#include <linux/module.h>

#include "notifier-error-inject.h"

static int debugfs_errno_set(void *data, u64 val)
{
	*(int *)data = clamp_t(int, val, -MAX_ERRNO, 0);
	return 0;
}

static int debugfs_errno_get(void *data, u64 *val)
{
	*val = *(int *)data;
	return 0;
}

DEFINE_SIMPLE_ATTRIBUTE(fops_errno, debugfs_errno_get, debugfs_errno_set,
			"%lld\n");

static struct dentry *debugfs_create_errno(const char *name, umode_t mode,
				struct dentry *parent, int *value)
{
	return debugfs_create_file(name, mode, parent, value, &fops_errno);
}

static int notifier_err_inject_callback(struct notifier_block *nb,
				unsigned long val, void *p)
{
	int err = 0;
	struct notifier_err_inject *err_inject =
		container_of(nb, struct notifier_err_inject, nb);
	struct notifier_err_inject_action *action;

	for (action = err_inject->actions; action->name; action++) {
		if (action->val == val) {
			err = action->error;
			break;
		}
	}
	if (err)
		pr_info("Injecting error (%d) to %s\n", err, action->name);

	return notifier_from_errno(err);
}

struct dentry *notifier_err_inject_dir;
EXPORT_SYMBOL_GPL(notifier_err_inject_dir);

struct dentry *notifier_err_inject_init(const char *name, struct dentry *parent,
			struct notifier_err_inject *err_inject, int priority)
{
	struct notifier_err_inject_action *action;
	umode_t mode = S_IFREG | S_IRUSR | S_IWUSR;
	struct dentry *dir;
	struct dentry *actions_dir;

	err_inject->nb.notifier_call = notifier_err_inject_callback;
	err_inject->nb.priority = priority;

	dir = debugfs_create_dir(name, parent);
	if (!dir)
		return ERR_PTR(-ENOMEM);

	actions_dir = debugfs_create_dir("actions", dir);
	if (!actions_dir)
		goto fail;

	for (action = err_inject->actions; action->name; action++) {
		struct dentry *action_dir;

		action_dir = debugfs_create_dir(action->name, actions_dir);
		if (!action_dir)
			goto fail;

		/*
		 * Create debugfs r/w file containing action->error. If
		 * notifier call chain is called with action->val, it will
		 * fail with the error code
		 */
		if (!debugfs_create_errno("error", mode, action_dir,
					&action->error))
			goto fail;
	}
	return dir;
fail:
	debugfs_remove_recursive(dir);
	return ERR_PTR(-ENOMEM);
}
EXPORT_SYMBOL_GPL(notifier_err_inject_init);

static int __init err_inject_init(void)
{
	notifier_err_inject_dir =
		debugfs_create_dir("notifier-error-inject", NULL);

	if (!notifier_err_inject_dir)
		return -ENOMEM;

	return 0;
}

static void __exit err_inject_exit(void)
{
	debugfs_remove_recursive(notifier_err_inject_dir);
}

module_init(err_inject_init);
module_exit(err_inject_exit);

MODULE_DESCRIPTION("Notifier error injection module");
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Akinobu Mita <akinobu.mita@gmail.com>");
='/cgit.cgi/linux/net-next.git/diff/net?id=1a0bee6c1e788218fd1d141db320db970aace7f0'>net</a>/<a href='/cgit.cgi/linux/net-next.git/diff/net/batman-adv?id=1a0bee6c1e788218fd1d141db320db970aace7f0'>batman-adv</a>/<a href='/cgit.cgi/linux/net-next.git/diff/net/batman-adv/Kconfig?id=1a0bee6c1e788218fd1d141db320db970aace7f0'>Kconfig</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='1a0bee6c1e788218fd1d141db320db970aace7f0'/><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/?id=1a0bee6c1e788218fd1d141db320db970aace7f0'>Diffstat</a> (limited to 'net/batman-adv/Kconfig')</div><table summary='diffstat' class='diffstat'>e_node_acl-&gt;acl_kref reaches zero.

(Drop unnecessary list_del_init usage - HCH)

Reported-by: Rob Millner &lt;rlm@daterainc.com&gt;
Tested-by: Rob Millner &lt;rlm@daterainc.com&gt;
Cc: Rob Millner &lt;rlm@daterainc.com&gt;
Cc: stable@vger.kernel.org # 4.1+
Signed-off-by: Nicholas Bellinger &lt;nab@linux-iscsi.org&gt;


</td></tr>
<tr class='logheader'><td><span title='2017-02-08 07:47:19 -0800'>2017-02-08</span></td><td class='logsubject'><a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=c54eeffbe9338fa982dc853d816fda9202a13b5a'>target: Fix early transport_generic_handle_tmr abort scenario</a></td><td>Nicholas Bellinger</td><td>1</td><td><span class='deletions'>-2</span>/<span class='insertions'>+15</span></td></tr>
<tr class='nohover-highlight'><td/><td colspan='5' class='logmsg'>
This patch fixes a bug where incoming task management requests
can be explicitly aborted during an active LUN_RESET, but who's
struct work_struct are canceled in-flight before execution.

