/*
 * Pioctl operations for Coda.
 * Original version: (C) 1996 Peter Braam
 * Rewritten for Linux 2.1: (C) 1997 Carnegie Mellon University
 *
 * Carnegie Mellon encourages users of this code to contribute improvements
 * to the Coda project. Contact Peter Braam <coda@cs.cmu.edu>.
 */

#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/time.h>
#include <linux/fs.h>
#include <linux/stat.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/namei.h>
#include <linux/module.h>
#include <linux/uaccess.h>

#include <linux/coda.h>
#include <linux/coda_psdev.h>

#include "coda_linux.h"

/* pioctl ops */
static int coda_ioctl_permission(struct inode *inode, int mask);
static long coda_pioctl(struct file *filp, unsigned int cmd,
			unsigned long user_data);

/* exported from this file */
const struct inode_operations coda_ioctl_inode_operations = {
	.permission	= coda_ioctl_permission,
	.setattr	= coda_setattr,
};

const struct file_operations coda_ioctl_operations = {
	.unlocked_ioctl	= coda_pioctl,
	.llseek		= noop_llseek,
};

/* the coda pioctl inode ops */
static int coda_ioctl_permission(struct inode *inode, int mask)
{
	return (mask & MAY_EXEC) ? -EACCES : 0;
}

static long coda_pioctl(struct file *filp, unsigned int cmd,
			unsigned long user_data)
{
	struct path path;
	int error;
	struct PioctlData data;
	struct inode *inode = file_inode(filp);
	struct inode *target_inode = NULL;
	struct coda_inode_info *cnp;

	/* get the Pioctl data arguments from user space */
	if (copy_from_user(&data, (void __user *)user_data, sizeof(data)))
		return -EINVAL;

	/*
	 * Look up the pathname. Note that the pathname is in
	 * user memory, and namei takes care of this
	 */
	if (data.follow)
		error = user_path(data.path, &path);
	else
		error = user_lpath(data.path, &path);

	if (error)
		return error;

	target_inode = d_inode(path.dentry);

	/* return if it is not a Coda inode */
	if (target_inode->i_sb != inode->i_sb) {
		error = -EINVAL;
		goto out;
	}

	/* now proceed to make the upcall */
	cnp = ITOC(target_inode);

	error = venus_pioctl(inode->i_sb, &(cnp->c_fid), cmd, &data);
out:
	path_put(&path);
	return error;
}
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=ca92e6c7e6329029d7188487a5c32e86ef471977'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/fs?id=ca92e6c7e6329029d7188487a5c32e86ef471977'>fs</a>/<a href='/cgit.cgi/linux/net-next.git/commit/fs/xfs?id=ca92e6c7e6329029d7188487a5c32e86ef471977'>xfs</a>/<a href='/cgit.cgi/linux/net-next.git/commit/fs/xfs/libxfs?id=ca92e6c7e6329029d7188487a5c32e86ef471977'>libxfs</a>/<a href='/cgit.cgi/linux/net-next.git/commit/fs/xfs/libxfs/xfs_attr_remote.c?id=ca92e6c7e6329029d7188487a5c32e86ef471977'>xfs_attr_remote.c</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='ca92e6c7e6329029d7188487a5c32e86ef471977'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='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>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-18 11:13:41 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-18 11:13:41 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/fs/xfs/libxfs/xfs_attr_remote.c?id=ca92e6c7e6329029d7188487a5c32e86ef471977'>ca92e6c7e6329029d7188487a5c32e86ef471977</a> (<a href='/cgit.cgi/linux/net-next.git/patch/fs/xfs/libxfs/xfs_attr_remote.c?id=ca92e6c7e6329029d7188487a5c32e86ef471977'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=ca92e6c7e6329029d7188487a5c32e86ef471977'>704fb5c2ca533cdb569826522eed0dbbcf31f316</a> /<a href='/cgit.cgi/linux/net-next.git/tree/fs/xfs/libxfs/xfs_attr_remote.c?id=ca92e6c7e6329029d7188487a5c32e86ef471977'>fs/xfs/libxfs/xfs_attr_remote.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/fs/xfs/libxfs/xfs_attr_remote.c?id=0b75f821ec8be459dd4dec77be39595d989d77ac'>0b75f821ec8be459dd4dec77be39595d989d77ac</a> (<a href='/cgit.cgi/linux/net-next.git/diff/fs/xfs/libxfs/xfs_attr_remote.c?id=ca92e6c7e6329029d7188487a5c32e86ef471977&amp;id2=0b75f821ec8be459dd4dec77be39595d989d77ac'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/fs/xfs/libxfs/xfs_attr_remote.c?id=4205e4786d0b9fc3b4fec7b1910cf645a0468307'>4205e4786d0b9fc3b4fec7b1910cf645a0468307</a> (<a href='/cgit.cgi/linux/net-next.git/diff/fs/xfs/libxfs/xfs_attr_remote.c?id=ca92e6c7e6329029d7188487a5c32e86ef471977&amp;id2=4205e4786d0b9fc3b4fec7b1910cf645a0468307'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge branch 'smp-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip</div><div class='commit-msg'>Pull SMP hotplug update from Thomas Gleixner:
 "This contains a trivial typo fix and an extension to the core code for
  dynamically allocating states in the prepare stage.

  The extension is necessary right now because we need a proper way to
  unbreak LTTNG, which iscurrently non functional due to the removal of
  the notifiers. Surely it's out of tree, but it's widely used by
  distros.

  The simple solution would have been to reserve a state for LTTNG, but
  I'm not fond about unused crap in the kernel and the dynamic range,
  which we admittedly should have done right away, allows us to remove
  quite some of the hardcoded states, i.e. those which have no ordering
  requirements. So doing the right thing now is better than having an
  smaller intermediate solution which needs to be reworked anyway"

* 'smp-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  cpu/hotplug: Provide dynamic range for prepare stage
  perf/x86/amd/ibs: Fix typo after cleanup state names in cpu/hotplug
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=ca92e6c7e6329029d7188487a5c32e86ef471977'>Diffstat</a> (limited to 'fs/xfs/libxfs/xfs_attr_remote.c')</div><table summary='diffstat' class='diffstat'>