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-rw-r--r--nscd/nscd_getai.c40
-rw-r--r--nscd/nscd_getgr_r.c47
-rw-r--r--nscd/nscd_gethst_r.c35
-rw-r--r--nscd/nscd_getpw_r.c34
-rw-r--r--nscd/nscd_helper.c2
-rw-r--r--nscd/nscd_initgroups.c33
6 files changed, 131 insertions, 60 deletions
diff --git a/nscd/nscd_getai.c b/nscd/nscd_getai.c
index 6a4476fa7c..e717dd85a0 100644
--- a/nscd/nscd_getai.c
+++ b/nscd/nscd_getai.c
@@ -49,19 +49,21 @@ int
__nscd_getai (const char *key, struct nscd_ai_result **result, int *h_errnop)
{
size_t keylen = strlen (key) + 1;
+ int gc_cycle;
+
+ /* If the mapping is available, try to search there instead of
+ communicating with the nscd. */
+ struct mapped_database *mapped;
+ mapped = __nscd_get_map_ref (GETFDHST, "hosts", &map_handle, &gc_cycle);
+
+ retry:;
const ai_response_header *ai_resp = NULL;
struct nscd_ai_result *resultbuf = NULL;
const char *recend = (const char *) ~UINTMAX_C (0);
char *respdata = NULL;
int retval = -1;
int sock = -1;
- int gc_cycle;
- /* If the mapping is available, try to search there instead of
- communicating with the nscd. */
- struct mapped_database *mapped = __nscd_get_map_ref (GETFDHST, "hosts",
- &map_handle, &gc_cycle);
- retry:
if (mapped != NO_MAPPING)
{
const struct datahead *found = __nscd_cache_search (GETAI, key, keylen,
@@ -130,6 +132,11 @@ __nscd_getai (const char *key, struct nscd_ai_result **result, int *h_errnop)
retval = 0;
*result = resultbuf;
}
+ else
+ {
+ free (resultbuf);
+ *h_errnop = NETDB_INTERNAL;
+ }
}
else
{
@@ -154,11 +161,22 @@ __nscd_getai (const char *key, struct nscd_ai_result **result, int *h_errnop)
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. */
- goto retry;
+ if (__nscd_drop_map_ref (mapped, &gc_cycle) != 0 && retval != -1)
+ {
+ /* 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)
+ {
+ /* nscd is just running gc now. Disable using the mapping. */
+ __nscd_unmap (mapped);
+ mapped = NO_MAPPING;
+ }
+
+ free (resultbuf);
+
+ goto retry;
+ }
return retval;
}
diff --git a/nscd/nscd_getgr_r.c b/nscd/nscd_getgr_r.c
index 3a66bb849b..9e8170f0f2 100644
--- a/nscd/nscd_getgr_r.c
+++ b/nscd/nscd_getgr_r.c
@@ -18,6 +18,7 @@
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
+#include <alloca.h>
#include <assert.h>
#include <errno.h>
#include <grp.h>
@@ -84,19 +85,21 @@ nscd_getgr_r (const char *key, size_t keylen, request_type type,
struct group *resultbuf, char *buffer, size_t buflen,
struct group **result)
{
- const gr_response_header *gr_resp = NULL;
- const uint32_t *len = NULL;
- const char *gr_name = NULL;
- size_t gr_name_len = 0;
- int retval = -1;
int gc_cycle;
- const char *recend = (const char *) ~UINTMAX_C (0);
+ const uint32_t *len = NULL;
+ size_t lensize = 0;
/* If the mapping is available, try to search there instead of
communicating with the nscd. */
struct mapped_database *mapped = __nscd_get_map_ref (GETFDGR, "group",
&map_handle, &gc_cycle);
- retry:
+ retry:;
+ const gr_response_header *gr_resp = NULL;
+ const char *gr_name = NULL;
+ size_t gr_name_len = 0;
+ int retval = -1;
+ const char *recend = (const char *) ~UINTMAX_C (0);
+
if (mapped != NO_MAPPING)
{
const struct datahead *found = __nscd_cache_search (type, key, keylen,
@@ -176,10 +179,17 @@ nscd_getgr_r (const char *key, size_t keylen, request_type type,
resultbuf->gr_gid = gr_resp->gr_gid;
/* Read the length information, group name, and password. */
- if (len == NULL)
+ if (gr_name == NULL)
{
/* Allocate array to store lengths. */
- len = (uint32_t *) alloca (gr_resp->gr_mem_cnt * sizeof (uint32_t));
+ if (lensize == 0)
+ {
+ lensize = gr_resp->gr_mem_cnt * sizeof (uint32_t);
+ len = (uint32_t *) alloca (lensize);
+ }
+ else if (gr_resp->gr_mem_cnt * sizeof (uint32_t) > lensize)
+ len = extend_alloca (len, lensize,
+ gr_resp->gr_mem_cnt * sizeof (uint32_t));
vec[0].iov_base = (void *) len;
vec[0].iov_len = gr_resp->gr_mem_cnt * sizeof (uint32_t);
@@ -248,11 +258,20 @@ nscd_getgr_r (const char *key, size_t keylen, request_type type,
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. */
- goto retry;
+ if (__nscd_drop_map_ref (mapped, &gc_cycle) != 0 && retval != -1)
+ {
+ /* 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)
+ {
+ /* nscd is just running gc now. Disable using the mapping. */
+ __nscd_unmap (mapped);
+ mapped = NO_MAPPING;
+ }
+
+ goto retry;
+ }
return retval;
}
diff --git a/nscd/nscd_gethst_r.c b/nscd/nscd_gethst_r.c
index 5bd5997de0..25553babf4 100644
--- a/nscd/nscd_gethst_r.c
+++ b/nscd/nscd_gethst_r.c
@@ -105,21 +105,23 @@ nscd_gethst_r (const char *key, size_t keylen, request_type type,
struct hostent *resultbuf, char *buffer, size_t buflen,
