags & OCFS2_IMMUTABLE_FL) || ((flags ^ oldflags) &
86 (OCFS2_APPEND_FL | OCFS2_IMMUTABLE_FL))) {
87 if (!capable(CAP_LINUX_IMMUTABLE))
88 goto bail_unlock;
89 }
90
91 ocfs2_inode->ip_attr = flags;
92 ocfs2_set_inode_flags(inode);
93
94 status = ocfs2_mark_inode_dirty(handle, inode, bh);
95 if (status < 0)
96 mlog_errno(status);
97
98 ocfs2_commit_trans(osb, handle);
99 bail_unlock:
100 ocfs2_inode_unlock(inode, 1);
101 bail:
102 mutex_unlock(&inode->i_mutex);
103
104 brelse(bh);
105
106 mlog_exit(status);
107 return status;
108 }
109
110 long ocfs2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
111 {
112 struct inode *inode = filp->f_path.dentry->d_inode;
113 unsigned int flags;
114 int new_clusters;
115 int status;
116 struct ocfs2_space_resv sr;
117 struct ocfs2_new_group_input input;
118
119 switch (cmd) {
120 case OCFS2_IOC_GETFLAGS:
121 status = ocfs2_get_inode_attr(inode, &flags);
122 if (status < 0)
123 return status;
124
125 flags &= OCFS2_FL_VISIBLE;
126 return put_user(flags, (int __user *) arg);
127 case OCFS2_IOC_SETFLAGS:
128 if (get_user(flags, (int __user *) arg))
129 return -EFAULT;
130
131 status = mnt_want_write(filp->f_path.mnt);
132 if (status)
133 return status;
134 status = ocfs2_set_inode_attr(inode, flags,
135 OCFS2_FL_MODIFIABLE);
136 mnt_drop_write(filp->f_path.mnt);
137 return status;
138 case OCFS2_IOC_RESVSP:
139 case OCFS2_IOC_RESVSP64:
140 case OCFS2_IOC_UNRESVSP:
141 case OCFS2_IOC_UNRESVSP64:
142 if (copy_from_user(&sr, (int __user *) arg, sizeof(sr)))
143 return -EFAULT;
144
145 return ocfs2_change_file_space(filp, cmd, &sr);
146 case OCFS2_IOC_GROUP_EXTEND:
147 if (!capable(CAP_SYS_RESOURCE))
148 return -EPERM;
149
150 if (get_user(new_clusters, (int __user *)arg))
151 return -EFAULT;
152
153 return ocfs2_group_extend(inode, new_clusters);
154 case OCFS2_IOC_GROUP_ADD:
155 case OCFS2_IOC_GROUP_ADD64:
156 if (!capable(CAP_SYS_RESOURCE))
157 return -EPERM;
158
159 if (copy_from_user(&input, (int __user *) arg, sizeof(input)))
160 return -EFAULT;
161
162 return ocfs2_group_add(inode, &input);
163 default:
164 return -ENOTTY;
165 }
166 }
167
168 #ifdef CONFIG_COMPAT
169 long ocfs2_compat_ioctl(struct file *file, unsigned cmd, unsigned long arg)
170 {
171 switch (cmd) {
172 case OCFS2_IOC32_GETFLAGS:
173 cmd = OCFS2_IOC_GETFLAGS;
174 break;
175 case OCFS2_IOC32_SETFLAGS:
176 cmd = OCFS2_IOC_SETFLAGS;
177 break;
178 case OCFS2_IOC_RESVSP:
179 case OCFS2_IOC_RESVSP64:
180 case OCFS2_IOC_UNRESVSP:
181 case OCFS2_IOC_UNRESVSP64:
182 case OCFS2_IOC_GROUP_EXTEND:
183 case OCFS2_IOC_GROUP_ADD:
184 case OCFS2_IOC_GROUP_ADD64:
185 break;
186 default:
187 return -ENOIOCTLCMD;
188 }
189
190 return ocfs2_ioctl(file, cmd, arg);
191 }
192 #endif
193
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