52 lines
1.3 KiB
C
52 lines
1.3 KiB
C
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/*
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* linux/fs/ext2/ioctl.c
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*
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* Copyright (C) 1993, 1994 Remy Card (card@masi.ibp.fr)
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* Laboratoire MASI - Institut Blaise Pascal
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* Universite Pierre et Marie Curie (Paris VI)
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*/
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#include <asm/segment.h>
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#include <linux/errno.h>
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#include <linux/fs.h>
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#include <linux/ext2_fs.h>
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#include <linux/ioctl.h>
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#include <linux/sched.h>
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int ext2_ioctl (struct inode * inode, struct file * filp, unsigned int cmd,
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unsigned long arg)
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{
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ext2_debug ("cmd = %u, arg = %lu\n", cmd, arg);
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switch (cmd) {
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case EXT2_IOC_GETFLAGS:
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put_fs_long (inode->u.ext2_i.i_flags, (long *) arg);
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return 0;
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case EXT2_IOC_SETFLAGS:
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if ((current->euid != inode->i_uid) && !suser())
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return -EPERM;
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if (IS_RDONLY(inode))
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return -EROFS;
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inode->u.ext2_i.i_flags = get_fs_long ((long *) arg);
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inode->i_ctime = CURRENT_TIME;
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inode->i_dirt = 1;
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return 0;
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case EXT2_IOC_GETVERSION:
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put_fs_long (inode->u.ext2_i.i_version, (long *) arg);
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return 0;
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case EXT2_IOC_SETVERSION:
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if ((current->euid != inode->i_uid) && !suser())
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return -EPERM;
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if (IS_RDONLY(inode))
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return -EROFS;
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inode->u.ext2_i.i_version = get_fs_long ((long *) arg);
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inode->i_ctime = CURRENT_TIME;
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inode->i_dirt = 1;
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return 0;
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default:
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return -EINVAL;
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}
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}
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