#include <linux/fault-inject.h>
#include <linux/slab.h>
#include <linux/mm.h>
#include "slab.h"

static struct {
	struct fault_attr attr;
	bool ignore_gfp_reclaim;
	bool cache_filter;
} failslab = {
	.attr = FAULT_ATTR_INITIALIZER,
	.ignore_gfp_reclaim = true,
	.cache_filter = false,
};

bool should_failslab(struct kmem_cache *s, gfp_t gfpflags)
{
	/* No fault-injection for bootstrap cache */
	if (unlikely(s == kmem_cache))
		return false;

	if (gfpflags & __GFP_NOFAIL)
		return false;

	if (failslab.ignore_gfp_reclaim && (gfpflags & __GFP_RECLAIM))
		return false;

	if (failslab.cache_filter && !(s->flags & SLAB_FAILSLAB))
		return false;

	return should_fail(&failslab.attr, s->object_size);
}

static int __init setup_failslab(char *str)
{
	return setup_fault_attr(&failslab.attr, str);
}
__setup("failslab=", setup_failslab);

#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
static int __init failslab_debugfs_init(void)
{
	struct dentry *dir;
	umode_t mode = S_IFREG | S_IRUSR | S_IWUSR;

	dir = fault_create_debugfs_attr("failslab", NULL, &failslab.attr);
	if (IS_ERR(dir))
		return PTR_ERR(dir);

	if (!debugfs_create_bool("ignore-gfp-wait", mode, dir,
				&failslab.ignore_gfp_reclaim))
		goto fail;
	if (!debugfs_create_bool("cache-filter", mode, dir,
				&failslab.cache_filter))
		goto fail;

	return 0;
fail:
	debugfs_remove_recursive(dir);

	return -ENOMEM;
}

late_initcall(failslab_debugfs_init);

#endif /* CONFIG_FAULT_INJECTION_DEBUG_FS */
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/log/?id=e2e004acc7cbe3c531e752a270a74e95cde3ea48'>root</a>/<a href='/cgit.cgi/linux/net-next.git/log/net?id=e2e004acc7cbe3c531e752a270a74e95cde3ea48'>net</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/cgit.cgi/linux/net-next.git/log/net?id=e2e004acc7cbe3c531e752a270a74e95cde3ea48&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>
<tr><td><span title='2017-02-09 16:38:48 -0500'>2017-02-09</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net?id=98e3862ca2b1ae595a13805dcab4c3a6d7718f4d'>kcm: fix 0-length case for kcm_sendmsg()</a></td><td>WANG Cong</td><td>1</td><td><span class='deletions'>-18</span>/<span class='insertions'>+22</span></td></tr>
<tr><td><span title='2017-02-08 14:50:51 -0500'>2017-02-08</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net?id=382e1eea2d983cd2343482c6a638f497bb44a636'>net: dsa: Do not destroy invalid network devices</a></td><td>Florian Fainelli</td><td>1</td><td><span class='deletions'>-0</span>/<span class='insertions'>+1</span></td></tr>
<tr><td><span title='2017-02-08 13:58:21 -0500'>2017-02-08</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net?id=73d2c6678e6c3af7e7a42b1e78cd0211782ade32'>ping: fix a null pointer dereference</a></td><td>WANG Cong</td><td>1</td><td><span class='deletions'>-0</span>/<span class='insertions'>+2</span></td></tr>
<tr><td><span title='2017-02-08 13:56:37 -0500'>2017-02-08</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net?id=57031eb794906eea4e1c7b31dc1e2429c0af0c66'>packet: round up linear to header len</a></td><td>Willem de Bruijn</td><td>1</td><td><span class='deletions'>-3</span>/<span class='insertions'>+4</span></td></tr>
<tr><td><span title='2017-02-08 13:56:37 -0500'>2017-02-08</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net?id=217e6fa24ce28ec87fca8da93c9016cb78028612'>net: introduce device min_header_len</a></td><td>Willem de Bruijn</td><td>1</td><td><span class='deletions'>-0</span>/<span class='insertions'>+1</span></td></tr>
<tr><td><span title='2017-02-08 13:12:22 -0500'>2017-02-08</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net?id=d7426c69a1942b2b9b709bf66b944ff09f561484'>sit: fix a double free on error path</a></td><td>WANG Cong</td><td>1</td><td><span class='deletions'>-0</span>/<span class='insertions'>+1</span></td></tr>
<tr><td><span title='2017-02-08 11:54:40 -0500'>2017-02-08</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net?id=a11a7f71cac209c7c9cca66eb506e1ebb033a3b3'>ipv6: addrconf: fix generation of new temporary addresses</a></td><td>Marcus Huewe</td><td>1</td><td><span class='deletions'>-0</span>/<span class='insertions'>+6</span></td></tr>
<tr><td><span title='2017-02-07 12:10:57 -0800'>2017-02-07</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net?id=926af6273fc683cd98cd0ce7bf0d04a02eed6742'>Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net</a></td><td>Linus Torvalds