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ca4d147e HP |
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 "inode.h" | |
18 | #include "journal.h" | |
19 | ||
20 | #include "ocfs2_fs.h" | |
2d562518 AB |
21 | #include "ioctl.h" |
22 | ||
ca4d147e HP |
23 | #include <linux/ext2_fs.h> |
24 | ||
25 | static int ocfs2_get_inode_attr(struct inode *inode, unsigned *flags) | |
26 | { | |
27 | int status; | |
28 | ||
4bcec184 | 29 | status = ocfs2_meta_lock(inode, NULL, 0); |
ca4d147e HP |
30 | if (status < 0) { |
31 | mlog_errno(status); | |
32 | return status; | |
33 | } | |
6e4b0d56 | 34 | ocfs2_get_inode_flags(OCFS2_I(inode)); |
ca4d147e HP |
35 | *flags = OCFS2_I(inode)->ip_attr; |
36 | ocfs2_meta_unlock(inode, 0); | |
37 | ||
38 | mlog_exit(status); | |
39 | return status; | |
40 | } | |
41 | ||
42 | static int ocfs2_set_inode_attr(struct inode *inode, unsigned flags, | |
43 | unsigned mask) | |
44 | { | |
45 | struct ocfs2_inode_info *ocfs2_inode = OCFS2_I(inode); | |
46 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1fabe148 | 47 | handle_t *handle = NULL; |
ca4d147e HP |
48 | struct buffer_head *bh = NULL; |
49 | unsigned oldflags; | |
50 | int status; | |
51 | ||
52 | mutex_lock(&inode->i_mutex); | |
53 | ||
4bcec184 | 54 | status = ocfs2_meta_lock(inode, &bh, 1); |
ca4d147e HP |
55 | if (status < 0) { |
56 | mlog_errno(status); | |
57 | goto bail; | |
58 | } | |
59 | ||
60 | status = -EROFS; | |
61 | if (IS_RDONLY(inode)) | |
62 | goto bail_unlock; | |
63 | ||
64 | status = -EACCES; | |
65 | if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER)) | |
66 | goto bail_unlock; | |
67 | ||
68 | if (!S_ISDIR(inode->i_mode)) | |
69 | flags &= ~OCFS2_DIRSYNC_FL; | |
70 | ||
65eff9cc | 71 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
ca4d147e HP |
72 | if (IS_ERR(handle)) { |
73 | status = PTR_ERR(handle); | |
74 | mlog_errno(status); | |
75 | goto bail_unlock; | |
76 | } | |
77 | ||
78 | oldflags = ocfs2_inode->ip_attr; | |
79 | flags = flags & mask; | |
80 | flags |= oldflags & ~mask; | |
81 | ||
82 | /* | |
83 | * The IMMUTABLE and APPEND_ONLY flags can only be changed by | |
84 | * the relevant capability. | |
85 | */ | |
86 | status = -EPERM; | |
87 | if ((oldflags & OCFS2_IMMUTABLE_FL) || ((flags ^ oldflags) & | |
88 | (OCFS2_APPEND_FL | OCFS2_IMMUTABLE_FL))) { | |
89 | if (!capable(CAP_LINUX_IMMUTABLE)) | |
90 | goto bail_unlock; | |
91 | } | |
92 | ||
93 | ocfs2_inode->ip_attr = flags; | |
94 | ocfs2_set_inode_flags(inode); | |
95 | ||
96 | status = ocfs2_mark_inode_dirty(handle, inode, bh); | |
97 | if (status < 0) | |
98 | mlog_errno(status); | |
99 | ||
02dc1af4 | 100 | ocfs2_commit_trans(osb, handle); |
ca4d147e HP |
101 | bail_unlock: |
102 | ocfs2_meta_unlock(inode, 1); | |
103 | bail: | |
104 | mutex_unlock(&inode->i_mutex); | |
105 | ||
106 | if (bh) | |
107 | brelse(bh); | |
108 | ||
109 | mlog_exit(status); | |
110 | return status; | |
111 | } | |
112 | ||
113 | int ocfs2_ioctl(struct inode * inode, struct file * filp, | |
114 | unsigned int cmd, unsigned long arg) | |
115 | { | |
116 | unsigned int flags; | |
117 | int status; | |
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 | return ocfs2_set_inode_attr(inode, flags, | |
132 | OCFS2_FL_MODIFIABLE); | |
133 | default: | |
134 | return -ENOTTY; | |
135 | } | |
136 | } | |
137 | ||
586d232b MF |
138 | #ifdef CONFIG_COMPAT |
139 | long ocfs2_compat_ioctl(struct file *file, unsigned cmd, unsigned long arg) | |
140 | { | |
141 | struct inode *inode = file->f_path.dentry->d_inode; | |
142 | int ret; | |
143 | ||
144 | switch (cmd) { | |
145 | case OCFS2_IOC32_GETFLAGS: | |
146 | cmd = OCFS2_IOC_GETFLAGS; | |
147 | break; | |
148 | case OCFS2_IOC32_SETFLAGS: | |
149 | cmd = OCFS2_IOC_SETFLAGS; | |
150 | break; | |
151 | default: | |
152 | return -ENOIOCTLCMD; | |
153 | } | |
154 | ||
155 | lock_kernel(); | |
156 | ret = ocfs2_ioctl(inode, file, cmd, arg); | |
157 | unlock_kernel(); | |
158 | return ret; | |
159 | } | |
160 | #endif |