[glibc.git] / nscd / nscd_getserv_r.c

/* Copyright (C) 2007, 2009 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Ulrich Drepper <drepper@redhat.com>, 2007.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library 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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#include <errno.h>
#include <string.h>
#include <not-cancel.h>
#include <stdio-common/_itoa.h>

#include "nscd-client.h"
#include "nscd_proto.h"


int __nss_not_use_nscd_services;


static int nscd_getserv_r (const char *crit, size_t critlen, const char *proto,
			   request_type type, struct servent *resultbuf,
			   char *buf, size_t buflen, struct servent **result);


int
__nscd_getservbyname_r (const char *name, const char *proto,
			struct servent *result_buf, char *buf, size_t buflen,
			struct servent **result)
{
  return nscd_getserv_r (name, strlen (name), proto, GETSERVBYNAME, result_buf,
			 buf, buflen, result);
}


int
__nscd_getservbyport_r (int port, const char *proto,
			struct servent *result_buf, char *buf, size_t buflen,
			struct servent **result)
{
  char portstr[3 * sizeof (int) + 2];
  portstr[sizeof (portstr) - 1] = '\0';
  char *cp = _itoa_word (port, portstr + sizeof (portstr) - 1, 10, 0);

  return nscd_getserv_r (cp, portstr + sizeof (portstr) - cp, proto,
			 GETSERVBYPORT, result_buf, buf, buflen, result);
}


libc_locked_map_ptr (, __serv_map_handle) attribute_hidden;
/* Note that we only free the structure if necessary.  The memory
   mapping is not removed since it is not visible to the malloc
   handling.  */
libc_freeres_fn (serv_map_free)
{
  if (__serv_map_handle.mapped != NO_MAPPING)
    {
      void *p = __serv_map_handle.mapped;
      __serv_map_handle.mapped = NO_MAPPING;
      free (p);
    }
}


static int
nscd_getserv_r (const char *crit, size_t critlen, const char *proto,
		request_type type, struct servent *resultbuf,
		char *buf, size_t buflen, struct servent **result)
{
  int gc_cycle;
  int nretries = 0;

  /* If the mapping is available, try to search there instead of
     communicating with the nscd.  */
  struct mapped_database *mapped;
  mapped = __nscd_get_map_ref (GETFDSERV, "services", &__serv_map_handle,
			       &gc_cycle);
  size_t protolen = proto == NULL ? 0 : strlen (proto);
  size_t keylen = critlen + 1 + protolen + 1;
  char *key = alloca (keylen);
  memcpy (__mempcpy (__mempcpy (key, crit, critlen),
		     "/", 1), proto ?: "", protolen + 1);

 retry:;
  const char *s_name = NULL;
  const char *s_proto = NULL;
  const uint32_t *aliases_len = NULL;
  const char *aliases_list = NULL;
  int retval = -1;
  const char *recend = (const char *) ~UINTMAX_C (0);
  int sock = -1;
  serv_response_header serv_resp;

  if (mapped != NO_MAPPING)
    {
      struct datahead *found = __nscd_cache_search (type, key, keylen, mapped,
						    sizeof serv_resp);

      if (found != NULL)
	{
	  s_name = (char *) (&found->data[0].servdata + 1);
	  serv_resp = found->data[0].servdata;
	  s_proto = s_name + serv_resp.s_name_len;
	  aliases_len = (uint32_t *) (s_proto + serv_resp.s_proto_len);
	  aliases_list = ((char *) aliases_len
			  + serv_resp.s_aliases_cnt * sizeof (uint32_t));
	  recend = (const char *) found->data + found->recsize;
	  /* Now check if we can trust serv_resp fields.  If GC is
	     in progress, it can contain anything.  */
	  if (mapped->head->gc_cycle != gc_cycle)
	    {
	      retval = -2;
	      goto out;
	    }
	  if (__builtin_expect ((const char *) aliases_len
				+ serv_resp.s_aliases_cnt * sizeof (uint32_t)
				> recend, 0))
	    goto out;

