blob: 16d8861b281f05285039678f877d56f8c24552df [file] [log] [blame]
Herbert Poetzlca4d1472006-07-03 17:27:12 -07001/*
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 "inode.h"
18#include "journal.h"
19
20#include "ocfs2_fs.h"
Adrian Bunk2d562512006-07-10 01:32:51 +020021#include "ioctl.h"
22
Herbert Poetzlca4d1472006-07-03 17:27:12 -070023#include <linux/ext2_fs.h>
24
25static int ocfs2_get_inode_attr(struct inode *inode, unsigned *flags)
26{
27 int status;
28
Mark Fasheh4bcec182006-10-09 16:02:40 -070029 status = ocfs2_meta_lock(inode, NULL, 0);
Herbert Poetzlca4d1472006-07-03 17:27:12 -070030 if (status < 0) {
31 mlog_errno(status);
32 return status;
33 }
34 *flags = OCFS2_I(inode)->ip_attr;
35 ocfs2_meta_unlock(inode, 0);
36
37 mlog_exit(status);
38 return status;
39}
40
41static int ocfs2_set_inode_attr(struct inode *inode, unsigned flags,
42 unsigned mask)
43{
44 struct ocfs2_inode_info *ocfs2_inode = OCFS2_I(inode);
45 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
46 struct ocfs2_journal_handle *handle = NULL;
47 struct buffer_head *bh = NULL;
48 unsigned oldflags;
49 int status;
50
51 mutex_lock(&inode->i_mutex);
52
Mark Fasheh4bcec182006-10-09 16:02:40 -070053 status = ocfs2_meta_lock(inode, &bh, 1);
Herbert Poetzlca4d1472006-07-03 17:27:12 -070054 if (status < 0) {
55 mlog_errno(status);
56 goto bail;
57 }
58
59 status = -EROFS;
60 if (IS_RDONLY(inode))
61 goto bail_unlock;
62
63 status = -EACCES;
64 if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
65 goto bail_unlock;
66
67 if (!S_ISDIR(inode->i_mode))
68 flags &= ~OCFS2_DIRSYNC_FL;
69
70 handle = ocfs2_start_trans(osb, NULL, OCFS2_INODE_UPDATE_CREDITS);
71 if (IS_ERR(handle)) {
72 status = PTR_ERR(handle);
73 mlog_errno(status);
74 goto bail_unlock;
75 }
76
77 oldflags = ocfs2_inode->ip_attr;
78 flags = flags & mask;
79 flags |= oldflags & ~mask;
80
81 /*
82 * The IMMUTABLE and APPEND_ONLY flags can only be changed by
83 * the relevant capability.
84 */
85 status = -EPERM;
86 if ((oldflags & OCFS2_IMMUTABLE_FL) || ((flags ^ oldflags) &
87 (OCFS2_APPEND_FL | OCFS2_IMMUTABLE_FL))) {
88 if (!capable(CAP_LINUX_IMMUTABLE))
89 goto bail_unlock;
90 }
91
92 ocfs2_inode->ip_attr = flags;
93 ocfs2_set_inode_flags(inode);
94
95 status = ocfs2_mark_inode_dirty(handle, inode, bh);
96 if (status < 0)
97 mlog_errno(status);
98
99 ocfs2_commit_trans(handle);
100bail_unlock:
101 ocfs2_meta_unlock(inode, 1);
102bail:
103 mutex_unlock(&inode->i_mutex);
104
105 if (bh)
106 brelse(bh);
107
108 mlog_exit(status);
109 return status;
110}
111
112int ocfs2_ioctl(struct inode * inode, struct file * filp,
113 unsigned int cmd, unsigned long arg)
114{
115 unsigned int flags;
116 int status;
117
118 switch (cmd) {
119 case OCFS2_IOC_GETFLAGS:
120 status = ocfs2_get_inode_attr(inode, &flags);
121 if (status < 0)
122 return status;
123
124 flags &= OCFS2_FL_VISIBLE;
125 return put_user(flags, (int __user *) arg);
126 case OCFS2_IOC_SETFLAGS:
127 if (get_user(flags, (int __user *) arg))
128 return -EFAULT;
129
130 return ocfs2_set_inode_attr(inode, flags,
131 OCFS2_FL_MODIFIABLE);
132 default:
133 return -ENOTTY;
134 }
135}
136