[linux-block.git] / fs / ocfs2 / ioctl.c

/*
 * linux/fs/ocfs2/ioctl.c
 *
 * Copyright (C) 2006 Herbert Poetzl
 * adapted from Remy Card's ext2/ioctl.c
 */

#include <linux/fs.h>
#include <linux/mount.h>

#define MLOG_MASK_PREFIX ML_INODE
#include <cluster/masklog.h>

#include "ocfs2.h"
#include "alloc.h"
#include "dlmglue.h"
#include "file.h"
#include "inode.h"
#include "journal.h"

#include "ocfs2_fs.h"
#include "ioctl.h"

#include <linux/ext2_fs.h>

static int ocfs2_get_inode_attr(struct inode *inode, unsigned *flags)
{
	int status;

	status = ocfs2_meta_lock(inode, NULL, 0);
	if (status < 0) {
		mlog_errno(status);
		return status;
	}
	ocfs2_get_inode_flags(OCFS2_I(inode));
	*flags = OCFS2_I(inode)->ip_attr;
	ocfs2_meta_unlock(inode, 0);

	mlog_exit(status);
	return status;
}

static int ocfs2_set_inode_attr(struct inode *inode, unsigned flags,
				unsigned mask)
{
	struct ocfs2_inode_info *ocfs2_inode = OCFS2_I(inode);
	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
	handle_t *handle = NULL;
	struct buffer_head *bh = NULL;
	unsigned oldflags;
	int status;

	mutex_lock(&inode->i_mutex);

	status = ocfs2_meta_lock(inode, &bh, 1);
	if (status < 0) {
		mlog_errno(status);
		goto bail;
	}

	status = -EROFS;
	if (IS_RDONLY(inode))
		goto bail_unlock;

	status = -EACCES;
	if (!is_owner_or_cap(inode))
		goto bail_unlock;

	if (!S_ISDIR(inode->i_mode))
		flags &= ~OCFS2_DIRSYNC_FL;

	handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
	if (IS_ERR(handle)) {
		status = PTR_ERR(handle);
		mlog_errno(status);
		goto bail_unlock;
	}

	oldflags = ocfs2_inode->ip_attr;
	flags = flags & mask;
	flags |= oldflags & ~mask;

	/*
	 * The IMMUTABLE and APPEND_ONLY flags can only be changed by
	 * the relevant capability.
	 */
	status = -EPERM;
	if ((oldflags & OCFS2_IMMUTABLE_FL) || ((flags ^ oldflags) &
		(OCFS2_APPEND_FL | OCFS2_IMMUTABLE_FL))) {
		if (!capable(CAP_LINUX_IMMUTABLE))
			goto bail_unlock;
	}

	ocfs2_inode->ip_attr = flags;
	ocfs2_set_inode_flags(inode);

	status = ocfs2_mark_inode_dirty(handle, inode, bh);
	if (status < 0)
		mlog_errno(status);

	ocfs2_commit_trans(osb, handle);
bail_unlock:
	ocfs2_meta_unlock(inode, 1);
bail:
	mutex_unlock(&inode->i_mutex);

	if (bh)
		brelse(bh);

	mlog_exit(status);
	return status;
}

int ocfs2_ioctl(struct inode * inode, struct file * filp,
	unsigned int cmd, unsigned long arg)
{
	unsigned int flags;
	int status;
	struct ocfs2_space_resv sr;

	switch (cmd) {
	case OCFS2_IOC_GETFLAGS:
		status = ocfs2_get_inode_attr(inode, &flags);
		if (status < 0)
			return status;

		flags &= OCFS2_FL_VISIBLE;
		return put_user(flags, (int __user *) arg);
	case OCFS2_IOC_SETFLAGS:
		if (get_user(flags, (int __user *) arg))
			return -EFAULT;

		return ocfs2_set_inode_attr(inode, flags,
			OCFS2_FL_MODIFIABLE);
	case OCFS2_IOC_RESVSP:
	case OCFS2_IOC_RESVSP64:
	case OCFS2_IOC_UNRESVSP:
	case OCFS2_IOC_UNRESVSP64:
		if (copy_from_user(&sr, (int __user *) arg, sizeof(sr)))
			return -EFAULT;

		return ocfs2_change_file_space(filp, cmd, &sr);
	default:
		return -ENOTTY;
	}
}

#ifdef CONFIG_COMPAT
long ocfs2_compat_ioctl(struct file *file, unsigned cmd, unsigned long arg)
{
	struct inode *inode = file->f_path.dentry->d_inode;
	int ret;

	switch (cmd) {
	case OCFS2_IOC32_GETFLAGS:
		cmd = OCFS2_IOC_GETFLAGS;
		break;
	case OCFS2_IOC32_SETFLAGS:
		cmd = OCFS2_IOC_SETFLAGS;
		break;
	case OCFS2_IOC_RESVSP:
	case OCFS2_IOC_RESVSP64:
	case OCFS2_IOC_UNRESVSP:
	case OCFS2_IOC_UNRESVSP64:
		break;
	default:
		return -ENOIOCTLCMD;
	}

	lock_kernel();
	ret = ocfs2_ioctl(inode, file, cmd, arg);
	unlock_kernel();
	return ret;
}
#endif
Commit	Line	Data
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"
2d562518 AB	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