#ifndef _STRING_ARCH_unaligned
	  /* The aliases_len array in the mapped database might very
	     well be unaligned.  We will access it word-wise so on
	     platforms which do not tolerate unaligned accesses we
	     need to make an aligned copy.  */
	  if (((uintptr_t) aliases_len & (__alignof__ (*aliases_len) - 1))
	      != 0)
	    {
	      uint32_t *tmp = alloca (serv_resp.s_aliases_cnt
				      * sizeof (uint32_t));
	      aliases_len = memcpy (tmp, aliases_len,
				    serv_resp.s_aliases_cnt
				    * sizeof (uint32_t));
	    }
#endif
	}
    }

  if (s_name == NULL)
    {
      sock = __nscd_open_socket (key, keylen, type, &serv_resp,
				 sizeof (serv_resp));
      if (sock == -1)
	{
	  __nss_not_use_nscd_services = 1;
	  goto out;
	}
    }

  /* No value found so far.  */
  *result = NULL;

  if (__builtin_expect (serv_resp.found == -1, 0))
    {
      /* The daemon does not cache this database.  */
      __nss_not_use_nscd_services = 1;
      goto out_close;
    }

  if (serv_resp.found == 1)
    {
      char *cp = buf;
      uintptr_t align1;
      uintptr_t align2;
      size_t total_len;
      ssize_t cnt;
      int n;

      /* A first check whether the buffer is sufficiently large is possible.  */
      /* Now allocate the buffer the array for the group members.  We must
	 align the pointer and the base of the h_addr_list pointers.  */
      align1 = ((__alignof__ (char *) - (cp - ((char *) 0)))
		& (__alignof__ (char *) - 1));
      align2 = ((__alignof__ (char *) - ((cp + align1 + serv_resp.s_name_len
					  + serv_resp.s_proto_len)
					 - ((char *) 0)))
		& (__alignof__ (char *) - 1));
      if (buflen < (align1 + serv_resp.s_name_len + serv_resp.s_proto_len
		    + align2
		    + (serv_resp.s_aliases_cnt + 1) * sizeof (char *)))
	{
	no_room:
	  __set_errno (ERANGE);
	  retval = ERANGE;
	  goto out_close;
	}
      cp += align1;

      /* Prepare the result as far as we can.  */
      resultbuf->s_aliases = (char **) cp;
      cp += (serv_resp.s_aliases_cnt + 1) * sizeof (char *);

      resultbuf->s_name = cp;
      cp += serv_resp.s_name_len;
      resultbuf->s_proto = cp;
      cp += serv_resp.s_proto_len + align2;
      resultbuf->s_port = serv_resp.s_port;

      if (s_name == NULL)
	{
	  struct iovec vec[2];

	  vec[0].iov_base = resultbuf->s_name;
	  vec[0].iov_len = serv_resp.s_name_len + serv_resp.s_proto_len;
	  total_len = vec[0].iov_len;
	  n = 1;

	  if (serv_resp.s_aliases_cnt > 0)
	    {
	      aliases_len = alloca (serv_resp.s_aliases_cnt
				    * sizeof (uint32_t));
	      vec[n].iov_base = (void *) aliases_len;
	      vec[n].iov_len = serv_resp.s_aliases_cnt * sizeof (uint32_t);

	      total_len += serv_resp.s_aliases_cnt * sizeof (uint32_t);
	      ++n;
	    }

	  if ((size_t) __readvall (sock, vec, n) != total_len)
	    goto out_close;
	}
      else
	memcpy (resultbuf->s_name, s_name,
		serv_resp.s_name_len + serv_resp.s_proto_len);

      /*  Now we also can read the aliases.  */
      total_len = 0;
      for (cnt = 0; cnt < serv_resp.s_aliases_cnt; ++cnt)
	{
	  resultbuf->s_aliases[cnt] = cp;
	  cp += aliases_len[cnt];
	  total_len += aliases_len[cnt];
	}
      resultbuf->s_aliases[cnt] = NULL;

      if (__builtin_expect ((const char *) aliases_list + total_len > recend,
			    0))
	{
	  /* aliases_len array might contain garbage during nscd GC cycle,
	     retry rather than fail in that case.  */
	  if (aliases_list != NULL && mapped->head->gc_cycle != gc_cycle)
	    retval = -2;
	  goto out_close;
	}

