/*
 *  linux/fs/9p/vfs_dentry.c
 *
 * This file contians vfs dentry ops for the 9P2000 protocol.
 *
 *  Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
 *  Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2
 *  as published by the Free Software Foundation.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to:
 *  Free Software Foundation
 *  51 Franklin Street, Fifth Floor
 *  Boston, MA  02111-1301  USA
 *
 */

#include <linux/module.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/file.h>
#include <linux/pagemap.h>
#include <linux/stat.h>
#include <linux/string.h>
#include <linux/inet.h>
#include <linux/namei.h>
#include <linux/idr.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <net/9p/9p.h>
#include <net/9p/client.h>

#include "v9fs.h"
#include "v9fs_vfs.h"
#include "fid.h"

/**
 * v9fs_cached_dentry_delete - called when dentry refcount equals 0
 * @dentry:  dentry in question
 *
 */
static int v9fs_cached_dentry_delete(const struct dentry *dentry)
{
	p9_debug(P9_DEBUG_VFS, " dentry: %pd (%p)\n",
		 dentry, dentry);

	/* Don't cache negative dentries */
	if (d_really_is_negative(dentry))
		return 1;
	return 0;
}

/**
 * v9fs_dentry_release - called when dentry is going to be freed
 * @dentry:  dentry that is being release
 *
 */

static void v9fs_dentry_release(struct dentry *dentry)
{
	struct hlist_node *p, *n;
	p9_debug(P9_DEBUG_VFS, " dentry: %pd (%p)\n",
		 dentry, dentry);
	hlist_for_each_safe(p, n, (struct hlist_head *)&dentry->d_fsdata)
		p9_client_clunk(hlist_entry(p, struct p9_fid, dlist));
	dentry->d_fsdata = NULL;
}

static int v9fs_lookup_revalidate(struct dentry *dentry, unsigned int flags)
{
	struct p9_fid *fid;
	struct inode *inode;
	struct v9fs_inode *v9inode;

	if (flags & LOOKUP_RCU)
		return -ECHILD;

	inode = d_inode(dentry);
	if (!inode)
		goto out_valid;

	v9inode = V9FS_I(inode);
	if (v9inode->cache_validity & V9FS_INO_INVALID_ATTR) {
		int retval;
		struct v9fs_session_info *v9ses;
		fid = v9fs_fid_lookup(dentry);
		if (IS_ERR(fid))
			return PTR_ERR(fid);

		v9ses = v9fs_inode2v9ses(inode);
		if (v9fs_proto_dotl(v9ses))
			retval = v9fs_refresh_inode_dotl(fid, inode);
		else
			retval = v9fs_refresh_inode(fid, inode);
		if (retval == -ENOENT)
			return 0;
		if (retval < 0)
			return retval;
	}
out_valid:
	return 1;
}

const struct dentry_operations v9fs_cached_dentry_operations = {
	.d_revalidate = v9fs_lookup_revalidate,
	.d_weak_revalidate = v9fs_lookup_revalidate,
	.d_delete = v9fs_cached_dentry_delete,
	.d_release = v9fs_dentry_release,
};

const struct dentry_operations v9fs_dentry_operations = {
	.d_delete = always_delete_dentry,
	.d_release = v9fs_dentry_release,
};
ux/net-next.git/commit/sound/soc?h=nds-private-remove&amp;id=33e962c8871f015f5c8978384553dddcf5b81b22'>soc</a>/<a href='/cgit.cgi/linux/net-next.git/commit/sound/soc/intel?h=nds-private-remove&amp;id=33e962c8871f015f5c8978384553dddcf5b81b22'>intel</a>/<a href='/cgit.cgi/linux/net-next.git/commit/sound/soc/intel/atom?h=nds-private-remove&amp;id=33e962c8871f015f5c8978384553dddcf5b81b22'>atom</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='h' value='nds-private-remove'/><input type='hidden' name='id' value='33e962c8871f015f5c8978384553dddcf5b81b22'/><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>Stanislaw Gruszka &lt;sgruszka@redhat.com&gt;</td><td class='right'>2017-01-29 12:40:52 +0100</td></tr>
<tr><th>committer</th><td>Kalle Valo &lt;kvalo@codeaurora.org&gt;</td><td class='right'>2017-01-31 09:08:52 +0200</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/soc/intel/atom?h=nds-private-remove&amp;id=33e962c8871f015f5c8978384553dddcf5b81b22'>33e962c8871f015f5c8978384553dddcf5b81b22</a> (<a href='/cgit.cgi/linux/net-next.git/patch/sound/soc/intel/atom?id=33e962c8871f015f5c8978384553dddcf5b81b22'>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=33e962c8871f015f5c8978384553dddcf5b81b22'>43aff96c2ee21d9e0fa2018457778a4de52053cd</a> /<a href='/cgit.cgi/linux/net-next.git/tree/sound/soc/intel/atom?h=nds-private-remove&amp;id=33e962c8871f015f5c8978384553dddcf5b81b22'>sound/soc/intel/atom</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/soc/intel/atom?h=nds-private-remove&amp;id=575ddce0507789bf9830d089557d2199d2f91865'>575ddce0507789bf9830d089557d2199d2f91865</a> (<a href='/cgit.cgi/linux/net-next.git/diff/sound/soc/intel/atom?h=nds-private-remove&amp;id=33e962c8871f015f5c8978384553dddcf5b81b22&amp;id2=575ddce0507789bf9830d089557d2199d2f91865'>diff</a>)</td></tr></table>
<div class='commit-subject'>rt2x00: fix clk_get call</div><div class='commit-msg'>clk_get() takes two arguments and might return ERR_PTR(), so we
have to nullify pointer on that case, to do not break further call
to clk_get_rate().

Reported-by: Felix Fietkau &lt;nbd@nbd.name&gt;
Fixes: 34db70b92fae ("rt2x00: add copy of clk for soc devices")
Signed-off-by: Stanislaw Gruszka &lt;sgruszka@redhat.com&gt;
Signed-off-by: Kalle Valo &lt;kvalo@codeaurora.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=33e962c8871f015f5c8978384553dddcf5b81b22'>Diffstat</a> (limited to 'sound/soc/intel/atom')</div><table summary='diffstat' class='diffstat'>