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Commit | Line | Data |
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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" | |
b2580103 | 17 | #include "file.h" |
ca4d147e HP |
18 | #include "inode.h" |
19 | #include "journal.h" | |
20 | ||
21 | #include "ocfs2_fs.h" | |
2d562518 AB |
22 | #include "ioctl.h" |
23 | ||
ca4d147e HP |
24 | #include <linux/ext2_fs.h> |
25 | ||
26 | static int ocfs2_get_inode_attr(struct inode *inode, unsigned *flags) | |
27 | { | |
28 | int status; | |
29 | ||
4bcec184 | 30 | status = ocfs2_meta_lock(inode, NULL, 0); |
ca4d147e HP |
31 | if (status < 0) { |
32 | mlog_errno(status); | |
33 | return status; | |
34 | } | |
6e4b0d56 | 35 | ocfs2_get_inode_flags(OCFS2_I(inode)); |
ca4d147e HP |
36 | *flags = OCFS2_I(inode)->ip_attr; |
37 | ocfs2_meta_unlock(inode, 0); | |
38 | ||
39 | mlog_exit(status); | |
40 | return status; | |
41 | } | |
42 | ||
43 | static int ocfs2_set_inode_attr(struct inode *inode, unsigned flags, | |
44 | unsigned mask) | |
45 | { | |
46 | struct ocfs2_inode_info *ocfs2_inode = OCFS2_I(inode); | |
47 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1fabe148 | 48 | handle_t *handle = NULL; |
ca4d147e HP |
49 | struct buffer_head *bh = NULL; |
50 | unsigned oldflags; | |
51 | int status; | |
52 | ||
53 | mutex_lock(&inode->i_mutex); | |
54 | ||
4bcec184 | 55 | status = ocfs2_meta_lock(inode, &bh, 1); |
ca4d147e HP |
56 | if (status < 0) { |
57 | mlog_errno(status); | |
58 | goto bail; | |
59 | } | |
60 | ||
61 | status = -EROFS; | |
62 | if (IS_RDONLY(inode)) | |
63 | goto bail_unlock; | |
64 | ||
65 | status = -EACCES; | |
3bd858ab | 66 | if (!is_owner_or_cap(inode)) |
ca4d147e HP |
67 | goto bail_unlock; |
68 | ||
69 | if (!S_ISDIR(inode->i_mode)) | |
70 | flags &= ~OCFS2_DIRSYNC_FL; | |
71 | ||
65eff9cc | 72 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
ca4d147e HP |
73 | if (IS_ERR(handle)) { |
74 | status = PTR_ERR(handle); | |
75 | mlog_errno(status); | |
76 | goto bail_unlock; | |
77 | } | |
78 | ||
79 | oldflags = ocfs2_inode->ip_attr; | |
80 | flags = flags & mask; | |
81 | flags |= oldflags & ~mask; | |
82 | ||
83 | /* | |
84 | * The IMMUTABLE and APPEND_ONLY flags can only be changed by | |
85 | * the relevant capability. | |
86 | */ | |
87 | status = -EPERM; | |
88 | if ((oldflags & OCFS2_IMMUTABLE_FL) || ((flags ^ oldflags) & | |
89 | (OCFS2_APPEND_FL | OCFS2_IMMUTABLE_FL))) { | |
90 | if (!capable(CAP_LINUX_IMMUTABLE)) | |
91 | goto bail_unlock; | |
92 | } | |
93 | ||
94 | ocfs2_inode->ip_attr = flags; | |
95 | ocfs2_set_inode_flags(inode); | |
96 | ||
97 | status = ocfs2_mark_inode_dirty(handle, inode, bh); | |
98 | if (status < 0) | |
99 | mlog_errno(status); | |
100 | ||
02dc1af4 | 101 | ocfs2_commit_trans(osb, handle); |
ca4d147e HP |
102 | bail_unlock: |
103 | ocfs2_meta_unlock(inode, 1); | |
104 | bail: | |
105 | mutex_unlock(&inode->i_mutex); | |
106 | ||
107 | if (bh) | |
108 | brelse(bh); | |
109 | ||
110 | mlog_exit(status); | |
111 | return status; | |
112 | } | |
113 | ||
114 | int ocfs2_ioctl(struct inode * inode, struct file * filp, | |
115 | unsigned int cmd, unsigned long arg) | |
116 | { | |
117 | unsigned int flags; | |
118 | int status; | |
b2580103 | 119 | struct ocfs2_space_resv sr; |
ca4d147e HP |
120 | |
121 | switch (cmd) { | |
122 | case OCFS2_IOC_GETFLAGS: | |
123 | status = ocfs2_get_inode_attr(inode, &flags); | |
124 | if (status < 0) | |
125 | return status; | |
126 | ||
127 | flags &= OCFS2_FL_VISIBLE; | |
128 | return put_user(flags, (int __user *) arg); | |
129 | case OCFS2_IOC_SETFLAGS: | |
130 | if (get_user(flags, (int __user *) arg)) | |
131 | return -EFAULT; | |
132 | ||
133 | return ocfs2_set_inode_attr(inode, flags, | |
134 | OCFS2_FL_MODIFIABLE); | |
b2580103 MF |
135 | case OCFS2_IOC_RESVSP: |
136 | case OCFS2_IOC_RESVSP64: | |
137 | case OCFS2_IOC_UNRESVSP: | |
138 | case OCFS2_IOC_UNRESVSP64: | |
139 | if (copy_from_user(&sr, (int __user *) arg, sizeof(sr))) | |
140 | return -EFAULT; | |
141 | ||
142 | return ocfs2_change_file_space(filp, cmd, &sr); | |
ca4d147e HP |
143 | default: |
144 | return -ENOTTY; | |
145 | } | |
146 | } | |
147 | ||
586d232b MF |
148 | #ifdef CONFIG_COMPAT |
149 | long ocfs2_compat_ioctl(struct file *file, unsigned cmd, unsigned long arg) | |
150 | { | |
151 | struct inode *inode = file->f_path.dentry->d_inode; | |
152 | int ret; | |
153 | ||
154 | switch (cmd) { | |
155 | case OCFS2_IOC32_GETFLAGS: | |
156 | cmd = OCFS2_IOC_GETFLAGS; | |
157 | break; | |
158 | case OCFS2_IOC32_SETFLAGS: | |
159 | cmd = OCFS2_IOC_SETFLAGS; | |
160 | break; | |
b2580103 MF |
161 | case OCFS2_IOC_RESVSP: |
162 | case OCFS2_IOC_RESVSP64: | |
163 | case OCFS2_IOC_UNRESVSP: | |
164 | case OCFS2_IOC_UNRESVSP64: | |
165 | break; | |
586d232b MF |
166 | default: |
167 | return -ENOIOCTLCMD; | |
168 | } | |
169 | ||
170 | lock_kernel(); | |
171 | ret = ocfs2_ioctl(inode, file, cmd, arg); | |
172 | unlock_kernel(); | |
173 | return ret; | |
174 | } | |
175 | #endif |