      /* See whether this would exceed the buffer capacity.  */
      if (__builtin_expect (cp > buf + buflen, 0))
	{
	  /* aliases_len array might contain garbage during nscd GC cycle,
	     retry rather than fail in that case.  */
	  if (aliases_list != NULL && mapped->head->gc_cycle != gc_cycle)
	    {
	      retval = -2;
	      goto out_close;
	    }
	  goto no_room;
	}

      /* And finally read the aliases.  */
      if (aliases_list == NULL)
	{
	  if (total_len == 0
	      || ((size_t) __readall (sock, resultbuf->s_aliases[0], total_len)
		  == total_len))
	    {
	      retval = 0;
	      *result = resultbuf;
	    }
	}
      else
	{
	  memcpy (resultbuf->s_aliases[0], aliases_list, total_len);

	  /* Try to detect corrupt databases.  */
	  if (resultbuf->s_name[serv_resp.s_name_len - 1] != '\0'
	      || resultbuf->s_proto[serv_resp.s_proto_len - 1] != '\0'
	      || ({for (cnt = 0; cnt < serv_resp.s_aliases_cnt; ++cnt)
		     if (resultbuf->s_aliases[cnt][aliases_len[cnt] - 1]
			 != '\0')
		       break;
		   cnt < serv_resp.s_aliases_cnt; }))
	    {
	      /* We cannot use the database.  */
	      if (mapped->head->gc_cycle != gc_cycle)
		retval = -2;
	      goto out_close;
	    }

	  retval = 0;
	  *result = resultbuf;
	}
    }
  else
    {
      /* Set errno to 0 to indicate no error, just no found record.  */
      __set_errno (0);
      /* Even though we have not found anything, the result is zero.  */
      retval = 0;
    }

 out_close:
  if (sock != -1)
    close_not_cancel_no_status (sock);
 out:
  if (__nscd_drop_map_ref (mapped, &gc_cycle) != 0)
    {
      /* When we come here this means there has been a GC cycle while we
	 were looking for the data.  This means the data might have been
	 inconsistent.  Retry if possible.  */
      if ((gc_cycle & 1) != 0 || ++nretries == 5 || retval == -1)
	{
	  /* nscd is just running gc now.  Disable using the mapping.  */
	  if (atomic_decrement_val (&mapped->counter) == 0)
	    __nscd_unmap (mapped);
	  mapped = NO_MAPPING;
	}

