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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /fs/ext2/ioctl.c
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'fs/ext2/ioctl.c')
-rw-r--r--fs/ext2/ioctl.c81
1 files changed, 81 insertions, 0 deletions
diff --git a/fs/ext2/ioctl.c b/fs/ext2/ioctl.c
new file mode 100644
index 000000000000..709d8676b962
--- /dev/null
+++ b/fs/ext2/ioctl.c
@@ -0,0 +1,81 @@
1/*
2 * linux/fs/ext2/ioctl.c
3 *
4 * Copyright (C) 1993, 1994, 1995
5 * Remy Card (card@masi.ibp.fr)
6 * Laboratoire MASI - Institut Blaise Pascal
7 * Universite Pierre et Marie Curie (Paris VI)
8 */
9
10#include "ext2.h"
11#include <linux/time.h>
12#include <linux/sched.h>
13#include <asm/current.h>
14#include <asm/uaccess.h>
15
16
17int ext2_ioctl (struct inode * inode, struct file * filp, unsigned int cmd,
18 unsigned long arg)
19{
20 struct ext2_inode_info *ei = EXT2_I(inode);
21 unsigned int flags;
22
23 ext2_debug ("cmd = %u, arg = %lu\n", cmd, arg);
24
25 switch (cmd) {
26 case EXT2_IOC_GETFLAGS:
27 flags = ei->i_flags & EXT2_FL_USER_VISIBLE;
28 return put_user(flags, (int __user *) arg);
29 case EXT2_IOC_SETFLAGS: {
30 unsigned int oldflags;
31
32 if (IS_RDONLY(inode))
33 return -EROFS;
34
35 if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
36 return -EACCES;
37
38 if (get_user(flags, (int __user *) arg))
39 return -EFAULT;
40
41 if (!S_ISDIR(inode->i_mode))
42 flags &= ~EXT2_DIRSYNC_FL;
43
44 oldflags = ei->i_flags;
45
46 /*
47 * The IMMUTABLE and APPEND_ONLY flags can only be changed by
48 * the relevant capability.
49 *
50 * This test looks nicer. Thanks to Pauline Middelink
51 */
52 if ((flags ^ oldflags) & (EXT2_APPEND_FL | EXT2_IMMUTABLE_FL)) {
53 if (!capable(CAP_LINUX_IMMUTABLE))
54 return -EPERM;
55 }
56
57 flags = flags & EXT2_FL_USER_MODIFIABLE;
58 flags |= oldflags & ~EXT2_FL_USER_MODIFIABLE;
59 ei->i_flags = flags;
60
61 ext2_set_inode_flags(inode);
62 inode->i_ctime = CURRENT_TIME_SEC;
63 mark_inode_dirty(inode);
64 return 0;
65 }
66 case EXT2_IOC_GETVERSION:
67 return put_user(inode->i_generation, (int __user *) arg);
68 case EXT2_IOC_SETVERSION:
69 if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
70 return -EPERM;
71 if (IS_RDONLY(inode))
72 return -EROFS;
73 if (get_user(inode->i_generation, (int __user *) arg))
74 return -EFAULT;
75 inode->i_ctime = CURRENT_TIME_SEC;
76 mark_inode_dirty(inode);
77 return 0;
78 default:
79 return -ENOTTY;
80 }
81}