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[/] [or1k/] [trunk/] [rc203soc/] [sw/] [uClinux/] [fs/] [ext2/] [ioctl.c] - Blame information for rev 1777

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/*
 * linux/fs/ext2/ioctl.c
 *
 * Copyright (C) 1993, 1994, 1995
 * Remy Card (card@masi.ibp.fr)
 * Laboratoire MASI - Institut Blaise Pascal
 * Universite Pierre et Marie Curie (Paris VI)
 */
 
#include <asm/segment.h>
 
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/ext2_fs.h>
#include <linux/ioctl.h>
#include <linux/sched.h>
#include <linux/mm.h>
 
int ext2_ioctl (struct inode * inode, struct file * filp, unsigned int cmd,
                unsigned long arg)
{
        int err;
        unsigned long flags;
 
        ext2_debug ("cmd = %u, arg = %lu\n", cmd, arg);
 
        switch (cmd) {
        case EXT2_IOC_GETFLAGS:
                err = verify_area(VERIFY_WRITE, (int *) arg, sizeof(int));
                if (err)
                        return err;
                put_user(inode->u.ext2_i.i_flags, (int *) arg);
                return 0;
        case EXT2_IOC_SETFLAGS:
                err = verify_area(VERIFY_READ, (int *) arg, sizeof(int));
                if (err)
                        return err;
                flags = get_user((int *) arg);
                /*
                 * The IMMUTABLE and APPEND_ONLY flags can only be changed by
                 * the super user when the security level is zero.
                 */
                if ((flags & (EXT2_APPEND_FL | EXT2_IMMUTABLE_FL)) ^
                    (inode->u.ext2_i.i_flags &
                     (EXT2_APPEND_FL | EXT2_IMMUTABLE_FL))) {
                        /* This test looks nicer. Thanks to Pauline Middelink */
                        if (!fsuser() || securelevel > 0)
                                return -EPERM;
                } else
                        if ((current->fsuid != inode->i_uid) && !fsuser())
                                return -EPERM;
                if (IS_RDONLY(inode))
                        return -EROFS;
                inode->u.ext2_i.i_flags = flags;
                if (flags & EXT2_APPEND_FL)
                        inode->i_flags |= S_APPEND;
                else
                        inode->i_flags &= ~S_APPEND;
                if (flags & EXT2_IMMUTABLE_FL)
                        inode->i_flags |= S_IMMUTABLE;
                else
                        inode->i_flags &= ~S_IMMUTABLE;
                if (flags & EXT2_NOATIME_FL)
                        inode->i_flags |= MS_NOATIME;
                else
                        inode->i_flags &= ~MS_NOATIME;
                inode->i_ctime = CURRENT_TIME;
                inode->i_dirt = 1;
                return 0;
        case EXT2_IOC_GETVERSION:
                err = verify_area(VERIFY_WRITE, (int *) arg, sizeof(int));
                if (err)
                        return err;
                put_user(inode->u.ext2_i.i_version, (int *) arg);
                return 0;
        case EXT2_IOC_SETVERSION:
                if ((current->fsuid != inode->i_uid) && !fsuser())
                        return -EPERM;
                if (IS_RDONLY(inode))
                        return -EROFS;
                err = verify_area(VERIFY_READ, (int *) arg, sizeof(int));
                if (err)
                        return err;
                inode->u.ext2_i.i_version = get_user((int *) arg);
                inode->i_ctime = CURRENT_TIME;
                inode->i_dirt = 1;
                return 0;
        default:
                return -ENOTTY;
        }
}

Line No.	Rev	Author	Line
1	1628	jcastillo	`/*`
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 <asm/segment.h>`
11
12			`#include <linux/errno.h>`
13			`#include <linux/fs.h>`
14			`#include <linux/ext2_fs.h>`
15			`#include <linux/ioctl.h>`
16			`#include <linux/sched.h>`
17			`#include <linux/mm.h>`
18
19			`int ext2_ioctl (struct inode * inode, struct file * filp, unsigned int cmd,`
20			`unsigned long arg)`
21			`{`
22			`int err;`
23			`unsigned long flags;`
24
25			`ext2_debug ("cmd = %u, arg = %lu\n", cmd, arg);`
26
27			`switch (cmd) {`
28			`case EXT2_IOC_GETFLAGS:`
29			`err = verify_area(VERIFY_WRITE, (int *) arg, sizeof(int));`
30			`if (err)`
31			`return err;`
32			`put_user(inode->u.ext2_i.i_flags, (int *) arg);`
33			`return 0;`
34			`case EXT2_IOC_SETFLAGS:`
35			`err = verify_area(VERIFY_READ, (int *) arg, sizeof(int));`
36			`if (err)`
37			`return err;`
38			`flags = get_user((int *) arg);`
39			`/*`
40			`* The IMMUTABLE and APPEND_ONLY flags can only be changed by`
41			`* the super user when the security level is zero.`
42			`*/`
43			`if ((flags & (EXT2_APPEND_FL \| EXT2_IMMUTABLE_FL)) ^`
44			`(inode->u.ext2_i.i_flags &`
45			`(EXT2_APPEND_FL \| EXT2_IMMUTABLE_FL))) {`
46			`/* This test looks nicer. Thanks to Pauline Middelink */`
47			`if (!fsuser() \|\| securelevel > 0)`
48			`return -EPERM;`
49			`} else`
50			`if ((current->fsuid != inode->i_uid) && !fsuser())`
51			`return -EPERM;`
52			`if (IS_RDONLY(inode))`
53			`return -EROFS;`
54			`inode->u.ext2_i.i_flags = flags;`
55			`if (flags & EXT2_APPEND_FL)`
56			`inode->i_flags \|= S_APPEND;`
57			`else`
58			`inode->i_flags &= ~S_APPEND;`
59			`if (flags & EXT2_IMMUTABLE_FL)`
60			`inode->i_flags \|= S_IMMUTABLE;`
61			`else`
62			`inode->i_flags &= ~S_IMMUTABLE;`
63			`if (flags & EXT2_NOATIME_FL)`
64			`inode->i_flags \|= MS_NOATIME;`
65			`else`
66			`inode->i_flags &= ~MS_NOATIME;`
67			`inode->i_ctime = CURRENT_TIME;`
68			`inode->i_dirt = 1;`
69			`return 0;`
70			`case EXT2_IOC_GETVERSION:`
71			`err = verify_area(VERIFY_WRITE, (int *) arg, sizeof(int));`
72			`if (err)`
73			`return err;`
74			`put_user(inode->u.ext2_i.i_version, (int *) arg);`
75			`return 0;`
76			`case EXT2_IOC_SETVERSION:`
77			`if ((current->fsuid != inode->i_uid) && !fsuser())`
78			`return -EPERM;`
79			`if (IS_RDONLY(inode))`
80			`return -EROFS;`
81			`err = verify_area(VERIFY_READ, (int *) arg, sizeof(int));`
82			`if (err)`
83			`return err;`
84			`inode->u.ext2_i.i_version = get_user((int *) arg);`
85			`inode->i_ctime = CURRENT_TIME;`
86			`inode->i_dirt = 1;`
87			`return 0;`
88			`default:`
89			`return -ENOTTY;`
90			`}`
91			`}`

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[/] [or1k/] [trunk/] [rc203soc/] [sw/] [uClinux/] [fs/] [ext2/] [ioctl.c] - Blame information for rev 1777