      if (retval != -1)
	goto retry;
    }

  return retval;
}
Commit	Line	Data
cfe1fc10	1	/* Copyright (C) 2007, 2009 Free Software Foundation, Inc.
b21fa963 UD	2	This file is part of the GNU C Library.
	3	Contributed by Ulrich Drepper <drepper@redhat.com>, 2007.
	4
	5	The GNU C Library is free software; you can redistribute it and/or
	6	modify it under the terms of the GNU Lesser General Public
	7	License as published by the Free Software Foundation; either
	8	version 2.1 of the License, or (at your option) any later version.
	9
	10	The GNU C Library is distributed in the hope that it will be useful,
	11	but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	13	Lesser General Public License for more details.
	14
	15	You should have received a copy of the GNU Lesser General Public
	16	License along with the GNU C Library; if not, write to the Free
	17	Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
	18	02111-1307 USA. */
	19
	20	#include <errno.h>
	21	#include <string.h>
	22	#include <not-cancel.h>
	23	#include <stdio-common/_itoa.h>
	24
	25	#include "nscd-client.h"
	26	#include "nscd_proto.h"
	27
	28
	29	int __nss_not_use_nscd_services;
	30
	31
	32	static int nscd_getserv_r (const char crit, size_t critlen, const char proto,
	33	request_type type, struct servent *resultbuf,
	34	char buf, size_t buflen, struct servent *result);
	35
	36
	37	int
	38	__nscd_getservbyname_r (const char name, const char proto,
	39	struct servent result_buf, char buf, size_t buflen,
	40	struct servent **result)
	41	{
	42	return nscd_getserv_r (name, strlen (name), proto, GETSERVBYNAME, result_buf,
	43	buf, buflen, result);
	44	}
	45
	46
	47	int
	48	__nscd_getservbyport_r (int port, const char *proto,
	49	struct servent result_buf, char buf, size_t buflen,
	50	struct servent **result)
	51	{
	52	char portstr[3 * sizeof (int) + 2];
	53	portstr[sizeof (portstr) - 1] = '\0';
	54	char *cp = _itoa_word (port, portstr + sizeof (portstr) - 1, 10, 0);
	55
ee78670e	56	return nscd_getserv_r (cp, portstr + sizeof (portstr) - cp, proto,
b21fa963 UD	57	GETSERVBYPORT, result_buf, buf, buflen, result);
	58	}
	59
	60
	61	libc_locked_map_ptr (, __serv_map_handle) attribute_hidden;
	62	/* Note that we only free the structure if necessary. The memory
	63	mapping is not removed since it is not visible to the malloc
	64	handling. */
	65	libc_freeres_fn (serv_map_free)
	66	{
	67	if (__serv_map_handle.mapped != NO_MAPPING)
	68	{
	69	void *p = __serv_map_handle.mapped;
	70	__serv_map_handle.mapped = NO_MAPPING;
	71	free (p);
	72	}
	73	}
	74
	75
	76	static int
	77	nscd_getserv_r (const char crit, size_t critlen, const char proto,
	78	request_type type, struct servent *resultbuf,
	79	char buf, size_t buflen, struct servent *result)
	80	{
	81	int gc_cycle;
	82	int nretries = 0;
	83
	84	/* If the mapping is available, try to search there instead of
	85	communicating with the nscd. */
	86	struct mapped_database *mapped;
	87	mapped = __nscd_get_map_ref (GETFDSERV, "services", &__serv_map_handle,
	88	&gc_cycle);
	89	size_t protolen = proto == NULL ? 0 : strlen (proto);
	90	size_t keylen = critlen + 1 + protolen + 1;
	91	char *key = alloca (keylen);
	92	memcpy (__mempcpy (__mempcpy (key, crit, critlen),
	93	"/", 1), proto ?: "", protolen + 1);
	94
	95	retry:;
b21fa963 UD	96	const char *s_name = NULL;
	97	const char *s_proto = NULL;
	98	const uint32_t *aliases_len = NULL;
	99	const char *aliases_list = NULL;
	100	int retval = -1;
	101	const char recend = (const char ) ~UINTMAX_C (0);
	102	int sock = -1;
1a77d37f JJ	103	serv_response_header serv_resp;
1a77d37f JJ	104
b21fa963 UD	105	if (mapped != NO_MAPPING)
b21fa963 UD	106	{
cfe1fc10 JJ	107	struct datahead *found = __nscd_cache_search (type, key, keylen, mapped,
