/*
 * (C) 2001 Clemson University and The University of Chicago
 *
 * See COPYING in top-level directory.
 */

/*
 *  Implementation of dentry (directory cache) functions.
 */

#include "protocol.h"
#include "orangefs-kernel.h"

/* Returns 1 if dentry can still be trusted, else 0. */
static int orangefs_revalidate_lookup(struct dentry *dentry)
{
	struct dentry *parent_dentry = dget_parent(dentry);
	struct inode *parent_inode = parent_dentry->d_inode;
	struct orangefs_inode_s *parent = ORANGEFS_I(parent_inode);
	struct inode *inode = dentry->d_inode;
	struct orangefs_kernel_op_s *new_op;
	int ret = 0;
	int err = 0;

	gossip_debug(GOSSIP_DCACHE_DEBUG, "%s: attempting lookup.\n", __func__);

	new_op = op_alloc(ORANGEFS_VFS_OP_LOOKUP);
	if (!new_op)
		goto out_put_parent;

	new_op->upcall.req.lookup.sym_follow = ORANGEFS_LOOKUP_LINK_NO_FOLLOW;
	new_op->upcall.req.lookup.parent_refn = parent->refn;
	strncpy(new_op->upcall.req.lookup.d_name,
		dentry->d_name.name,
		ORANGEFS_NAME_MAX);

	gossip_debug(GOSSIP_DCACHE_DEBUG,
		     "%s:%s:%d interrupt flag [%d]\n",
		     __FILE__,
		     __func__,
		     __LINE__,
		     get_interruptible_flag(parent_inode));

	err = service_operation(new_op, "orangefs_lookup",
			get_interruptible_flag(parent_inode));

	/* Positive dentry: reject if error or not the same inode. */
	if (inode) {
		if (err) {
			gossip_debug(GOSSIP_DCACHE_DEBUG,
			    "%s:%s:%d lookup failure.\n",
			    __FILE__, __func__, __LINE__);
			goto out_drop;
		}
		if (!match_handle(new_op->downcall.resp.lookup.refn.khandle,
		    inode)) {
			gossip_debug(GOSSIP_DCACHE_DEBUG,
			    "%s:%s:%d no match.\n",
			    __FILE__, __func__, __LINE__);
			goto out_drop;
		}

	/* Negative dentry: reject if success or error other than ENOENT. */
	} else {
		gossip_debug(GOSSIP_DCACHE_DEBUG, "%s: negative dentry.\n",
		    __func__);
		if (!err || err != -ENOENT) {
			if (new_op->downcall.status != 0)
				gossip_debug(GOSSIP_DCACHE_DEBUG,
				    "%s:%s:%d lookup failure.\n",
				    __FILE__, __func__, __LINE__);
			goto out_drop;
		}
	}

	orangefs_set_timeout(dentry);
	ret = 1;
out_release_op:
	op_release(new_op);
out_put_parent:
	dput(parent_dentry);
	return ret;
out_drop:
	gossip_debug(GOSSIP_DCACHE_DEBUG, "%s:%s:%d revalidate failed\n",
	    __FILE__, __func__, __LINE__);
	goto out_release_op;
}

/*
 * Verify that dentry is valid.
 *
 * Should return 1 if dentry can still be trusted, else 0.
 */
static int orangefs_d_revalidate(struct dentry *dentry, unsigned int flags)
{
	int ret;
	unsigned long time = (unsigned long) dentry->d_fsdata;

	if (time_before(jiffies, time))
		return 1;

	if (flags & LOOKUP_RCU)
		return -ECHILD;

	gossip_debug(GOSSIP_DCACHE_DEBUG, "%s: called on dentry %p.\n",
		     __func__, dentry);

	/* skip root handle lookups. */
	if (dentry->d_inode && is_root_handle(dentry->d_inode))
		return 1;

	/*
	 * If this passes, the positive dentry still exists or the negative
	 * dentry still does not exist.
	 */
	if (!orangefs_revalidate_lookup(dentry))
		return 0;

	/* We do not need to continue with negative dentries. */
	if (!dentry->d_inode)
		goto out;

	/* Now we must perform a getattr to validate the inode contents. */

	ret = orangefs_inode_check_changed(dentry->d_inode);
	if (ret < 0) {
		gossip_debug(GOSSIP_DCACHE_DEBUG, "%s:%s:%d getattr failure.\n",
		    __FILE__, __func__, __LINE__);
		return 0;
	}
	if (ret == 0)
		return 0;

out:
	gossip_debug(GOSSIP_DCACHE_DEBUG,
	    "%s: negative dentry or positive dentry and inode valid.\n",
	    __func__);
	return 1;
}

const struct dentry_operations orangefs_dentry_operations = {
	.d_revalidate = orangefs_d_revalidate,
};
/diff/net/ceph/auth_none.h?h=nds-private-remove&amp;id=0d2164af2696821b27b04bebd8420b0e881bf44d&amp;id2=f181d6a3bcc35633facf5f3925699021c13492c5'>auth_none.h</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='0d2164af2696821b27b04bebd8420b0e881bf44d'/><input type='hidden' name='id2' value='f181d6a3bcc35633facf5f3925699021c13492c5'/><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><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=0d2164af2696821b27b04bebd8420b0e881bf44d&amp;id2=f181d6a3bcc35633facf5f3925699021c13492c5'>Diffstat</a> (limited to 'net/ceph/auth_none.h')</div><table summary='diffstat' class='diffstat'>tree/?h=nds-private-remove&amp;id=dfef358bd1beb4e7b5c94eca944be9cd23dfc752'>b9a2afb38a4c2ac8ad31f49ec0d71fe9e5b1994c</a> /<a href='/cgit.cgi/linux/net-next.git/tree/net/hsr/hsr_netlink.c?h=nds-private-remove&amp;id=dfef358bd1beb4e7b5c94eca944be9cd23dfc752'>net/hsr/hsr_netlink.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/hsr/hsr_netlink.c?h=nds-private-remove&amp;id=030305d69fc6963c16003f50d7e8d74b02d0a143'>030305d69fc6963c16003f50d7e8d74b02d0a143</a> (<a href='/cgit.cgi/linux/net-next.git/diff/net/hsr/hsr_netlink.c?h=nds-private-remove&amp;id=dfef358bd1beb4e7b5c94eca944be9cd23dfc752&amp;id2=030305d69fc6963c16003f50d7e8d74b02d0a143'>diff</a>)</td></tr></table>
<div class='commit-subject'>PCI/MSI: Don't apply affinity if there aren't enough vectors left</div><div class='commit-msg'>Bart reported a problem wіth an out of bounds access in the low-level IRQ
affinity code, which we root caused to the qla2xxx driver assigning all its
MSI-X vectors to the pre and post vectors, and not having any left for the
actually spread IRQs.

Fix this issue by not asking for affinity assignment when there are no
vectors to assign left.

Fixes: 402723ad5c62 ("PCI/MSI: Provide pci_alloc_irq_vectors_affinity()")
Link: https://lkml.kernel.org/r/1485359225.3093.3.camel@sandisk.com
Reported-by: Bart Van Assche &lt;bart.vanassche@sandisk.com&gt;
Tested-by: Bart Van Assche &lt;bart.vanassche@sandisk.com&gt;
Signed-off-by: Christoph Hellwig &lt;hch@lst.de&gt;
Signed-off-by: Bjorn Helgaas &lt;bhelgaas@google.com&gt;</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=dfef358bd1beb4e7b5c94eca944be9cd23dfc752'>Diffstat</a> (limited to 'net/hsr/hsr_netlink.c')</div><table summary='diffstat' class='diffstat'>