This occurs when core_tmr_drain_tmr_list() invokes cancel_work_sync()
for the incoming se_tmr_req-&gt;task_cmd-&gt;work, resulting in cmd-&gt;work
for target_tmr_work() never getting invoked and the aborted TMR
waiting indefinately within transport_wait_for_tasks().

To address this case, perform a CMD_T_ABORTED check early in
transport_generic_handle_tmr(), and invoke the normal path via
transport_cmd_check_stop_to_fabric() to complete any TMR kthreads
blocked waiting for CMD_T_STOP in transport_wait_for_tasks().

Also, move the TRANSPORT_ISTATE_PROCESSING assignment earlier
into transport_generic_handle_tmr() so the existing check in
core_tmr_drain_tmr_list() avoids attempting abort the incoming
se_tmr_req-&gt;task_cmd-&gt;work if it has already been queued into
se_device-&gt;tmr_wq.

Reported-by: Rob Millner &lt;rlm@daterainc.com&gt;
Tested-by: Rob Millner &lt;rlm@daterainc.com&gt;
Cc: Rob Millner &lt;rlm@daterainc.com&gt;
Reviewed-by: Christoph Hellwig &lt;hch@lst.de&gt;
Cc: stable@vger.kernel.org # 3.14+
Signed-off-by: Nicholas Bellinger &lt;nab@linux-iscsi.org&gt;


</td></tr>
<tr class='logheader'><td><span title='2017-02-08 07:46:54 -0800'>2017-02-08</span></td><td class='logsubject'><a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=0583c261e6325f392c1f7a1b9112e31298e1a4bd'>target: Use correct SCSI status during EXTENDED_COPY exception</a></td><td>Nicholas Bellinger</td><td>1</td><td><span class='deletions'>-1</span>/<span class='insertions'>+1</span></td></tr>
<tr class='nohover-highlight'><td/><td colspan='5' class='logmsg'>
This patch adds the missing target_complete_cmd() SCSI status
parameter change in target_xcopy_do_work(), that was originally
missing in commit 926317de33.

It correctly propigates up the correct SCSI status during
EXTENDED_COPY exception cases, instead of always using the
hardcoded SAM_STAT_CHECK_CONDITION from original code.

This is required for ESX host environments that expect to
hit SAM_STAT_RESERVATION_CONFLICT for certain scenarios,
and SAM_STAT_CHECK_CONDITION results in non-retriable
status for these cases.

Reported-by: Nixon Vincent &lt;nixon.vincent@calsoftinc.com&gt;
Tested-by: Nixon Vincent &lt;nixon.vincent@calsoftinc.com&gt;
Cc: Nixon Vincent &lt;nixon.vincent@calsoftinc.com&gt;
Reviewed-by: Christoph Hellwig &lt;hch@lst.de&gt;
Cc: stable@vger.kernel.org # 3.14+
Signed-off-by: Nicholas Bellinger &lt;nab@linux-iscsi.org&gt;


</td></tr>
<tr class='logheader'><td><span title='2017-02-08 07:46:31 -0800'>2017-02-08</span></td><td class='logsubject'><a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=391e2a6de9781e4906dd7e0b1cc097050bf43e11'>target: Don't BUG_ON during NodeACL dynamic -&gt; explicit conversion</a></td><td>Nicholas Bellinger</td><td>1</td><td><span class='deletions'>-1</span>/<span class='insertions'>+9</span></td></tr>
<tr class='nohover-highlight'><td/><td colspan='5' class='logmsg'>
After the v4.2+ RCU conversion to se_node_acl-&gt;lun_entry_hlist,
a BUG_ON() was added in core_enable_device_list_for_node() to
detect when the located orig-&gt;se_lun_acl contains an existing
se_lun_acl pointer reference.

However, this scenario can happen when a dynamically generated
NodeACL is being converted to an explicit NodeACL, when the
explicit NodeACL contains a different LUN mapping than the
default provided by the WWN endpoint.

So instead of triggering BUG_ON(), go ahead and fail instead
following the original pre RCU conversion logic.

Reported-by: Benjamin ESTRABAUD &lt;ben.estrabaud@mpstor.com&gt;
Cc: Benjamin ESTRABAUD &lt;ben.estrabaud@mpstor.com&gt;
Reviewed-by: Christoph Hellwig &lt;hch@lst.de&gt;
Cc: stable@vger.kernel.org # 4.2+
Signed-off-by: Nicholas Bellinger &lt;nab@linux-iscsi.org&gt;


</td></tr>
<tr class='logheader'><td><span title='2017-02-05 15:10:58 -0800'>2017-02-05</span></td><td class='logsubject'><a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=d5adbfcd5f7bcc6fa58a41c5c5ada0e5c826ce2c'>Linux 4.10-rc7</a></td><td>Linus Torvalds