cfe1fc10 JJ	108	sizeof serv_resp);
b21fa963 UD	109
	110	if (found != NULL)
	111	{
1a77d37f JJ	112	s_name = (char *) (&found->data[0].servdata + 1);
	113	serv_resp = found->data[0].servdata;
	114	s_proto = s_name + serv_resp.s_name_len;
	115	aliases_len = (uint32_t *) (s_proto + serv_resp.s_proto_len);
b21fa963	116	aliases_list = ((char *) aliases_len
1a77d37f JJ	117	+ serv_resp.s_aliases_cnt * sizeof (uint32_t));
	118	recend = (const char *) found->data + found->recsize;
	119	/* Now check if we can trust serv_resp fields. If GC is
	120	in progress, it can contain anything. */
	121	if (mapped->head->gc_cycle != gc_cycle)
	122	{
	123	retval = -2;
	124	goto out;
	125	}
3687a5a7 JJ	126	if (__builtin_expect ((const char *) aliases_len
	127	+ serv_resp.s_aliases_cnt * sizeof (uint32_t)
	128	> recend, 0))
	129	goto out;
b21fa963 UD	130
	131	#ifndef _STRING_ARCH_unaligned
	132	/* The aliases_len array in the mapped database might very
	133	well be unaligned. We will access it word-wise so on
	134	platforms which do not tolerate unaligned accesses we
	135	need to make an aligned copy. */
	136	if (((uintptr_t) aliases_len & (__alignof__ (*aliases_len) - 1))
	137	!= 0)
	138	{
1a77d37f	139	uint32_t *tmp = alloca (serv_resp.s_aliases_cnt
b21fa963 UD	140	* sizeof (uint32_t));
b21fa963 UD	141	aliases_len = memcpy (tmp, aliases_len,
1a77d37f	142	serv_resp.s_aliases_cnt
b21fa963 UD	143	* sizeof (uint32_t));
	144	}
	145	#endif
b21fa963 UD	146	}
	147	}
	148
1a77d37f	149	if (s_name == NULL)
b21fa963	150	{
1a77d37f JJ	151	sock = __nscd_open_socket (key, keylen, type, &serv_resp,
1a77d37f JJ	152	sizeof (serv_resp));
b21fa963 UD	153	if (sock == -1)
	154	{
	155	__nss_not_use_nscd_services = 1;
	156	goto out;
	157	}
b21fa963 UD	158	}
	159
	160	/* No value found so far. */
	161	*result = NULL;
	162
1a77d37f	163	if (__builtin_expect (serv_resp.found == -1, 0))
b21fa963 UD	164	{
	165	/* The daemon does not cache this database. */
	166	__nss_not_use_nscd_services = 1;
	167	goto out_close;
	168	}
	169
1a77d37f	170	if (serv_resp.found == 1)
b21fa963 UD	171	{
	172	char *cp = buf;
	173	uintptr_t align1;
	174	uintptr_t align2;
	175	size_t total_len;
	176	ssize_t cnt;
	177	int n;
	178
	179	/* A first check whether the buffer is sufficiently large is possible. */
	180	/* Now allocate the buffer the array for the group members. We must
	181	align the pointer and the base of the h_addr_list pointers. */
	182	align1 = ((__alignof__ (char ) - (cp - ((char ) 0)))
	183	& (__alignof__ (char *) - 1));
1a77d37f JJ	184	align2 = ((__alignof__ (char *) - ((cp + align1 + serv_resp.s_name_len
1a77d37f JJ	185	+ serv_resp.s_proto_len)
b21fa963 UD	186	- ((char *) 0)))
b21fa963 UD	187	& (__alignof__ (char *) - 1));
1a77d37f	188	if (buflen < (align1 + serv_resp.s_name_len + serv_resp.s_proto_len
b21fa963	189	+ align2
1a77d37f	190	+ (serv_resp.s_aliases_cnt + 1) * sizeof (char *)))
b21fa963 UD	191	{
	192	no_room:
	193	__set_errno (ERANGE);
	194	retval = ERANGE;
	195	goto out_close;
	196	}
	197	cp += align1;
	198
	199	/* Prepare the result as far as we can. */
	200	resultbuf->s_aliases = (char **) cp;
1a77d37f	201	cp += (serv_resp.s_aliases_cnt + 1) * sizeof (char *);
b21fa963 UD	202
b21fa963 UD	203	resultbuf->s_name = cp;
1a77d37f	204	cp += serv_resp.s_name_len;
b21fa963	205	resultbuf->s_proto = cp;
1a77d37f JJ	206	cp += serv_resp.s_proto_len + align2;
1a77d37f JJ	207	resultbuf->s_port = serv_resp.s_port;
b21fa963 UD	208
	209	if (s_name == NULL)
	210	{
	211	struct iovec vec[2];
	212
	213	vec[0].iov_base = resultbuf->s_name;
1a77d37f	214	vec[0].iov_len = serv_resp.s_name_len + serv_resp.s_proto_len;
b21fa963 UD	215	total_len = vec[0].iov_len;
