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

#include <linux/fs.h>
#include <linux/ctype.h>
#include <linux/capability.h>
#include <linux/mount.h>
#include <linux/time.h>
#include <linux/sched.h>
#include <linux/blkdev.h>
#include <asm/current.h>
#include <linux/uaccess.h>

#include "jfs_filsys.h"
#include "jfs_debug.h"
#include "jfs_incore.h"
#include "jfs_dinode.h"
#include "jfs_inode.h"
#include "jfs_dmap.h"
#include "jfs_discard.h"

static struct {
	long jfs_flag;
	long ext2_flag;
} jfs_map[] = {
	{JFS_NOATIME_FL,	FS_NOATIME_FL},
	{JFS_DIRSYNC_FL,	FS_DIRSYNC_FL},
	{JFS_SYNC_FL,		FS_SYNC_FL},
	{JFS_SECRM_FL,		FS_SECRM_FL},
	{JFS_UNRM_FL,		FS_UNRM_FL},
	{JFS_APPEND_FL,		FS_APPEND_FL},
	{JFS_IMMUTABLE_FL,	FS_IMMUTABLE_FL},
	{0, 0},
};

static long jfs_map_ext2(unsigned long flags, int from)
{
	int index=0;
	long mapped=0;

	while (jfs_map[index].jfs_flag) {
		if (from) {
			if (jfs_map[index].ext2_flag & flags)
				mapped |= jfs_map[index].jfs_flag;
		} else {
			if (jfs_map[index].jfs_flag & flags)
				mapped |= jfs_map[index].ext2_flag;
		}
		index++;
	}
	return mapped;
}


long jfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
	struct inode *inode = file_inode(filp);
	struct jfs_inode_info *jfs_inode = JFS_IP(inode);
	unsigned int flags;

	switch (cmd) {
	case JFS_IOC_GETFLAGS:
		jfs_get_inode_flags(jfs_inode);
		flags = jfs_inode->mode2 & JFS_FL_USER_VISIBLE;
		flags = jfs_map_ext2(flags, 0);
		return put_user(flags, (int __user *) arg);
	case JFS_IOC_SETFLAGS: {
		unsigned int oldflags;
		int err;

		err = mnt_want_write_file(filp);
		if (err)
			return err;

		if (!inode_owner_or_capable(inode)) {
			err = -EACCES;
			goto setflags_out;
		}
		if (get_user(flags, (int __user *) arg)) {
			err = -EFAULT;
			goto setflags_out;
		}

		flags = jfs_map_ext2(flags, 1);
		if (!S_ISDIR(inode->i_mode))
			flags &= ~JFS_DIRSYNC_FL;

		/* Is it quota file? Do not allow user to mess with it */
		if (IS_NOQUOTA(inode)) {
			err = -EPERM;
			goto setflags_out;
		}

		/* Lock against other parallel changes of flags */
		inode_lock(inode);

		jfs_get_inode_flags(jfs_inode);
		oldflags = jfs_inode->mode2;

		/*
		 * The IMMUTABLE and APPEND_ONLY flags can only be changed by
		 * the relevant capability.
		 */
		if ((oldflags & JFS_IMMUTABLE_FL) ||
			((flags ^ oldflags) &
			(JFS_APPEND_FL | JFS_IMMUTABLE_FL))) {
			if (!capable(CAP_LINUX_IMMUTABLE)) {
				inode_unlock(inode);
				err = -EPERM;
				goto setflags_out;
			}
		}

		flags = flags & JFS_FL_USER_MODIFIABLE;
		flags |= oldflags & ~JFS_FL_USER_MODIFIABLE;
		jfs_inode->mode2 = flags;

		jfs_set_inode_flags(inode);
		inode_unlock(inode);
		inode->i_ctime = current_time(inode);
		mark_inode_dirty(inode);
setflags_out:
		mnt_drop_write_file(filp);
		return err;
	}

	case FITRIM:
	{
		struct super_block *sb = inode->i_sb;
		struct request_queue *q = bdev_get_queue(sb->s_bdev);
		struct fstrim_range range;
		s64 ret = 0;

		if (!capable(CAP_SYS_ADMIN))
			return -EPERM;