struct hostent **result, int *h_errnop)
{
+ 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 (GETFDHST, "hosts", &map_handle, &gc_cycle);
+
+ retry:;
const hst_response_header *hst_resp = NULL;
const char *h_name = NULL;
const uint32_t *aliases_len = NULL;
const char *addr_list = NULL;
size_t addr_list_len = 0;
int retval = -1;
- int gc_cycle;
const char *recend = (const char *) ~UINTMAX_C (0);
int sock = -1;
-
- /* If the mapping is available, try to search there instead of
- communicating with the nscd. */
- struct mapped_database *mapped = __nscd_get_map_ref (GETFDHST, "hosts",
- &map_handle, &gc_cycle);
- retry:
if (mapped != NO_MAPPING)
{
const struct datahead *found = __nscd_cache_search (type, key, keylen,
@@ -354,11 +356,20 @@ nscd_gethst_r (const char *key, size_t keylen, request_type type,
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. */
- goto retry;
+ if (__nscd_drop_map_ref (mapped, &gc_cycle) != 0 && retval != -1)
+ {
+ /* 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)
+ {
+ /* nscd is just running gc now. Disable using the mapping. */
+ __nscd_unmap (mapped);
+ mapped = NO_MAPPING;
+ }
+
+ goto retry;
+ }
return retval;
}
diff --git a/nscd/nscd_getpw_r.c b/nscd/nscd_getpw_r.c
index 0d15a0cc3f..9af3858454 100644
--- a/nscd/nscd_getpw_r.c
+++ b/nscd/nscd_getpw_r.c
@@ -84,17 +84,18 @@ nscd_getpw_r (const char *key, size_t keylen, request_type type,
struct passwd *resultbuf, char *buffer, size_t buflen,
struct passwd **result)
{
+ int gc_cycle;
+ /* If the mapping is available, try to search there instead of
+ communicating with the nscd. */
+ struct mapped_database *mapped;
+ mapped = __nscd_get_map_ref (GETFDPW, "passwd", &map_handle, &gc_cycle);
+
+ retry:;
const pw_response_header *pw_resp = NULL;
const char *pw_name = NULL;
int retval = -1;
- int gc_cycle;
const char *recend = (const char *) ~UINTMAX_C (0);
- /* If the mapping is available, try to search there instead of
- communicating with the nscd. */
- struct mapped_database *mapped = __nscd_get_map_ref (GETFDPW, "passwd",
- &map_handle, &gc_cycle);
- retry:
if (mapped != NO_MAPPING)
{
const struct datahead *found = __nscd_cache_search (type, key, keylen,
@@ -199,11 +200,22 @@ nscd_getpw_r (const char *key, size_t keylen, request_type type,
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. */
- goto retry;
+ if (__nscd_drop_map_ref (mapped, &gc_cycle) != 0 && retval != -1)
+ {
+ /* 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)
+ {
+ /* nscd is just running gc now. Disable using the mapping. */
+ __nscd_unmap (mapped);
+ mapped = NO_MAPPING;
+ }
+
+ free (resultbuf);
+
+ goto retry;
+ }
return retval;
}
diff --git a/nscd/nscd_helper.c b/nscd/nscd_helper.c
index ae8dd6c91f..3c8693a93d 100644
--- a/nscd/nscd_helper.c
+++ b/nscd/nscd_helper.c
@@ -214,7 +214,7 @@ get_mapping (request_type type, const char *key,
struct mapped_database *
__nscd_get_map_ref (request_type type, const char *name,
- struct locked_map_ptr *mapptr, volatile int *gc_cyclep)
+ struct locked_map_ptr *mapptr, int *gc_cyclep)
{
struct mapped_database *cur = mapptr->mapped;
if (cur == NO_MAPPING)
diff --git a/nscd/nscd_initgroups.c b/nscd/nscd_initgroups.c
index 513d35d1e1..c33c76dfb3 100644
--- a/nscd/nscd_initgroups.c
+++ b/nscd/nscd_initgroups.c
@@ -46,17 +46,19 @@ __nscd_getgrouplist (const char *user, gid_t group, long int *size,
gid_t **groupsp, long int limit)
{
size_t userlen = strlen (user) + 1;
+ int gc_cycle;
+
+ /* If the mapping is available, try to search there instead of
+ communicating with the nscd. */
+ struct mapped_database *mapped;
+ mapped = __nscd_get_map_ref (GETFDGR, "group", &map_handle, &gc_cycle);
+
+ retry:;
const initgr_response_header *initgr_resp = NULL;
char *respdata = NULL;
int retval = -1;
int sock = -1;
- int gc_cycle;
- /* If the mapping is available, try to search there instead of
- communicating with the nscd. */
- struct mapped_database *mapped = __nscd_get_map_ref (GETFDGR, "group",
- &map_handle, &gc_cycle);
- retry:
if (mapped != NO_MAPPING)
{
const struct datahead *found = __nscd_cache_search (INITGROUPS, user,
@@ -148,11 +150,20 @@ __nscd_getgrouplist (const char *user, gid_t group, long int *size,
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. */
- goto retry;
+ if (__nscd_drop_map_ref (mapped, &gc_cycle) != 0 && retval != -1)
+ {
+ /* 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)
+ {
+ /* nscd is just running gc now. Disable using the mapping. */
+ __nscd_unmap (mapped);
+ mapped = NO_MAPPING;
+ }
+
+ goto retry;
+ }
return retval;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-16 23:18:33 +0000