	216	n = 1;
	217
1a77d37f	218	if (serv_resp.s_aliases_cnt > 0)
b21fa963	219	{
1a77d37f	220	aliases_len = alloca (serv_resp.s_aliases_cnt
b21fa963 UD	221	* sizeof (uint32_t));
b21fa963 UD	222	vec[n].iov_base = (void *) aliases_len;
1a77d37f	223	vec[n].iov_len = serv_resp.s_aliases_cnt * sizeof (uint32_t);
b21fa963	224
1a77d37f	225	total_len += serv_resp.s_aliases_cnt * sizeof (uint32_t);
b21fa963 UD	226	++n;
	227	}
	228
	229	if ((size_t) __readvall (sock, vec, n) != total_len)
	230	goto out_close;
	231	}
	232	else
	233	memcpy (resultbuf->s_name, s_name,
1a77d37f	234	serv_resp.s_name_len + serv_resp.s_proto_len);
b21fa963 UD	235
	236	/* Now we also can read the aliases. */
	237	total_len = 0;
1a77d37f	238	for (cnt = 0; cnt < serv_resp.s_aliases_cnt; ++cnt)
b21fa963 UD	239	{
	240	resultbuf->s_aliases[cnt] = cp;
	241	cp += aliases_len[cnt];
	242	total_len += aliases_len[cnt];
	243	}
	244	resultbuf->s_aliases[cnt] = NULL;
	245
	246	if (__builtin_expect ((const char *) aliases_list + total_len > recend,
	247	0))
1a77d37f JJ	248	{
	249	/* aliases_len array might contain garbage during nscd GC cycle,
	250	retry rather than fail in that case. */
	251	if (aliases_list != NULL && mapped->head->gc_cycle != gc_cycle)
	252	retval = -2;
	253	goto out_close;
	254	}
	255
b21fa963 UD	256	/* See whether this would exceed the buffer capacity. */
b21fa963 UD	257	if (__builtin_expect (cp > buf + buflen, 0))
1a77d37f JJ	258	{
	259	/* aliases_len array might contain garbage during nscd GC cycle,
	260	retry rather than fail in that case. */
	261	if (aliases_list != NULL && mapped->head->gc_cycle != gc_cycle)
	262	{
	263	retval = -2;
	264	goto out_close;
	265	}
	266	goto no_room;
	267	}
b21fa963 UD	268
	269	/* And finally read the aliases. */
	270	if (aliases_list == NULL)
	271	{
	272	if (total_len == 0
	273	\|\| ((size_t) __readall (sock, resultbuf->s_aliases[0], total_len)
	274	== total_len))
	275	{
	276	retval = 0;
	277	*result = resultbuf;
	278	}
	279	}
	280	else
	281	{
	282	memcpy (resultbuf->s_aliases[0], aliases_list, total_len);
	283
	284	/* Try to detect corrupt databases. */
1a77d37f JJ	285	if (resultbuf->s_name[serv_resp.s_name_len - 1] != '\0'
	286	\|\| resultbuf->s_proto[serv_resp.s_proto_len - 1] != '\0'
	287	\|\| ({for (cnt = 0; cnt < serv_resp.s_aliases_cnt; ++cnt)
b21fa963 UD	288	if (resultbuf->s_aliases[cnt][aliases_len[cnt] - 1]
	289	!= '\0')
	290	break;
1a77d37f JJ	291	cnt < serv_resp.s_aliases_cnt; }))
	292	{
	293	/* We cannot use the database. */
	294	if (mapped->head->gc_cycle != gc_cycle)
	295	retval = -2;
	296	goto out_close;
	297	}
b21fa963 UD	298
	299	retval = 0;
	300	*result = resultbuf;
	301	}
	302	}
	303	else
	304	{
cfca0aa3 UD	305	/* Set errno to 0 to indicate no error, just no found record. */
cfca0aa3 UD	306	__set_errno (0);
b21fa963 UD	307	/* Even though we have not found anything, the result is zero. */
	308	retval = 0;
	309	}
	310
	311	out_close:
	312	if (sock != -1)
	313	close_not_cancel_no_status (sock);
	314	out:
1a77d37f	315	if (__nscd_drop_map_ref (mapped, &gc_cycle) != 0)
b21fa963 UD	316	{
	317	/* When we come here this means there has been a GC cycle while we
	318	were looking for the data. This means the data might have been
	319	inconsistent. Retry if possible. */
1a77d37f	320	if ((gc_cycle & 1) != 0 \|\| ++nretries == 5 \|\| retval == -1)
b21fa963 UD	321	{
b21fa963 UD	322	/* nscd is just running gc now. Disable using the mapping. */
1a77d37f JJ	323	if (atomic_decrement_val (&mapped->counter) == 0)
1a77d37f JJ	324	__nscd_unmap (mapped);
b21fa963 UD	325	mapped = NO_MAPPING;
	326	}
	327
1a77d37f JJ	328	if (retval != -1)
1a77d37f JJ	329	goto retry;
b21fa963 UD	330	}
	331
	332	return retval;
	333	}