		if (!blk_queue_discard(q)) {
			jfs_warn("FITRIM not supported on device");
			return -EOPNOTSUPP;
		}

		if (copy_from_user(&range, (struct fstrim_range __user *)arg,
		    sizeof(range)))
			return -EFAULT;

		range.minlen = max_t(unsigned int, range.minlen,
			q->limits.discard_granularity);

		ret = jfs_ioc_trim(inode, &range);
		if (ret < 0)
			return ret;

		if (copy_to_user((struct fstrim_range __user *)arg, &range,
		    sizeof(range)))
			return -EFAULT;

		return 0;
	}

	default:
		return -ENOTTY;
	}
}

#ifdef CONFIG_COMPAT
long jfs_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
	/* While these ioctl numbers defined with 'long' and have different
	 * numbers than the 64bit ABI,
	 * the actual implementation only deals with ints and is compatible.
	 */
	switch (cmd) {
	case JFS_IOC_GETFLAGS32:
		cmd = JFS_IOC_GETFLAGS;
		break;
	case JFS_IOC_SETFLAGS32:
		cmd = JFS_IOC_SETFLAGS;
		break;
	}
	return jfs_ioctl(filp, cmd, arg);
}
#endif
d='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Daniel Vetter &lt;daniel.vetter@ffwll.ch&gt;</td><td class='right'>2017-01-12 17:15:56 +0100</td></tr>
<tr><th>committer</th><td>Daniel Vetter &lt;daniel.vetter@ffwll.ch&gt;</td><td class='right'>2017-01-30 10:17:32 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/soc/tegra/pmc.h?h=nds-private-remove&amp;id=e6e7b48b295afa5a5ab440de0a94d9ad8b3ce2d0'>e6e7b48b295afa5a5ab440de0a94d9ad8b3ce2d0</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/soc/tegra/pmc.h?id=e6e7b48b295afa5a5ab440de0a94d9ad8b3ce2d0'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?h=nds-private-remove&amp;id=e6e7b48b295afa5a5ab440de0a94d9ad8b3ce2d0'>77cadb6d8aad1b52c34e4afa8c9deef603bbe2ed</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include/soc/tegra/pmc.h?h=nds-private-remove&amp;id=e6e7b48b295afa5a5ab440de0a94d9ad8b3ce2d0'>include/soc/tegra/pmc.h</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/soc/tegra/pmc.h?h=nds-private-remove&amp;id=4e5b54f127426c82dc2816340c26d951a5bb3429'>4e5b54f127426c82dc2816340c26d951a5bb3429</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/soc/tegra/pmc.h?h=nds-private-remove&amp;id=e6e7b48b295afa5a5ab440de0a94d9ad8b3ce2d0&amp;id2=4e5b54f127426c82dc2816340c26d951a5bb3429'>diff</a>)</td></tr></table>
<div class='commit-subject'>drm: Don't race connector registration</div><div class='commit-msg'>I was under the misconception that the sysfs dev stuff can be fully
set up, and then registered all in one step with device_add. That's
true for properties and property groups, but not for parents and child
devices. Those must be fully registered before you can register a
child.

Add a bit of tracking to make sure that asynchronous mst connector
hotplugging gets this right. For consistency we rely upon the implicit
barriers of the connector-&gt;mutex, which is taken anyway, to ensure
that at least either the connector or device registration call will
work out.

Mildly tested since I can't reliably reproduce this on my mst box
here.

Reported-by: Dave Hansen &lt;dave.hansen@intel.com&gt;
Cc: Dave Hansen &lt;dave.hansen@intel.com&gt;
Acked-by: Chris Wilson &lt;chris@chris-wilson.co.uk&gt;
Cc: Chris Wilson &lt;chris@chris-wilson.co.uk&gt;
Signed-off-by: Daniel Vetter &lt;daniel.vetter@intel.com&gt;
Link: http://patchwork.freedesktop.org/patch/msgid/1484237756-2720-1-git-send-email-daniel.vetter@ffwll.ch
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=e6e7b48b295afa5a5ab440de0a94d9ad8b3ce2d0'>Diffstat</a> (limited to 'include/soc/tegra/pmc.h')</div><table summary='diffstat' class='diffstat'>